-
Prof. Phil Duxbury27/03/2023, 08:45Plenary sessions
-
Prof. Huey-Wen Lin27/03/2023, 08:50
-
Laura Reina (Florida State University (US))27/03/2023, 09:00
Building on the achievements of the Large Hadron Collider (LHC) and the projected reach of its high-luminosity upgrade (HL-LHC), the work of the Energy Frontier during the Snowmass 2021 community exercise has focused on building the case for future explorations at and above the TeV scale and has explored possible scenarios beyond the HL-LHC. In this talk I will present highlights of the main...
Go to contribution page -
Fengwangdong Zhang (University of California Davis (US)), Fengwangdong Zhang (University of California, Davis)27/03/2023, 09:30
During the LHC RunII, both ATLAS and CMS experiments collected a large data set. Compared to the LHC RunI results, we have achieved much higher precision on measuring Higgs features like Yukawa couplings and the inclusive cross section. Meanwhile, we gained unprecedented high sensitivity to search for Higgs rare and exotic decays, and also for long-lived particles through Higgs portals. This...
Go to contribution page -
Rafał Staszewski (IFJ PAN Cracow (PL))27/03/2023, 10:00
Diffractive phenomena constitute a large fraction of interactions occurring in pp collisions at LHC. Because of their non-perturbative nature, the present understanding is still relatively poor and uncertain. One of the methods to study these processes is forward proton tagging. I will discuss the mechanism of the diffractive processes, recent results, and potential implications. The proton...
Go to contribution page -
Tim M.P. Tait (University of California, Irvine)27/03/2023, 11:00
I will discuss new developments in the study of physics beyond the Standard Model, including motivations based on the observations of the existence of dark matter and dark sectors, neutrino masses, the baryon asymmetry of the Universe, the flavor structure of the Standard Model fermions, and others. I'll discuss many strategies to resolve the origin of these mysteries, including direct and...
Go to contribution page -
Adrian Dumitru27/03/2023, 11:30
"Particle production in the projectile hemisphere (forward region)
Go to contribution page
introduces a kinematic asymmetry where the light-cone momenta of
projectile partons are much greater than those of the partons in the
target. The natural description of such processes is in terms of
eikonal propagation of very energetic projectile partons through a
strong color field. This approach permits the resummation... -
Dr Ketevi Adikle Assamagan (Brookhaven National Laboratory (US)), Kétévi Adiklè Assamagan27/03/2023, 12:00
In recent years, increased attention has been devoted to the issue diversity, equity and inclusion (DEI) in societal engagements, in particular in the scientific disciplines. Many institutions have been making efforts—with various degrees of commitment and success—to improve DEI within the context of their institutional activities. During the recent particle physics prioritization exercise,...
Go to contribution page -
Prof. Fred Olness (Southern Methodist University (US))27/03/2023, 14:00
-
Kai-Feng Chen (National Taiwan University (TW))27/03/2023, 14:45
Thanks to the high center-of-mass energy of the LHC, millions of top quarks have been produced and recorded, allow us to study the top quark related observables with a high precision. Deviations between theory predictions and experimental measurements in the top quark sector might indicate the first hints for new physics. This presentation focuses on the recent measurements at ATLAS and CMS...
Go to contribution page -
Olga Evdokimov (University of Illinois at Chicago (US))27/03/2023, 15:15
Heavy ion collisions allow access to novel QCD and QED studies in a laboratory setting. Experimental collaborations actively pursue this opportunity at RHIC and the LHC, and this vibrant physics program continues to yield insights into the interactions and properties of excited nuclear matter. Precision measurements of the properties of quark-gluon plasma (QGP) and the strong electromagnetic...
Go to contribution page -
Frank Martin Krauss (University of Durham (GB))27/03/2023, 16:15
In this talk I review the current state of precision QCD simulations for the LHC and beyond.
Go to contribution page -
Thomas Cridge (DESY)27/03/2023, 16:45
"PDFs play a key role across a broad range of areas of contemporary and future interest, and so the need for precision PDFs is only increasing. I will therefore review the current status of precision PDF determination, including advances on the experimental, methodological and theoretical fronts, as illustrated by examples from across the field. In the course of this I will focus on recent...
Go to contribution page -
Dr Tie-Jiun Hou27/03/2023, 17:15
The Parton Distribution Functions(PDFs), as an essential ingredient of realistic cross section calculation in the framework of perturbative QCD, describe the x-dependent structure of hadron base on global analysis amount hard-scattering measurements. As a weakness, the PDFs from global analysis receive larger uncertainty when data is scarce. Starting from first principle operator definitions...
Go to contribution page -
Maria Zurek, Dr Maria Żurek (Institute for Nuclear Physics, Research Center Juelich), Maria Żurek27/03/2023, 17:45
Spin is a unique probe to unravel the internal structure and QCD dynamics of nucleons. Exploration of the 3D spin structure of the nucleons is based on the complementarity of lepton scattering processes and purely hadronic probes. Some of the main questions that physicists have been trying to address in spin experiments involving different interactions and probes are: How does the spin of the...
Go to contribution page -
Roberto Petti (University of South Carolina (US))28/03/2023, 09:00
We report the results of a new global QCD analysis including deep-inelastic scattering (DIS) data off $^1$H, $^2$H, $^3$H, and $^3$He targets. Nuclear corrections are treated in terms of a nuclear convolution approach with off-shell bound nucleons. The off-shell corrections responsible for the modification of the structure functions (SFs) of bound nucleons are constrained in a global fit along...
Go to contribution page -
Richard Milner (MIT)28/03/2023, 09:00Parallel talk
The international ePIC collaboration has formed to design and construct the general purpose detector to be ready at the beginning of operation of the Electron-Ion Collider. ePIC will be located at the IP6 interaction region of the RHIC/EIC accelerator. By measuring inclusive and semi-inclusive DIS (where the target is shattered) and exclusive processes (where the target is left intact) in...
Go to contribution page -
Daniel Camarero Munoz (Brandeis University (US))28/03/2023, 09:00
The production of jets and prompt isolated photons at hadron colliders provides stringent tests of perturbative QCD. We present the latest measurements using proton-proton collision data collected by the ATLAS experiment at √s =13 TeV. Prompt inclusive photon production is measured for two distinct photon isolation cones, R=0.2 and 0.4, as well as for their ratio. The measurement is sensitive...
Go to contribution page -
Yacine Mehtar-Tani (Brookhaven National Laboratory)28/03/2023, 09:00
Recently, a novel factorization scheme has been put forward in the context of DIS . This new approach allows to connect the moderate x regime where the partonic picture is manifest to the small x regime best described by strong classical fields. In this work, we explore quantum evolution of the associated 3D gluon distribution that encodes saturation effects. In this framework, we obtain a...
Go to contribution page -
William Axel Leight (University of Massachusetts Amherst)28/03/2023, 09:00
A search for off-shell production of the Higgs boson using 139 fb−1 of 𝑝𝑝 collision data at √𝑠 = 13 TeV collected by the ATLAS detector at the Large Hadron Collider. The observable signature is a pair of on-shell 𝑍 bosons, with contributions both from the virtual Higgs boson and interference with other processes, and the two decay final states, 𝑍 𝑍 → 4ℓ and 𝑍 𝑍 → 2ℓ2𝜈 with ℓ = 𝑒 or 𝜇. The...
Go to contribution page -
Vincent Andrieux (Univ. Illinois at Urbana Champaign (US))28/03/2023, 09:00
We will present results on Spin Density Matrix Elements (SDMEs) measured in hard exclusive muoproduction of $\rho ^0$, $\omega $ and $\phi$ mesons on the proton at COMPASS using 160 GeV/$c$ polarised $\mu ^{+}$ and $\mu^{-}$ beams scattering off a liquid hydrogen target. The measurements cover the range 5 GeV/$c^2$ $< W <$ 17 GeV/$c^2$, 1.0 (GeV/$c$)$^2$ $< Q^2 <$ 10.0 (GeV/$c$)$^2$ and 0.01...
Go to contribution page -
Marc Escalier (IJCLab-Orsay)28/03/2023, 09:20
Combining measurements of many production and decay channels of the observed Higgs boson allows for the highest possible measurement precision for the properties of the Higgs boson and its interactions. These combined measurements are interpreted in various ways; specific scenarios of physics beyond the Standard Model are tested, as well as a generic extension in the framework of the Standard...
Go to contribution page -
Peter Alan Steinberg (Brookhaven National Laboratory (US))28/03/2023, 09:20
In relativistic heavy ion collisions, the charged ions produce an intense flux of equivalent photons. Thus, photon-induced processes are the dominant interaction mechanism when the colliding nuclei have a transverse separation larger than the nuclear diameter. In these ultra-peripheral collisions (UPCs), the photon provides a clean, energetic probe of the partonic structure of the nucleus,...
Go to contribution page -
Roberto Preghenella (INFN, Bologna (IT))28/03/2023, 09:20
EPIC is a general-purpose detector designed to deliver the full physics program of the Electron-Ion Collider (EIC). Particle identification (PID) at the EIC is an essential asset as well as a challenge: the PID systems have to provide excellent separation of pions, kaons, and protons over a large phase space with significant pion/electron suppression. EPIC addresses the physics requirements by...
Go to contribution page -
Peter Meinzinger28/03/2023, 09:20
Photoproduction is an important mode for production of jets and electro-weak particles at lepton--lepton and lepton--hadron colliders and allow for interesting studies of exclusive production at hadron--hadron colliders. In this talk, I will review recent efforts of extending the Sherpa event generator to include calculation of photoproduction for electron and proton beams, including the...
Go to contribution page -
COUGOULIC FLORIAN THIBAULT MANUEL Not Supplied28/03/2023, 09:20
We revisit the problem of small Bjorken-$x$ evolution of the gluon and flavor-singlet quark helicity distributions in the shock wave (s-channel) formalism. Earlier works on the subject in the same framework resulted in an evolution equation for the gluon field-strength $F^{12}$ and quark “axial current” $\bar{\psi} \gamma^+ \gamma^5 \psi$ operators in the double-logarithmic approximation...
Go to contribution page -
Yoshitaka Hatta (BNL)28/03/2023, 09:20
We study the small-x evolution equation for the gluon generalized parton distribution (GPD) Eg of the nucleon. It is shown that Eg at vanishing skewness exhibits the Regge behavior identical to the BFKL Pomeron, despite its association with nucleon helicity-flip processes. We also consider the effect of gluon saturation and demonstrate that Eg gets saturated in the same way as its...
Go to contribution page -
Nilanga Wickramaarachchi (The Catholic University of America)28/03/2023, 09:40
Excellent particle identification (PID) is one of the key requirements for the central detector of the Electron-Ion collider (EIC). Identification of the hadrons in the final state is important to study how different quark flavors contribute to nucleon properties. A detector with a radial size of only 7-8 cm, which uses the principle of Detection of Internally Reflected Cherenkov light (DIRC),...
Go to contribution page -
Andrew Denniston (MIT)28/03/2023, 09:40
Analyzing data from nuclear lepton Deep-Inelastic Scattering, Drell-Yan processes, and W and Z boson production, we show that factorizing nuclear structure into quasi-free nucleons and universally modified close-proximity Short Range Correlated (SRC) nucleon pairs allows us to fully describe the quark-gluon structure of nuclei down to very-low momentum fractions. This is the first combined...
Go to contribution page -
Brandon Manley28/03/2023, 09:40
We revisit the problem of the small Bjorken-$x$ asymptotics of the quark and gluon orbital angular momentum (OAM) distributions in the proton utilizing the revised formalism for small-$x$ helicity evolution derived recently in \footnote{F. Cougoulic, Y. V. Kovchegov, A. Tarasov, and Y. Tawabutr, Journal of High Energy Physics 2022,
Go to contribution page
10.1007/jhep07(2022)095 (2022).}. We relate the quark and... -
Flavio Guadagni (UZH Zurich)28/03/2023, 09:40
The efficiency of non-local subtraction methods such as qT-subtraction or jettiness subtraction is affected by the size of the power corrections below the slicing cutoff used in the calculation. In this talk I will discuss the scaling of the power corrections for different classes of observables, focussing in particular on transverse observables, which do not depend on the rapidity of QCD radiation.
Go to contribution page -
Marat Siddikov28/03/2023, 09:40
In this talk we present our theoretical studies of heavy quarkonia pair electro- and photoproduction in the collinear factorization framework. We focus on $J/\psi\ \eta_c$ pair production, and discuss the relation of different observables to generalized parton distributions (GPDs) of gluons. The unpolarized cross-section is dominated by contributions of transversely polarized $J/\psi$ mesons,...
Go to contribution page -
Anna Kaczmarska (Krakow IFJ PAN)28/03/2023, 09:40
The discovery of the Higgs boson with the mass of 125 GeV confirmed the mass generation mechanism via spontaneous electroweak symmetry breaking and completed the particle content predicted by the Standard Model. Even though this model is well established and consistent with many experimental measurements, it is not capable of solely explaining some observations. Many extensions of the Standard...
Go to contribution page -
M Gabriel Santiago (Center for Nuclear Femtography)28/03/2023, 10:00
We present a further step toward a global extraction of gluon generalized parton distributions (GPDs). In our previous work we performed the first global analysis of quark GPDs by including lattice quantum chromodynamics (QCD) calculations, global fitted forward parton distribution functions (PDFs), form factors (FFs), and Deeply Virtual Compton Scattering (DVCS) measurements from JLab and...
Go to contribution page -
Giulia Ripellino (Uppsala University (SE))28/03/2023, 10:00
The physics program at the High Luminosity LHC (HL-LHC) calls for a precision in the luminosity measurement of 1%. A larger uncertainty would represent the dominant systematic error in several precision measurements, including in the Higgs sector. To fulfil this requirement in an environment characterized by up to 140 simultaneous interactions per bunch crossing (200 in the ultimate scenario),...
Go to contribution page -
Dr Francesco Giuli (CERN)28/03/2023, 10:00
The production of W/Z bosons in association with heavy flavor jets or hadrons at the LHC is sensitive to the flavor content of the proton and provides an important test of perturbative QCD. We present the production of Z bosons in association with b-tagged large radius jets. The result highlights issues with modelling of additional hadronic activity and provides distinction between...
Go to contribution page -
33. Search for rare decays and lepton-flavor-violating decays of Higgs boson at the ATLAS experimentPawel Bruckman De Renstrom (Polish Academy of Sciences (PL))28/03/2023, 10:00
The Standard Model predicts several rare Higgs boson decay channels, among which are the decays to a Z boson and a photon, to a low-mass lepton pair and a photon, and to a meson and photon. The observation of some of these decays could open the possibility of studying the CP and coupling properties of the Higgs boson in a complementary way to other analyses. In addition,...
Go to contribution page -
Ingo Schienbein (Universite Grenoble Alpes), Ingo Schienbein, Ingo Schienbein28/03/2023, 10:00
Motivated by the wide range of kinematics covered by current and planned DIS facilities, we revisit the formalism, practical implementation, and numerical impact of target mass corrections (TMCs) for DIS on nuclear targets. These corrections are especially crucial for EIC physics. Within the Operator Product Expansion (OPE) formalism, we extend the analysis from individual nucleon targets...
Go to contribution page -
Keping Xie (University of Pittsburgh)28/03/2023, 10:00
When parton momentum faction $x$ of hadron becomes small, an enhancement from small-$x$ logarithms shows up, and eventually, we enter into a partonic saturation region. A consistent treatment of the small-$x$ logarithms requires an all-order resummation which can be achieved with the BFKL formalism. However, a boundary to delineate the small-$x$ resummation region from saturation one is...
Go to contribution page -
Dr Lucian Harland-Lang (University College London), Robert Samuel Thorne (University College London (UK)), Thomas Cridge (DESY)28/03/2023, 10:50
We consider the extension of the MSHT20 PDFs to an approximate N$^3$LO order. We describe the parameterisation of the missing N$^3$LO contributions and the determination of the theoretical uncertainties and their interpretation. We examine the impact of further data sets and look at the stability of predicted cross sections.
Go to contribution page -
Anatolii Koval (National Centre for Nuclear Research (PL))28/03/2023, 10:50
We will present COMPASS measurements of Deeply Virtual Compton Scattering and of exclusive pi0 production on the proton using 160 GeV polarized mu+ and mu- beams at the CERN SPS impinging on a 2.5m long liquid hydrogen target. The target was surrounded by a barrel-shaped time-of-flight system to detect the recoiling target protons. The scattered muons and the produced real photons were...
Go to contribution page -
Elisabetta Gallo (DESY)28/03/2023, 10:50
With the large data set collected during Run 2 of the LHC, it is possible to measure precise Higgs Yukawa couplings and go beyond inclusive Higgs boson cross section measurements. Simplified template cross sections (STXS), which make use of several variables to divide up the phase space of the different Higgs boson production modes, and differential cross sections can be measured. The STXS...
Go to contribution page -
Thomas Kurt Gehrmann (University of Zurich (CH))28/03/2023, 10:50
In this talk, we plan to discuss recent results on third-order (N3LO) perturbative QCD corrections to observables in massive gauge boson production at the LHC. We describe how existing NNLO calculations for vector-boson-plus-jet processes can be utilized to obtain fully differential N3LO predictions for fiducial cross sections in leptonic final states, using the qT subtraction method. The...
Go to contribution page -
Heikki Mäntysaari (University of Jyvaskyla (FI))28/03/2023, 10:50
A crucial ingredient in all calculations in the Color Glass Condensate framework is the non-perturbative input to the perturbative small-$x$ evolution equation such as the Balitsky-Kovchegov (BK) equation. Due to the non-perturbative nature, it has to be determined from experimental data, most naturally from total DIS cross section measurements.
So far it has not been possible in leading...
Go to contribution page -
Ahmed Tarek28/03/2023, 10:50
The Tile Calorimeter (TileCal) is a sampling hadronic calorimeter covering the central region of the ATLAS experiment, with steel as absorber and plastic scintillators as active medium. The High-Luminosity phase of LHC, delivering five times the LHC nominal instantaneous luminosity, is expected to begin in 2029. TileCal will require new electronics to meet the requirements of a 1 MHz trigger,...
Go to contribution page -
Paul Richard Newman (University of Birmingham (GB))28/03/2023, 11:10
The possibility of a joint interaction region and detector which could study ep/eA and pp/pA/AA at the HL-LHC was presented in [1]. Here we show the most recent developments on the design of such novel interaction region where, in ep/eA mode, one hadron or nuclear beam must go through the region unscathed while in hh mode that beam must be focused to collide with the other hadron or nuclear...
Go to contribution page -
Mr Buddhadeb Mondal (Universitaet Siegen (DE))28/03/2023, 11:10
The production of single top quarks as well as top-quark pairs in association with electroweak gauge bosons is presented together with the measurement of production asymmetries in ttbar and associated ttbar production. Using the data set collected during run 2 of the LHC (2015-2018, 139/fb of pp collisions at 13 TeV), the ATLAS experiment has observed ttX production, with X=gamma,Z and single...
Go to contribution page -
Mirja Tevio (University of Jyväskylä), Mirja Tevio (University of Jyväskylä)28/03/2023, 11:10
Measurements of Deep Inelastic Scattering (DIS) provide a powerful tool to probe fundamental structure of protons and other nuclei. The DIS cross sections can be expressed in terms of structure functions which are conventionally constructed via parton distribution functions (PDFs) that obey the DGLAP evolution equations. However, it is also possible to formulate the DGLAP evolution directly in...
Go to contribution page -
Khuram Tariq (Chinese Academy of Sciences (CN))28/03/2023, 11:10
Testing the Yukawa couplings of the Higgs boson to quarks and leptons is important to understand the origin of fermion masses. The talk presents several measurements in Higgs boson decays to two bottom quarks or two tau leptons, searches for Higgs boson decays to two charm quarks or two muons, as well as direct constraints of the charm-Yukawa coupling. The production of Higgs bosons in...
Go to contribution page -
Yossathorn Tawabutr (University of Jyväskylä)28/03/2023, 11:10Parallel talk
We study the single-inclusive particle production from proton-nucleus collisions in the dilute-dense framework of the color glass condensate (CGC) at next-to-leading order (NLO) accuracy. In this regime, the cross section factorizes into hard impact factors and dipole-target scattering amplitude describing the eikonal interaction of the partons in the target color field. We combine, for the...
Go to contribution page -
Shohini Bhattacharya (Brookhaven National Laboratory)28/03/2023, 11:10
We calculate the one-loop quark box diagrams relevant to polarized and unpolarized Deep Virtual Compton Scattering by introducing an off-forward momentum $l^\mu$ as an infrared regulator. Such a regularization enables us to unravel the poles $1/l^2$ related to the chiral anomaly in the polarized case and the trace anomaly in the unpolarized case. We interpret our results in terms of the...
Go to contribution page -
Paul Richard Newman (University of Birmingham (GB))28/03/2023, 11:20
The Large Hadron-electron Collider and the Future Circular Collider in electron-hadron mode [1] will make possible the study of DIS in the TeV regime providing electron-proton (nucleus) collisions with per nucleon instantaneous luminosities around $10^{34}$ ($10^{33}$) cm$^{-2}$s$^{-1}$. Here we describe the current detector design for such experiments [1,2] and the key developments needed,...
Go to contribution page -
Caterina Vernieri (SLAC National Accelerator Laboratory (US))28/03/2023, 11:30
In the high-luminosity era of the Large Hadron Collider, the instantaneous luminosity is expected to reach unprecedented values, resulting in up to 200 proton-proton interactions in a typical bunch crossing. To cope with the resulting increase in occupancy, bandwidth and radiation damage, the ATLAS Inner Detector will be replaced by an all-silicon system, the Inner Tracker (ITk). The innermost...
Go to contribution page -
Martha Constantinou28/03/2023, 11:30
Traditionally, lattice QCD computations of GPDs have been carried out in a frame, where the transferred momentum is symmetrically distributed between the incoming and outgoing hadrons. However, such frames are inconvenient for lattice QCD calculations since each value of the momentum transfer requires a separate calculation, increasing the computational cost. In a recent work...
Go to contribution page -
Giulia Marinelli28/03/2023, 11:30
We review the GENEVA Monte-Carlo framework, that combines three theoretical tools used for QCD precise prediction into a single structure.
Go to contribution page
It gives fully differential fixed-order calculations up to NNLO via $N$-jettiness subtraction, which are then combined with higher-order resummation in the $0$-jettiness resolution variable. This resummation is carried out to NNLL', matched to the... -
Pit Duwentaester, Pit Duwentäster (University of Jyväskylä)28/03/2023, 11:30
Parton distribution functions (PDFs) are most commonly determined by parameterizing them at some input scale Q_0 and then evolved to the desired scale Q through the DGLAP evolution equations. Extensions of the DGLAP equations have been proposed to account not only for the splitting of partons but also including non-linear 1/Q^n terms from the recombination of partons which slows down the pace...
Go to contribution page -
Michela Biglietti (Roma III)28/03/2023, 11:30
With the full Run 2 pp collision dataset collected at 13 TeV, very detailed measurements of Higgs boson properties can be performed using its decays into bosons. This talk presents measurements of Higgs boson properties using decays into bosons, including production mode cross sections and simplified template cross sections, as well as their interpretations.
Go to contribution page -
Yair Mulian28/03/2023, 11:30
Using the CGC effective theory together with the hybrid factorisation, we study forward photon+jet production in proton-nucleus collisions beyond leading order. We first compute the "real" next-to-leading order (NLO) corrections, i.e. the radiative corrections associated with a three-parton final state, out of which only two are being measured. Then we move to the "virtual" NLO corrections to...
Go to contribution page -
28/03/2023, 11:50
-
Arantxa Tymowska28/03/2023, 11:50
One very promising observable to study gluon saturation effects at high energy is photon+jet production at forward rapidity in proton-nucleus collisions. Since the produced photon does not rescatter on the target, this observable provides a clean environment to study the interaction of the quark probe with the dense target.
Go to contribution page
In this talk, we will present the results for the photon-quark... -
Katarzyna Wichmann (Deutsches Elektronen-Synchrotron (DE)), Sara Taheri Monfared (Deutsches Elektronen-Synchrotron (DE))28/03/2023, 11:50
In the parton branching (PB) approach, Collinear and TMD parton densities have been determined by fits to inclusive deep inelastic scattering (DIS) HERA data. This method allows one to simultaneously take into account soft-gluon emission and the transverse momentum recoils in the parton branchings along the QCD cascade. The latter leads to a natural determination of the TMD PDFs in a proton. A...
Go to contribution page -
Xiang Gao (Argonne National Lab)28/03/2023, 11:50
We present a lattice QCD determination of the nucleon generalized parton distributions (GPDs) from an analysis of the quasi-GPD matrix element within the leading-twist framework. We preform our study on a Nf=2+1+1 twisted mass fermions ensemble with a clover improvement. The faster and more effective lattice QCD calculations of GPDs using the asymmetric frames was applied so that we can...
Go to contribution page -
Gabriella Sciolla (Brandeis University (US))28/03/2023, 11:50
ATLAS-ITK Strip Collaboration
(the speaker to be selected by the ITk Speakers Committee after the contribution acceptance)The inner detector of the present ATLAS experiment has been designed and developed to function in the environment of the present Large Hadron Collider (LHC). At the ATLAS Phase-II Upgrade, the particle densities and radiation levels will exceed current levels by a...
Go to contribution page -
Simone Devoto (UNIMI)28/03/2023, 11:50
The associated production of a Higgs boson with a top-antitop quark pair is a crucial process at the LHC since it allows for a direct measurement of the top-quark Yukawa coupling.
Go to contribution page
In this talk we present our recent computation of the NNLO QCD corrections to ttH production within qT-subtraction, with an emphasis on the steps needed to apply this formalism to this process and on possible... -
Ethan Cline (Stony Brook University)28/03/2023, 12:10
There has been significant discussion in the community regarding a future $\mu^+\mu^-$ collider. While such a facility is still decades away from realization, it is also understood that significant technological development and feasibility demonstrations are necessary at lower beam energies. Here we propose such a possibility coupled with a rich physics program. We propose a future Muon-Ion...
Go to contribution page -
Prof. Nikolaos Kidonakis (Kennesaw State University)28/03/2023, 12:10
We present theoretical calculations of total cross sections and top-quark transverse-momentum and rapidity distributions in the associated production of a top-antitop pair with a photon ($t{\bar t}\gamma$ production). We include complete QCD and electroweak corrections at NLO as well as soft-gluon corrections at approximate NNLO (aNNLO). The aNNLO corrections are very significant, they...
Go to contribution page -
Kornelija Passek-Kumerički (Ruđer Bošković Institute, Zagreb, Croatia)28/03/2023, 12:10
Both deeply-virtual and photoproduction of mesons offer promising access
Go to contribution page
to generalized parton distributions and complementary description of different kinematical regions. The higher-order contributions offer stabilizing effect with respect to the dependence on renormalization scales, while higher-twist effects have been identified as especially important in the case of the production of... -
Marcos Miralles Lopez (IFIC (U.Valencia-CSIC))28/03/2023, 12:10
Studies of the CP properties of the Higgs boson in various production modes and decay channels are presented. Limits on the mixing of CP-even and CP-odd Higgs states are set by exploiting the properties of diverse final states.
Go to contribution page -
Nestor Armesto Perez (Universidade de Santiago de Compostela (ES))28/03/2023, 12:10
During the last ten years, a key problem in our understanding of particle production at small $x$ has been the fact that single inclusive particle spectra computed at NLO in pA collisions at forward rapidities using the hybrid model become negative at large transverse momenta. Different solutions have been proposed in the literature in the last years, including Sudakov and threshold...
Go to contribution page -
David Ruth (University of New Hampshire)28/03/2023, 14:00
The EIC physics program relies on successful measurements of exclusive final states, which produce charged particles (e.g. protons, pions) at far-forward pseudorapidities. Such particles are within a few millimeters of the outgoing hadron beam. Reconstruction of these particles requires use of silicon detectors placed directly into the accelerator vacuum, in the style of the Roman Pots used ...
Go to contribution page -
Duong Hai Nguyen (The State University of New York SUNY (US))28/03/2023, 14:00
Latest results on Z boson measurements are presented using collision data collected by CMS up to now. Differential production cross section measurements on several observables will be discussed.
Go to contribution page -
Marie Boer (Virginia Tech)28/03/2023, 14:00
The so-called Generalized Parton Distribution (GPDs) contain information about the parton's transverse position versus their longitudinal momentum, and can be accessed in hard exclusive reactions (where all products are known). Most of the current models rely on Deeply Virtual Compton Scattering (DVCS) measurements in their parametrization. However, extracting GPDs from other channels will...
Go to contribution page -
Thomas Boettcher (University of Cincinnati (US))28/03/2023, 14:00
The LHCb detector's forward geometry provides unprecedented kinematic
Go to contribution page
coverage at low Bjorken-x. LHCb's excellent momentum resolution,
vertex reconstruction, and particle identification enable precision
measurements at low transverse momentum and high rapidity in
proton-lead collisions, probing x as small as 10^-6. In this
contribution, we present recent studies of low-x physics using... -
Yang-Ting Chien (Georgia State University)28/03/2023, 14:00
We discuss the reconstruction of target jet and the framework of quantifying its internal substructure. Due to momentum and charge conservation, target and current correlation can be exploited which significantly constrains the event-wide particle distributions. We demonstrate this method using Pythia simulations of electron-proton collisions in the context of identifying the flavor of the...
Go to contribution page -
Giacomo Magni (Nikhef, VU Amsterdam)28/03/2023, 14:00
We present recent progress within the NNPDF analysis of parton distribution functions aimed to i) improve the accuracy of the determination by accounting for (approximate) N3LO corrections to the splitting functions and partonic matrix elements, ii) estimate the impact of missing higher order uncertainties within the NNLO global analysis, and iii) account for QED corrections and the impact of...
Go to contribution page -
Timothy Robert Andeen (University of Texas at Austin (US))28/03/2023, 14:20
A new era of hadron collisions will start around 2029 with the High-Luminosity LHC which will allow to collect ten times more data than what has been collected during 10 years of operation at LHC. This will be achieved by higher instantaneous luminosity at the price of higher number of collisions per bunch crossing.
In order to withstand the high expected radiation doses and the harsher...
Go to contribution page -
Tomas Sykora (Charles University (CZ))28/03/2023, 14:20
The elastic scattering of protons at 13 TeV is measured in the range of the protons' transverse momenta allowing the access to the Coulomb-Nuclear-Interference region. The data were collected thanks to dedicated special LHC beta* = 2.5km optics. The total cross section as well as rho-parameter, the ratio of the real to imaginary part of the forward elastic scattering amplitude, are measured...
Go to contribution page -
Yuxun Guo (University of Maryland), Yuxun Guo28/03/2023, 14:20
Generalized Parton Distributions (GPDs) have been one of the most important tools to access the nucleon 3D structure including its mass, angular momentum and mechanical properties. However, the extraction of GPDs has been challenging due to its high-dimension nature. Recent progress in lattice QCD have brought in many insights into the studies of GPDs. In this talk I will introduce the GPDs...
Go to contribution page -
Pierre-Hugues Beauchemin28/03/2023, 14:20
Precision measurements of the production cross-sections of W/Z boson at LHC provide important tests of perturbative QCD and information about the parton distribution functions for quarks within the proton. Extremely precise double-differential measurement of Z transverse momentum and rapidity at centre-of-mass energy of 8 TeV will be presented. Also, the transverse momentum of the W and Z...
Go to contribution page -
Dr Lucian Harland-Lang (University College London), Robert Samuel Thorne (University College London (UK)), Thomas Cridge (DESY)28/03/2023, 14:20
We provide a summary of recent developments on the MSHT parton distribution functions. This includes the addition of a variety of new data sets into the fit, and the potential impact of EIC data. The primary impact is seen on the details of the high-$x$ PDFs. We also consider the impact of procedural choices, and the effect of changes of PDFs on predicted cross sections.
Go to contribution page -
Ibrahim Chahrour (University of Michigan (US))28/03/2023, 14:20
The substructure of QCD jets has been the subject of intense investigation following the development of infrared and collinear safe clustering algorithms and observables. A particularly illuminating observable to study the radiation patterns of light and heavy partons is the Lund jet plane (LJP), where various types of emissions such as soft-collinear, hard-collinear, and non-perturbative...
Go to contribution page -
Youqi Song28/03/2023, 14:40
Jets are collimated sprays of final-state particles produced from initial high-momentum-transfer partonic (quark/gluon) scatterings in particle collisions. Since jets are multi-scale objects that connect asymptotically free partons to confined hadrons, jet substructure measurements in vacuum can provide insight into the parton evolution and the ensuing non-perturbative hadronization processes....
Go to contribution page -
Monika Mittal (Beihang University (CN))28/03/2023, 14:40
Recent results on the EW sector from the CMS Collaboration will be presented.
Go to contribution page -
Brandon Kriesten28/03/2023, 14:40
Deeply virtual exclusive reactions encode the dynamics of bound partons in hadrons through 3D quantum mechanical correlation functions - the generalized parton distributions; however, there are many levels of abstraction in the analysis from experimental data to information on hadron structure. There is an immediate need to develop advanced phenomenology and computational tools in preparation...
Go to contribution page -
Joey Huston (Michigan State University (US)), Pavel Nadolsky (Southern Methodist University), C.-P. Yuan (Michigan State University)28/03/2023, 14:40
We discuss recent developments in the global QCD analysis of parton distribution functions by CTEQ-TEA collaboration.
Go to contribution page -
Claire Gwenlan (University of Oxford (GB))28/03/2023, 14:40
This talk presents ATLAS recent measurements of distributions sensitive to Underlying event, the hadronic activity observed in relationship with the hard scattering in the event using the full ATLAS dataset at center-of-mass energy of 13 TeV. Measurement of charged-particle distributions as a function of Upsilon momentum and different Upsilon states will be discussed. The measurement benefits...
Go to contribution page -
Xueye Hu (University of Michigan (US)), Xueye Hu (Umich)28/03/2023, 14:40
The ATLAS Muon Spectrometer is designed to provide Muon triggering, identification and momentum measurement. It consists of resistive plat chambers (RPCs) and thin gap chambers (TGCs) that are used as primary trigger detectors, while monitored drift tubes (MDTs) and cathode strip chambers (CSCs) are utilized for precision trackering. To improve the Muon transverse momentum (pT) resolution at...
Go to contribution page -
Prof. Liuti Simonetta28/03/2023, 15:00
I will present a framework for the analysis of deeply virtual exclusive scattering experiments to enable the extraction of observables from data with a faithful representation of uncertainty. The extraction is focused on obtaining the different quark flavor and scale dependence of the various observables at NLO in perturbative QCD, while using the azimuthal phase dependence as a discriminant...
Go to contribution page -
Christophe Royon (The University of Kansas (US)), Christophe Royon (University of Kansas)28/03/2023, 15:00
Various measurements related to the study of hadronic jets substructure in proton collisions at 13 TeV with the CMS experiment are presented. The differential jet production cross section as a function of the jet mass and transverse momentum is shown in events with a Z boson plus jet topology, with and without the soft radiation within a jet removed by a jet grooming algorithm. Measurement of...
Go to contribution page -
Mr Nemer Chiedde (Centre National de la Recherche Scientifique (FR))28/03/2023, 15:00
The Large Hadron Collider (LHC) at CERN is the largest and most powerful particle collider today. The Phase-II Upgrade of the LHC will increase the instantaneous luminosity by a factor of 7 leading to the High Luminosity LHC (HL-LHC). At the HL-LHC, the number of proton-proton collisions in one bunch crossing (called pileup) increases significantly, putting more stringent requirements on the...
Go to contribution page -
Zaochen Ye (Rice University (US))28/03/2023, 15:00
Gluons are found to become increasingly dominant constituents of nuclear matter when being probed at higher energies or smaller Bjorken-$x$ values. This has led to the question of the ultimate fate of nuclear gluonic structure and its interaction with external probes at extreme density regimes when approaching the limit allowed by unitarity. In ultraperipheral collisions (UPCs) of relativistic...
Go to contribution page -
Clara Del Pio (University of Pavia and INFN)28/03/2023, 15:00
The weak mixing angle is a probe of the vector-axial coupling structure of electroweak interactions. It has been measured precisely at the $Z$-pole by experiments at the LEP and SLD colliders, but its energy dependence above $𝑚_Z$ remains unconstrained.
In this contribution we propose to exploit measurements of Neutral-Current Drell-Yan at large invariant dilepton masses at the Large...
Go to contribution page -
TIMOTHY J HOBBS (Argonne National Laboratory), Tim Hobbs (ANL)28/03/2023, 15:00
The question of the existence and possible magnitude of nonperturbative (often called "intrinsic") charm in the proton has long confounded attempts to cleanly isolate such a contribution in global analyses of high-energy experiments. In this talk, we show that the available (non)perturbative QCD theory and hadronic data have still not developed to a sufficient level to clearly resolve this...
Go to contribution page -
Antonio Iuliano (Universita e INFN sezione di Napoli (IT))28/03/2023, 15:20
SND@LHC is a compact and stand-alone experiment to perform measurements with neutrinos produced at the LHC in a hitherto unexplored pseudo-rapidity region of 7.2 < 𝜂 < 8.6, complementary to all the other experiments at the LHC. The experiment is located 480 m downstream of IP1 in the unused TI18 tunnel. The detector is composed of a hybrid system based on an 800 kg target mass of tungsten...
Go to contribution page -
Marco Guzzi (Kennesaw State University)28/03/2023, 15:20
We report about the impact of novel high-precision top-quark pair production 13 TeV measurements and other HF data from ATLAS and CMS on the CT18 global analysis of PDFs. We discuss features of a new top-quark data combination which complements the CT18 baseline. We discuss the impact on the gluon PDF and the extraction of the mass of the top quark in the pole mass approximation.
Go to contribution page
This... -
Tobias Neumann28/03/2023, 15:20Parallel talk
Precision theory predictions are crucial for interpreting LHC data. In
Go to contribution page
this talk, we present our public code and predictions for Drell-Yan
production up to the order N3LO, including transverse momentum
resummation up to N4LLp. We discuss the impact of these higher-order
corrections and compare them with experimental data. Furthermore, we
investigate the influence of N3LO parton... -
Moises David Leon Coello (Universidad de Sonora (MX))28/03/2023, 15:20
Since 2011 a wide variety of measurements suggest the existence of strong collectivity in collisions of small systems such as proton-proton (pp) and proton-nucleus (pPb) with hydrodynamic models and gluon saturation in the initial state as two theory alternatives showing consistency with the observations. These results raise the question as to whether such phenomena may be present in even...
Go to contribution page -
Prof. Yi Yang (National Cheng Kung University (TW))28/03/2023, 15:20
The production mechanism of quarkonia in $p$+$p$ collisions involves both the perturbative and non-perturbative QCD processes and is a topic of active investigation. Quarkonium production from Color Singlet Model and Color Octet Mechanism is expected to result in different jet activities, i.e., the number of jets associated with quarkonium creation, due to different numbers of emitted hard...
Go to contribution page -
Zaki Panjsheeri28/03/2023, 15:20
Mapping the 3D structure of the proton in terms of its spinning quark and gluon constituents is one of the main goals of current hadronic physics investigations, especially the field of femtography. Generalized parton distributions (GPDs) contribute to solving this problem. Fourier transforms of GPDs give single particle spatial densities of quarks and gluons for particular longitudinal...
Go to contribution page -
Christophe Royon (The University of Kansas (US)), Prof. Christophe Royon (University of Kansas)28/03/2023, 15:40
We present a phenomenological analysis of events with two high transverse momentum jets separated by a large rapidity interval void of particle activity, also known as jet-gap-jet events. In the limit where the collision energy is much larger than any other momentum scale, the jet-gap-jet process is described in terms of perturbative pomeron exchange between partons within the...
Go to contribution page -
Finn Mayhew28/03/2023, 15:40
The IceCube Neutrino Observatory is a Cherenkov detector located at the South Pole, instrumented in a cubic kilometer of ice. The DeepCore subdetector, at the lower center of the IceCube array, has a denser configuration and has allowed us to see GeV-scale neutrinos, which improves the sensitivity to atmospheric neutrino oscillations. Precious reconstruction is critical to neutrino oscillation...
Go to contribution page -
Bartlomiej Henryk Zabinski (Polish Academy of Sciences (PL))28/03/2023, 15:40
In the Standard Model, the ground state of the Higgs field is not found at zero but instead corresponds to one of the degenerate solutions minimising the Higgs potential. In turn, this spontaneous electroweak symmetry breaking provides a mechanism for the mass generation of nearly all fundamental particles. The Standard Model makes a definite prediction for the Higgs boson self-coupling and...
Go to contribution page -
Dr Francesco Giuli (CERN), xFitter developers28/03/2023, 15:40
We present the xFitter project which provides an open-source software framework for the determination of the proton's parton distribution functions and for the interpretation of the physics analyses in the context of Quantum Chromodynamics. The project has been used for a number of analyses performed by the LHC collaborations and theory community, which are summarised briefly. The xFitter...
Go to contribution page -
Zhite Yu28/03/2023, 15:40
Generalized parton distributions (GPDs) are important non-perturbative functions that provide tomographic images of partonic structures of hadrons. We introduce a type of exclusive processes for a better study of GPDs, which we refer to as single diffractive hard exclusive processes (SDHEPs), and give a general proof for their factorization into GPDs. We demonstrate that the SDHEP is not only...
Go to contribution page -
Daniel Adamiak (Ohio State University)28/03/2023, 16:30
In order to solve the proton spin problem, the small-$x$ asymptotics of the helicity parton distribution functions (hPDFs) need to be understood. New theory has been developed for the small-$x$ evolution of these hPDFs, able to extrapolate the small-$x$ behaviour of the quark and gluon hPDFs. At large $N_c \& N_f$, these evolution equations close and are amenable to numerical computation. In...
Go to contribution page -
Zhite Yu28/03/2023, 16:30
Determining the CP property of the Higgs boson is important for a precision test of the Standard Model as well as for the search for new physics. We propose a novel jet substructure observable based on the azimuthal anisotropy in a linearly polarized gluon jet that is produced in association with a Higgs boson at hadron colliders, and demonstrate that it provides a new CP-odd observable for...
Go to contribution page -
Katarzyna Wichmann (Deutsches Elektronen-Synchrotron (DE))28/03/2023, 16:30
A new measurement of inclusive jet cross sections in neutral current deep inelastic scattering using the ZEUS detector at the HERA collider is obtained. The data were taken at HERA 2 at a center of mass energy of 318 GeV and correspond to an integrated luminosity of 347 pb−1. Massless jets, reconstructed using the kT-algorithm in the Breit reference frame, are measured as a function of the...
Go to contribution page -
Tony Menzo28/03/2023, 16:30
We present the recent and ongoing developments with respect to the use of machine learning methods in models of hadronization as implemented in general purpose event generators. Specifically we focus on the performance of generative machine learning algorithms in reproducing Pythia-simulated hadronization kinematics and global observables. Finally, we will discuss the inclusion of error...
Go to contribution page -
Walid KAABI28/03/2023, 16:30
PERLE is a facility to probe high-current multiturn energy recovery to be built at IJClab in Orsay. Besides being a key step towards the use of this technology, one of the priorities established in the last European Strategy for Particle Physics [1], in top energy colliders, it will also provide a strong physics programme on its own. We review the status of PERLE and the steps from the...
Go to contribution page -
Jeongsu Bok (Pusan National University (KR))28/03/2023, 16:30
Transverse Single Spin Asymmetries (TSSAs) in transversely polarized proton-proton collisions ($p^{\uparrow}+p$) have been a fruitful source for studying the spin structure of the proton. In the 2015 RHIC data taking periods, collisions of polarized protons with nuclei ($p^{\uparrow}+A$) were studied for the first time. The measurements of TSSAs in $p^{\uparrow}+p$ and $p^{\uparrow}+A$...
Go to contribution page -
Jeremy Borden28/03/2023, 16:50
We consider the novel small-$x$ helicity evolution equations previously derived using the light-cone operator treatment (LCOT) [1,2]. In the double logarithmic approximation (summing powers of $\alpha_s\ln^2(1/x)$) and in the large-$N_c$ limit, the evolution yields a closed system of equations for which we construct an analytic solution. This solution can then provide small-$x$, large-$N_c$...
Go to contribution page -
Katarzyna Wichmann (Deutsches Elektronen-Synchrotron (DE))28/03/2023, 16:50
Recent measurements of jet cross sections in proton-proton collisions with the CMS experiment are presented. The measured jet cross sections are corrected for detector effects and compared with the predictions from perturbative QCD, and exploited to derive constraints on parton distribution functions and to mesure alpha_S.
Go to contribution page -
Miguel Angel Principe Martin (Universidad Autónoma de Madrid)28/03/2023, 16:50
The LHC produces a vast sample of top quark pairs and single top quarks. Measurements of the inclusive top quark production rates at the LHC have reached a precision of several percent and test advanced Next-to-Next-to-Leading Order predictions in QCD. Differential measurements in several observables are important to test SM predictions and improve Monte Carlo generator predictions. In this...
Go to contribution page -
William Frederick George (University of Birmingham (GB)), William Frederick George (University of Birmingham)28/03/2023, 16:50
The large integrated luminosity collected by the ATLAS detector at the highest proton-proton collision energy provided by LHC allows to probe the presence of new physics that could enhance the rate of very rare processes in the SM. The LHC can therefore gain considerable sensitivity for Flavour Changing Neutral Current (FCNC) interactions of the top quark. In the SM, FCNC involving the...
Go to contribution page -
Matthew Solt (University of Virginia)28/03/2023, 16:50
The constituents of dark matter are still unknown, and the viable possibilities span a very large mass range. Specific scenarios for the origin of dark matter sharpen the focus on a narrower range of masses: the natural scenario where dark matter originates from thermal contact with familiar matter in the early Universe requires the DM mass to lie within about an MeV to 100 TeV. Considerable...
Go to contribution page -
Xilin Liang (University of California, Riverside)28/03/2023, 16:50
There have been numerous attempts in the last couple of decades to understand the origin of the unexpectedly large transverse single spin asymmetry ($A_{N}$) of inclusive hadron production at forward rapidities observed in $p^{\uparrow}$+$p$ collisions at different center-of-mass energies ($\sqrt{s}$). The current theoretical framework to explain such a puzzle includes the twist-3...
Go to contribution page -
Ching Him Leung (University of Illinois at Urbana-Champaign)28/03/2023, 17:10
SeaQuest has measured dimuon events from the interaction of 120 GeV proton beam on liquid hydrogen and deuterium targets with dimuon mass between 2 and 8 GeV. These dimuon events contain both the Drell-Yan process and the charmonium ($J/\psi$ and $\psi^\prime$) production. The first result of the Drell-Yan $(p+d)/2(p+p)$ cross section ratio, based on the analysis of a fraction of the collected...
Go to contribution page -
Keping Xie (University of Pittsburgh)28/03/2023, 17:10
The Drell-Yan lepton pair productions have been measured to an unprecedented precision level at the LHC. In companion, the theoretical calculations should reach the same level. However, a visible discrepancy among different next-to-next-to-leading order (NNLO) calculations has been discovered by both the CTEQ-TEA group and also by S. Alekhin~\emph{et al.} In this study, we carefully examine...
Go to contribution page -
Ming Li28/03/2023, 17:10
Double spin asymmetries for particle and jet productions in longitudinally polarized proton-proton collisions are among the key measurements at RHIC to extract the spin fraction of gluons inside the proton. Although next-to-leading order perturbative QCD predictions have been quite successful in fitting experimental data within the RHIC kinematics, to constrain gluons at even smaller x, one...
Go to contribution page -
Halina Abramowicz (Tel Aviv University (IL))28/03/2023, 17:10
The LUXE experiment (Laser Und XFEL Experiment) is an experiment in planning at DESY Hamburg using the electron beam of the European XFEL. LUXE is intended to study collisions between a high-intensity optical laser pulse and 16.5 GeV electrons from the XFEL electron beam, as well as collisions between the laser pulse and high-energy secondary photons. This will elucidate quantum...
Go to contribution page -
Jose Enrique Garcia Navarro (Univ. of Valencia and CSIC (ES))28/03/2023, 17:10
The remarkably large dataset collected with the ATLAS detector at the highest proton-proton collision energy provided by LHC allows to use the large sample of top quark events to test theoretical predictions with unprecedented precision. Recent highlights are the new measurement of W-boson polarisation in ttbar events single-top quark polarisation, new top-quark mass measurements as well as...
Go to contribution page -
Dr Minho Kim (RIKEN)28/03/2023, 17:10
In the high-energy $p+p$ collisions, the transverse single spin asymmetry for very forward neutron production has been interpreted by an interference between $\pi$ (spin flip) and $a_1$ (spin non-flip) exchange with a non-zero phase shift. The $\pi$ and $a_1$ exchange model predicted the neutron asymmetry would increase in magnitude with transverse momentum ($p_{\scriptsize{\textrm{T}}}$) in...
Go to contribution page -
Simone Venturini (University of Pavia)28/03/2023, 17:30
Using the light-front wave functions (LFWFs) overlap representation, we built a theoretical model for the pion state, that parametrizes different pion parton distribution functions. The model is constructed with two sets of parameters, that can be fitted separately by performing two independent fits: one for the collinear, and one for the transverse direction.
Go to contribution page
At present, we have been able to... -
Yu-Chen (Janice) Chen (Massachusetts Institute of Technology)28/03/2023, 17:30
We present the first measurement of two-particle angular correlations of charged particles emitted in high energy $e^+e^-$ annihilation up to $\sqrt{s}=$209~GeV and anti-kT jet energy spectrum and substructure measurements using the archived ALEPH $e^+e^-$ data taken between 1992 and 2000.
The correlation functions are measured as a function of charged particle multiplicity for the first...
Go to contribution page -
Dr Daniel Stump (Michigan State University)28/03/2023, 17:30
For the CTEQ-TEA Collaboration
We present predictions of the cross section of high-energy neutrino-nucleon scattering.
Go to contribution page
The calculations are based on CT18NNLO parton distribution functions, and their uncertainties. For the highest energies, we extrapolate the PDFs to small x according to several assumptions, which affect the uncertainties at such high energies.
The results can be applied... -
Jae Nam (Temple University), Jae Nam28/03/2023, 17:30
While the unpolarized valence quark ($d$ and $u$) distributions are well determined from DIS and $pp/p\bar{p}$ experiments, their sea quark counterparts, $\bar{d}$ and $\bar{u}$, are much less constrained, in particular, near the valence region.
Go to contribution page
Measurements of $W^+/W^-$ production ratio in $pp$ collider experiments, such as the STAR experiment at RHIC, are sensitive to the $\bar{d}/\bar{u}$... -
M Gabriel Santiago (Center for Nuclear Femtography)28/03/2023, 17:30
We study the small-$x$ asymptotics of the flavor non-singlet T-odd leading-twist quark transverse momentum dependent parton distributions (TMDs). While the leading eikonal small-$x$ asymptotics of the quark Sivers function is given by the spin-dependent odderon, we are interested in revisiting the sub-eikonal correction considered by us earlier. We first simplify the expression for the TMD at...
Go to contribution page -
Dr Alex Jentsch (Brookhaven National Laboratory, EIC, STAR), Alexander Jentsch28/03/2023, 17:30
Missing abstract
Go to contribution page -
Jae Nam, Jae Nam (Temple University)28/03/2023, 17:50
Presented are the latest updates of the measurement of the azimuthal decorrelation angle and the transverse momentum imbalance between the leading jet and the scattered lepton in deep inelastic scattering with the ZEUS detector at HERA. During the HERA II data-taking period, electrons and positrons collided with protons with a center of mass energy of 318 GeV. The total integrated luminosity...
Go to contribution page -
Tanjona R. Rabemananjara (NIKHEF & VU Amsterdam)28/03/2023, 17:50
Accurate theory calculations for neutrino-nucleus scattering rates are essential in the interpretation of neutrino experiments, from oscillation measurements to astroparticle physics at neutrino telescopes. In the deep-inelastic (DIS) regime, neutrino structure functions can be reliably evaluated in the framework of perturbative QCD (pQCD). However, large uncertainties affect these structure...
Go to contribution page -
294. Twist-four gravitational form factor $\bar{C}_{q,g}$ at NNLO QCD from trace anomaly constraintsKazuhiro Tanaka28/03/2023, 17:50
It is known that the trace anomaly in the QCD energy-momentum tensor $T^{\mu \nu}$ can be attributed to the anomalies for each of the gauge-invariant quark part and gluon part of $T^{\mu \nu}$, and their explicit three-loop formulas have been derived in the $\overline{\rm MS}$ scheme in the dimensional regularization. The matrix elements of this quark/gluon decomposition of the QCD trace...
Go to contribution page -
Tomas Sykora (Charles University (CZ))28/03/2023, 18:10
Correlations between charged particles provide important insight about the hadronization process. The analysis of the momentum difference between charged hadrons in pp, p-lead, and lead-lead collisions of various energies is performed in order to study the dynamics of hadron formation. The spectra of correlated hadron chains are explored and compared to the predictions based on the quantized...
Go to contribution page -
David Ruth (University of New Hampshire)28/03/2023, 18:10
As one of the essential building blocks of ordinary matter, understanding the proton and the strong force that binds its constituents are of crucial importance. At low $Q^2$, the perturbative description of QCD fails, and it is necessary to employ effective theories such as Chiral Perturbation Theory. One way of directly testing these effective theories is the measurement of polarizabilities,...
Go to contribution page -
Prof. Jun Gao (Shanghai Jiao Tong University), Dr Tim Hobbs (ANL)28/03/2023, 18:10
Recasting phenomenological Lagrangians in terms of SM effective field theory (SMEFT) provides a valuable means of connecting potential BSM physics at momenta well above the electroweak scale to experimental signatures at lower energies. We jointly fit the Wilson coefficients of SMEFT operators as well as the PDFs in an extension of the CT18 global analysis framework, obtaining self-consistent...
Go to contribution page -
Bogdan Wojtsekhowski (TJNAF)29/03/2023, 08:40
A fixed target experiment, HERCULES, similar to HERMES but with 500 times higher electron-nucleon luminosity, at EIC will allow a big advance in hadron physics. The internal target with the polarized hadron beam also has an important physics program. The high intensity photon beam will allow to study photo-production of the $c\bar c$ excited states and recently discovered XYZ states. We will...
Go to contribution page -
Sebouh Paul29/03/2023, 09:00
The CLAS Collaboration presents a measurement of the nuclear dependence of di-hadron production in deep inelastic scattering off nuclei using the CLAS detector at Jefferson Lab. We report the first measurement of azimuthal correlations in nuclear DIS, and their dependence on kinematic variables such as rapidity separation and the transverse momenta of the two pions. We observe that the...
Go to contribution page -
Marc-Andre Pleier (Brookhaven National Laboratory (US)), Marc-Andre Pleier (BNL), Marc-Andre Pleier (BNL)29/03/2023, 09:00
Measurements of multiboson production at the LHC probe the electroweak gauge structure of the Standard Model for contributions for anomalous gauge couplings. Processes involving quartic gauge couplings have become experimentally accessible at the LHC. We present recent ATLAS results of vector-boson scattering in the Zgamma channel, where the Z boson decays to neutrinos producing missing...
Go to contribution page -
Bryan Ramson (Fermilab)29/03/2023, 09:00
Long-baseline neutrino oscillation experiments present some of the most compelling paths towards beyond-the-standard-model physics through measurement of PMNS matrix elements and observation of the degree of leptonic CP violation. State-of-the-art long-baseline oscillation experiments, like NOvA and T2K, are currently statistically limited, however uncertainty in neutrino-nucleus scattering...
Go to contribution page -
Alberto Accardi (Hampton U. and Jefferson Lab)29/03/2023, 09:00
We review various methods used to estimate uncertainties in quantum correlation functions, such as parton distribution functions (PDFs). Using a toy model of a PDF, we compare the uncertainty estimates yielded by the traditional Hessian and data resampling methods, as well as from explicitly Bayesian analyses using nested sampling or hybrid Markov chain Monte Carlo techniques. We investigate...
Go to contribution page -
Zilong Chang (Indiana University)29/03/2023, 09:00
Measurements of the longitudinal double-spin asymmetry, $A_{LL}$, by the STAR experiment have contributed significantly to our understanding of the gluon helicity distribution, $\Delta g(x)$, inside the proton. Results from the 2009 inclusive jet measurement, when included into global analyses, indicated substantial positive polarization for gluons with partonic momentum fraction $x$ greater...
Go to contribution page -
Wanchen Li (Penn State University)29/03/2023, 09:00
It is well known that the small x calculations for the variety of observables are characterized by large corrections at the next-to-leading order (NLO). Resummation procedure for the gluon Green's function was constructed some time ago, which takes into account correct collinear limits, through appropriate subtractions of higher order poles and shifts of the leading poles. In the present work...
Go to contribution page -
Prof. Pavel Nadolsky (Southern Methodist University)29/03/2023, 09:20
Precise and accurate parton distributions are necessary to reach the physics goals of future colliders, from search for new physics to claims on non-perturbative QCD. In the last years, the CT group has expanded the concept of uncertainties in PDF analyses, in particular by including the concept of “sampling accuracy” in contrast to “fitting accuracy.” The exploration of the sampling accuracy...
Go to contribution page -
Peter Risse29/03/2023, 09:20
Mass-dependent quark contributions are of great importance to DIS processes. The simplified-ACOT-$\chi$ scheme includes these effects over a wide range of momentum transfers up to next-to-leading order in QCD. In recent years an improvement in the case of neutral current DIS has been achieved by using zero-mass contributions up to next-to-next-to-leading order (NNLO) with massive phase-space...
Go to contribution page -
Dr Chao Peng (Argonne National Laboratory), Chao Peng (Argonne National Laboratory), Chao Peng29/03/2023, 09:20
Coherent electro-production of $J/\psi$ on $^4$He offers a unique opportunity to explore the gluonic component of its matter distribution directly. The gluonic matter form factor of $^4$He can be experimentally accessed by performing a measurement of the reaction $^4 He(e, e' ^4He)J/\psi$ where the $J/\psi$ is reconstructed via missing mass. Such measurement requires the coincidence detection...
Go to contribution page -
Farid Salazar (UCLA/UCB/LBNL)29/03/2023, 09:20
The potential discovery of gluon saturation is one of the chief goals of the future Electron-Ion Collider (EIC) program. The Color Glass Condensate (CGC) is an effective field theory (EFT) to characterize this novel regime of nuclear matter. In recent years, tremendous efforts have been carried out to promote the theory and phenomenology of the CGC EFT to higher precision.
We contribute to...
Go to contribution page -
Devon Loomis (University of Michigan)29/03/2023, 09:20
The spin physics program at the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) remains an essential tool in illuminating the internal spin structure of the proton. One major emphasis of the program is the measurement of longitudinal double spin asymmetries $(A_{LL})$ in a number of different final states from collisions of longitudinally polarized protons $(\vec{p} +...
Go to contribution page -
Irene Zoi (Fermi National Accelerator Lab. (US))29/03/2023, 09:20
Vector boson scattering is a key production process to probe the electroweak symmetry breaking of the standard model, since it involves both self-couplings of vector bosons and coupling with the Higgs boson. If the Higgs mechanism is not the sole source of electroweak symmetry breaking, the scattering amplitude deviates from the standard model prediction at high scattering energy. Moreover,...
Go to contribution page -
Mr Lucas Kotz (Southern Methodist University)29/03/2023, 09:40
We present a methodology to improve the determination of PDF parametrization, the Fantômas4QCD package. It is achieved through Bézier curve fitting. Thanks to the implementation of our technique in the xFitter package, we have performed a global analysis of the pion PDF — the first analysis to account for the role of the functional form in its uncertainty.
Go to contribution page -
Man Yuan (University of Michigan (US)), Man Yuan (University of Michigan)29/03/2023, 09:40
easurements of multiboson production at the LHC are important probes of the electroweak gauge structure of the Standard Model and give constraints on anomalous gauge boson couplings. In this talk we present recent ATLAS measurement of double-polarization in WZ events and highlight the first observation of simultaneous pair-production of longitudinally polarized vector bosons. We also show...
Go to contribution page -
Guillaume Beuf29/03/2023, 09:40
In this talk, we will discuss the back-to-back limit of the DIS dijet production at next-to-eikonal accuracy computed in a highly boosted gluon background field within the Color Glass Condensate (CGC) framework. We will show that the various types of next-to-eikonal corrections can be written as field strength insertions on the CGC Wilson lines which provide direct relation with the gluon TMDs...
Go to contribution page -
Prof. Bernd Surrow (Temple University)29/03/2023, 09:40
One of the primary goals of the RHIC spin program is to determine the polarized gluon distribution
Go to contribution page
function, $\Delta g$, within the proton. At the leading order, proton-proton collisions involve a mixture of
quark-quark, quark-gluon, and gluon-gluon scatterings. At RHIC kinematics, the quark-gluon
and gluon-gluon contributions dominate, which makes RHIC an ideal tool to study $\Delta g$.... -
Rachel Montgomery29/03/2023, 09:40
This talk will discuss future tagged deep inelastic scattering (TDIS) measurements in Hall A of Jefferson Lab, which will directly probe the elusive mesonic content of the nucleon via the Sullivan process. The idea that the nucleon’s mesonic content could be explored through electron nucleon deep inelastic scattering has a long history with the Sullivan process. However, even after five...
Go to contribution page -
Dr Jianwei Qiu (Jefferson Lab), Dr Kazuhiro Watanabe (Seikei University)29/03/2023, 09:40
Heavy quarkonium production of high transverse momentum ($p_T$) in hadronic collisions can be studied in the QCD factorization formalism in both leading and the first subleading power in $1/p_T$ expansion with heavy quarkonium fragmentation functions (FFs) [1]. The scale evolution of quarkonium FFs enables us to resum logarithmically enhanced corrections $\alpha_s\ln(p_T^2/m^2)$ with heavy...
Go to contribution page -
Kirtimaan Ajaykant Mohan29/03/2023, 10:00
When performing fits to data using the popular $\chi^2$ approach, uncertainty to fit parameters is determined by contours of $\Delta\chi^2=T^2$, where the tolerance $T =1 $ corresponds to the $68\%$ confidence level. PDF fits have to deal with the problem of having data sets, particularly from different experiments, that are in tension with each other. The traditional approach used by PDF...
Go to contribution page -
Miaoran Lu (University of Iowa (US))29/03/2023, 10:00
The Liquid Argon Calorimeters are employed by ATLAS for all electromagnetic calorimetry in the pseudo-rapidity region |η| < 3.2, and for hadronic and forward calorimetry in the region from |η| = 1.5 to |η| = 4.9. They also provide inputs to the first level of the ATLAS trigger. After successful period of data taking during the LHC Run-2 between 2015 and 2018 the ATLAS detector entered into the...
Go to contribution page -
Ivan Vitev29/03/2023, 10:00
Centrality-dependent data of hadron and jet attenuation in deep inelastic scattering (DIS) on nuclei can shed new light on the physics of final-state interactions in nuclear matter, including the path-length dependence of in-medium parton shower evolution. Thus-far, such measurements that can disentangle shadowing and energy loss effects on semi-inclusive DIS cross sections have not been...
Go to contribution page -
Dr Chiara Bissolotti29/03/2023, 10:00
We study the potential of DIS measurements at the Large Hadron-electron Collider (LHeC) and the Electron-Ion Collider (EIC) to probe physics beyond the Standard Model. Our study is performed in the context of the Standard Model Effective Field Theory (SMEFT). We find that future measurements at both machines can improve existing SMEFT fits to precision electroweak data by resolving blind spots...
Go to contribution page -
289. Hadronization dynamics from the spectral representation of the gauge invariant quark propagatorCaroline S. R. Costa (Jefferson Lab)29/03/2023, 10:00
Using the spectral representation of the quark propagator we study the Dirac decomposition of the gauge invariant quark propagator, whose imaginary part describes the hadronization of a quark as this interacts with the vacuum.
In light-like axial gauge, we obtain a new sum rule for the spectral function associated to the gauge fixing vector. We then demonstrate the formal gauge invariance...
Go to contribution page -
Guillaume Beuf29/03/2023, 10:00
We examine the process of producing a quark-gluon dijet in DIS in the CGC at leading order. We have to go beyond the eikonal approximation by including quark exchanges with the target that we take to be unpolarised. We provide final expressions for the DIS cross sections including quark masses. This might be used as a leverage for experimentally tagging one heavy quark jet and one light jet....
Go to contribution page -
Peter Semler Cooper (George Mason University (US))29/03/2023, 10:50
An overview of the latest NA62 results and the future prospect of the experiment are presented. The NA62 experiment at CERN collected the world’s largest dataset of charged kaon decays in 2016-2018, leading to the first measurement of the branching ratio of the ultra-rare $K^+ \rightarrow \pi^+ \bar\nu \nu$ decay, based on 20 candidates.
Go to contribution page
The radiative kaon decay $K^+ \rightarrow \pi^0 e^+ \nu... -
Yao Xu (Berkeley University)29/03/2023, 10:50
The lepton-jet momentum imbalance in deep inelastic scattering events offers a useful set of observables for unifying collinear and transverse-momentum-dependent frameworks for describing high energy Quantum Chromodynamics (QCD) interactions. The imbalance in the laboratory frame was measured recently [1] using positron-proton collisions from HERA Run II. With a new machine learning method,...
Go to contribution page -
Jan Vanek (Brookhaven National Laboratory)29/03/2023, 10:50
In the 1970's, Fermilab discovered that $\Lambda$ hyperons are polarized in collisions of unpolarized protons on beryllium. This discovery initiated a 50 year long series of measurements which aimed at solving this $\Lambda$ hyperon polarization puzzle. Although this puzzle remains to be an open question, the self-polarizing feature of $\Lambda$ hyperon has been providing an important...
Go to contribution page -
Naseem Bouchhar (IFIC - Univ. of Valencia and CSIC (ES))29/03/2023, 10:50
Experimental uncertainties related to hadronic object reconstruction can limit the precision of physics analyses at the LHC, and so improvements in performance have the potential to broadly increase the impact of results. Recent refinements to reconstruction and calibration procedures for ATLAS jets and MET result in reduced uncertainties, improved pileup stability and other performance gains....
Go to contribution page -
yoshitaka hatta (BNL)29/03/2023, 10:50
We propose semi-inclusive diffractive deep inelastic scattering (SIDDIS) to investigate the gluon tomography in the nucleon and nuclei at small-x. The relevant diffractive quark and gluon parton distribution functions (DPDF) can be computed in terms of the color dipole S-matrices in the fundamental and adjoint representations, respectively.
Go to contribution page -
Dr Alex Jentsch (Brookhaven National Laboratory, EIC, STAR), Alexander Jentsch29/03/2023, 10:50
The mechanism of the nuclear modifications of parton densities at $x > 0.3$ (EMC effect) observed in DIS experiments remains a major open question in QCD. In inclusive nuclear DIS, $e + A \rightarrow e’ + X$, one observes only the average effect but cannot learn anything about the underlying nuclear interactions. In DIS on the deuteron with spectator nucleon tagging, $e + D \rightarrow e’ + X...
Go to contribution page -
Paul Anderson (William & Mary)29/03/2023, 11:10
The electron-ion collider (EIC) will be the first collider capable of simultaneously polarizing the spin of both the leptons and hadrons involved. This opens the possibility for measurements of the nucleon spin structure and Parity-Violating (PV) asymmetry in Deep Inelastic Scattering (DIS), for the first time, at a collider setting. At the meantime, it also calls for a complete derivation of...
Go to contribution page -
Dr Henri Hanninen (University of Jyväskylä)29/03/2023, 11:10
We calculate [1] the contribution from the $q \bar q g$ state production to the diffractive cross sections in deep inelastic scattering [2,3] at high energy. The obtained cross section is finite by itself and a part of the full next-to-leading order result for the diffractive structure functions. We perform the calculation in exact kinematics in the eikonal limit, and show that the previously...
Go to contribution page -
Benjamin Haslum Hodkinson (University of Cambridge (GB))29/03/2023, 11:10
Hadronic object reconstruction is one of the most promising settings for cutting-edge machine learning and artificial intelligence algorithms at the LHC. In this contribution, selected highlights of ML/AI applications by ATLAS to particle and boosted-object identification, MET reconstruction and other tasks will be presented.
Go to contribution page -
Fernando Acosta (Lawrence Berkeley National Lab.), Fernando Torales Acosta (Lawrence Berkeley National Lab. (US))29/03/2023, 11:10
At leading order in positron-proton collisions, a lepton scatters off a quark through virtual photon exchange, producing a quark jet and scattered lepton in the final state. The total transverse momentum of the system is typically small, however deviations from zero can be attributed to perturbative initial and final state radiations in the form of soft gluon radiation when the transverse...
Go to contribution page -
Prof. liuti simonetta29/03/2023, 11:10
I will present a new interpretation of the deviations of the nuclear deep inelastic structure function from the free nucleon one, known as the nuclear EMC effect, based on the non locality of the hard scattering off the bound nucleon. Because of the extended size of the hard probe-quark interaction region, final state interactions between the struck parton and the bound nucleon remnants are...
Go to contribution page -
Cynthia Nunez (University of Michigan (US))29/03/2023, 11:10
Transverse Λ (uds) polarization observed over four decades ago contradicted expectations from early leading-order perturbative QCD calculations. Recent studies have linked the polarization to the process of hadronization, where hyperon polarization from unpolarized proton-proton and proton-nucleus collisions comes from either including higher-order twist-3 collinear multi-parton correlation...
Go to contribution page -
Jani Penttala (University of Jyväskylä (FI))29/03/2023, 11:30
The gluon density has been observed to increase rapidly with energy, which would eventually violate unitarity. At high energies, however, nonlinear effects start to become important, slowing down the evolution of the gluon density and hence giving rise to gluon saturation. To study this saturation region of QCD one possibility is to look at diffractive processes, as being approximately...
Go to contribution page -
Gary R Goldstein29/03/2023, 11:30
Spin dependent quark and gluon distributions can lead to distinctive features in the angular dependances and asymmetries of pp and ep scattering processes. Of particular interest are heavy quark production processes, wherein spin asymmetries of the heavy quarks, correlated with diquarks, adumbrate the underlying spin dependances. Heavy flavor hyperons with diquark spectators as well as top...
Go to contribution page -
Barak Schmookler (Stony Brook University), Claire Gwenlan (University of Oxford (GB)), Paul Richard Newman (University of Birmingham (GB)), Tyler Kutz29/03/2023, 11:30
Prospects for inclusive physics studies at the Electron-Ion Collider (EIC) using the EPIC detector are explored. EPIC is currently under rapid development and is expected to be operational from the first day of data taking. Simulations are used to determine the detector acceptance and resolutions, and to estimate some significant sources of systematic uncertainty such as backgrounds and...
Go to contribution page -
Fernando Acosta (Lawrence Berkeley National Lab.), Fernando Torales Acosta (Lawrence Berkeley National Lab. (US))29/03/2023, 11:30
The radiation pattern within high energy quark and gluon jets (jet substructure) is used extensively as a precision probe of the strong force as well as an environment for optimizing event generators for nearly all tasks in high energy particle and nuclear physics. While there has been major advances in studying jet substructure at hadron colliders, the precision achievable by collisions...
Go to contribution page -
Oleksandr Tomalak29/03/2023, 11:30
To describe low-energy (anti)neutrino fluxes in modern coherent elastic neutrino-nucleus scattering experiments as well as high-energy fluxes in precision-frontier projects such as the Enhanced NeUtrino BEams from kaon Tagging (ENUBET) and the Neutrinos from STORed Muons (nuSTORM), we evaluate (anti)neutrino energy spectra from radiative muon, pion, and kaon decays at O($\alpha$) level and...
Go to contribution page -
Siyuan Yan (University of Oxford (GB))29/03/2023, 11:30
Muon reconstruction performance plays a crucial role in the precision and sensitivity of the Large Hadron Collider (LHC) data analysis of the ATLAS experiment. Using di-muon Resonances we are able to calibrate to per-mil accuracy the detector response for muons. Innovative techniques developed throughout the Run-2 period and during the collider's shut-down significantly improve the measurement...
Go to contribution page -
Dr Weiyao Ke (Los Alamos National Laboratory)29/03/2023, 11:50
We perform a renormalization group (RG) analysis of cold nuclear matter effect on hadron production in semi-inclusive DIS. We focus on the asymptotic limit where the ratio $t = E/(\mu_D^2 L)\rightarrow \infty$, with $E$, $L$, $\mu_D$ being the energy of the jet, the nuclear size, and the inverse interaction range in cold nuclear matter, while the opacity of the medium remains at order unity....
Go to contribution page -
Dener De Souza Lemos (University of Illinois at Chicago (US))29/03/2023, 11:50
Presentation of the performance of the trigger system of the CMS experiment in Run 2 and the first year of Run 3 of the LHC.
Go to contribution page -
Lucian Harland-Lang (Durham University), Dr Lucian Harland-Lang (University of Oxford)29/03/2023, 11:50
In the high energy heavy ion collisions the ions can act as intense sources of electromagnetic radiation, or in the language of particle physics, photon-photon collisions. This is in particular the case for so--called ultraperipheral collisions (UPCs), where the impact parameter separation of the ions is significantly larger than the range of QCD, with the ions remaining intact after the...
Go to contribution page -
Stephen Maple, Stephen Maple, Stephen Maple29/03/2023, 11:50
A precise reconstruction of the kinematic variables $x$, $y$ and $Q^2$ is essential for the physics program at the future EIC. Conventional reconstruction methods usually rely on two of the four measured quantities (energy and angle of the scattered electron and hadronic final state) with the resolution of each method depending on the kinematic regime under study, detector performance, and...
Go to contribution page -
Anh-Dung Le (University of Jyväskylä)29/03/2023, 11:50
In this talk, we present numerical results on diffractive dissociation of virtual photon in the scattering off hadron. The calculation employs the dipole picture of diffractive deep inelastic scattering and solutions to nonlinear Kovchegov-Levin equation, taking into account the running coupling correction and a simple treatment of impact parameter dependence. The (generalized)...
Go to contribution page -
Matthew McEneaney29/03/2023, 11:50
Using the self-analyzing decay of the $\Lambda$, the longitudinal spin transfer $D_{LL'}$ to the hyperon from a polarized electron beam scattering off an unpolarized proton target can be determined. For $\Lambda$s produced in the current fragmentation region, this quantity is proportional to the helicity dependent fragmentation function $G_1^\Lambda$ and can provide insight into the spin...
Go to contribution page -
Dr Harleen Dahiya (Dr. B.R. Ambedkar National Institute of Technology, Jalandhar)29/03/2023, 12:10
The axial-vector form factors of the light, singly and doubly charmed baryons are investigated in the framework of $SU(4)$ chiral constituent quark model. The axial-vector form factors having physical significance correspond to the generators of the $SU(4)$ group with flavor singlet $\lambda^0$, flavor isovector $\lambda^3$, flavor hypercharge $\lambda^8$ and flavor charmed $\lambda^{15}$...
Go to contribution page -
Srecko Morovic (Univ. of California San Diego (US))29/03/2023, 12:10
The CMS experiment at CERN underwent several detector upgrades before the Large Hadron Collider (LHC) Run 3 started in 2022, delivering integrated proton collision luminosity of 38 fb-1 to CMS. LHC will continue with the planned proton-proton and lead ion collision programmes until the Run-3 concludes in 2025.
Go to contribution page
During High Luminosity operations (2029-2038), LHC is expected to deliver 3000 fb-1... -
Prof. Felix Ringer (ODU/JLab)29/03/2023, 12:10
In this talk, we explore machine learning-based jet and event identification at the future Electron-Ion Collider (EIC). We study the effectiveness of machine learning-based classifiers at relatively low EIC energies, focusing on (i) identifying the flavor of the jet and (ii) identifying the underlying hard process of the event. We propose applications of our machine learning-based jet...
Go to contribution page -
Marius Utheim29/03/2023, 12:10
General-purpose event generators such as Pythia are programs that model complete particle interactions, including the hard process, parton showers, multiparton interactions, hadronization, etc. The objective of these generators is to provide state-of-the-art predictions for high energy collisions, and are essential for bridging the gap between theoretical models and experimental data. Pythia...
Go to contribution page -
Bianka Meçaj (Yale University)30/03/2023, 09:00
Understanding the detailed structure of energy flow within jets, a field known as jet substructure, plays a central role in searches for new physics, and precision studies of QCD. Many applications of jet substructure require an understanding of jets initiated by heavy quarks, whose description has lagged behind remarkable recent progress for massless jets.
Go to contribution page
In this work we initiate a study of... -
Victor Martinez30/03/2023, 09:00
Generalized parton distributions (GPDs) are off-forward matrix elements of quark and gluon operators that work as a window to the total angular momentum of partons, making it possible to solve the spin puzzle that emerged after EMC measurements. In addition, GPDs enable tomography of the nucleon allowing to study spatial distribution of partons as a function of momentum, providing clear...
Go to contribution page -
Valerii Klimenko30/03/2023, 09:00
Electron scattering data off protons from the CLAS12 detector in Hall B at Jefferson Laboratory have become available and cover a wide kinematic range in W up to 2.5 GeV and Q2 up to 9 GeV2, offering new opportunities to explore inclusive, semi-inclusive, and fully exclusive reactions. A study that aims to extract the inclusive electroproduction cross sections from the CLAS12 data collected at...
Go to contribution page -
Michael David Sokoloff (University of Cincinnati (US))30/03/2023, 09:00
We present here the most recent $BABAR$ results on searches for new particles with masses below the electroweak scale predicted by many extensions of the Standard Model (SM). The results are based on the full data set of about 470 $\text{fb}^{-1}$ collected at the $\Upsilon(4S)$ resonance at the PEP-II collider, including a search for an Axion-Like Particle, $a$, produced in the...
Go to contribution page -
Richard Whitehill30/03/2023, 09:20
Since the EMC collaboration measurement of the small quark spin contribution to the proton spin in the late 1980s, the nuclear physics community has been actively working to resolve the so-called proton spin puzzle. While the size of the quark spin contribution is fairly well established, the gluon spin contribution is not as well established and recently has met theoretical tension. Recent...
Go to contribution page -
Whitney Armstrong30/03/2023, 09:20
Charge symmetry of the nucleon has been critically important in understanding the partonic structure of nuclei because halves the number of quark PDFs -- $u^p(x) = d^n(x)$ and $u^n(x) = d^p(x)$. Going back to the charge independence of the nuclear force, this symmetry is well founded, however, there are known sources of charge symmetry violation (CSV) such as the quark masses and...
Go to contribution page -
Xuan Li (Los Alamos National Laboratory)30/03/2023, 09:20
The proposed Electron-Ion Collider (EIC) will utilize high-luminosity high-energy electron+proton ($e+p$) and electron+nucleus ($e+A$) collisions to solve several fundamental questions including searching for gluon saturation and studying the proton/nuclear structure. Due to their high masses ($M_{c,b} > \Lambda_{QCD}$), heavy quarks do not transfer into other quarks or gluons once they are...
Go to contribution page -
Chris Meyer (Indiana University Bloomington)30/03/2023, 09:20
New light resonances are a generic signature of models of new phenomena beyond the Standard Model. The diphoton final states provides a clean final state and provides sensitivity to a wide class of such signals, in particular axion-like particles (ALPs). Several results of several such searches, both inclusive and in association with other particles, will be presented.
Go to contribution page -
Caroline Kathrin Riedl (Univ. Illinois at Urbana Champaign (US))30/03/2023, 09:20
In operation since 2002, COMPASS is a fixed-target experiment located along the M2 beamline of the CERN SPS. One of the key measurements of its broad physics programme is the investigation of the transverse-momentum and transverse-spin structure of the nucleon, which has been pursued e.g. via measurements of Semi-Inclusive Deep Inelastic Scattering using a 160 GeV/$c$ muon beam and...
Go to contribution page -
Prof. Nikolaos Kidonakis (Kennesaw State University)30/03/2023, 09:40
We present theoretical results for the associated production of a single top quark and a $Z$ boson ($tqZ$ production) at LHC energies. We calculate higher-order corrections from soft-gluon emission for this process. We compute the approximate NNLO (aNNLO) cross section at LHC energies, including uncertainties from scale dependence and from parton distributions. We also calculate the top-quark...
Go to contribution page -
Dr Chao Peng (Argonne National Laboratory), Chao Peng (Argonne National Laboratory), Chao Peng30/03/2023, 09:40
Solenoidal Large Intensity Detector (SoLID) is a large acceptance, high luminosity device proposed for exploiting the full potential of the Jefferson Lab 12 GeV energy upgrade. The scientific program of SoLID includes three semi-inclusive deep inelastic scattering (SIDIS) experiments with multiple run-group experiments. One of the major tasks of SoLID is to deepen our knowledge of the nucleon...
Go to contribution page -
Swagato Mukherjee30/03/2023, 09:40
An important physics program at the JLAB12 and EIC facilities is understanding the emergence of the masses and internal structures of Goldstone mesons, pion and kaon, through measurements of their electromagnetic form factors at large momenta transfers, $Q$. In this talk we will present first results of pion and kaon electromagnetic form factors up to $Q^2=10$ GeV$^2$ and $Q^2=30$ GeV$^2$,...
Go to contribution page -
Dr Enrico Lunghi (Indiana University)30/03/2023, 09:40
Lorentz and CPT symmetry in the quark sector of the Standard Model are studied in the context of an effective field theory using ZEUS ep data. Symmetry-violating effects can lead to time-dependent oscillations of otherwise time-independent observables, including scattering cross sections. An analysis using five years of inclusive neutral-current deep inelastic scattering events corresponding...
Go to contribution page -
Ted Rogers (Old Dominion University)30/03/2023, 09:40
I will summarize recent progress in a reformulation of TMD factorization that guarantees a parsonic structure description of the small transverse momentum region while matching to standard fixed order collinear factorization at large transverse momentum. The focus will be on applications to semi-inclusive DIS.
Go to contribution page -
Fanyi Zhao (UCLA)30/03/2023, 10:00
We study the energy-energy correlator (EEC) for the process of unpolarized hadrons production from transversely polarized partons Semi-Inclusive Deep Inelastic Scattering (SIDIS) for the first time. In the factorization formula we present, this event shape observable is correlated with the Collins function in the back-to-back limit. We show the structure functions of all the possible spin...
Go to contribution page -
Rakitha Beminiwattha, Rakitha Sanjeewa Beminiwattha30/03/2023, 10:00
abstract attached
Go to contribution page -
Jem Aizen Mendiola Guhit (University of Michigan (US)), Jem Guhit (University of Michigan)30/03/2023, 10:00
Many new physics models predict the existence of resonances decaying into two bosons (W, Z, photon, or Higgs bosons) making these important signatures in the search for new physics. Searches for Vy, VV, and VH resonances have been performed in various final states. In some of these searches, jet substructure techniques are used to disentangle the hadronic decay products in highly boosted...
Go to contribution page -
Ye Tian (Syracuse University)30/03/2023, 10:00
In this talk, we will provide an overview of future parity violation deep inelastic scattering (PVDIS) experiments by using the Solenoidal Large Intensity Device (SoLID) at Jefferson Lab (JLab) Hall A. We will obtain data with high statistic and large kinematic coverage for Bjorken $0.25<x<0.75$ and in the momentum transfer $2<Q^{2}<10$ (GeV/c)$^{2}$ range by a polarized electron beam...
Go to contribution page -
Terry Generet (RWTH Aachen University)30/03/2023, 10:00
In this talk, I will present NNLO QCD predictions for several differential distributions of B-hadrons in top-pair events at the LHC. In an extension of previous work, the decay of the produced B-hadron to a muon or a J/ψ meson has been incorporated, allowing us to make predictions for distributions involving those decay products as well. Additionally, a new set of B-hadron fragmentation...
Go to contribution page -
Ye Tian (Syracuse University)30/03/2023, 10:50
A precision measurement of inclusive neutron spin structure function $g_{2} (x,Q^{2})$, will be run in parallel with SIDIS experiments E12-010-006 (transversely polarized $^{3}$He target) and E12-11-007 (longitudinally polarized $^{3}$He target) by using a Solenoidal Large Intensity Device (SoLID) at Jefferson Lab (JLab) Hall A, as has been approved by JLab PAC48 in 2020. In the proposed...
Go to contribution page -
Arnaud Duperrin (CPPM, Aix-Marseille Université, CNRS/IN2P3 (FR))30/03/2023, 10:50
The identification of jets containing b-hadrons is key to many physics analyses at the LHC, including measurements involving Higgs bosons or top quarks, and searches for physics beyond the Standard Model. In this contribution, the most recent enhancements in the capability of ATLAS to separate b-jets from jets stemming from lighter quarks will be presented. The improved performance originates...
Go to contribution page -
Andrii Verbytskyi (Max Planck Society (DE))30/03/2023, 10:50
The high-x data from the ZEUS Collaboration are used to extract parton density distributions of the proton deep in the perturbative regime of QCD. The data primarily constrain the up-quark valence distribution and new results are presented on its x-dependence as well as on the momentum carried by the up-quark. The results were obtained using Bayesian analysis methods which can serve as a...
Go to contribution page -
Patrick Barry30/03/2023, 10:50
In this analysis, we report a comparison of transverse momentum dependent parton distribution functions (TMDPDFs) between pions and protons through a simultaneous extraction of collinear and transverse degrees of freedom in the pion. We extract proton TMDPDFs along with pion TMDPDFs from low transverse-momentum dependent fixed-target Drell-Yan data as well as collinear pion PDFs from Drell-Yan...
Go to contribution page -
Shivangi Prasad (Argonne National Laboratory)30/03/2023, 10:50
Measurement of near threshold quarkonia photoproduction cross section provides a unique tool to probe gluonic structure inside the nucleon, hence allowing extraction of gluonic form factors and mass radii. $J/\Psi$-007 experiment (E12-16-007) was conducted at Hall-C of the Thomas Jefferson National Accelerator Facility to measure near threshold 2-D differential $J/\Psi$ photoproduction cross...
Go to contribution page -
Elena Pompa Pacchi (Sapienza Universita e INFN, Roma I (IT)), Elena Pompa Pacchi (Roma I)30/03/2023, 10:50
Various theories beyond the Standard Model predict new, long-lived particles with unique signatures which are difficult to reconstruct and for which estimating the background rates is also a challenge. Signatures from displaced and/or delayed decays anywhere from the inner detector to the muon spectrometer, as well as those of new particles with fractional or multiple values of the charge of...
Go to contribution page -
Andrew Larkoski (UCLA), Simone Caletti30/03/2023, 11:10
An intuitive definition of the partonic flavor of a jet in quantum chromodynamics is often only well-defined in the deep ultraviolet, where the strong force becomes a free theory and a jet consists of a single parton. However, measurements are performed in the infrared, where a jet consists of numerous particles and requires an algorithmic procedure
Go to contribution page
to define their phase space boundaries. In... -
Lubomir Pentchev (Jefferson Lab)30/03/2023, 11:10
Exclusive charmonium photoproduction near threshold opens the door for studying the gluonic properties of the proton: gluonic GPDs, anomalous contribution to the mass of the proton, gravitational form factors, the mass radius of the proton. However, such an ambitious program requires precise measurements to validate the theoretical assumptions that relate the experimental results to the above...
Go to contribution page -
Vincent Andrieux (Univ. Illinois at Urbana Champaign (US))30/03/2023, 11:10
The investigation of the hadrons spin-(in)dependent structure is one of the main goals of the COMPASS experiment at the M2 beamline of the CERN SPS. In particular, azimuthal transverse spin asymmetries provide a clean access to the transverse momentum dependent parton distribution functions (TMD PDFs) of the nucleon, still poorly known. In 2015 and 2018 COMPASS performed measurements of the...
Go to contribution page -
Allison Mccarn Deiana (SMU)30/03/2023, 11:10
Leptoquarks are predicted by many new physics theories to describe the similarities between the lepton and quark sectors of the Standard Model and offer an attractive potential explanation for the B-physics anomalies observed at LHCb and flavour factories. The ATLAS experiment has a broad program of direct searches for leptoquarks, coupling to the first-, second- or third-generation particles....
Go to contribution page -
Sook Hyun Lee, sookhyun lee30/03/2023, 11:10
The Large Hadron-electron Collider and the Future Circular Collider in electron-hadron mode [1] will make possible the study of DIS in the TeV regime providing electron-proton collisions with per nucleon instantaneous luminosities around $10^{34}$ cm$^{-2}$s$^{-1}$. In this talk we will review the opportunities for measuring standard and anomalous top couplings, both to lighter quarks and to...
Go to contribution page -
Peter Risse30/03/2023, 11:10
We discuss the preliminary results of the new global nCTEQ23 nuclear PDF analysis, combining a number of our previous analyses into one consistent framework with updates to the underlying theoretical treatment as well as the addition of new available data. In particular, the nCTEQ23 global release will be the first nCTEQ release containing neutrino DIS scattering data in a consistent manner...
Go to contribution page -
Dr Kei Nagai (Los Alamos National Laboratory)30/03/2023, 11:30
The structure of the proton has been studied by measuring the parton distribution function, which is the parton density distribution as a function of the longitudinal momentum of the parton, for long time. In the last few decades, the three-dimensional imaging of nucleon, such as the transverse momentum dependent parton distribution functions (TMDs), has received attention to better understand...
Go to contribution page -
Jason P. Gombas (Michigan State University (US))30/03/2023, 11:30
The dependence of the top-quark mass measurement in top-quark production on the parton distribution functions (PDF) is explored through differential mass distributions in $t\bar{t}$ and $t\bar{t}j$ production at the LHC and a future 100 TeV proton-proton collider. The top-quark mass uncertainty is obtained from chi-squared fits to invariant mass distributions from simulations assuming...
Go to contribution page -
Alberto Accardi (Hampton U. and Jefferson Lab)30/03/2023, 11:30
We present the new CJ22 global QCD analysis of unpolarized parton distributions The work focuses on the light antiquark sea to incorporate constraints from recent SeaQuest and STAR electroweak boson production data. We make use of a more flexible antiquark imbalance parametrization than in the CJ15 analysis, that in turn is sensitive to mid-rapidity correlations between the $\bar d / \bar u$...
Go to contribution page -
Desmond Mzamo Shangase (University of Michigan (US))30/03/2023, 11:30
Investigating particle production in various collision systems has become in-
Go to contribution page
strumental in probing non-perturbative contributions to hadron structure and
hadronization. The LHCb spectrometer’s unique geometry among the LHC de-
tectors along with its particle identification and tracking capabilities allow for
new studies in hadron production to identify how said contributions manifest... -
Whitney Armstrong30/03/2023, 11:30
When beginning to describe the structure of $^4$He, one often begins by invoking a description based on nucleon degrees of freedom -- a bound system with two protons and two neutrons -- leaving the partonic description at the level of each nucleon aside. However, the ultimate goal to understand $^4$He within Quantum Chromodynamics (QCD)k is to connect its intrisic properties with the...
Go to contribution page -
Shun Watanuki30/03/2023, 11:30
Search for the lepton flavor violation and test of the lepton flavor universality are of great interest as a signature of the New Physics. Such decays can be searched using large amount of B and Upsilon mesons produced at Belle. We present our search for $B, B_s \to \ell\tau$, $B \to K\tau\ell$, $\Upsilon(nS) \to \ell\tau$. We also present our study on decays relevant to Lepton Flavor...
Go to contribution page -
Debaditya Biswas (Virginia Tech)30/03/2023, 11:50
Extractions of the structure functions from inclusive h(e,e′) and d(e, e′) reactions are important for the study of nucleon structure. Such extractions help with constraining the PDF (specially at large Bjorken X), facilitate the studies of Quark Hadron Duality and are important for non-singlet moments calculation as a test of LQCD and many more. Experiment E12-10-002 ran in Hall C at JLab in...
Go to contribution page -
Dr Kei Nagai (Los Alamos National Laboratory)30/03/2023, 11:50
One of the most important unresolved puzzles of the proton is the “proton spin puzzle”. Originally, the proton spin was assumed to be produced only by the valence quark spins, with no contribution from sea quarks or from gluons, and no contribution from orbital angular momentum. However, the contribution of the spins of both quarks and antiquarks to the proton spin have been measured over the...
Go to contribution page -
Roberta Volpe (Comenius University)30/03/2023, 11:50
In recent years, discrepancies from standard-model predictions, which suggest violation of lepton-flavor universality, have emerged in multiple measurements of B meson decays. This talk reports on related, recent Belle II results on lepton-flavour universality and long-lived particles.
Go to contribution page -
Andrea Ghira (Università degli studi di Genova)30/03/2023, 11:50
{Observables involving heavy quarks can be computed in perturbative QCD in two different approximation schemes: either the quark mass dependence is fully retained, or it is retained only where needed to regulate the collinear singularity. The two schemes have different advantages and drawbacks. In particular, it is known that the structure of large logarithms arising from soft emissions is...
Go to contribution page -
Dr Zhiwen Zhao (Duke University)30/03/2023, 11:50
for SoLID Collaboration
The proposed Solenoidal Large Intensity Device (SoLID) in Hall A at Jefferson Lab, will fully utilize the great physics potential of the 12-GeV energy upgrade by combining high luminosities and large acceptance to explore physics needs large statistics. We plan a common
Go to contribution page
setup to measure JPsi production near threshold, timeline compton scattering and double deeply... -
Nestor Armesto Perez (Universidade de Santiago de Compostela (ES))30/03/2023, 11:50
We review the status of the Large Hadron-electron Collider and the Future Circular Collider in electron-hadron mode after the publication of the update of the 2012 Conceptual Design Report in [1] and the studies on a joint $eh-hh$ interaction region and experiment in [2]. We also comment on the main technical challenges of these proposals and describe further steps of work towards the Update...
Go to contribution page -
Nestor Armesto Perez (Universidade de Santiago de Compostela (ES))30/03/2023, 12:00
The Large Hadron-electron Collider and the Future Circular Collider in electron-hadron mode [1] will make possible the study of DIS in the TeV regime providing electron-proton collisions with per nucleon instantaneous luminosities around $10^{34}$ cm$^{-2}$s$^{-1}$. We review the possibilities for detection of physics beyond the SM in these machines, focusing on feebly interacting particles...
Go to contribution page -
Davide Napoletano (Universita & INFN, Milano-Bicocca (IT))30/03/2023, 12:10
In this talk I will present a recent idea for which one could use the deadcone, a region suppressed by QCD in vacuum to massive kinematic effects, to measure properties of the Quark-Gluon-Plasma, due to in-medium enhancements for massive emitters.
Go to contribution page -
Patrick Barry30/03/2023, 12:10
A renewed attention has spawned in recent years to the pion parton distribution functions (PDFs). In 2018, the JAM collaboration included not only the pion-induced Drell-Yan data from Fermilab’s E615 experiment but additionally the leading neutron electroproduction data from HERA for the first time in a global QCD analysis. Unfortunately, further useful experimental data have been scarce. With...
Go to contribution page -
Tanjona R. Rabemananjara (NIKHEF & VU Amsterdam)30/03/2023, 12:10
The precision-level reached at collider experiments offer us the unique opportunity to probe the inner structure of the protons and heavy nuclei, described in the language of parton density functions (PDFs), at an unprecedented accuracy. Despite that current determination of the proton PDFs account for nuclear effects and reciprocally the determination of the nuclear PDFs (nPDFs) depend on the...
Go to contribution page -
Anamika Aggarwal (Johannes Gutenberg Universitaet Mainz (DE))30/03/2023, 12:10
With the pp collision dataset collected at 13 TeV, detailed measurements of Higgs boson properties can be performed. The Higgs kinematic properties can be measured with increasing granularity, and interpreted to constrain beyond-the-Standard-Model phenomena. This talk presents the measurements of Higgs boson differential and fiducial cross sections with various decay modes, as well as their...
Go to contribution page -
Zhoudunming Tu30/03/2023, 12:10
One of the golden measurements at the Electron-Ion Collider (EIC) is to measure the coherent diffractive Vector Meson (VM) production on a heavy-nucleus target. The measurement is expected to be sensitive to the non-linear gluon dynamics - saturation, and most importantly, it also provides the gluon density distribution of the nucleus. While the measurement was proposed in the EIC White Paper...
Go to contribution page -
Dillon Scott Fitzgerald (University of Michigan (US))30/03/2023, 12:10
Understanding the spin structure of the proton is of large interest to the nuclear physics community and it is one of the main goals of the spin physics program at the Relativistic Heavy Ion Collider (RHIC). Measurements from data taken by the PHENIX detector with transverse (p$^{\uparrow}$ + p, p$^{\uparrow}$ + Al, p$^{\uparrow}$ + Au) proton polarization play an important role in this, in...
Go to contribution page -
Andreas Metz30/03/2023, 14:00
We propose a new definition of unintegrated di-hadron fragmentation functions (DiFFs) which is compatible with the probability interpretation of collinear DiFFs. We also derive the leading-order evolution equations for those DiFFs. Furthermore, we compare our findings in detail with previous results in the literature. Unintegrated DiFFs are important for obtaining information on the...
Go to contribution page -
Wenqing Fan (Lawrence Berkeley National Lab. (US))30/03/2023, 14:00
The future electron-ion collider (EIC) will provide the first electron-nucleus collisions for a variety of nuclei species with high luminosity, wide kinematic coverage, and excellent detector resolution, providing new insights into cold nuclear matter effects and transport phenomena. As jets are an accurate proxy of the struck quark that traverses the nucleus, the signature of the nuclear...
Go to contribution page -
Robin Caron (Centre National de la Recherche Scientifique (FR))30/03/2023, 14:00
Charmonium is one of the most prominent probes used to investigate and quantify the properties of the quark-gluon plasma (QGP) created in ultra-relativistic heavy-ion collisions. Thanks to its larger size and weaker binding energy, the excited $\psi$(2S) state is expected to be affected differently by the nuclear medium with respect to the J/$\psi$ state, therefore the effects of nuclear...
Go to contribution page -
John Stupak (The University of Oklahoma)30/03/2023, 14:00
The presence of a non-baryonic Dark Matter (DM) component in the Universe is inferred from the observation of its gravitational interaction. If Dark Matter interacts weakly with the Standard Model (SM) it could be produced at the LHC. The ATLAS Collaboration has developed a broad search program for DM candidates in final states with large missing transverse momentum produced in association...
Go to contribution page -
K. Utku Can (The University of Adelaide)30/03/2023, 14:00
The structure of hadrons relevant for deep-inelastic scattering are completely characterised by the Compton amplitude. A direct calculation of the Compton amplitude provides a complementary way to accessing the structure functions, circumventing the operator mixing and renormalisation issues of the standard operator product expansion approach.
In this talk, we focus on the QCDSF/UKQCD...
Go to contribution page -
Igor Korover30/03/2023, 14:20
Generalized Parton Distributions (GPDs) open a new avenue in our understanding of nucleon structure that may shed light on many properties of the nucleon such as spin, mass and 3D images of a completely relativistic QCD system. This is achieved by measuring both transverse and longitudinal properties of the nucleon simultaneously. Extraction of GPDs presents a formidable experimental...
Go to contribution page -
Marcel Rodekamp30/03/2023, 14:20
Studying the structure of Nucleons in Quantum Chromodynamics is a challenging task due to the appearance of non-perturbative Parton Distribution Functions (PDF).
Go to contribution page
PDFs describe the distributions of quarks and gluons with respect to the longitudinal momentum and appear in cross-sections as process-independent contributions.
Lattice QCD provides the possibility to study these by calculating... -
Spencer Robert Klein (Lawrence Berkeley National Lab. (US))30/03/2023, 14:20
The Good-Walker paradigm is widely used for studying ultra-peripheral collisions (UPCs) and underlies much of the exclusive photoproduction/electroproduction program at the future electron-ion collider (EIC). It relates the cross-section for coherent photoproduction, $d\sigma/dt$ to the transverse distribution of scattering centers in a target, and ties the incoherent cross-section to...
Go to contribution page -
Gauthier Legras (Westfaelische Wilhelms-Universitaet Muenster (DE))30/03/2023, 14:20
The production of quarkonium, a bound state of a heavy quark (charm or bottom) and its corresponding antiquark, can be decomposed in a hard-scale perturbative production of the quark-antiquark pair, and its subsequent hadronization into the bound state which can only be described by non-perturbative models, such as NRQCD. In hadronic collisions, the underlying event activity, usually...
Go to contribution page -
Francesco Giuseppe Gravili (University of Salento)30/03/2023, 14:20
Supersymmetry (SUSY) provides elegant solutions to several problems in the Standard Model, and searches for SUSY particles are an important component of the LHC physics program. This talk will present the latest results from SUSY searches conducted by the ATLAS experiment. The searches target multiple final states and different assumptions about the decay mode of the produced SUSY particles,...
Go to contribution page -
Christopher Cocuzza (Temple University)30/03/2023, 14:20
We perform the first simultaneous extraction of di-hadron fragmentation functions (DiFFs) and transversity PDFs using data from single-inclusive annihilation (SIA) in electron-positron collisions, semi-inclusive DIS, and proton-proton collisions. In particular, we include new SIA data from Belle that provides, for the first time, experimental constraints on the unpolarized DiFFs, as well as...
Go to contribution page -
Prof. Daniel Tapia Takaki (University of Kansas)30/03/2023, 14:40
Photon-induced reactions in ultra-peripheral collisions (UPCs) of heavy nuclei at the LHC have been studied using the ALICE detector for several years. The ALICE detector can measure the photoproduction cross section for vector mesons at various rapidities, centre-of-mass energies and
Go to contribution page
collision systems. Beyond the recent ALICE studies of the rapidity and momentum transfer dependence of... -
Anna Maria Stasto (Pennsylvania State University (US)), Nestor Armesto Perez (Universidade de Santiago de Compostela (ES)), Paul Richard Newman (University of Birmingham (GB))30/03/2023, 14:40
Inclusive Diffractive Deep Inelastic Scattering ($ep \rightarrow eXp$) is mediated by the $t$-channel exchange of net-colourless strongly interacting objects related to mesons and to the pomeron. The high performance beam-line proton spectrometers and central detector components that are included in detector designs for the future Electron Ion Collider will lead to measurements of this process...
Go to contribution page -
2. Gluon Parton Distribution of the Nucleon from Lattice QCD in the $2+1+1$ Physical-Continuum LimitWilliam Good (Michigan State University)30/03/2023, 14:40
We present the first physical-continuum limit $x$-dependent nucleon gluon distribution from lattice QCD using the pseudo-PDF approach, on lattice ensembles with $2+1+1$ flavors of highly improved staggered quarks (HISQ), generated by MILC Collaboration. We use clover fermions for the valence action on three lattice spacings $a \approx 0.9$, 0.12 and 0.15~fm and three pion masses $M_\pi \approx...
Go to contribution page -
Babu Pokhrel (Temple University)30/03/2023, 14:40
The transversity distribution function, $h_1^{q}(x)$, where $x$ is the longitudinal momentum fraction of the proton carried by quark $q$, encodes the proton's transverse spin structure at the leading twist. Extraction of $h_1^{q}(x)$ is difficult because of its chiral-odd nature. However, it can be coupled with a spin-dependent interference fragmentation function (FF), $H_1^{\sphericalangle,...
Go to contribution page -
Alessandro Boschetti30/03/2023, 14:40
Belle II offers unique possibilities for discovering and interpreting exotic multiquark bound states to probe the fundamentals of QCD. This talk presents recent results on a unique data set collected at energies above the $\Upsilon$(4S), including searches for the hidden bottom transition between Y(10750) and $\chi_{bJ}$.
Go to contribution page -
Shiyi Liang (IHEP)30/03/2023, 14:40
A new search for supersymmetry targeting pair production of squarks or gluinos decaying to sleptons or W, Z with final stated with either two leptons (electrons or muons) with the same electric charge or at least three leptons is presented. The analysis uses 139 fb-1 of pp collision data at 13 TeV collected with the ATLAS detector during Run 2 of the Large Hadron Collider, and simplified...
Go to contribution page -
Abdennacer Hamdi (Lawrence Berkeley National Lab. (US))30/03/2023, 15:00
High energy photons originating from the electromagnetic field of ultrarelativistic lead nuclei can interact with the other lead beam. These reactions are studied in the ultra-peripheral heavy ion collisions to probe the physics of strong interactions. The analysis of dipion and dikaon photoproduction was carried out using the ALICE 2015 Pb-Pb data at center-of-mass energy $\sqrt{s_{NN}}=5.02$...
Go to contribution page -
Kai Yi (Tsinghua University (CN))30/03/2023, 15:00
This talk presents recent results about heavy flavor spectroscopy and exotic hadrons at CMS.
Go to contribution page -
Dr Andrew Hanlon (Brookhaven National Laboratory)30/03/2023, 15:00
Parton distribution functions (PDFs) are defined from matrix elements of operators separated along the light cone, which cannot be determined directly from calculations performed in Euclidean space. Despite this, various approaches for extracting information on PDFs from lattice QCD have been developed, all of which involve a factorization of the lattice QCD computed matrix element with...
Go to contribution page -
Kaan Simsek30/03/2023, 15:00
The EIC's high luminosity, wide kinematic coverage, availability of proton and isoscalar deuteron targets, and ability to polarize both the lepton and hadron beams, allows for unique opportunities for precision tests of the electroweak sector of the Standard Model and constraining beyond the Standard Model physics in a manner that complements efforts at the LHC and low energy experiments. In...
Go to contribution page -
Christophe Royon (The University of Kansas (US)), Christophe Royon (University of Kansas)30/03/2023, 15:00
The Precision Proton Spectrometer (PPS) is a new subdetector of CMS introduced for the LHC Run 2 and will continue to operate during LHC Run 3. PPS provides a powerful tool for the advancement of BSM searches. The talk will present recent results obtained with the PPS subdetector illustrating the unique sensitivity achieved using proton tagging.
Go to contribution page -
Navagyan Ghimire30/03/2023, 15:00
Quarks that are transversely polarized inside a transversely polarized nucleon are described by the transversity distribution, $h^q_{1}(x)$. Since $h^q_{1}(x)$ is a chiral-odd function, the only way to access it is through a process where it couples to another chiral-odd function, such as the spin-dependent interference fragmentation function (IFF) in $p^{\uparrow}p$ collisions. The coupling...
Go to contribution page -
Katherine Parham (Duke University)30/03/2023, 15:20
The Belle experiment at the asymmetric e+e- collider KEKB provides a large data set not only for the exploration of flavor physics but also for precision QCD studies. The clean initial state is particularly well suited to investigate the process of high-energetic partons fragmenting into final state hadrons. This talk will report the results of recent measurements sensitive to fragmentation...
Go to contribution page -
Peter Alan Steinberg30/03/2023, 15:20
Relativistic heavy-ion beams at the LHC are accompanied by a large flux of equivalent photons, leading to multiple photon-induced processes. This talk presents a series of measurements of dilepton production from photon fusion performed by the ATLAS Collaboration. Recent measurements of exclusive dielectron production in ultra-peripheral collisions (UPC) are presented. These processes provide...
Go to contribution page -
Rene Poncelet (Cambridge University)30/03/2023, 15:20
Multi-jet rates at hadron colliders provide a unique possibility for probing Quantum Chromodynamics (QCD), the theory of strong interactions. By comparing theory predictions with collider data, one can directly test perturbative QCD, extract fundamental parameters like the strong coupling and search for physics beyond the Standard Model. Recent developments enabled lifting three-jet...
Go to contribution page -
Nicole Lewis (Brookhaven National Laboratory)30/03/2023, 15:20
Baryon number is a strictly conserved quantity in QCD. Conventionally it is assumed to be split between the three valence quarks, but the baryon junction has also been proposed as a way of constructing a gauge-invariant baryon wave function. The baryon junction is a nonperturbative Y-shaped configuration of gluons that is connected to all three valence quarks and carries the baryon number. ...
Go to contribution page -
Christopher Dilks30/03/2023, 15:20
Measurements in semi-inclusive deep inelastic scattering provide a wide range
Go to contribution page
of insights into nucleon structure and hadronization. Spin asymmetries and
cross sections in single-hadron and dihadron production are sensitive to
various combinations of transverse momentum-dependent (TMD) distribution and
fragmentation functions, depending on the polarizations of the initial electron
and... -
Dr Jack Holligan (University of Maryland)30/03/2023, 15:20
We present a lattice QCD calculation of the unpolarized isovector quark parton distribution function (PDF) of the proton utilizing a perturbative matching at next-to-next-leading-order (NNLO). The calculations are carried out using a single ensemble of gauge configurations generated with $N_f$ = 2+1 highly improved staggered quarks with physical masses and a lattice spacing of a =0.076 fm. We...
Go to contribution page -
Klaudia Maj (Krakow AGH-UST)30/03/2023, 15:40
Relativistic heavy-ion beams at the LHC are accompanied by a large flux of equivalent photons, leading to multiple photon-induced processes. This talk presents searches for physics beyond the standard model enabled by photon-photon processes in both di-tau and di-photon final states. The tau-pair production measurements can constrain the tau lepton's anomalous magnetic dipole moment (g-2), and...
Go to contribution page -
Zhoudunming Tu (University of Kansas (US)), Zhoudunming Tu, Dr Zhoudunming Tu (BNL)30/03/2023, 15:40
Exclusive coherent and incoherent \jpsi photoproduction in Au$+$Au ultra-peripheral collisions (UPC) are measured at
Go to contribution page
$\sqrt{s_{_\mathrm{NN}}}=200$ GeV using the STAR detector.
Measurements of the differential cross sections as functions of rapidity $y$ and \ptSquare $\approx -t$ of the $J/\psi$ are reported.
Results for different combinations of neutron emission, detected in zero degree... -
Prof. Raúl Briceño (UC Berkeley / LBNL)30/03/2023, 15:40
The fact that lattice QCD is defined in a finite-Euclidean spacetime, prohibits direct access of inclusive scattering observables from lattice QCD. In principle, one can envision determining such quantities from real-time computations, such as those that may be eventually performed using quantum computers. Looking forward into the future, in this talk I outline a possible pathway towards...
Go to contribution page -
Sook Hyun Lee, sookhyun lee30/03/2023, 15:40
The Large Hadron Collider beauty (LHCb) experiment provides an opportu-
Go to contribution page
nity to study hadronization processes, how particular hadrons are formed from scattered quarks and gluons (partons), in the forward region, 2 < η < 5. Going beyond traditional collinear non-perturbative fragmentation functions (FFs), transverse-momentum-dependent (TMD) FFs provide multidimensional information on the... -
Sebastian Piotr Sapeta (Polish Academy of Sciences (PL)), Sebastian Sapeta, Sebastian Sapeta30/03/2023, 15:40
I shall discuss complete calculation of one-loop triple-collinear splitting operators in QCD for all five channels. The results are accurate to second order in dimensional-regularization parameter. This accuracy is sufficient for use in subtraction schemes at next-to-next-to-next-to leading order.
Go to contribution page -
Aleksandr Bylinkin (University of Bergen (NO)), Alexander Bylinkin (ITEP)30/03/2023, 15:40
In this talk, we will discuss the physics prospects of photon-induced measurements using the high granularity FoCal detector to be installed at the ALICE experiment, covering the pseudorapidity interval $3.4 \leq \eta \leq 5.8$. This new detector, scheduled to be in operation from Run 4, will explore the small Bjorken-$x$ physics region in an unprecedented way. In this region the gluon...
Go to contribution page -
Sanjin Benić30/03/2023, 16:30
In this contribution I would like to present our recent computation of exclusive eta_c production in e+p and e+A collisions [1] in the Color Glass Condensate framework. While the original suggestion for this channel as a potential probe of the QCD odderon [2] was made some time ago [3], obtaining a realistic estimate for the cross section remains a challenge. A recent attempt at moderate-x was...
Go to contribution page -
Vladimir Rekovic (Vinca, University of Belgrade (RS) / CERN.)30/03/2023, 16:30
The High-Luminosity Large Hadron Collider (HL-LHC) is expected to deliver an integrated luminosity of up to 3000 fb-1. The very high instantaneous luminosity will lead to about 200 proton-proton collisions per bunch crossing (“pileup”) superimposed to each event of interest, therefore providing extremely challenging experimental conditions. Prospects for SM measurements and searches for beyond...
Go to contribution page -
Yewon Yang, Yewon Yang (Deutsches Elektronen-Synchrotron (DE))30/03/2023, 16:30
This talk presents recent results about heavy flavor production at CMS.
Go to contribution page -
TOMMASO RAINALDI (Old Dominion University)30/03/2023, 16:30
Factorization theorems have long been a successful and elegant tool to describe and interpret hadronic structure. The early parton model picture, first developed by Feynman, has now been generalized past the leading power description of inclusive processes like deep inelastic scattering (DIS) to semi-inclusive ones like SIDIS and much more. However, a consistent description of both collinear...
Go to contribution page -
Matteo Cerutti (University of Pavia and INFN)30/03/2023, 16:30
We present the latest results of the MAP collaboration about the extraction of Transverse-Momentum-Dependent (TMD) distributions at the N$^3$LL logarithmic accuracy in the resummation of q$_T$-logarithms. Firstly, we present the most recent extraction of unpolarized quark TMD parton distribution functions (TMD PDFs) in the proton and fragmentation functions (TMD FFs) from a global fit of...
Go to contribution page -
Ishara Fernando (University of Virginia)30/03/2023, 16:50
Artificial Neural Networks (ANNs) are quickly becoming an invaluable tool for information extraction and modeling. An unbiased ANN model can be built to make predictions of the Transverse Momentum-dependent Distributions (TMDs) based on global fit to Semi Inclusive Deep Inelastic Scattering (SIDIS) and Drell-Yan (DY) data. A preliminary analysis will be presented on the extraction of the...
Go to contribution page -
Haowu Duan30/03/2023, 16:50
We provide the first calculation of two-gluon production at mid-rapidity in ultra-peripheral collisions in the Color Glass Condensate framework. To estimate systematic uncertainty associated with poor understanding of the wave function of the nearly real photon, we consider two diametrically different models: the dilute quark-antiquark dipole approximation and a
Go to contribution page
vector meson, in which... -
Alessandro Ratti30/03/2023, 16:50
The production of heavy quarks at the LHC plays a crucial role in the context of precision tests of the Standard Model and the search for new physics. On top of representing a fundamental background for a huge number of processes, heavy quarks can play an important role in constraining Parton Distribution Functions, especially the gluon PDF, in relevant low x regions. Therefore it is essential...
Go to contribution page -
Dr Francesco Giuli (CERN)30/03/2023, 16:50
The Large Hadron-electron Collider and the Future Circular Collider in electron-hadron mode [1] will make possible the study of DIS in the TeV regime providing electron-proton collisions with per nucleon instantaneous luminosities around $10^{34}$ cm$^{-2}$s$^{-1}$. In this talk we review the opportunities that these proposals offer for the determination of the structure of the proton. The...
Go to contribution page -
16. Renormalization of twist-two operators and its application to singlet splitting functions in QCDTongzhi Yang (University of Zurich)30/03/2023, 16:50
The splitting functions determine the scaling violations of deep-inelastic scattering structure functions and govern the evolution of Parton densities. A determination of N3LO Parton densities requires the knowledge of 4-loop splitting functions. It is important to find efficient methods to compute 4-loop splitting functions. The method of computing the off-shell matrix elements with a...
Go to contribution page -
Yong Zhao30/03/2023, 17:10
The transverse-momentum-dependent parton distributions (TMDs) provide a 3D imaging of the proton and other hadrons in high-energy scattering experiments, such as those at Fermilab, Jefferson Lab, RHIC and LHC. Recent years have seen significant progress in the global fitting of TMDs from experiments, and along with that is a lattice QCD program aiming at first-principles calculation of these...
Go to contribution page -
Anna Maria Stasto (Pennsylvania State University (US)), Anna Stasto, Anna Stasto30/03/2023, 17:10
The Large Hadron-electron Collider and the Future Circular Collider in electron-hadron mode [1] will make possible the study of DIS in the TeV regime providing electron-proton (nucleus) collisions with per nucleon instantaneous luminosities around $10^{34}$ ($10^{33}$) cm$^{-2}$s$^{-1}$. In this talk we will review how the study of diffraction, both inclusive and exclusive, will provide...
Go to contribution page -
Valeri Pozdniakov (University of Kansas)30/03/2023, 17:10
Photonuclear interactions are studied in ultra-peripheral p-Pb collisions with the ALICE experiment, where the photon radiated by a Pb nucleus probes the gluon density of the proton at low Bjorken-x. The exclusive J/𝜓 photoproduction cross section 𝜎(𝛾+𝑝→𝐽/𝜓+𝑝) is expected to follow a power law trend as x decreases, but it should deviate from this trend at low x due to gluon saturation. In...
Go to contribution page -
Kay Schönwald (University of Zuerich)30/03/2023, 17:10
In this talk we discuss on recent result on massless and massive Wilson
Go to contribution page
coefficients in the polarized and unpolarized case up to 3-loop order.
This includes the gluonic massive operator matrix element $A_{gg}$
which enters the definition of the Variable-Falvor-Number-Scheme, and the
calculation of the unpolarized and polarized massless Wilson coefficients.
While the calculation of the... -
Prof. David Brown30/03/2023, 17:10
The measurement of exclusive $e^+e^−$ to hadrons processes is a significant part of the physics program of the $BABAR$ experiment, aimed to improve the calculation of the hadronic contribution to the muon $g−2$ and to study the intermediate dynamics of the processes. We present the most recent studies performed on the full data set of about 470 ${\mathrm {fb}}^{−1}$ collected at the PEP-II...
Go to contribution page -
Dr Andrea Pelloni (Nikhef)30/03/2023, 17:30
We have calculated the $n_f^2$ and $n_f^3$ contributions to the flavour non-singlet structure functions $F_2$ and $F_L$ in inclusive deep-inelastic scattering at the fourth order in the strong coupling $\alpha_s$. The coefficient functions have been obtained by computing a very large number of Mellin-N moments using the method of differential equations, and then determining the analytic forms...
Go to contribution page -
Claire Gwenlan (University of Oxford (GB))30/03/2023, 17:30
The Large Hadron-electron Collider and the Future Circular Collider in electron-hadron mode [1] will make possible the study of DIS in the TeV regime providing electron-proton (nucleus) collisions with per nucleon instantaneous luminosities around $10^{34}$ ($10^{33}$) cm$^{-2}$s$^{-1}$. In this talk we review the opportunities for the determination of the nuclear parton structure at small $x$...
Go to contribution page -
Andre Sopczak (Czech Technical University in Prague (CZ))30/03/2023, 17:30
We describe the status of the ATLAS Forward Proton Detectors (AFP) in Run 2 and the outlook for Run 3 analyses.
Go to contribution page
The performance as well as Run 3 improvements of detector subsystems are discussed in detail. This includes the Tracking and Time-of-Flight Detectors, the electronics, the trigger, the readout, detector control and data quality monitoring.
Additionally, key physics results from the... -
John Terry (LANL)30/03/2023, 17:30
In this talk, I will present our recent work on transverse momentum dependent factorization and resummation at sub-leading power in Drell-Yan and semi-inclusive deep inelastic scattering. In these processes the sub-leading power contributions to the cross section enter as a kinematic power correction in the leptonic tensor, and the kinematic, intrinsic, and dynamic sub-leading contributions to...
Go to contribution page -
Dr Harleen Dahiya (Dr. B. R. Ambedkar National Institute of Technology, Jalandhar 144027, India)30/03/2023, 17:50
In the light-front quark-diquark model (LFQDM), the higher twist generalized transverse momentum dependent distribution (GTMD) $F_{31}(x, {\bf p_\perp^2},{\bf \Delta_\perp^2})$ for the proton has been analyzed. We have derived the GTMD overlap equation by the analysis of GTMD correlator, employing the light-front wave functions in both the scalar and vector diquark situations. With the...
Go to contribution page -
Justin Cammarota (William & Mary)30/03/2023, 17:50
The factorization theorem plays an important role in the analysis of high energy quantum chromodynamic (QCD) processes, separating the nonperturbative hadronic interaction into the universal parton distribution functions (PDFs) and fragmentation functions (FFs) and the process-dependent interactions into short distance perturbative calculations, with any interference power suppressed. With a...
Go to contribution page -
Peter John Bussey (University of Glasgow (GB)), Peter John Bussey (University of Glasgow (GB))30/03/2023, 17:50
The purpose of the ALFA detector is to measure protons scattered at very small angles. ALFA aims to study elastic and diffractive events, exclusive production and photon-induced interactions. In LHC Run 2, ALFA participated in the ATLAS high-luminosity data taking, as well as, special runs with reduced luminosity and dedicated optics.
Go to contribution page
This report presents the status of the ALFA detector... -
elke-caroline Aschenauer31/03/2023, 09:00
Understanding the properties of nuclear matter and its emergence through the underlying partonic structure and dynamics of quarks and gluons requires a new experimental facility in hadronic physics known as the Electron-Ion Collider (EIC). The EIC will address some of the most profound questions concerning the emergence of nuclear properties by precisely imaging gluons and quarks inside...
Go to contribution page -
Michaela Mlynarikova (CERN)31/03/2023, 09:30
The large dataset of about 3 ab-1 that will be collected at the High Luminosity LHC (HL-LHC) will be used to measure Higgs boson processes in detail. Studies based on current analyses have been carried out to understand the expected precision and limitations of these measurements. The large dataset will also allow for better sensitivity to di-Higgs processes and the Higgs boson self coupling....
Go to contribution page -
Aurore Courtoy (Instituto de Física, UNAM), Aurore Courtoy (IFPA), Claire Gwenlan (University of Oxford (GB)), Simone Amoroso (Deutsches Elektronen-Synchrotron (DE))31/03/2023, 10:00
-
Feng Yuan, Sylvester Joosten (Temple University), Sylvester Joosten31/03/2023, 10:25
-
Doreen Wackeroth, Doreen Wackeroth (SUNY Buffalo), Niki Saoulidou (National and Kapodistrian University of Athens (GR)), Wouter Deconinck31/03/2023, 11:20
-
Dr Barbara Antonina Trzeciak (Czech Technical University in Prague), Pierre-Hugues Beauchemin (Tufts University (US)), Pierre-Hugues Beauchemin (Tufts University (US)), Rene Poncelet (Cambridge University)31/03/2023, 11:45
-
Caroline Kathrin Riedl (Univ. Illinois at Urbana Champaign (US)), Caroline Riedl (HERMES, DESY), Jakub Wagner, Jakub Wagner (Institute for Nuclear Studies), Jim Drachenberg, Jim Drachenberg, Jim Drachenberg, Dr Jim Drachenberg (Abilene Christian University)31/03/2023, 12:10
-
Alexander Savin (UW), Alexander Savin (University of Wisconsin Madison (US)), Claudia Gemme (Universita degli Studi di Genova Dipart. di Fisica), Claudia Gemme (INFN Genova (IT)), Kondo Gnanvo (Southeastern Universities Research Association, Inc. (US))31/03/2023, 12:35
-
Maarten Boonekamp (CEA/Saclay), Maarten Boonekamp (Université Paris-Saclay (FR))31/03/2023, 14:15
Experimental and theoretical aspects of current W boson mass, status and future prospects for theory calculations and measurements.
Go to contribution page -
Daniel De Florian (International Center for Advanced Studies (AR)), Daniel De Florian, Daniel De Florian (Laboratorio de Fisica Teorica Departamento de Fisica), Daniel de Florian (Universidad de Buenos Aires)31/03/2023, 14:45
One of the main tasks for modern QCD theory for colliders is to provide computations of the short-distance factors (typically, partonic cross sections) at high orders of perturbation theory. The past two decades have seen tremendous progress on the development of the theoretical framework needed to match the accuracy reached by the experiments. In this talk I will review the status and latest...
Go to contribution page -
Paul Richard Newman (University of Birmingham (GB))31/03/2023, 15:15
-
Huey-Wen Lin31/03/2023, 15:30
-
Arjun Kumar (Indian Institute of Technology Delhi)
The hotspot model has proven to be an efficient tool to study coherent and incoherent diffraction HERA data by modeling the initial state fluctuations of the gluon density of the proton. The hotspot model in its original form is a non-perturbative model applicable for low momentum transfer and underestimates the incoherent cross section in orders of magnitude when extended for large momentum...
Go to contribution page -
Simone Amoroso (Deutsches Elektronen-Synchrotron (DE))
With the recent computation of cross-section calculations up to the third order in perturbative QCD, and the appearance of the first PDF fits at N3LO (albeit only approximately), it becomes interesting to study if the improved precision is accompanied by an analogue improvement in accuracy in describing experimental data.
To this aim, we calculated the theoretical total cross-sections for...
Go to contribution page -
Darin Acosta (Rice University (US))
The development of a TeV-scale muon-ion collider opens up a new regime for deep inelastic scattering measurements as well as facilitates searches for beyond Standard Model physics. In this talk we report on the kinematics and resolution for DIS processes when a TeV muon beam is collided with a high energy hadron beam, as well as on the expected statistical uncertainties in F2 structure...
Go to contribution page -
Yen-Jie Lee (Massachusetts Institute of Technology), Yu-Chen (Janice) Chen (Massachusetts Institute of Technology)
The first measurement of two-particle angular correlations of charged particles emitted in high energy $e^+e^-$ annihilation up to $\sqrt{s} = 209$~GeV is presented, using data collected with the ALEPH detector at LEP between 1992 and 2000. The correlation functions are measured over a broad range of pseudorapidity and full azimuth as a function of charged particle multiplicity for the first...
Go to contribution page
Choose timezone
Your profile timezone: