23+2'
Interactions of high-energy neutrinos with matter can be studied through the angular separation observed in dimuon production, an observable particularly sensitive to the transverse momentum dynamics of partons. In this work, we develop a Monte Carlo event generator based on the color dipole model, interfaced with Pythia8 for parton showering and hadronization simulations, to predict...
18+2'
In this work we discuss the possibility of accessing the initial geometric shape of the proton in proton-nucleus collisions at the LHC. More specifically, we want to test the configuration in which the proton is made of three quarks linked by a Y-shape gluon string, called baryon junction. This initial state spatial configuration has been used in the past to describe data on baryon...
18+2'
The effective cross section of double parton scattering in high-energy hadron collisions has been measured in proton--proton collisions, with significant variation among final-state observables, contrary to the idea of a universal value. Building upon our previous work, we incorporate the dependence on the parton longitudinal momentum fraction x and the process energy hard scale μ into...
23+2'
We present new parton distribution functions (PDFs) at next-to-leading order (NLO) and
next-to-next-to-leading order (NNLO) in perturbative QCD, derived from a comprehensive QCD analysis
of high-precision data sets from combined HERA deep-inelastic scattering (DIS),
the Tevatron, and the Large Hadron Collider (LHC). To improve constraints on quark
flavor separation, we...
I will review the calculation of parton distribution functions of meson derived from either light-front wave functions or from a cut diagram based on the optical theorem applied to Compton scattering. The latter approach can also be used to compute an elementary fragmentation for the case of a quark into a meson. However, there is no reason a high-energy quark should fragment into just one...
18+2'
The inclusive $D^0$ and $B^0$ photoproduction in $pPb$ and $PbPb$ collisions at the center - of - mass energies of the Large Hadron Collider (LHC) is investigated considering the color dipole S - matrix approach. The analytical expressions for the differential distributions are derived in the transverse momentum space and predictions for the rapidity and transverse momentum...
18+2'
We study the photoproduction of light vector mesons considering the proton and the nucleus as the target. Utilizing the dipole picture and the wave functions obtained via AdS/QCD, we were able to describe the HERA γp data and extend the analysis to the nuclear case considering the Glauber–Gribov formalism supplemented by an effective suppression factor RG accounting for the gluon...
18+2'
Event-by-event quantum fluctuations in the initial stages of ultrarelativistic nucleus–nucleus collisions have been theoretically predicted to influence observables constructed from final-state quantities, such as azimuthal two-particle momentum correlations. In several instances, these predictions have been indirectly confirmed through comparisons between experimental data and...
18+2'
Evidences of vortical effects have been recently found by experiments in heavy ion collisions, instigating new insights into the phase diagram of quantum chromodynamics. Considering the effect of rotations, lattice QCD calculations shows that temperatures for deconfinement and chiral symmetry restoration should increase with the angular velocity, and the dominant effects are related to...
18+2'
We have explored the influence of angular velocity on the shear and bulk viscosities of a rotating QCD medium. In the noncentral events of the relativistic heavy ion collisions, the resulting QCD medium acquires finite angular momentum, giving rise to a finite angular velocity. This rotational motion can notably alter various properties of the hot QCD medium, including the viscous...
18+2'
We propose a novel observable of jet thermalization in high-energy nuclear collisions, based on correlating $\Lambda$ hyperon polarization with vortex dynamics. Using hybrid simulations, we show that the deposition of energy and momentum by quenched jets generates toroidal vorticity rings, a ubiquitous structure in fluid dynamics. These rings induce a corresponding toroidal pattern of...
23+2'
We compute the photon yield and elliptic flow coefficient in relativistic heavy-ion collisions from gluon fusion and splitting processes induced by a magnetic field. The calculation accounts for the intense magnetic field and the high gluon occupation number at early times. The photon production induced by these process represents an excess contribution over calculations without...
18+2'
We present the first comprehensive Bayesian calibration of a state-of-the-art hybrid heavy-ion collision model incorporating a novel observable: the scaled particle spectra of pions. This observable isolates the intrinsic spectral shape and reveals a remarkable degree of universality across centrality classes and collision systems. Leveraging the JETSCAPE framework, we construct...
23+2'
The LHCb experiment is well suited to the spectroscopy of heavy flavor hadrons. The proton-proton collisions provided by the Large Hadron Collider produce a variety of heavy flavor states, and the excellent vertex and momentum resolution of the LHCb detector enables precision studies of hadron properties. Access to the kinematics of full decay chains allows amplitude analysis, which...
23+2'
18+2'
The large masses of B mesons allow them to decay into baryonic final states. The first observations and studies of such baryonic B decays were performed by the ARGUS and CLEO experiments in the 1990s.
The LHCb collaboration has measured the branching fractions of the decays $B^0$ and $B^0_s \to p \bar{p} p \bar{p}$ to be of the order of $10^{-8}$ using Run 1+2 datasets...
18+2'
Charge-Parity Violation (CPV) is expected in 3-body charm decays such as the $D^+\rightarrow K^- K^+\pi^+$. This is an interesting channel to investigate, and an amplitude analysis is required to understand the dynamics of different contributions to the final state and the dynamical origin of CPV. The present research seeks to analyse recent data of the Large Hadron Collider beauty...
27+3'
The Jefferson Lab eA program, initially carried out with a 5 GeV electron beam and the CLAS detector, is now continuing with beam energies up to 11 GeV using CLAS12. Looking ahead, there are plans to extend the program to higher energies following the CEBAF upgrade to beyond 20 GeV. The aim of eA program is to investigate the underlying mechanisms of medium-induced modifications to...
27+3'
Studying hadronization - the process by which quarks and gluons transition into hadrons -is fundamental to understanding the strong interaction dynamics within quantum chromodynamics (QCD). Using the CLAS12 detector at Jefferson Lab, the Run Group E (RGE) experiment offers unprecedented insights into hadronization in the nuclear medium. This talk will present preliminary results from...
Recent studies indicate that the decay width $\Gamma(\pi^0\to\gamma\gamma)$ is strongly reduced in the presence of a uniform external magnetic field. In this work, we study the effect of the magnetic field on the production of neutral pions in photon-photon interactions in ultra-peripheral heavy-ion collisions. In addition, we present the calculation of the production cross section of the...
The LHCb detector, with its forward rapidity coverage, can probe kinematic regions at low Bjorken-x as low as $10^{-6}$. This unique capability, combined with excellent momentum resolution, vertex reconstruction, and particle identification, enables precision measurements at low transverse momentum and forward rapidity.
Studies of associated production of $\Psi(2S)$ and $\Phi$ in diffractive...
The study of charge asymmetries in three-body 𝐵 ± → h h h decays provides a sensitive probe of CP violation in the beauty sector. Using the first data collected during LHCb Run 3, we are performing a preliminary investigation aimed at measuring these asymmetries through fits to the invariant mass distributions of selected candidates. The upgraded detector and higher instantaneous luminosity of...
Rare decays of B mesons, such as B⁰ → K*⁰(892)μ⁺μ⁻, play a crucial role in testing the Standard Model (SM) of particle physics and probing potential signs of New Physics (NP). These flavor-changing neutral current (FCNC) processes are forbidden at tree level in the SM and occur only via higher-order loop diagrams, making them extremely sensitive to virtual contributions from beyond the SM...
In this work, we analyze the scaling properties of Yang-Mills field theory that manifest as self-similarity of n-point functions truncated by the scale evolution. In certain approaches, fractal structures are used in Yang-Mills theories to circumvent computational difficulties, allowing the determination of an analytical expression for the coupling constant, which agrees with the results...
This work consists of a projection study on the efficiency of the PPS detector in the high-luminosity regime through the CEP process $pp\rightarrow p(W^{+}W^{-})p$ with hadronic decay in both W bosons. Simulated samples containing: signal for SM, anomalous coupling $a_0^W = 2\times 10^{-7}$, anomalous coupling $a_C^W = 2\times 10^{-5}$, and with the QCD background for $pp\rightarrow 4J$, were...
The High-Luminosity LHC (HL-LHC) presents challenges due to up to $200$ simultaneous interactions per beam crossing, where around $10\sim15\%$ of the reconstructed vertices are composed of multiple interactions time-separated by about $\sim150~\text{ps}$, which degrades the performance and the accuracy of the event reconstruction. To mitigate this, it is required to employ more precise timing...
The unprecedented proton-proton collision energy and the large data volumes reached by the LHC and the CMS detector with supreme particle detection capabilities provide a unique setting for discovering the particle constituting the dark matter. Since the beginning of the LHC, there were various DM searches within the CMS experiment. With this analysis, we embark on a novel search for...
18+2'
The multiplicity distribution (MD) of charged particles in high-energy proton-proton collisions remains an intricate aspect of quantum chromodynamics (QCD). Traditional models, such as the Negative Binomial Distribution (NBD), successfully described MDs at lower energies, but fail at higher energies, such as those probed by the Large Hadron Collider (LHC), where a "shoulder-like"...
23+2'
After confirmation of production of exclusive events with intact protons and ions at the LHC such as light by light scattering or dilepton exclusive production, there is increased interest to probe for photo or pomeron induced production of mesons and di-quark pair systems such as top antitop pairs. The talk describes key signatures for ttbar production with a single intact proton via...
18+2'
Diffractive processes in proton–lead (pPb) collisions provide a window into the nonperturbative regime of QCD, where color singlet exchanges and gluon saturation phenomena may play a key role. Recent observations of collective-like effects within jets suggest that signatures of collectivity, traditionally associated with heavy-ion collisions, may also emerge in small systems. In this...
27+3'
A key focus of the physics program at the LHC is the study of head-on proton-proton collisions. However, an important class of physics can be studied for cases where the protons narrowly miss one another and remain intact. In such cases, the electromagnetic fields surrounding the protons can interact producing high-energy photon-photon collisions. Alternatively, interactions mediated by...
18+2'
The Time-of-Flight (ToF) detectors in the ATLAS Forward Proton (AFP) system are designed to determine the primary vertex z-position of the pp -> pXp processes by comparing the arrival times measured in the ToF for the two intact protons in the final state. We present performance studies in terms of efficiencies and timing resolutions using high-statistics, low, and moderate pile-up data...
23+2'
This talk will present the recent results from various analyses on signals containing intact protons measured by the CMS Precision Proton Spectrometer (PPS), which includes searches for New Physics in the electroweak sector. As the operation of the HL-LHC will require more stringent selection of intact protons due to the higher pileup, the PPS2 project will be presented and projections...
23+2'
The baryon number violation is an essential ingredient for the preferential creation of matter over antimatter needed to account for the observed baryon asymmetry in the Universe. However, a process that violates baryon number has yet to be experimentally observed. The HIBEAM/NNBAR program is a proposed two-stage experiment at the European Spallation Source (ESS) to search for baryon...
23+2'
23+2'
