Recent progress in hadron-hadron interactions with lattice QCD simulations close to the physical pion mass opens the door for quantitative studies of the poorly understood low-energy hadron interactions with charm and strange quarks. It also allows comparison with femtoscopic studies in pp, pA, and AA collisions at RHIC (Relativistic Heavy Ion Collider at BNL) and LHC (Large Hadron Collider...
The quark model was formulated in 1964 to classify mesons as bound states made of a quark–antiquark pair, and baryons as bound states made of three quarks. However, in principle QCD also allows the existence of more complex structures, generically called exotic hadrons or known as XYZ states. These include fourquark hadrons (tetraquarks and hadronic molecules), five-quark hadrons (pentaquarks)...
After discussing the landscape of strongly interacting field theories, I will introduce novel theoretical approaches aimed at solving their complex dynamics. Following this, I will explore applications to particle and astroparticle physics, including the discovery of new strong dynamics via gravitational wave observatories. In the realm of particle physics, I will provide a mathematical...
The phase structure of QCD remains an open fundamental problem of standard model physics. In particular at finite density, where importance sampling based methods like lattice QCD are severely restricted, our knowledge is limited. Yet, numerous model studies point towards a rich and complex phase diagram at large density. In addition to their fundamental relevance, the thermodynamic and...
We consider the capture of dark matter in neutron stars, and the heating caused by the subsequent thermalization and annihilation of that dark matter. We find that most of the dark matter’s kinetic energy is rapidly deposited in the star. Furthermore, we find that capture-annihilation equilibrium, and hence maximal annihilation heating, can be achieved without complete thermalization of the...
In collisions of heavy ions at ultra-relativistic energies at the Large Hadron Collider the deconfined state of nuclear matter, dubbed quark-gluon plasma (QGP), is produced.
Measurements of collective anisotropic flow have extensively contributed to the foundation of a perfect liquid paradigm about QGP properties, according to which QGP is the state of matter with the smallest specific...
The spectrum of hadronic states holds valuable information about the interaction of the strong force. Photoproduction experiments can provide crucial insights due to their ability to produce a wide range of conventional and non-conventional hadrons, such as exotic hybrid mesons with gluonic degrees of freedom.
The GlueX experiment at Jefferson Lab, VA, USA, features a 9 GeV linearly polarized...
Hidden-flavour states are being actively studied at Belle II; the
programme is currently focussed on energy scan data taken above the
Upsilon(4S). Several results will be discussed, including constraints
on the properties of the Upsilon(10753), and analyses combining Belle
and Belle II data. Prospects for further results will also be set out,
including measurements based on the growing...
The $SU(3)\otimes SU(2) \otimes U(1)$ standard model maps smoothly
onto a conventional lattice gauge formulation, including the
parity violation of the weak interactions. The formulation makes
use of the pseudo-reality of the weak group and requires the
inclusion a full generation of both leptons and quarks. As in
continuum discussions, chiral eigenstates of the...
I will summarise some recent work on charm mesons and charmonium resonances, including exotics, using first-principles lattice QCD calculations. Investigations of S-wave $D\pi$ scattering will be presented, relevant for the $D^{\ast}_0(2300)$ and the enigmatic $D^{\ast}_{s0}(2317)$, where an exotic-flavour virtual bound state was found. Of other results that will be discussed, a highlight is a...
I will describe recent work on anomalies and fractional instantons on a twisted four torus and their relevance for the calculation of the gaugino condensate in minimally-supersymmetric four-dimensional Yang Mills theory
(Anti)deuterons, being the simplest light ions, have recently become the subject of many studies aimed at a better understanding of their production mechanisms in heavy-ion collisions where the quark–gluon plasma is formed. The mystery surrounding (anti)deuterons lies in their small binding energy, which holds the neutron and the proton together. This binding energy is about seventy times...
The ALICE experiment at the LHC has extensively studied the production of light flavour particles from small to large hadronic collision systems. In particular, ALICE measured the production of rare probes, such as strange and multistrange hadrons, light (anti-)nuclei, such as (anti-)deuterons, (anti-)triton, (anti-)helium, together with their strange counterparts, i.e....
Core-Collapse Supernovae, the explosions of massive stars, are among the several types of gravitational-wave sources yet to be discovered by gravitational wave interferometers. These cataclysmic events may yield insights into the nuclear EoS at multiple times nuclear saturation density. I will review the current advancements in deducing properties of the proto-compact star from gravitational...
The XYZ exotic states discovered in the hadronic sector with two heavy quarks constitute one of the most important open problems in particle theory. In this talk, I show that an effective field theory derived from QCD, the Born Oppenheimer effective field theory (BOEFT), can describe exotics of any composition. I show the results of general Schr\"odinger coupled equations for arbitrary angular...
We review recent developments in the determination of the quark and gluon structure of hadrons from global QCD analysis within the JAM analysis framework, including polarized and unpolarized PDFs in the proton, and momentum distributions in the pion.
The Belle II collaboration recently announced that they observed the $B^+ \rightarrow K^+ \nu \bar{\nu}$ decay process for the first time. This mode has been theoretically identified as a very clean channel. However, their result encounters a 2.7 $\sigma$ deviation from the Standard Model (SM) calculation. On the other hand, last year, Fermilab released new data on muon g−2 away from the SM...
The double copy mechanism relates the scattering amplitudes of Yang-Mills theories to the theory of gravity. In this talk I will demonstrate how gravitational amplitudes in arbitrary dimensions can be obtained via the double copy prescription of gauge theories. I will further demonstrate that the prescription holds even for compactified gauge theories, which can be related to compactified...
We investigate the vacuum structure of SU(3) Yang-Mills theory on the lattice in the presence of chromometallic mirrors both at zero and finite temperatures in 3+1 dimensions. The new excitation at the boundaries with the mass $m_{gt} = 1.0(1)\sqrt{\sigma}=0.49(5)$GeV which is more than three times lighter than mass of $0^{++}$ groundstate glueball was uncovered. We call this excitation...
The nontrivial quark structure of light scalar mesons f0(500), f0(980) and a0(980) remains controversial for many years. In passed years, BESIII has collected 8.0 and 7.33 fb^-1 of e+e- collision data samples at 3.773 and 4.178-4.226 GeV, respectively. In this talk, we will review all the studies about light scalar mesons via semileptonic D decays at BESIII. These studies includes the decays...
The Quark-Meson Coupling (QMC) model describes a self-consistent relationship between the dynamics of the quark structure of a nucleon and the relativistic mean fields arising within the nuclear medium. The model has been successful in computing ground-state observables of finite nuclei and in predicting properties of dense nuclear matter and non-rotating neutron stars. This presentation will...
In this work, we study the in- and out-of-equilibrium Chiral Magnetic Effects (CME) from lattice QCD simulations using two approaches. In the equilibrium approach, we consider a non-uniform magnetic background and show that local chiral magnetic currents appear as a response. We show that these currents average zero in the full volume, confirming that the total CME conductivity vanishes in...
We study the properties of the hadron-hadron potentials and quark-antiquark potentials from the viewpoint of the channel coupling[1]. We introduce the effective hadron-hadron potential with coupled to the quark channel.
As an application, we construct a coupled-channel model of $c\bar{c}$ and $D\bar{D}$ to describe exotic hadron $X(3872)$[2].
For the obtained nonlocal potentials, we apply...
Numerical methods for exploring high-dimensional parameter spaces are crucial across a wide variety of scientific fields, including:
- global fitting particle physics models (Frequentist likelihoods)
- constraining cosmological parameters (Bayesian posteriors)
- folding proteins (free energy landscapes)
- phase diagrams in chemistry and lattice field theory (partition
...
At the TeV scale, low-energy precision observations of neutron characteristics provide unique probes of novel physics. Precision studies of neutron decay observables are susceptible to beyond the Standard Model (BSM) tensor and scalar interactions, while the neutron electric dipole moment, $d_n$, also has high sensitivity to new BSM CP-violating interactions. To fully utilise the potential of...
In a high energy physics experiment, a straightforward approach to estimating the dependency of a distribution of events on a nuisance parameter is to take the difference of histograms of the distribution coming out of a simulation before and after perturbing the value of the nuisance parameter. This is often done by perturbing one already simulated event at a time by a small post-simulation...
The origin of the EMC effect is one of the major unsolved problems in nuclear physics. Recent studies suggest that the EMC and Short Range Correlation (SRC) are correlated, and quantitative relations are obtained. In this talk, I will introduce our recent work on the EMC effect for the gluon and its correlation with the SRC. We explore the gluon EMC effect through heavy flavor production in...
The results on recent studies of nuclear dynamics at extremely large internal
momenta in the deuteron are presented. We demonstrate that the paradigm shift
in the description of the deuteron consisting of proton and neutron to the description of
the deuteron as a pseudo-vector composite system in which proton and neutron is
observed in high energy electro-disintegration processes...
The differential photon emissivity of the QGP is proportional to the transverse channel spectral function $\sigma(\omega)$ at lightlike kinematics.
Estimating the full energy-differential photon emissivity of a medium at thermal equilibrium from lattice QCD poses a challenge, as it involves a numerically ill-posed inverse problem. However, energy-integrated information on the photon...
In this talk, we explore the QCD vacuum structure with topological theta angle, employing a novel semiclassical framework on $\mathbb{R}^2 \times T^2$ with 't Hooft and baryon magnetic fluxes. Grounded in the adiabatic continuity conjecture, the semiclassical analysis at small $T^2$ can capture the QCD vacuum structure, and the confining vacuum is described by the dilute gas of center...
In a recent publication [Few Body Syst. 65 (2024) , 59] we derived covariant equations describing the tetraquark in terms of an admixture of two-body states DD ̄ (diquark-antidiquark) and MM (meson-meson), with three-body-like states (where two of the quarks are spectators while the other two are interacting), and qq ̄ annihilation taken into account exactly. These equations have the feature...
We extend the recent study of $K_{1}/K^{*}$ enhancement as a signature of chiral symmetry restoration in heavy ion collisions at the Large Hadron Collider (LHC) via the kinetic approach to include the effects due to non-unity hadron fugacities during the evolution of produced hadronic matter and the temperature-dependent $K_1$ mass. Although including non-unity pion and kaon fugacities...
Quantifying tension between different experiments aiming to constrain the same physics is essential for validating our understanding of the world around us. A commonly used metric of tension is the evidence ratio statistic, R, corresponding to the ratio of a joint evidence to the product of individual evidences under a common model. R can be interpreted as the fractional increase in our...
Recently, exotic hadrons have attracted much attention. Most exotic hadrons appear near the threshold; $X(3872)$ near the $D\bar{D}^{*}$ threshold, $T_{cc}$ near the $DD^{*}$, $P_{c}$ near the $\Sigma_c \bar{D}^{(*)}$. It is important to study the hadron scattering near threshold in order to clarify the nature of exotic hadrons. Based on this observation, we discuss the general behavior of the...
The newly completed Stawell Underground Physics Laboratory (SUPL) in the Stawell Gold Mine will host rare event physics searches, including the dark matter direct detection experiment SABRE South, as well as low background experiments such as radiobiology and quantum computing. Neutrons present an important background to the experiments within SUPL, their penetrating power and neutral charge...
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 $K^+ \rightarrow \pi^+ \nu \bar\nu$ decay, based on 20 candidates.
In this talk NA62 reports new results from the analyses of rare kaon and pion decays, using data samples collected in 2017-2018. A sample of $K^+...
We describe a software pipeline that models atmospheric gamma and hadron showers and their detection and reconstruction by an array of Cherenkov detectors on the ground, as well as the calculation of a utility function aligned with the scientific goals of the SWGO experiment. The variation of the utility with the position of each detector on the ground allows to perform stochastic gradient...
I will discuss the first lattice QCD calculation of the universal axial γW-box contribution to both superallowed nuclear and neutron beta decays. This contribution emerges as a significant component within the theoretical uncertainties surrounding the extraction of |Vud| from superallowed decays, thereby making an important impact on the precision test of the first-row CKM unitarity.
Filtering methods based on adjoint fermion zero modes are presented in this talk. The theoretical foundations and relations of supersymmetric theories are discussed and results from Monte Carlo data are presented. Furthermore, some specific properties of Yang-Mills theories with twisted boundary conditions are introduced, which lead to an interesting approach for a better understanding of...
Particle physics experiments often rely on statistical hypothesis testing to determine statements of discovery, evidence, or exclusion, typically assessed through p-values, "number of sigmas." However, in many cases, the significance is evaluated using asymptotic formulae based on Wilk's Theorem, without guarantees that its conditions are fulfilled. Alternatively, p-values can be assessed...
A method to sum over (unknown) final states is proposed in
the lattice QCD calculation. Systematically improvable in principle,
but it induces new problems, including the one related to the
approximation of the kernel function. Potential applications other than
the inclusive decays will be discussed too.
COMPASS is the longest-running experiment at CERN, with a record-breaking 20 years of data collection from 2002 to 2022. The experiment has a unique and diverse physics program focused on nucleon structure and spectroscopy measurements.
The experimental results obtained by COMPASS during Phase I (2002-2011) and Phase II (2012-2022) for a wide range of nucleon spin structure-related DIS and...
The neutron lifetime anomaly speaks to the possibility of exotic decay channels of the neutron. The very existence of neutron stars constrains the strength of such effects, and in this talk I develop how precisely determined energy-loss constraints, particularly anomalous binary-pulsar period lengthening, limit not only the total baryon loss rate across the star but also the parameters of the...
Thermal photon and dilepton rates are central probes for understanding the quark-gluon plasma and QCD at high temperatures. As a consequence there is a strong interest to determine them using lattice QCD calculations. However, this is made difficult as they are related to thermal spectral functions that are not directly accessible through lattice calculations. Instead they are indirectly...
While the mandate of particle physics research institutes is fundamental research, the developed technologies find applications for the benefit of society. With the aim to highlight their impact on medical applications and in particular on cancer treatment, the new Particle Therapy MasterClass (PTMC) package was developed and integrated into the International MasterClass 2021 (IMC) online...
The ARC Centre of Excellence for Dark Matter Particle Physics has developed a partner school program to build long-term collaborations with traditionally underserved regional and rural schools in Australia. Now in its fourth year, this program has expanded to seven schools across two states.
In this session, we will discuss: The inspiration, drive, and support behind the development of the...
There have been rapid developments in the direct calculation in lattice QCD (LQCD) of the Bjorken-x dependence of hadron structure through large-momentum effective theory (LaMET) and other similar effective approaches. These methods overcome the previous limitation of LQCD to moments (that is, integrals over Bjorken-x) of hadron structure, allowing LQCD to directly provide the kinematic...
In high energy collision experiments with multiple hadron productions, the momentum distribution of the measured hadron pair shows a correlation due to the hadron interactions and the quantum statistics. In the past, this femtoscopy technique has been developed to extract the information of the emission source from the momentum correlation functions. Recently, correlation function measurement...
The geometry of centre vortices is studied in SU(3) lattice gauge theory at finite temperature to capture the key structural changes that occur through the deconfinement phase transition. Visualisations of the vortex structure in temporal and spatial slices of the lattice reveal a preference for the vortex sheet to align with the temporal dimension above the critical temperature. This is...
In recent years, many vector charmonium(-like) states were reported by different electron-positron collider experiments above 4.2 GeV. However, so far, there not only exists sizable tension in the parameters of those states, but there is also no consensus on the number of the vector states in this energy range.
In this talk, we focus on the mass range between 4.2 and 4.35 GeV, conducting a...
Owing to the color confinement, the phenomena of strong interaction physics can be described either in terms of fundamental quarks and gluons of Quantum Chromodynamics (QCD) or as mesons and baryons and the nuclear force between them. Mesons and baryons themselves are confined dynamic systems of quarks and gluons. Understanding fully the relationship between this dual representation of...
The gravitational form factors (GFFs) describe the fundamental structure of nucleons and nuclei through the matrix element of the energy-momentum tensor. Their Fourier transform allows a description of the spatial distribution of mass, angular momentum, pressure, and shear force densities for both quarks and gluons in the nucleon. In this presentation, I will focus on the recent results of the...
We study the system of light mesons, charmonium and glueballs in the flavour singlet channels where they can mix. We use lattice QCD simulations with an almost physical charm quark and three degenerate light quarks for two values of the pion mass ($m_{\pi} \approx 420, 800$ MeV). Thanks to a variational basis which includes mesonic operators with profiles in distillation space, Wilson loops...
In this talk, we revisit the idea proposed by one of us in PRD 98 036018 (2018) where the nonoriented component, in 4d ensembles of percolating thin center-vortex worldsurfaces, was shown to be essential to understand the properties of confinement at asymptotically large distances between heavy quarks. The same physics was reobtained in the Schrödinger's wave (functional) representation PRD...
It has been suggested [1] that the observation of pulsars with the same mass but significantly different radii (twin stars) would prove that the existence of a critical endpoint in the QCD phase diagram since this phenomenon requires a strong phase transition in cold neutron star matter.
We explore whether such a phase transition in neutron star cores, possibly coupled with a secondary kick...
A study of centre vortices and gluon propagators is presented on anisotropic, dynamical lattices. We use thermal ensembles from the FASTSUM collaboration and results are discussed in both the confined and deconfined phases. Centre vortices are analysed including their percolation and branching point properties, and an analysis of the Landau gauge-fixed gluon propagators is presented. Issues...
A singly heavy baryon can be viewed as a bound state of $N_c-1$ valence quarks in a pion mean-field approach, a heavy quark being regarded as a static color source. This aspect provides a great virtue of dealing with both light and singly heavy baryons on an equal footing. The presence of $N_c-1$ valence quarks polarizes the vacuum and produces pion mean fields, by which the $N_c-1$ valence...
We propose a new approach to search for light dark matter (DM) in the mass range of keV-GeV via inelastic nucleus scattering at large-volume neutrino detectors such as Borexino, DUNE, JUNO, and Super-/Hyper-K. The approach uses inelastic nuclear scattering of cosmic-ray boosted DM, enabling a low-background search for DM in these experiments. The large-volume neutrino detectors with higher...
We consider a pure Yang-Mills theory on $\mathbb{T}^2\times\mathbb{R}^2$ with boundary conditions imposed not only in the imaginary time direction but also in one spatial direction, and discuss thermodynamic quantities and their phase structures. The introduction of the boundary condition leads to the breaking of rotational symmetry, resulting in anisotropy of the pressure. Results from...
Motivated by color-magnetic instability in QCD [1,2], we investigate spatial color-magnetic correlation in SU(2) and SU(3) lattice QCD. In the Landau gauge, we numerically obtain the spatial color-magnetic correlation $\langle H_z^a({\bf x}) H_z^a({\bf x}+{\bf r})\rangle$. Curiously, the correlation is found to be always ${\it negative}$ for ${\bf r}$ on $xy$-plane, apart from the same-point...
Diquarks are often invoked as QCD effective degrees of freedom to describe baryons as well as certain exotic hadrons. However, even though they are successful in describing many of these low lying QCD states, they and their properties have been difficult to pin down. Here we present progress in studying diquarks in a gauge-invariant setup through embedding them in a parent hadron containing a...
The quark-hadron transition that happens in ultra-relativistic heavy-ion collisions is expected to be influenced by the effects of rotation and magnetic field, both present due to the geometry of a generic non-head-on impact. We augment the conventional $T$-$\mu_B$ planar phase diagram for QCD matter by extending it to a multi-dimensional domain spanned by temperature $T$, baryon chemical...
Loss of unitarity in an effective field theory is often cured by the appearance of dynamical resonances, revealing the presence of new degrees of freedom. These resonances may manifest themselves when suitable unitarization techniques are implemented in the effective theory, which in the scalar-isoscalar channel require making use of the coupled-channel formalism. Conversely, experimental...
We study one-flavor $\mathrm{SU}(2)$ and $\mathrm{SU}(3)$ lattice QCD in ($1+1$) dimensions at zero temperature and finite density using matrix product states and the density matrix renormalization group. We compute physical observables such as the equation of state, chiral condensate, and quark distribution function as functions of the baryon number density. As a physical implication, we...
we evaluate the energy loss rate of supernovae induced by the axion emission process 𝜋+𝑝→𝑛+𝑎 with the Δ(1232)resonance in the heavy baryon chiral perturbation theory for the first time. Given the axion-nucleon-Δ interactions, we include the previously ignored Δ-mediated graphs to the 𝜋+𝑝→𝑛+𝑎 process. In particular, the Δ-mediated diagram can give a resonance contribution to the supernova axion...
In this talk, I will present our recent work on two-loop QCD corrections to pion electromagnetic form factors with large momentum transfer.
We explicitly verify the validity of the collinear factorization to two-loop order for this observable, and obtain the respective IR-finite two-loop hard-scattering kernel in the closed form.
Incorporating this new ingredient of correction, we make a...
The SABRE experiment aims to provide a definitive answer on the nature of the purported dark matter annual modulation signal from the DAMA/LIBRA experiments. Their 12.9𝜎 measurement remains incompatible with null results of other dark matter experiments. By relying on ultra-pure NaI(Tl) crystals and dual hemisphere locations, the SABRE experiment will provide a model independent...
We discuss the QCD phase diagram in strong magnetic fields, where the chiral condensate is enhanced by the magnetic catalysis mechanism. In contrast to the conventional discussions, we include heavy-quark impurities that have been known to induce the Kondo effect. We propose a quantum critical point that arises as a consequence of the Kondo effect and the chiral symmetry breaking. Our phase...
The renormalization group (RG) beta function characterizes the nature of gauge-fermion systems, describes the running of the renormalized coupling, and connects ultraviolet and infrared regimes of quantum field theories. We use the RG beta function as a tool to explore how gauge-fermion systems with SU(3) gauge group change, when the number of fundamental flavors increases. Using lattice field...
In the present work we calculate the transition magnetic moments for the radiative decays of $\Delta $ baryon to $proton$ ($\Delta \rightarrow p$) in isospin asymmetric strange hadronic medium at finite temperature using chiral $SU(3)$ quark mean field model. Within the framework of chiral $SU(3)$ mean field model, the properties of baryons in strange isospin asymmetric medium are modified...
I discuss the symmetry and the physics which distinguishes the confinement and Higgs phases of a gauge-Higgs theory, and the possible existence of unexpected particle excitations in the Higgs phase.
We present a unified approach to the transition from hadronic matter to quark matter where hadrons are treated as bound states of quarks which dissociate at high densities due to quark Pauli blocking. We demonstrate that a sudden switch of the quark mass from a sufficiently high value to mimic quark confinement to its current mass value is compatible with a smooth crossover behavior of the...
When continuous symmetry is spontaneously broken, the system supports gapless Nambu-Goldstone modes. As a result, the low-energy real-time dynamics are governed by hydrodynamic theory incorporating these Nambu-Goldstone modes. In this talk, I will introduce a general framework for deriving hydrodynamic equations for symmetry-broken phases and discuss their potential application to dense...
I will discuss a lattice QCD calculation of the nucleon electric polarizabilities at the physical pion mass. Our findings reveal the substantial contributions of the Nπ states to these polarizabilities. Without considering these contributions, the lattice results fall significantly below the experimental values, consistent with previous lattice studies. This observation has motivated us to...
After briefly reviewing the axion solution to the strong CP problem, I will discuss recent new alternative ideas based on CP as part of a spontaneously broken flavour symmetry such as modular invariance.
Beta decays offer an opportunity for low-energy precision tests of the Standard Model, in particular, checking the unitarity of the first-row CKM matrix which connects the weak and QCD flavor bases. These tests require a combination of the experimental measurements, effective field theory and phenomenology, as well as lattice QCD for non-perturbative input. State of the art theory...
Almost twenty years ago, physicists at at Brookhaven National Laboratory measured the magnetic moment of the muon with a remarkable precision of 0.54 parts per million. Since that time, the reference Standard Model prediction for this quantity has exhibited a persistent discrepancy with experiment of more than three sigma. This raises the tantalizing possibility of undiscovered forces or...
In recent years, rapid progress has been made on the determination of PDFs and others from Lattice QCD. Very promising results are obtained while there are still some open questions that need to be discussed. New perspectives are also required, and we hope through this round table discussion, new thoughts can be inspired.
Ab initio nuclear structure theory aims to predict the structure of atomic nuclei from "first principles," employing systematically improvable approximations for nuclear forces and many-body wave functions. This ab initio paradigm has been established as a consistent, precise framework for predicting the structure of medium-mass nuclei with the ability to fully quantify uncertainties. In...
High-order perturbative calculations are one of the only first-principles ways of studying the behaviour of QCD matter at extreme densities. Understanding such matter has become increasingly important in recent years, with the improved experimental access to neutron stars --- the only known systems where deconfined dense matter exists --- via both improved measurements of lonely neutron stars...
Duality between quarks and baryons is the fundamental properties of QCD. We have recently shown in Ref. [1] that the duality is closely tied to Quarkyonic nature of matter at high baryon density. We have formulated a dual model for dense QCD, which allows a thermodynamic description both in terms of baryons or quarks, with the quark confinement relation that sets the transformation between...
We deepen the understanding of the primordial composition of the Universe in the temperature range $130\,\mathrm{GeV}>T>0.02\,\mathrm{MeV}$ within the big-bang FLWR cosmology model by applying the know-how of the Standard Model (SM) of particle physic. In this temperature range the unknown cold dark matter and dark energy have a negligible influence allowing a reliable understanding of...
Superinsulators are a new topological state of matter, predicted by our collaboration and experimentally observed in the critical vicinity of the superconductor-insulator transition (SIT). Superinsulators are dual to supercon- ductors and realise electric-magnetic (S) duality. In superinsulators ,Cooper pairs are linearly bound by electric fields squeezed into strings (dual Meissner effect) by...
We investigate the effects of rotation on deconfinement and chiral phase transitions in the framework of dynamical holographic QCD model. Instead of transforming to the rotating system by Lorentz boost, we construct an anisotropic gravitational background by incorporating the rotating boundary current. We firstly investigate the pure gluon system under rotation to extract deconfinement phase...
Machine learning technologies has gained a great advance to affect various fields of research in physics, and nonperturbative QCD is not an exception. Here in this talk I will rephrase the AdS/CFT correspondence by a deep learning architecture, and demonstrate the emergence of the gravity geometry by using QCD data, thus establishing a possible duality between QCD and a gravitational theory....
Baryon spectroscopy gives insights into the dynamics between the constituents of baryons and study quantum chromodynamics (QCD) in the non-perturbative regime. Quark models and Lattice calculations predict a large number of baryons, but only a fraction of them have been found experimentally.
The baryon spectra can be probed with a real photon beam by studying various different...
FASER, the Forward Search Experiment, at the Large Hadron Collider (LHC) aims to study neutrino interactions with the unexplored high energy range and to search for light, weakly-interacting new particles. The detector is located 480 m downstream of the ATLAS interaction point along the beam axis.
The FASER collaboration announced the first direct observation of collider neutrinos, using the...
Recently, we conducted a kaonic nuclear-bound state search experiment using a K
−
beam
(1 GeV/c) bombarding a 3He target. We succeeded in observing a kaonic nuclear quasi-bound
state,“K−pp”, via a nucleon knockout reaction, K−N → K ̄n′, followed by the decay K ̄NN → Λp
(2NK ̄A) in the two-nucleon K ̄ absorption process, resulting in the final state Λp + n′. The result
−
cay width of...
While the excitation spectrum of light mesons, which are composed of up and down quarks, is already mapped out fairly well, the spectrum of strange mesons is still to be mapped out in detail, potentially holding many surprise.
At the COMPASS experiment at CERN, we study the strange-meson spectrum in the diffractive scattering of a high-energy kaon beam.
In this talk we will focus on the...
Due to its phenomenological relevance in heavy-ion collisions, cosmology and astrophysics, the determination of the QCD pressure - either at high temperature or large baryon density - has driven a number of important theoretical advances in perturbative thermal field theory applicable to equilibrium thermodynamics. In particular, the long-standing infrared problems that obstruct the...
The Belle II experiment at the SuperKEKB energy-asymmetric e+e− collider is a substantial upgrade of the B factory facility at the KEK laboratory. Belle II will be able to measure the Cabibbo-Kobayashi-Maskawa (CKM) matrix, the matrix elements and their phases, with unprecedented precision and explore flavor physics with B, charmed mesons, and τ leptons. We report on recent results obtained by...
I will discuss recent progress in heavy quarkonium calculations from lattice QCD. Fully relativistic QCD on fine lattices -- with physical light and heavy quark masses, and realistic sea quark content -- allows precise determination of a number of charmonium and bottomonium properties such as meson masses and decay constants, which provide stringent tests of the strong interaction. Meson...
I will review the latest fluctuation measurements of strangeness, charge and baryon number from LHC and RHIC, with a focus on results from the second beam energy scan at RHIC. I will confront the data with lattice QCD calculations at zero and small baryon densities and with phenomenological and holographic models at finite baryon densities.
In this talk, I will present our latest theoretical results regarding the exclusive double J/psi production at the B factory.
I will elucidate the reasons why the conventional NRQCD-based predictions for this process exhibit a notably poor convergence. I will then demonstrate that this convergence can be significantly enhanced by employing an improved NRQCD factorization approach. I will...
It has been a long-standing problem to study parton showers with important quantum interference effects. In this work, we discuss quantum/classical veto algorithm with kinematical effects incorporated. Our veto algorithm could be of wider use in many other problems of Monte Carlo simulations with quantum interferece effects. This talk is based on Phys. Rev. A 109, 032432 (2024)...
The possible link between entanglement and thermalization, and the dynamics of hadronization are addressed by studying the real-time response of the massive Schwinger model coupled to external sources. This setup mimics the production and fragmentation of quark jets, as the Schwinger model and QCD share the properties of confinement and chiral symmetry breaking. By using quantum simulations on...
We resum the double logarithmic singularities at threshold in heavy quarkonium fragmentation functions based on the nonrelativistic QCD factorization formalism. At fixed order, we reproduce the double logarithmic singularities known at next-to-leading order accuracy. Unlike fixed-order calculations, the resummed fragmentation functions we obtain are smooth functions that no longer contain...
Exploration of the QCD phase diagram is pivotal in particle and nuclear physics. We construct a full four-dimensional equation of state of QCD as a function of the temperature and the chemical potentials of baryon (B), charge (Q), and strangeness (S) by extending the NEOS model [1] beyond the conventional two-dimensional approximation. Lattice QCD calculations based on the Taylor expansion...
We present a novel deep learning approach to rebuild the dense matter equation of state (EoS) for probing neutron star observables. By leveraging an automatic differentiation framework, our method solves inverse problems and achieves accurate EoS optimization. Through training a neural network on a comprehensive dataset, we develop a predictive EoS model that yields precise relationships...
It was found that, using nonrelativistic QCD factorization, the predicted $\chi_{cJ}$ hadroproduction cross section at large $p_T$ can be negative. The negative cross sections originate from terms proportional to plus function in $^3P_{J}^{[1]}$ channels, which are remnants of the infrared subtraction in matching the $^3P_{J}^{[1]}$ short-distance coefficients. In this article, we find that...
The self-interacting nature of gluons remains one of the most fascinating characters of QCD. An observation of glueball states will be the ultimate validation of low energy QCD. The radiative decay of the $J/\psi$ meson is a gluon-rich process and is therefore regarded as an ideal place for searching and studying glueballs.
Based on $(10087\pm44)\times10^{6}$ $J/\psi$ events collected with...
It is well known that Dark Matter can be captured and accumulate in celestial objects. While this problem and been studied thoroughly for the Sun and the Earth, recently compact celestial objects like White Dwarfs and Neutron Stars have raised the interest of the scientific community. Here I present two recent results related to these objects.
In the case of Neutron Stars, we consider Dark...
We present the first observation of the rare η→μ^+ μ^- μ^+ μ^- double-Dalitz decay. The analysis is based on data collected by the CMS experiment at the CERN LHC operating at the centre-of-mass energy of √s=13 TeV. The data sample was collected with high-rate muon triggers for an integrated luminosity of 101 fb^(-1).
The branching fraction of the η→4μ decay is measured relative to the η→2μ...
We present a talk on recent investigations of the gravitational form factors (GFFs) and relevant mechanical structure of the nucleon, focusing also on the flavor components of the GFFs. We employ a pion mean-field approach, grounded in the large Nc limit of Quantum Chromodynamics (QCD). We mainly consider the contributions from the twist-2 operators to the flavor-triplet and octet GFFs. We...
The BESIII experiment locates at the BEPCII $e^+e^-$ collider in Beijing, China, running in a center-of-mass energy range from 1.84 GeV to 4.95 GeV. After 15 years of successful running of the experiment since 2009, BESIII has accumulated more than 50 fb$^{-1}$ of electron-positron annihilation data, which include 10 billions J/ψ events, 2.7 billions ψ(2S) events, 20 fb$^{-1}$ $D\bar{D}$...
The production of particles containing heavy quarks (beauty and charm) from proton and heavy ion collisions is extensively studied at the LHCb (Large Hadron Collider beauty) experiment. Studying the effect of multiplicity on the production of particles containing heavy quarks, probes the production mechanism of such particles.
The LHCb experiment is unique in its ability to observe...
Current noisy quantum computers can be already used to investigate properties
of quantum systems. Here we focus on lattice QED in (2+1)D including fermionic matter.
This complex quantum field theory with dynamical gauge and matter fields has similarities
with QCD, in particular asymptotic freedom and confinement.
We define a suitable setup to measure the static potential between two...
The study of CP violation is critical for understanding the asymmetry between matter and antimatter in the universe. This talk presents the CP violation in $B_s^0 \to J/\psi\,\phi$ decays measured with the CMS detector at the LHC using Run 2 data. A full angular analysis of the decay is performed, extracting several key parameters such as the CP-violating phase, the amount of direct CP...
Generalised parton distributions promise to expand our understanding of the behaviour of the elementary quarks and gluons into three dimensions. They provide us with a framework for describing the position of the quarks and gluons as well as how they divide the hadron’s momentum between them. This is an exciting research frontier to be investigated at Jefferson Lab as well as the future...
Including the effects of the chiral anomaly within Chiral Perturbation Theory at finite baryon chemical potential, it has been shown that neutral pions form an inhomogeneous phase dubbed the "Chiral Soliton Lattice" (CSL) above a certain critical magnetic field. Above a second, even higher critical field, the CSL becomes unstable to fluctuations of charged pions, implying they condense. I will...
GAMBIT - the Global and Modular beyond-Standard Model Inference Tool - is an open-source package for performing global fits of beyond-Standard Model physics theories. I will present the design of the package and some highlights of recent results.
In this talk, I will introduce a novel framework proposed to extract near-threshold resonant states from finite-volume energy levels of lattice QCD and is applied to elucidate structures of the positive parity $D_s$. The quark model, the quark-pair-creation mechanism and $D^{(*)}K$ interaction are incorporated into the Hamiltonian effective field theory. The bare $1^+$ $c\bar s$ states are...
This talk present the study on the next-to-next-to-leading-order (NNLO) QCD corrections to $e^+e^- \to J/\psi+\eta_c$ and $e^+e^- \to J/\psi+J/\psi$ at the $B$ factories, based on our two published work :
JHEP 02 (2024) 055e-Print: 2311.04751 [hep-ph], and JHEP 02 (2023) 049, e-Print: 2212.03631 [hep-ph].
For $e^+e^- \to J/\psi+\eta_c$ is enhanced by about $17\%$, and the perturbative...
Since the matter in neutron stars is stable long term, then to the extent that the cores of such stars are hadronic, one must satisfy the conditions of beta equilibrium and hyperons must be present. The initial appearance of hyperons carries low momentum and thus slows the increase in pressure in comparison to the nucleon only equation of state. In turn, the maximum mass is lowered when...
The CMS group has recently reported an anomaly in the production of particles at ~95 GeV above expected background at the LHC in the ditau and diphoton channels. Taken with an older result from LEP showing a similar anomaly in bb production, this indicates the prospect of a new particle at this energy.
As a possible explanation for these anomalies, we consider a pair of Simplified Models...
Whether interested in hadron spectroscopy, nuclear structure, or precision tests of the standard model, three-hadron dynamics play a key role in a broad class of rich physical phenomena. Presently, lattice QCD is the only non-perturbative tool for studying QCD exactly. In this talk, I review novel formal techniques that have allowed to non-perturbatively constraining scattering amplitudes...
Relativistic heavy-ion collisions at the LHC create the quark–gluon plasma (QGP); a state of matter where quarks and gluons are not confined inside hadrons. In this review talk I will show what measurements of key observables in Pb-Pb, Xe-Xe, p-Pb and pp collisions at the LHC experiments have taught us about the hottest fluid ever studied in the laboratory and what this tells us about the...
Sasha Andrianov passed away a few months ago. His work span more than four decades in high energy physics, with very significan contributions associated to current trends in the theory of elementary particles: bosonization of quantum chromodynamics, Higgs physics, cosmology of complex systems, supersymmetric quantum mechanics, anomalies in quantum field theory, local parity violation under...
We present a method for computing energy spectra in quantum field theory by digital quantum simulation. We utilize a quantum algorithm called coherent imaging spectroscopy which quenches the ground state with an oscillating perturbation in time and then reads off the excited energies from the vacuum persistence probability following the quench. We demonstrate this method in the lattice...
In recent experiments in the heavy quark sector, various candidates of exotic hadrons have been observed. Most of exotic hadrons are discovered near the threshold of two-body scattering as represented by $T_{cc}$ and $X(3872)$ [1,2]. Such near-threshold states are empirically considered as hadronic molecules [3]. To focus on the molecular structure, it is useful to calculate the compositeness,...
We investigate the internal structure of deuteron using the light-front wave functions obtained from the two Schrödinger-like equations: the light-front holographic QCD equation and the 't Hooft equation. The former governs the transverse dynamics inside the composite system, while the latter describes the confinement in the longitudinal direction. After generating the wave functions, we...
Modern few- and many-body simulations of nuclei rely on precise nuclear forces and electro-weak currents. A powerful tool which makes such high-precision calculations possible without losing connection to Quantum Chromodynamics (QCD), the fundamental theory of the strong interaction, is chiral effective field theory (EFT). Instead of working directly with quarks and gluons it is more efficient...
We investigate the roles of the electromagnetic interaction in the photoproductions and radiative decays of nucleon excitations and exotic heavy hadrons, as well as their relevant electromagnetic form factors. Our quantitative investigation shows that their electromagnetic properties can provide important hints to decode the inner structure of hadrons. The electromagnetic processes can better...
We introduce Nuclear Co-Learned Representations (NuCLR), a deep learning model that predicts various nuclear observables, including binding and decay energies, and nuclear charge radii. The model is trained using a multi-task approach with shared representations and obtains state-of-the-art performance, achieving levels of precision that are crucial for understanding fundamental phenomena in...
At BESIII, the electromagnetic form factors (EMFFs) and the pair production cross sections of various baryons have been studied. The proton EMFF ratio |GE/GM| is determined precisely and line-shape of |GE| is obtained for the first time. The recent results of neutron EMFFs at BESIII show great improvement comparing with previous experiments. Cross sections of various baryon pairs (Lambda,...
The SABRE experiment aims to detect an annual rate modulation from dark matter interactions in ultra-high purity NaI(Tl) crystals in order to provide a model independent test of the signal observed by DAMA/LIBRA. It is made up of two separate detectors that rely on joint crystal R&D activity; SABRE South located at the Stawell Underground Physics Laboratory (SUPL), in regional Victoria,...
Two-color ($N_c=2$) QCD world is one of the useful testing grounds to delineate cold and dense QCD matter, since the lattice QCD simulation is straightforwardly applicable thanks to the disappearance of the sign problem. Motivated by recent numerical results from the lattice QCD activities, I am being investigating properties of dense two-color QCD by constructing the linear sigma model (LSM)....
Heavy-ion collisions are a gateway to understanding quantum chromodynamics under extreme conditions. At such high energies, heavy quarks become important, and via the use of effective field theories, their behaviour can be related to a correlator of chromoelectric fields. Studying it in the high-temperature background relevant for heavy-ion collisions lets one, for example, extract the...
The color/quark deconfinement is one of the remarkable features of QCD phase transitions, with the observation of (strongly coupled) quark-gluon plasma in the heavy-ion collision experiments. In phenomenology, the deconfinement phase transition corresponds to the Polyakov loop which symbols the glue dynamics.
In this talk, I will discuss the relevance of the Polyakov loop for the QCD...
The rare radiative $K^+\to\pi^+\ell^+\ell^-$ decays ($\ell=e,\mu$) provide experimental access to the $K^+\to\pi^+\gamma^*$ transition. The relevant form factor is conventionally written in terms of two hadronic parameters, $a_+$ and $b_+$, which are being measured by NA62 in both electron and muon channels. Comparing the two channels allows for a stringent test of lepton-flavor universality....
In high energy physics, it is challenging to estimate precisely the trials factor for a resonance search with an unspecified mass. A relatively new approach is to model the significance derived from the likelihood ratio (fit a spectrum with and without the presence of the resonance in the statistical model) as a Gaussian Process. The knowledge of the covariance of the significance between...
Using the potential non-relativistic quantum chromodynamics (pNRQCD) effective field theory in an open quantum system, we derive a Lindblad equation for the evolution of the heavy-quarkonium reduced density matrix that is accurate to next-to-leading order (NLO) in the ratio of the binding energy of the state to the temperature of the medium [1]. The resulting NLO Lindblad equation can be used...
Since the EMC effect indicates modification of quark distribution in the nucleons inside the nucleus, the properties and structure of nucleons might be modified in the nucleus. However, it is still unclear. In order to correctly describe high-density nuclear matter in neutron stars, this problem should be also studied, as well as the nuclear force in dense nuclear matter.
We are planning to...
The T_cc^+ is a a doubly charmed tetraquark that lies very close to the D^* D meson thresholds. As such it can be described as a molecular bound state in an effective field theory (EFT) of heavy mesons. An EFT calculation of the width is in excellent agreement with experiment and also successfully reproduces the invariant mass spectrum of the D mesons in the three body decays of the T_cc^+....
The unfolding problem is to make inferences about the true particle spectrum based on smeared observations from a detector. This is an ill-posed inverse problem, where small changes in the smeared distribution can lead to large fluctuations in the unfolded distribution. The forward operator is the response matrix which models the detector response. In practice, the forward operator is rarely...
The FASTSUM collaboration has a long-standing project examining hadronic properties using anisotropic lattice QCD. I will introduce our efforts to determine the spectral properties of bottomonia at finite temperature using lattice NRQCD and describe how our newer simulations improve our control over systematic errors. Motivated by these efforts, I will discuss the temperature dependence of...
In recent years, machine learning and AI technologies have revolutionized physics, becoming essential in overcoming the enormous computational costs and time constraints faced by traditional methods. This talk will discuss their applications in lattice QCD and related fields. We will introduce new configuration generation methods for lattice QCD using gauge-covariant neural networks and...
Neutron scattering off neutron halos can provide important information about the internal structure of nuclei close to the neutron drip line. In this work, we use halo effective field theory to study the $s$-wave scattering of a neutron and the spin-parity $J^P=\frac{1}{2}^+$ one-neutron halo nuclei $^{11}\rm Be$, $^{15}\rm C$, and $^{19}\rm C$ at leading order. In the $J=1$ channel, the only...
Recently, two experiments in Hall C at Jefferson Lab finished data taking. One experiment focused on a precision measurement of the virtual photon asymmetry A$_1^n$ at large values of Bjorken-x (0.61 < x < 0.77) at various values of Q$^2$, and the other experiment measured the spin structure function g$_2^n$ over a large range of Bjorken-x (0.20 < x < 0.95) to extract the Q$^2$ evolutions of...
I will review the status of theoretical development and analysis results related to searches for the $\pi_1$ exotic hybrid meson.
I'll discuss the symmetries of large N QCD, focusing on how a 1-form symmetry emerges at large N, as well as its connections to confinement, 't Hooft anomalies, and a consequent constraint on the phase diagram as a function of temperature.
In the presence of a deconfined medium, scattering amplitudes slightly change, leaving an imprint on jet production. Precise measurements of these modified jets thus infer knowledge of the QGP phase compared to standard perturbative QCD calculations. In this talk, we review the theory of jets and their modification in a deconfined plasma on the ground of perturbation theory. We introduce a...
The LHC Runs 5 and 6 will provide high luminosity pp and Pb-Pb collisions and options for pA and lighter AA systems are under study. ATLAS and CMS will upgrade their detectors during LS3, LHCb is planning a major upgrade for LS4. The ALICE Collaboration is proposing a completely new apparatus, ALICE 3, for the LHC Runs 5 and 6. The ALICE 3 detector consists of a large pixel-based tracking...
Recent measurements of polarization phenomena in relativistic heavy ion collisions have aroused a great interest in understanding dynamical spin evolution of the QCD matter. In particular, the spin alignment signature of $J/\psi$ has been recently observed in Pb-Pb collisions at LHC, which may infer nontrivial spin transport of quarkonia in quark gluon plasmas. Consequently, we study the...
Non-Abelian confinement of quarks in QCD is responsible for 98% of the energy density of visible matter in the Universe whereas the Higgs mechanism is responsible for the remaining 2%. Dark matter has five times the energy density of normal matter so we consider dark matter energy models where non-Abelian confinement of dark quarks also occurs. Dark confinement enables a new feature where...
The ALICE experiment has provided numerous insights into the properties and behavior of the quark-gluon plasma (QGP), greatly advancing our understanding of this state of matter in the early universe and the fundamental properties of QCD matter under extreme conditions. This talk will present the latest ALICE results covering topics such as collective dynamics, correlations and fluctuations,...
I will assume the dark sector is described by QCD-like confining gauge theories, with dark pions and dark baryons that can make cold dark matter (CDM) of the Universe. If dark pion masses are in electroweak (EW) scale and they interact the SM sector through singlet scalar exchanges, they become weakly-interactin-massive-particla (WIMP) DM. If the dark pion mass becomes sub-GeV and the...
We estimate the magnetic moment of electron neutrinos by computing the neutrino chirality flip rate that can occur in the core of a strange quark matter neutron star at birth. We show that this process allows neutrinos to anisotropically escape thus inducing the star kick velocity. The process is not subject to the no-go theorem since, although the flip from left- to right-handed neutrinos...
The dominant contribution to the theoretical uncertainty in the extracted weak parameters of the Standard Model comes from the hadronic uncertainties in the electroweak box diagrams, i.e. $\gamma-W^\pm/Z$ exchange diagrams. A dispersive analysis relates the box diagrams to the parity-odd structure function, $F_3$, for which the experimental data either do not exist or belong to a separate...
Assesment of values and uncertainties of the cross section of quasi-elastic scattering of electron (anti-)neutrinos on nucleons, also known as inverse beta decay in the case of antineutrinos.
The parton structure of the nucleon and pion is investigated in a model that allows one to see if the dressing of quarks can, by itself, produce realistic gluon contributions to momentum fractions, spin, mass distributions and mass radii. The model is the Dyson-Schwinger Equations in Rainbow-Ladder truncation and involves calculation of the second Mellin moment of certain GPDs. For the...
The strong interaction between a hyperon and a nucleon (YN)
is able to be studied by spectroscopy of hypernuclei,
which are nuclei with a bound hyperon or hyperons.
Hypernuclear spectroscopy at Jefferson Lab in the US
uses an electron scattering to precisely measure
the masses of Lambda hypernuclei.
The resolution and accuracy for the mass measurement
are 0.6 (FWHM) and <0.1 MeV,...
In this talk, I will report our recent achievements based on refs. [1,2]. Below are highlights from our results.
Perturbative Confinement under Imaginary Rotation
We perturbatively calculated the Polyakov loop potential at high $T$ with imaginary angular velocity. Under the rapid imaginary rotation, the potential favors zero Polyakov loop, i.e. confinement. In ref. [1], we found a...
Understanding hadron formation is one of the fundamental goals of hadron physics. It is essential way to investigate the effective degrees of freedom of hadrons such as the quark-quark correlation, namely the diquark correlation. Spectroscopic observations of charmed and multi-strange baryons can provide a unique opportunity to study diquark correlation. Systematic studies of charmed and...
In four-dimensional (4D) QCD, quark confinement is characterized by one-dimensional color-electric flux-tube formation, which leads to a linear interquark potential. The flux-tube formation implies a possibility of low-dimensionalization of 4D QCD. We propose a new gauge fixing of ``dimensional reduction (DR) gauge" defined so as to minimize
$R_{\mathrm{DR}}~\equiv~\int...
In this talk I will show you our recent results on the quark pairing gap in sQGP by solving the coupled Dyson-Schwinger equations for quark propagator and quark gluon vertex in the Nambu-Gorkov basis which is widely applied to study the color superconductivity. We acquire a quark pairing gap at small chemical potential which is related to the dimension two gluon condensate and...
In 2020-24, the observation of $c\bar c c\bar c$ exotic hadrons (di-$J/\psi$) was reported by LHCb, CMS, and ATLAS. Their energies are above the 2$m(J/\psi)$ threshold, $X(6200, 6600, 6900)$. Here, we investigate these states, focusing on the quark-Pauli blocking effect. We show that this effect can make a structure in the S-wave $c\bar c c\bar c$ systems. The Pauli blocking over the quarks...
Based on the vector meson dominance model, we conducted a theoretical study on the timelike electromagnetic form factors of hyperons. We found that the timelike electromagnetic form factors of hyperons also exhibit significant oscillatory behavior, but further theoretical and experimental research is needed. Additionally, this talk will provide discussions on the reasons for the oscillatory behavior.
We present the polarization measurement of the $\Xi^-$ baryon produced in the $^{12}C(K^-,K^+)\Xi^-$ reaction and in the $p(K^-,K^+)\Xi^-$ reaction at the center-of-mass energy $\sqrt s=2.15$ GeV/c$^2$. We have collected 300k $^{12}C(K^-,K^+)\Xi^-$ events and reconstructed 30k $\Xi^-$ with a 1.8 GeV/c $K^-$ beam in J-PARC E42.
The polarization analysis of the $^{12}C$ dataset will provide...
We study the space-time evolution of electromagnetic fields along with the azimuthal fluctuations of these fields and their correlation with the initial matter geometry specified by the participant plane in the presence of finite electric (σ ) and chiral magnetic (σχ ) conductivities in Ru + Ru and Zr + Zr collisions at √sNN = 200 GeV. We observe the partially asymmetric behavior of the...
The coherent elastic scattering of neutrinos from nuclei can act as a
probe of not only standard model and nuclear physics but also beyond-standard model physics - including some models of dark matter. To make the most of future high-statistics experiments, we require precise predictions for the scattering cross sections. I will present results of nuclear shell model calculations that we've...
Effective String Theory (EST) represents a powerful non-perturbative approach to describe confinement in Yang-Mills theory by modeling the confining flux tube connecting a static quark-anti-quark pair as a thin vibrating string. EST calculations are usually tackled using zeta-function regularization; however, there are situations (for instance, the study of the shape of the flux tube or of the...
Simulations of lattice QCD have emerged as the most reliable tool for making predictions of the low energy properties of hadrons and of quarks and gluons composing them with control over all systematic uncertainties. In this review, I will cover the status of the calculations of quantities that are needed in the analysis of neutrinos scattering off nuclear targets. These include the axial...
We measured double-strangeness systems produced in the $^{12}C(K^{-},K^{+})X$ reaction which involves a $\Xi^{-}$ hyperon and a $\Lambda\Lambda$ hyperon pair at the J-PARC using 1.8 GeV/$\mathit{c}$ $K^{-}$ beam.
The E42 experiment which has a primary goal to search for the H-dibaryon collected 300K $^{12}C(K^{-}, K^{+})X$ reaction events containing thousands of $\Lambda\Lambda$ events...
For decades now, low-energy models of QCD have shown indications that a crystalline quark phase could be stable at high chemical potentials. Beyond models, however, there are numerous difficulties in investigating such a hypothesis in full QCD, such as the sign problem. Functional methods do not suffer from the sign problem, and thus, can access the high-$\mu$ side of the QCD phase diagram. In...
We present a comprehensive investigation of leading-twist lightcone distribution amplitudes (LCDAs) and quasi distribution amplitudes (quasi-DAs) for light octet and decuplet baryons within large momentum effective theory (LaMET). In LaMET, LCDAs can be factorized in terms of a hard kernel and quasi-DAs that are defined as spatial correlators and calculable on Lattice QCD. To renormalize...
The residual local gauge symmetry is the local gauge symmetry remaining even after imposing the gauge fixing condition. Although this symmetry is “spontaneously broken” in the perturbative vacuum, it can be restored in the true confining vacuum of QCD. Therefore, a color confinement criterion is obtained as the condition of restoration of the residual local gauge symmetry, namely,...
Characterizing the internal structure of nucleons in terms of sea quarks and gluons is a challenging task in hadronic physics. Both theoretical and experimental studies have validated the impact of valence and sea on different properties of nucleon. We employed the statistical model to investigate the contribution of strange sea to the charge radii and quadrupole moment of nucleons. Here,...
We discuss a tantalizing possibility that misinterpretation of the reconstructed missing momentum may have yielded the observed discrepancies among measurements of the W-mass in different collider experiments. We introduce a proof-of-principle scenario characterized by a new physics particle, which can be produced associated with the W-boson in hadron collisions and contributes to the net...
Since the discovery of the complex potential of quarkonium at high temperatures, quarkonium has been regarded as an open quantum system within the quark-gluon plasma. Recently, a similar issue regarding in-medium bound states of impurities has also emerged in particle physics and cold atomic physics. In this talk, I will provide an overview of recent advancements in understanding key...
The bulk of visible mass emerges from nonperturbative dynamics within quantum chromodynamics (QCD) - the strong interaction sector of the Standard Model. Following many years of development and refinement, continuum and lattice Schwinger function methods have recently joined in revealing the three pillars that support this emergent hadron mass (EHM); namely, a nonzero gluon mass-scale, a...
Statistical methods play a crucial role in the data analysis and interpretation in particle physics experiments. As we deepen in the theory and build more complex experiments, new challenges arise in statistical practice. In this talk, we explore some of the open questions, new and old, and ongoing debates in statistical methodology as applied to particle physics research.
Hypothesis testing...
I will present an overview of recent lattice QCD results on the equation of state and phase diagram of strongly interacting matter, complemented by phenomenological extensions to high density and low temperature, to connect the heavy-ion and neutron star merger regimes.
Heavy quarks may be produced in the earliest stage of ultra-relativistic heavy-ion collisions, and may or may not bind into quarkonia. They probe the full evolution of the strongly-coupled medium created in these collisions.
In-medium quarkonia are subject to a dynamical melting process, which can be understood in terms of the static potential. EFT calculations predict a complex potential,...
The connection between power corrections to perturbative series and the factorial growth of the series coefficients is studied, leading to a more convergent packaging of perturbation theory. Results for quark masses and preliminary results for $\alpha_s$ are presented.
This is a personal account of some of the progress made in heavy quarkonium physics in the last 30 years from the perspective of non relativistic effective field theories.
We make the point of where we stand with the 30 years of confinement and we summarize current challenges and perspectives from a shapshot of this edition.
In this talk we show that inclusive single-spin asymmetries (SSAs) with transversely
polarized electrons or protons at a future electron ion collider (EIC) are sensitive to new physics
contributions to electroweak dipole operators of electrons and quarks. We use the Standard Model
Effective Field Theory (SMEFT) to parameterize possible heavy new physics contributions to these
couplings. We...
I will be participating in the round table on "PDF, TMD, GDP, at a crossroad: open problems and perspective, impact on LHC studies and new physics search, impact on EIC and EICC hadron structure studies"
We discuss searches for new physics at both the LHC and the EIC within
the Standard Model Effective Field Theory (SMEFT) framework. Drell-Yan
probes of the SMEFT parameter space suffer from degeneracies due to
the limited number of measured observables. The EIC, with the
potential to polarize both beams, can resolve these blind spots in the
LHC coverage. We quantify the important role...
