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Jarah Evslin (Institute of Modern Physics, CAS)25/11/2024, 14:00Oral
In the instant-time formulation of quantum field theory, solitons correspond to states. We present a new formalism for treating these states. The formalism is much simpler and easier to use than previous formalisms, making many previously impractical problems now practical. We have used it to calculate soliton masses, spectra, form factors, and scattering amplitudes, as well as the decay...
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Joรฃo Pacheco de Melo (LFTC - Universidade Cruzeiro do Sul - UNICID)25/11/2024, 14:30Oral
The off-shell pion electromagnetic form factors are explored
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using phenomenological relativistic constituent quark models. These composite pion models feature
massive, structureless blue quark and antiquark, allowing the computation of microscopic form factors
via the Mandelstam approach. Each model relies on two parameters which are determined by closely reproducing the pion decay... -
Dingyu Shao (Fudan University)25/11/2024, 15:00Oral
We apply the joint threshold and transverse momentum dependent (TMD)
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factorization theorem to introduce new threshold-TMD distribution functions, including threshold-TMD parton distribution functions (PDFs) and fragmentation functions (FFs). We apply Soft-Collinear Effective Theory and renormalization group methods to perform QCD evolution for both threshold-TMD PDFs and FFs. We show the... -
็ณ ๆน (ๅคๆฆๅคงๅญฆ)25/11/2024, 16:00Oral
In this study, we explore the azimuthal angle decorrelation of lepton-jet pairs in e-p and e-A collisions as a means for precision measurements of the three-dimensional structure of bound and free nucleons. Utilizing soft-collinear effective theory, we perform the first-ever resummation of this process in e-p collisions at NNLL accuracy using a recoil-free jet axis. Our results are validated...
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ๅฟ็ฆ ้ (้ฆๆธฏไธญๆๅคงๅญฆ ๆทฑๅณ)25/11/2024, 16:20Oral
In large-momentum effective theory (LaMET), the transverse-momentum-dependent (TMD) light-front wave functions and soft functions can be extracted from the simulation of a four-quark form factor and equal-time correlation functions. In this work, using expansion by regions we provide a one-loop proof of TMD factorization of the form factor. For the one-loop validation, we also present a...
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Hongxin Dong (NNU)25/11/2024, 16:40Oral
We will present a global analysis of Sivers function, transversity distribution functions and Collins fragmentation functions within TMD factorization. This analysis encompasses the latest data sets from semi-inclusive deep inelastic scattering, Drell-Yan, and $W^{\pm}/Z$-boson production as recently reported by the COMPASS and STAR Collaborations. Upon integrating this new data into our...
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Eric Andreas Vivoda (Department of Physics, Faculty of Science, University of Zagreb), Sanjin Benic (University of Zagreb)25/11/2024, 17:00Oral
Nuclear dependence of Single Transverse Spin Asymmetry (STSA) in $p^โ p$ and $p^โ A$ collisions is still a standing mystery. Recent results by PHENIX ($A^{-1/3}$) [1] and STAR ($A^0$) [2] collaborations posses strikingly different nuclear scaling which suggest that the dominant underlying mechanism for STSA may vary with the kinematics of the collision. In the forward regime, where the gluon...
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ไธๅนณ ๅ (่ฟไปฃ็ฉ็ๆ)25/11/2024, 17:20Poster
We solve the nucleon's wave functions as eigenstates of the light-front quantum chromodynamics (QCD) Hamiltonian for the first time, using a fully relativistic and nonperturbative approach based on light-front quantization, without an explicit confining potential. These eigenstates are determined for the three-quark, three-quark-gluon, and three-quark-quark-antiquark Fock sectors, making them...
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Kamil Serafin (Tufts University)26/11/2024, 14:00Invited
The most challenging aspect of Quantum Chromodynamics (QCD) is perhaps the complexity of calculations required to obtain precise results. For example, ab initio Lattice QCD calculations demand expensive computations on large supercomputers. Yet, existing machines are still not sufficiently powerful to fully address many interesting problems such as structure functions of hadrons, or...
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Maria Gomez Rocha26/11/2024, 14:30
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Meijian Li (IGFAE)26/11/2024, 15:00Invited
Using a non-perturbative light-front Hamiltonian approach, we investigate the scattering and gluon emission of dressed quark states inside a SU(3) colored background field. We consider the scenario in deep inelastic scattering and in heavy ion collisions, where the quark originates from far outside the background field and is described by the light-front wavefunction of the QCD eigenstate in...
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Yao Ji (The Chinese University of Hong Kong, Shenzhen)26/11/2024, 16:00Oral
In this talk, I will present our calculation of kinematic power corrections $t/Q^2$ and $m^2/Q^2$ to the amplitude of deeply-virtual Compton scattering to the twist-six accuracy on a nucleon target.
Phenomenologically, this result reduces an important source of uncertainties in the QCD predictions for intermediate momentum transfers $Q^2 \sim 1 - 10 ~{\rm GeV}^2$, accessible in the existing...
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Sangyeong Son (Kyungpook National University)26/11/2024, 16:30Oral
The non-diagonal hard exclusive reactions admitting a description in terms of generalized parton distributions (GPDs) with transition $N\to\Delta, N^*$ provide insight into the internal dynamics of hadron excitations. A unified description of these reactions in the complete resonance region can be performed by introducing the concept of $N \to N \pi$ transition GPDs.
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In this study, we... -
Dr Zi-Yan Yang26/11/2024, 16:50Oral
The observation of the $T_{c\bar{s}}(2900)$ indicates the potential existence of strange double charm pentaquarks based on the heavy antidiquark symmetry. We systematically study
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the mass spectra of strange double charm pentaquarks with strangeness $S=-1$ in both molecular and compact structures for quantum numbers $J^{P}=1/2^{-}$, $3/2^{-}$, $5/2^{-}$. By constructing the interpolating... -
Baiyang Zhang (ๆฒณๅๅคงๅญฆ)26/11/2024, 17:10Oral
The $SU(N)$ Yang-Mills theory compactified on $\mathbb{R}^3 \times \mathbb{S}^1_L$ with small $L$ has many merits, for example the long range effective theory is weakly coupled and adopts rich topological structures, making it semi-classically solvable.
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Due to the $SU(N) \to U(1)^{N-1}$ symmetry breaking by gauge holonomy, the low-energy effective theory can be described in terms of unbroken... -
Hailong Fu (ITP)26/11/2024, 17:30Oral
Numerous low-lying excited hadrons can only decay into final states containing one or more photons, making them challenging to detect in experiments conducted at the Large Hadron Collider. Examples of such particles include the bottom partners of the $D^โ_ {s0}(2317)$ and $D_{s1}(2460)$, whose masses have been accurately predicted through heavy quark flavor symmetry and lattice calculations....
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Jianing Li (Central China Normal University)26/11/2024, 17:50Oral
The transport properties of dense nucleon matter at low temperatures are important but have rarely been studied in nuclear physics and astrophysics. In this work, we present a primary study of both bulk and shear viscosities of dense nucleon matter within the framework of the Boltzmann equation. To describe the static properties of nucleon matter, we apply the Walecka model in the mean-field...
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Qintao Song27/11/2024, 14:00Invited
We study the energy-momentum tensor of spin-0 and spin-1/2 hadrons in momentum space. We parametrize this object in terms of so-called gravitational transverse-momentum distributions, and we identify in the quark sector the relations between the latter and the usual transverse-momentum distributions. Focusing on particular components of the energy-momentum tensor, we study momentum densities,...
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Kirill Semenov-Tyan-Shanskiy (Kyungpook National University, Daegu, Korea)27/11/2024, 14:30Invited
Transition GPDs describe matrix elements of nonlocal partonic QCD operators between ground and excited baryon states and provide new tools for quantifying and interpreting the structure of baryon resonances in QCD.
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We consider a description of non-diagonal Deeply Virtual Compton Scattering process involving a transition between anucleon and a nucleon resonance in the pion-nucleon system... -
Yu Jia27/11/2024, 15:00Oral
The meson's boundstate equation in two dimensional QCD under large Nc limit (QCD2) are exactly solvable in both light-front quantization and equal time quantization. In the meanwhile, QCD2 captures some key features of realistic QCD in four dimension, such as color confinement, nonzero quark condensate. QCD2 become an ideal theoretical laboratory for...
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Abigail Rodrigues Castro (CEA-Saclay)Oral
This work presents a systematic feasibility study on measuring backward deeply virtual Compton scattering (bDVCS) on the pion through Sullivan processes, within the framework of collinear QCD factorization. In this approach, pion-to-photon transition distribution amplitudes (TDAs) are used to describe the photonic structure of the pion. Using the TDA framework considering overlap of...
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Yiping Liu
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Yang Li (University of Science and Technology of China)Invited
The hadronic energy-momentum tensor encodes the energy and stress distributions within hadrons. In this talk, I will report our recent advancements on the computation of gravitational form factor D(Q^2) in holographic QCD. Our method exploits the remarkable correspondence between semi-classical light-front QCD and semi-classical field theories in wrapped spacetime in 5D. The use of light-front...
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