Joint 20th International Workshop on Hadron Structure and Spectroscopy and 5th workshop on Correlations in Partonic and Hadronic Interactions

Session

Friday Morning

4 Oct 2024, 09:00

"Pomegranate" hall (Ramada Hotel & Suites by Wyndham, Yerevan, Armenia)

27. Electron-Ion Collider in China

Jinlong Zhang (Shandong University)

04/10/2024, 09:00

In this talk, an overview of the physics program, the detector conceptual design, and the project status will be presented. The Electron-Ion Collider in China (EicC) is a proposed high energy nuclear physics facility to be constructed based on the High Intensity heavy-ion Accelerator Facility (HIAF) in Huizhou, China. EicC will be able to place highly polarized ($\sim$80%) electrons in...

20. QCD physics in the Future Super Tau-Charm Facility

Xiao-Rui Lyu (University of Chinese Academy of Sciences)

04/10/2024, 09:25

The proposed super tau-charm facility (STCF) is a symmetric electron-positron collider, designed to provide $e^{+}{e}^{-}$ interactions at a center-of-mass energy from 2.0 to 7.0 GeV. This energy region corresponds to the transitions between non-perturbative quantum chromodynamics (QCD) and perturbative QCD. Hence, a large variety of topics in elementary particle physics can be pursued at STCF,...

45. Radiative correction for unpolarized SIDIS at COMPASS

Vendula Benesova (Charles University (CZ))

04/10/2024, 10:35

The transverse momentum squared $P_T^2$ distributions of charged hadrons produced in deep inelastic scattering and the azimuthal modulations in their angular distributions provide valuable insight into the transverse motion of partons. Using unpolarized semi-inclusive deep inelastic scattering data collected by the COMPASS Collaboration in 2016 and 2017 on proton target with longitudinally...

8. Measurement of $A_{LU}$ in semi-inclusive production of ${\pi }^{+}{K}^{-}$, $K^{+}{\pi }^{-}$, and $K^{+}{K}^{-}$ pairs in deep inelastic scattering with CLAS12

Connor Pecar (Duke University)

04/10/2024, 10:50

Semi-inclusive deep inelastic scattering (SIDIS) measurements provide crucial experimental insight into the three-dimensional momentum structure and spin structure of nucleons. The additional degree of freedom when observing two hadrons in the semi-inclusive final state allows for access to correlations between quark polarization and the angular momentum of final state hadrons through Dihadron...

62. New measurement of transverse spin effects in hadron production from muon-deuteron semi-inclusive DIS at COMPASS

Siranush Asatryan (A.Alikhanyan National Science Laboratory (AM))

04/10/2024, 11:05

One of the main objectives of extensive physics program of COMPASS experiment has been to conduct measurements of target-spin asymmetries in semi-inclusive (di-)hadron production in Deep Inelastic Scattering of high-energy muons off polarized targets. In 2022, the latest semi-inclusive DIS measurements were performed using a transversely polarized deuteron target and a 160 GeV/c muon beam....

46. Phenomenological comparison of Lattice calculations of the Collins-Soper kernel

Patrizio Pucci (Charles University (CZ), University of Turin (IT))

04/10/2024, 11:20

Relevant information about hadron structure is contained in nonperturbative functions called Transverse Momentum Depentend Parton Distribution Functions (TMD PDFs) and the Collins-Soper kernel, a universal function which regulates their scale evolution.
Usually these functions are obtained by modeling and fitting to experimental data but in recent years lattice calculations have calculated...

53. Results for Collins and Sivers Asymmetries in K0-Production from 2022 COMPASS Data

Artur Hoghmrtsyan (A.Alikhanyan National Science Laboratory (AM))

04/10/2024, 11:35

We present the preliminary results for the Collins and Sivers amplitudes of the transverse target spin asymmetries (TSAs) in production of neutral kaons ($K^0$) in semi-inclusive deep inelastic scattering. The results were obtained using the data accumulated at COMPASS in 2022 on a transversely polarized ${}^6$LiD target. The amplitudes were extracted using an unbinned maximum likelihood...

22. Preliminary HERMES results on the beam-spin induced polarization of Lambda and anti-Lambda hyperons produced in semi-inclusive DIS

Gevorg Nazaryan

04/10/2024, 11:50

We present a detailed study of the polarization transfer from a longitudinally polarized lepton beam to the Λ and Λ̄ hyperons produced in semi-inclusive deep-inelastic scattering (SIDIS). The spin-transfer coefficients DLZ and DLZ are extracted using a three-dimensional method, allowing independent measurement of the spin-transfer vector components in the Λ rest frame. The analysis is based on...

44. Transverse-Spin Dependent Azimuthal Asymmetries in COMPASS Drell-Yan data

Malgorzata Rozalia Niemiec (University of Warsaw (PL))

04/10/2024, 12:05

The investigation of Transverse-Spin Dependent Azimuthal Asymmetries in the Drell-Yan process provides a key insight into the spin-dependent structure of nucleons, particularly testing the restricted universality of Transverse-Momentum Dependent Parton Distribution Functions. During the 2015 and 2018 data-taking periods, the COMPASS Collaboration at CERN measured the ${\pi }^{-}$p $\rightarrow...

49. Inverse Kinematics Nucleon Knockout Measurements with a 45 GeV/c Carbon Beam

TIMUR ATOVULLAEV

04/10/2024, 12:20

Investigating the ground-state (g.s.) distributions of nucleons in atomic nuclei remains a key challenge in nuclear physics, often addressed through particle knockout reactions. In 2022, an experiment conducted at JINR utilized a 45 GeV/c carbon-12 beam incident on liquid hydrogen to explore the hard quasi-free 12C(p,2p)11B reaction in inverse kinematics. By tagging the reaction fragments, the...

52. Neutrino-nucleon Neutral Current scattering in the presence of Non-Standard Interaction

Mehran Dehpour (Charles University (CZ))

04/10/2024, 12:35

Advancements in precise neutrino experiments offer promising opportunities to explore new physics by examining the effects of Neutral Current Non-Standard Interactions between neutrinos and matter. While neutrino oscillation experiments have already imposed stringent limits on all vector NC NSI flavor elements, axial NC NSI remains elusive in these studies. However, neutrino-nucleon scattering...