Conveners
Nucleon Structure: A-2 / 26-Ns-1
- Yoshitaka Hatta
Nucleon Structure: C-2 / 27-Ns-2
- Itaru Nakagawa
Nucleon Structure: E-4 / 29-Ns-3
- Rik Yoshida
Carlos Munoz Camacho
(IPN-Orsay, CNRS/IN2P3)
26/07/2016, 14:50
The understanding of Quantum Chromodynamics (QCD) at large distances still remains one of the main outstanding problems of nuclear physics. Investigating the internal structure of hadrons provides a way to probe QCD in the non-perturbative domain and can help us unravel the spatial extensions of nature's building blocks. Deeply Virtual Compton Scattering (DVCS) is the easiest reaction that...
Qin-Tao Song
(High Energy Accelerator Research Organization(KEK), Sokendai)
26/07/2016, 15:20
The polarized deuteron has new structure functions in charged-lepton deep inelastic scattering due to its spin-one nature, and they are b1, b2, b3, and b4. The twist-two structure functions b1 and b2 are expressed by tensor-polarized parton distribution functions in the deuteron [1]. There is an approved experiment at JLab to measure them and it is expected to start in 2019. On the other hand,...
Chung-Wen Kao
(Chung-Yuan Christian University)
26/07/2016, 15:50
We derived the conditions on certain combinations of integrals of the fragmentation functions of pion using HERMES data for the sum of the charged pion multiplicities from semi-inclusive deep-inelastic scattering (SIDIS) off the deuteron target. In our derivation the nucleon parton distribution functions (PDFs) are assumed to be isospin SU(2) symmetric. Similar conditions have also been...
Kazuhiro Tanaka
(Juntendo University)
27/07/2016, 14:15
Exclusive Drell-Yan process, \pi^- p \to \mu^+ \mu^- n, may be measured using the high-intensity pion beams at J-PARC, and its QCD description is complementary to that for the deeply virtual meson production, \gamma^* p \to \pi N, at e.g., JLAB. The leading hard exclusive amplitude for exclusive Drell-Yan process was obtained by E.R. Berger, M. Diehl, and B. Pire [Phys. Lett. B523 (2001) 265]...
Takahiro Sawada
(Institute of Physics, Academia Sinica)
27/07/2016, 14:50
Since the winter of 2014, COMPASS collaboration at CERN have performed a series of Drell-Yan experiments using a high-intensity negative hadron beam with momentum 190-GeV/c impinging on a transversely polarised ammonia target and unpolarised aluminum and tungsten targets. The experiment provides the first-ever polarized Drell-Yan data, as well as greatly improved statistics for the unpolarised...
Kei Nagai
(Tokyo Institute of Technology)
27/07/2016, 15:50
The amount of u-bar and that of d-bar in the proton were assumed to be the same based on the flavor symmetry. However, the NMC experiment at CERN found, by deep inelastic muon scattering, that d-bar is dominant in the proton. The previous Drell-Yan experiment at Fermilab (E866) measured the ratio of d-bar to u-bar, namely flavor asymmetry, and showed that d-bar/u-bar is as asymmetric as 1.7 at...
Ashot Gasparian
(North Carolina A&T State University)
29/07/2016, 16:50
The proton charge radius (Rp) is one of the most fundamental quantities in physics. Precision knowledge of its value is critically important for both nuclear and atomic physics – especially for the spectroscopy of atomic hydrogen. Recent high precision measurements of Rp using the muonic hydrogen atom demonstrated up to eight standard deviation smaller value than the accepted average from all...
Harleen Dahiya
(Dr. B.R. Ambedkar National Institute of Technology Jalandhar)
29/07/2016, 17:20
Octet Baryon Quark Flavor Distribution Functions We investigate the quark flavor distribution functions of the octet baryons. In particular, the valence and sea quark flavor distribution functions of the scalar density matrix elements of octet baryons have been computed explicitly. The implications of chiral symmetry breaking and SU(3) symmetry breaking have been discussed in detail for the...
Bingxin Zhang
(Institute of High Energy Physics)
29/07/2016, 17:50
The momentum transfer dependence of the electromagnetic form factors is an important probe of the structure of hadrons at different scales. Using data samples collected with the BESIII detector at the BEPCII collider, we study the process of e+e- -> p bar{p} at 12 center-of-mass energies from 2232.4 to 3671.0 MeV. The Born cross section at these energy points are measured as well as the...
Hsiang-nan Li
(Academia Sinica)
29/07/2016, 18:20
We propose a new definition of a transverse-momentum-dependent wave function with simpler soft subtraction. The un-subtracted wave function involves two pieces of non-light-like Wilson links oriented in different directions, so that the rapidity singularity appearing in usual $k_T$ factorization is regularized, and the pinched singularity from Wilson-link self-energy corrections is alleviated...
