Nuclear Theory·nucl-th

Wednesday·November 27, 2019

5 papers—4 primary·1 cross-listed

01
[Submitted on 25 Nov 2019]
Valence structures of light and strange mesons from the basis light-front quantization framework
Shaoyang Jia🇺🇸 · James P. Vary🇺🇸
We apply the basis light-front quantization framework to solve for the structures of mesons with light and strange valence quarks. Our approach treats mesons as relativistic bound states with quarks confined in both the transverse direction and the light-front longitudinal direction. The spin-orbit interactions of these confined quarks are further specified by the Nambu--Jona-Lasinio model. We address the $U (1)_{A}$ axial anomaly by including the Kobayashi-Maskawa-'t Hooft interaction regularized by our basis. We present the structures of the pion, the kaon, the eta meson, and the eta-prime meson in terms of their valence light-front wave functions obtained from the eigenvalue problem of our light-front Hamiltonian.
Comments:
Parallel session talk proceeding for the 18th International Conference on Hadron Spectroscopy and Structure (HADRON2019)
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Theory (hep-th)
arXiv:
1911.11191 [pdf]
1 citation
02
[Submitted on 26 Nov 2019]
Neutrino-Deuteron Reactions at Solar Neutrino Energies in Pionless Effective Field Theory with Dibaryon Fields
Shung-Ichi Ando🇰🇷 · Young-Ho Song🇰🇷 · Chang Ho Hyun🇰🇷
We study breakup of the deuteron induced by neutrinos in the neutral $ν d \to ν n p$ , $ν ˉ d \to ν ˉ n p$ and the charged $ν ˉ d \to e^{+} nn$ , $ν d \to e^{-} pp$ processes. Pionless effective field theory with dibaryon fields is used to calculate the total cross sections for neutrino energies $E_{ν}$ from threshold to 20 MeV. Amplitudes are expanded up to next-to-leading order, and the partial wave is truncated at $P$ -waves. The Coulomb interaction between two protons is included nonperturbatively in the reaction amplitudes, and an analytic expression of the amplitudes is obtained. The contribution of the next-to-leading order to the total cross section is in the range of 5.2 $-$ 9.9\% in magnitude, and that of the $P$ -wave is 2.4 $-$ 2.8\% at $E_{ν} = 20$ MeV. Uncertainty arising from an axial isovector low-energy constant is estimated to be on the order of 1\%.
Comments:
25 pages, 5 figures
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
arXiv:
1911.11307 [pdf]
PRC(2020)·11 citations
03
[Submitted on 26 Nov 2019]
The eikonal model of reactions involving exotic nuclei; Roy Glauber's legacy in today's nuclear physics
Pierre Capel
In this contribution, the eikonal approximation developed by Roy Glauber to describe high-energy quantum collisions is presented. This approximation has been-and still is-extensively used to analyse reaction measurements performed to study the structure of nuclei far from stability. This presentation focuses more particularly on the application of the eikonal approximation to the study of halo nuclei in modern nuclear physics. To emphasise Roy Glauber's legacy in today's nuclear physics, recent extensions of this model are reviewed.
Comments:
Contribution to the proceedings of 24th edition of the European Few-Body Conference (Surrey, UK, 2-4 September 2019). 14 pages, 9 figures. Minor corrections to the first version following the Referee's comments
Subjects:
Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex); History and Philosophy of Physics (physics.hist-ph)
arXiv:
1911.11446 [pdf]
SciPost Phys.Proc.(2020)·4 citations
04
[Submitted on 26 Nov 2019]
Parton Distribution Functions of Heavy Mesons on the Light Front
Jiangshan Lan🇨🇳 · Chandan Mondal🇨🇳 · Meijian Li🇺🇸 · Yang Li🇺🇸 · Shuo Tang🇺🇸 · Xingbo Zhao🇨🇳 · James P. Vary🇺🇸
The parton distribution functions (PDFs) of heavy mesons are evaluated from their light-front wave functions, which are obtained from a basis light-front quantization in the leading Fock sector representation. We consider the mass eigenstates from an effective Hamiltonian consisting of the confining potential adopted from light-front holography in the transverse direction, a longitudinal confinement, and a one-gluon exchange interaction with running coupling. We present the gluon and the sea quark PDFs which we generate dynamically from the QCD evolution of the valence quark distributions.
Comments:
13 pages, 8 figures
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
arXiv:
1911.11676 [pdf]
PRD(2020)·68 citations

Affiliations

first authorsco-authorsvia INSPIRE

Valence structures of light and strange mesons from the basis light-front quantization framework

Neutrino-Deuteron Reactions at Solar Neutrino Energies in Pionless Effective Field Theory with Dibaryon Fields

The eikonal model of reactions involving exotic nuclei; Roy Glauber's legacy in today's nuclear physics

Parton Distribution Functions of Heavy Mesons on the Light Front

Affiliations