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Nuclear Theory·nucl-th

Tuesday·December 6, 2016

15 papers—11 primary·4 cross-listed

All15Primary11Cross-lists4
  1. 12

    [Submitted on 29 Nov 2016] (cross-list from hep-ph)

    Nucleon spin-averaged forward virtual Compton tensor at large

    Richard J. Hill🇨🇦 · Gil Paz🇺🇸

    The nucleon spin-averaged forward virtual Compton tensor determines important physical quantities such as electromagnetically-induced mass differences of nucleons, and two-photon exchange contributions in hydrogen spectroscopy. It depends on two kinematic variables: , the virtual photon energy in the proton rest frame, and , the photon's invariant four-momentum squared. Using the operator product expansion, we calculate the tensor's large- behavior for , including for the first time the full spin-2 contribution and correcting a previous result in the literature for the spin-0 contribution. Implications for the proton radius puzzle are discussed.

    Comments:
    23 pages, 11 figures. v2: journal version, typo in Eq.(15) corrected, Fig.11 updated with same inputs as Fig.10
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1611.09917 [pdf]
    PRD(2017)·44 citations
  2. 13

    [Submitted on 3 Dec 2016] (cross-list from nucl-ex)

    Spins in Exotic Nuclei: RI-beam Experiments with Polarized Targets

    Tomohiro Uesaka

    Spin-degrees of freedom play a significant role in exotic nuclei. Scattering with polarized protons has potential as a powerful tool to explore the spin effects in nuclei. This lecture note discusses the background, current status, and future prospects of experimental studies with spin polarized targets and radioactive ion beams.

    Comments:
    Lecture note of "Rewriting Nuclear Physics textbooks: 30 years with radioactive ion beam physics", July 2015, Pisa, Italy
    Subjects:
    Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1612.00911 [pdf]
    Eur.Phys.J.Plus(2016)·3 citations
  3. 14

    [Submitted on 4 Dec 2016] (cross-list from nucl-ex)

    Systematic study of symmetric cumulants at = 200 GeV in Au+Au collision using transport approach

    Md. Nasim🇺🇸

    Measurement of 4-particle symmetric cumulants has been considered to be a good tool to study the correlations between amplitudes of different orders of anisotropic flow harmonics in the heavy-ion collision. These new observables not yet been measured at RHIC. Using A Multi-Phase Transport model, a set of predictions for the centrality dependence of the normalized 4-particle symmetric cumulants in Au+Au collisions at = 200 GeV has been given. In addition, the effects of shear viscosity and hadronic rescattering on the magnitude of symmetric cumulants are discussed using AMPT model at = 200 GeV. It is shown that is found to be more sensitive to hadronic rescattering, whereas is more sensitive to the shear viscosity. Rapidity dependence of symmetric cumulants is also shown. A relation between symmetric cumulant and event plane correlation is investigated using AMPT model.

    Comments:
    7 pages, 7 figures, to be published in Phys. Rev. C
    Subjects:
    Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1612.01066 [pdf]
    PRC(2017)·16 citations
  4. 15

    [Submitted on 4 Dec 2016] (cross-list from hep-ph)

    An algebraic model for the pion's valence-quark GPD

    N. Chouika🇫🇷 · C. Mezrag🇺🇸 · H. Moutarde🇫🇷 · J. Rodríguez-Quintero🇪🇸

    We briefly report on a recent computation, with the help of a fruitful algebraic model, sketching the pion valence dressed-quark generalized parton distribution. Then, preliminary, we introduce on a sensible procedure to get reliable results in both Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) and Efremov-Radyushkin-Brodsky-Lepage (ERBL) kinematical regions, grounded on the GPD overlap representation and its parametrization of a Radon transform of the so-called double distribution (DD).

    Comments:
    8 pages, 4 figues, Light Cone 2016
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1612.01176 [pdf]
    Few Body Syst.(2017)·6 citations

Affiliations

first authorsco-authorsvia INSPIRE