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Nuclear Theory·nucl-th

Monday·July 29, 2019

9 papers—7 primary·2 cross-listed

All9Primary7Cross-lists2
  1. 08

    [Submitted on 26 Jul 2019] (cross-list from hep-ph)

    Lepton angular distributions of Drell-Yan process in pQCD and a geometric approach

    Wen-Chen Chang🇹🇼 · Randall Evan McClellan🇺🇸 · Jen-Chieh Peng🇺🇸 · Oleg Teryaev🇷🇺

    The lepton angular distributions of the Drell-Yan process in the fixed-target experiments are investigated by NLO and NNLO perturbative QCD. We present the calculated angular parameters , , and the degree of violation of the Lam-Tung relation, , for the E615 experiment as well as predictions for the COMPASS experiment. Many salient features of transverse momentum and rapidity dependence could be qualitatively understood by a geometric approach.

    Comments:
    5 pages, 2 figures; contribution to the proceedings of the XXVII. International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2019), April 8-12, 2019,Torino, Italy
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1907.11356 [pdf]
    PoS(2019)·1 citation
  2. 09

    [Submitted on 26 Jul 2019] (cross-list from nucl-ex)

    Single-particle shell strengths near the doubly magic nucleus Ni and the Ni(p,)Cu reaction rate in explosive astrophysical burning

    D. Kahl · P. J. Woods · T. Poxon-Pearson · F. M. Nunes · B. A. Brown · H. Schatz · T. Baumann · D. Bazin · J. A. Belarge · P. C. Bender · B. Elman · A. Estrade and 15 other authors

    Angle-integrated cross-section measurements of the Ni(d,n) and (d,p) stripping reactions have been performed to determine the single-particle strengths of low-lying excited states in the mirror nuclei pair Cu-Ni situated adjacent to the doubly magic nucleus Ni. The reactions were studied in inverse kinematics utilizing a beam of radioactive Ni ions in conjunction with the GRETINA -array. Spectroscopic factors are compared with new shell-model calculations using a full model space with the GPFX1A Hamiltonian for the isospin-conserving strong interaction plus Coulomb and charge-dependent Hamiltonians. These results were used to set new constraints on the Ni(p,)Cu reaction rate for explosive burning conditions in x-ray bursts, where Ni represents a key waiting point in the astrophysical rp-process.

    Comments:
    Final version accepted and published. 5 pages, 2 figures
    Subjects:
    Nuclear Experiment (nucl-ex); Solar and Stellar Astrophysics (astro-ph.SR); Nuclear Theory (nucl-th)
    arXiv:
    1907.11665 [pdf]
    PLB(2019)·19 citations

Affiliations

first authorsco-authorsvia INSPIRE