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Nuclear Theory·nucl-th

Thursday·April 22, 2021

6 papers—2 primary·4 cross-listed

All6Primary2Cross-lists4
  1. 03

    [Submitted on 20 Apr 2021] (cross-list from math.CA)

    An Exact Integral-to-Sum Relation for Products of Bessel Functions

    Oliver H. E. Philcox🇺🇸 · Zachary Slepian🇺🇸

    A useful identity relating the infinite sum of two Bessel functions to their infinite integral was discovered in Dominici et al. (2012). Here, we extend this result to products of Bessel functions, and show it can be straightforwardly proven using the Abel-Plana theorem, or the Poisson summation formula. For , the proof is much simpler than that of Dominici et al., and significantly enlarges the range of validity.

    Comments:
    15 pages, 1 figure. Submitted to Proc. Roy. Soc. A
    Subjects:
    math.CA (math.CA); Cosmology and Nongalactic Astrophysics (astro-ph.CO); High Energy Physics — Theory (hep-th); Mathematical Physics (math-ph); math.MP (math.MP); Nuclear Theory (nucl-th)
    arXiv:
    2104.10169 [pdf]
    Proc.Roy.Soc.Lond.A(2021)·4 citations
  2. 04

    [Submitted on 20 Apr 2021] (cross-list from hep-ph)

    Semileptonic transitions

    Zhao-Qian Yao🇨🇳 · Daniele Binosi🇮🇹 · Zhu-Fang Cui🇨🇳 · Craig D. Roberts🇨🇳

    Using a systematic, symmetry-preserving continuum approach to the Standard Model strong-interaction bound-state problem, we deliver parameter-free predictions for all semileptonic transition form factors on the complete domains of empirically accessible momentum transfers. Working with branching fractions calculated therefrom, the following values of the ratios for over final states are obtained: and . Combined with other recent results, our analysis confirms a discrepancy between the Standard Model prediction for and the single available experimental result.

    Comments:
    8 pages, 4 figures, 5 tables
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); High Energy Physics — Lattice (hep-lat); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2104.10261 [pdf]
    PLB(2021)·25 citations
  3. 05

    [Submitted on 21 Apr 2021] (cross-list from hep-ph)

    The axion-baryon coupling in SU(3) heavy baryon chiral perturbation theory

    Thomas Vonk🇩🇪 · Feng-Kun Guo🇨🇳 · Ulf-G. Meißner🇩🇪

    In the past, the axion-nucleon coupling has been calculated in the framework of SU(2) heavy baryon chiral perturbation theory up to third order in the chiral power counting. Here, we extend these earlier studies to the case of heavy baryon chiral perturbation theory with SU(3) flavor symmetry and derive the axion coupling to the full SU(3) baryon octet, showing that the axion also significantly couples to hyperons. As studies on dense nuclear matter suggest the possible existence of hyperons in stellar objects such as neutron stars, our results should have phenomenological implications related to the so-called axion window.

    Comments:
    45 pages, 1 figure
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Lattice (hep-lat); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    2104.10413 [pdf]
    JHEP(2021)·25 citations
  4. 06

    [Submitted on 21 Apr 2021] (cross-list from hep-ph)

    The SuSA model for neutrino oscillation experiments: from quasielastic scattering to the resonance region

    Maria B. Barbaro🇮🇹 · Arturo De Pace🇮🇹 · Luisa Fiume🇮🇹

    High precision studies of Beyond-Standard-Model physics through accelerator-based neutrino oscillation experiments require a very accurate description of neutrino-nucleus cross sections in a broad energy region, going from quasielastic scattering up to deep inelastic scattering. In this work we focus on the following processes: quasielastic scattering, two-particle-two-hole excitations, and the excitation of the first (Delta) and second (Roper) resonances of the nucleon. The nuclear model is fully relativistic and includes both one- and two-body currents. We compare our results with recent T2K and MicroBooNE data on carbon and argon targets, and present predictions for DUNE kinematics.

    Comments:
    23 pages, 8 figures. Minor revisions in the text. Version accepted for publication on Universe Special Issue: "Nuclear Issues for Neutrino Physics". Misprint corrected in Eq.10
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2104.10472 [pdf]
    Universe(2021)·15 citations

Affiliations

first authorsco-authorsvia INSPIRE