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Nuclear Theory·nucl-th

Friday·February 14, 2020

8 papers—5 primary·3 cross-listed

All8Primary5Cross-lists3
  1. 06

    [Submitted on 12 Feb 2020] (cross-list from hep-ph)

    Precise determination of proton magnetic radius from electron scattering data

    J. M. Alarcón🇪🇸 · D. W. Higinbotham🇺🇸 · C. Weiss🇺🇸

    We extract the proton magnetic radius from the high-precision electron-proton elastic scattering cross section data. Our theoretical framework combines dispersion analysis and chiral effective field theory and implements the dynamics governing the shape of the low- form factors. It allows us to use data up to 0.5 GeV for constraining the radii and overcomes the difficulties of empirical fits and extrapolation. We obtain a magnetic radius = 0.850 0.001 (fit 68%) 0.010 (theory full range) fm, significantly different from earlier results obtained from the same data, and close to the extracted electric radius = 0.842 0.002 (fit) 0.010 (theory) fm.

    Comments:
    5 pages, 2 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Lattice (hep-lat); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th); Atomic Physics (physics.atom-ph)
    arXiv:
    2002.05167 [pdf]
    PRC(2020)·42 citations
  2. 07

    [Submitted on 12 Feb 2020] (cross-list from hep-ph)

    Probing Early-Time Dynamics and Quark-Gluon Plasma Transport Properties with Photons and Hadrons

    Charles Gale🇨🇦 · Jean-François Paquet🇺🇸 · Björn Schenke🇺🇸 · Chun Shen🇺🇸

    We use a hybrid model which relies on QCD effective kinetic theory -- K\oMP\oST -- to dynamically bridge the gap between IP-Glasma initial states and viscous hydrodynamics, for the theoretical interpretation of heavy-ion collision results. The hydrodynamic phase is then followed by dynamical freeze-out handled by UrQMD. It is observed that the new pre-equilibrium/pre-hydro phase does influence the extraction of transport coefficients. We also show how the early dynamics is reflected in photon observables.

    Comments:
    4 pages, 2 figures, contribution to the proceedings of XXVIIIth International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2019)
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2002.05191 [pdf]
    NPA(2021)·32 citations
  3. 08

    [Submitted on 13 Feb 2020] (cross-list from hep-ph)

    A possible shortcut for neutron-antineutron oscillation through mirror world

    Zurab Berezhiani🇮🇹

    Existing bounds on the neutron-antineutron mass mixing, eV, impose a severe upper limit on transition probability, or so, where is the neutron flight time. Here we propose a new mechanism of transition which is not induced by direct mass mixing but is mediated instead by the neutron mixings with the hypothetical states of mirror neutron and mirror antineutron . The latter can be as large as eV or so, without contradicting present experimental limits and nuclear stability bounds. The probabilities of and transitions, and , depend on environmental conditions in mirror sector, and they can be resonantly amplified by applying the magnetic field of the proper value. This opens up a possibility of transition with the probability which can reach the values or even larger. For finding this effect in real experiments, the magnetic field should not be suppressed but properly varied. These mixings can be induced by new physics at the scale of few TeV which may also originate a new low scale co-baryogenesis mechanism between ordinary and mirror sectors.

    Comments:
    10 pages
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2002.05609 [pdf]
    EPJC(2021)·37 citations

Affiliations

first authorsco-authorsvia INSPIRE