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Nuclear Theory·nucl-th

Wednesday·July 20, 2022

4 papers—2 primary·2 cross-listed

All4Primary2Cross-lists2
  1. 03

    [Submitted on 18 Jul 2022] (cross-list from hep-ph)

    Classical vs quantum corrections to jet broadening in a weakly-coupled Quark-Gluon Plasma

    Jacopo Ghiglieri🇫🇷 · Eamonn Weitz🇫🇷

    The transverse momentum broadening coefficient receives both soft, classical and radiative, quantum corrections. The former are responsible for a large O(g) correction, whereas the latter enter at relative order , but are enhanced by a double logarithm of the length of the medium over the thermal wavelength. We analyze radiative corrections for a weakly-coupled quark-gluon plasma. We find that a thermal population of dynamical gluons changes the boundaries and reduces the size of the double-logarithmic phase space. It also provides new subdominant logarithmic corrections. We also show how the quantum, double-logarithmic and classical, soft phase spaces are smoothly connected once the radiated gluon becomes soft enough. Finally, we discuss a pathway to a determination of radiative corrections beyond the harmonic-oscillator approximation.

    Comments:
    26 pages plus appendices, 9 figures. v2: minor typographical fixes, matches JHEP version
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2207.08842 [pdf]
    JHEP(2022)·28 citations
  2. 04

    [Submitted on 19 Jul 2022] (cross-list from astro-ph.CO)

    Chiral effects in astrophysics and cosmology

    Kohei Kamada🇯🇵 · Naoki Yamamoto🇯🇵 · Di-Lun Yang🇹🇼

    The microscopic quantum nature of elementary particles, chirality, leads to macroscopic phenomena like the chiral anomaly, chiral magnetic effect, and chiral plasma instability. We review recent progress of the studies of these chiral effects in high-energy astrophysics, such as pulsar kicks, magnetars, and core-collapse supernovae, and early Universe cosmology, such as the primordial magnetic field, baryogenesis, and chiral gravitational waves. We also provide a pedagogical introduction to the chiral effects and low-energy effective theories to describe them in and out of equilibrium -- the chiral (magneto)hydrodynamics, chiral kinetic theory, and chiral radiation transport theory for neutrinos.

    Comments:
    76 pages, 4 figures; v2: minor revisions, version to appear in Progress in Particle and Nuclear Physics
    Subjects:
    Cosmology and Nongalactic Astrophysics (astro-ph.CO); High Energy Astrophysical Phenomena (astro-ph.HE); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2207.09184 [pdf]
    PPNP(2023)·69 citations

Affiliations

first authorsco-authorsvia INSPIRE