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Nuclear Theory·nucl-th

Thursday·March 31, 2022

8 papers—3 primary·5 cross-listed

All8Primary3Cross-lists5
  1. 04

    [Submitted on 29 Mar 2022] (cross-list from hep-ph)

    Prospects for precise predictions of in the Standard Model

    G. Colangelo🇨🇭 · M. Davier🇫🇷 · A. X. El-Khadra🇺🇸 · M. Hoferichter🇨🇭 · C. Lehner🇩🇪 · L. Lellouch🇫🇷 · T. Mibe🇯🇵 · B. L. Roberts🇺🇸 · T. Teubner🇬🇧 · H. Wittig🇩🇪 · B. Ananthanarayan🇮🇳 · A. Bashir🇲🇽 and 70 other authors

    We discuss the prospects for improving the precision on the hadronic corrections to the anomalous magnetic moment of the muon, and the plans of the Muon Theory Initiative to update the Standard Model prediction.

    Comments:
    Contribution to the US Community Study on the Future of Particle Physics (Snowmass 2021)
    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:
    2203.15810 [pdf]
    136 citations
  2. 05

    [Submitted on 30 Mar 2022] (cross-list from hep-ph)

    Towards (semi) exclusive cross section measurements and modelling

    Maria B. Barbaro🇫🇷

    Semi-inclusive neutrino-nucleus scattering, corresponding to the simultaneous detection of a lepton and one or more hadrons in the final state, is shown to be much more sensitive to nuclear effects than the inclusive process. The theoretical description of the semi-inclusive process is illustrated and some comparisons of relativistic plane wave impulse approximation (RPWIA) predictions with recent MicroBooNE, T2K and MINERvA data on argon and carbon are shown. The merit of new variables constructed to enhance particular nuclear effects is also illustrated and future developments going beyond the RPWIA approach are outlined.

    Comments:
    9 pages, 3 figures, Proceedings of the 22nd International Workshop on Neutrinos from Accelerators (NuFact2021), September 5-11, 2021, (Online/In person) Cagliari, Italy
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2203.16132 [pdf]
    PoS(2022)·1 citation
  3. 06

    [Submitted on 30 Mar 2022] (cross-list from astro-ph.HE)

    Chiral asteroseismology: seismic oscillations caused by chiral transport in neutron stars and supernovae

    Sota Hanai🇯🇵 · Naoki Yamamoto🇯🇵

    We study the novel asteroseismology of the chiral magnetic wave (CMW) of the quark number density in relativistic quark matter inside neutron stars and core-collapse supernovae and the chiral vortical wave (CVW) of the neutrino number density in relativistic neutrino matter at the core of supernovae. We call the oscillation modes for these chiral waves the chiral magnetic mode (CM-mode) and chiral vortical mode (CV-mode), respectively. We derive the dispersion relations of these new modes in the presence of the chirality flipping due to the finite quark mass and diffusion. We then estimate the possible frequencies of these modes and amplitudes of the resulting gravitational waves. In particular, since the CM-mode can exist only in quark matter with nearly gapless quarks (such as the two-flavor color superconductivity) for a sufficiently strong magnetic field, corresponding gravitational waves provide a new possible probe for such quark matter and the magnetic field in neutron stars.

    Comments:
    25 pages, 2 figures; v3: published version
    Subjects:
    High Energy Astrophysical Phenomena (astro-ph.HE); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2203.16133 [pdf]
    JCAP(2023)·5 citations
  4. 07

    [Submitted on 30 Mar 2022] (cross-list from hep-ph)

    Momentum transport properties of a hot and dense QCD matter in a weak magnetic field

    Shubhalaxmi Rath🇮🇳 · Sadhana Dash🇮🇳

    We have studied the momentum transport properties of a hot and dense QCD matter in the presence of weak magnetic field by determining the shear () and bulk () viscosities in the relaxation time approximation of kinetic theory. The dependence of and on the temperature has been explored in the presence of weak magnetic field (-field) and finite chemical potential (). It is observed that both shear and bulk viscosities get decreased in the presence of a weak magnetic field, whereas the finite chemical potential increases these viscosities, specifically at low temperatures. This study is important to understand the sound attenuation through the Prandtl number (Pr), the nature of the flow through the Reynolds number (Re), the fluidity and location of transition point of the matter through the ratios and ( is the entropy density), respectively. The Prandtl number is observed to increase in the weak magnetic field, whereas the presence of a finite chemical potential reduces its magnitude as compared to the scenario of absence of -field and . However, Pr still remains larger than unity, indicating that the energy dissipation due to the sound attenuation is mostly governed by the momentum diffusion. It is noticed that the weak magnetic field makes the Reynolds number larger, whereas the chemical potential makes it smaller than that in the absence of -field and . We have observed that the ratio decreases in the weak magnetic field regime, whereas the finite chemical potential increases its value, but the ratio is found to decrease in the presence of weak magnetic field as well as finite chemical potential.

    Comments:
    32 pages, 8 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    2203.16199 [pdf]
    EPJC(2022)·21 citations
  5. 08

    [Submitted on 30 Mar 2022] (cross-list from hep-ph)

    Heavy quarks and jets as probes of the QGP

    Liliana Apolinário (1 and 2)🇵🇹 · Yen-Jie Lee (3)🇺🇸 · Michael Winn (4) ((1) LIP, (2) Instituto Superior Técnico (IST), Universidade de Lisboa, (3) Massachusetts Institute of Technology (MIT), (4) Département de Physique Nucléaire (DPhN), Institut de Recherche sur les lois Fondamentales de l'Univers (IRFU) CEA - Saclay)🇫🇷

    Quark-Gluon Plasma (QGP), a QCD state of matter created in ultra-relativistic heavy-ion collisions, has remarkable properties, including, for example, a low shear viscosity over entropy ratio. By detecting the collection of low-momentum particles that arise from the collision, it is possible to gain quantitative insight into the created matter. However, its fast evolution and thermalization properties remain elusive. Only using high momentum objects as probes of QGP can unveil its constituents at different wavelengths. In this review, we attempt to provide a comprehensive picture of what was, so far, possible to infer about QGP given our current theoretical understanding of jets, heavy-flavor, and quarkonia. We will bridge the resulting qualitative picture to the experimental observations done at the LHC and RHIC. We will focus on the phenomenological description of experimental observations, provide a brief analytical summary of the description of hard probes, and an outlook on the main difficulties we will need to surpass in the following years. To benchmark QGP-related effects, we will also address nuclear modifications to the initial state and hadronization effects.

    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2203.16352 [pdf]
    PPNP(2022)·215 citations

Affiliations

first authorsco-authorsvia INSPIRE