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Nuclear Theory·nucl-th

Tuesday·February 25, 2020

10 papers—7 primary·3 cross-listed

All10Primary7Cross-lists3
  1. 08

    [Submitted on 23 Feb 2020] (cross-list from physics.data-an)

    Bryan's Maximum Entropy Method -- diagnosis of a flawed argument and its remedy

    Alexander Rothkopf

    The Maximum Entropy Method (MEM) is a popular data analysis technique based on Bayesian inference, which has found various applications in the research literature. While the MEM itself is well-grounded in statistics, I argue that its state-of-the-art implementation, suggested originally by Bryan, artificially restricts its solution space. This restriction leads to a systematic error often unaccounted for in contemporary MEM studies. The goal of this paper is to carefully revisit Bryan's train of thought, point out its flaw in applying linear algebra arguments to an inherently nonlinear problem, and suggest possible ways to overcome it.

    Comments:
    16 pages, 3 figures, peer reviewed and published version
    Subjects:
    Data Analysis, Statistics and Probability (physics.data-an); High Energy Physics — Lattice (hep-lat); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th); Computational Physics (physics.comp-ph)
    arXiv:
    2002.09865 [pdf]
    Data 2020, 5(3), 85·9 citations
  2. 09

    [Submitted on 23 Feb 2020] (cross-list from hep-ph)

    The Collectivity of Heavy Mesons in Proton-Nucleus Collisions

    Cheng Zhang🇨🇳 · Cyrille Marquet🇫🇷 · Guang-You Qin🇨🇳 · Yu Shi🇨🇳 · Lei Wang🇨🇳 · Shu-Yi Wei🇫🇷 · Bo-Wen Xiao🇨🇳

    Using a model based on the Color Glass Condensate framework and the dilute-dense factorization, we systematically study the azimuthal angular correlations between a heavy flavor meson and a light reference particle in proton-nucleus collisions. The obtained second harmonic coefficients (also known as the elliptic flows) for and agree with recent experimental data from the LHC. We also provide predictions for the elliptic flows of and meson, which can be measured in the near future at the LHC. This work can shed light on the physics origin of the collectivity phenomenon in the collisions of small systems.

    Comments:
    14 pages, 7 figures. This work is an extension of our earlier publication 10.1103/PhysRevLett.122.172302 (arXiv:1901.10320); v2 with minor updates
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2002.09878 [pdf]
    PRD(2020)·37 citations
  3. 10

    [Submitted on 24 Feb 2020] (cross-list from nucl-ex)

    Chiral Magnetic Effects in Nuclear Collisions

    Wei Li🇺🇸 · Gang Wang🇺🇸

    The interplay of quantum anomalies with strong magnetic field and vorticity in chiral systems could lead to novel transport phenomena, such as the chiral magnetic effect (CME), the chiral magnetic wave (CMW) and the chiral vortical effect (CVE). In high-energy nuclear collisions, these chiral effects may survive the expansion of a quark-gluon plasma fireball and be detected in experiments. The experimental searches for the CME, the CMW and the CVE, have aroused extensive interest over the past couple of decades. The main goal of this article is to review latest experimental progress in search for these novel chiral transport phenomena at Relativistic Heavy Ion Collider at BNL and the Large Hadron Collider at CERN. Future programs to help reduce uncertainties and facilitate the interpretation of the data are also discussed.

    Comments:
    Invited review for Annual Review of Nuclear and Particle Science, 28 pages, 11 figures. Comments are welcome!
    Subjects:
    Nuclear Experiment (nucl-ex); High Energy Physics — Experiment (hep-ex); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2002.10397 [pdf]
    Ann.Rev.Nucl.Part.Sci.(2020)·71 citations

Affiliations

first authorsco-authorsvia INSPIRE