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Nuclear Theory·nucl-th

Thursday·March 17, 2022

8 papers—6 primary·2 cross-listed

All8Primary6Cross-lists2
  1. 07

    [Submitted on 15 Mar 2022] (cross-list from hep-ph)

    Snowmass white paper: Need for amplitude analysis in the discovery of new hadrons

    Miguel Albaladejo🇪🇸 · Marco Battaglieri🇮🇹 · Lukasz Bibrzycki🇵🇱 · Andrea Celentano🇮🇹 · Igor V. Danilkin🇩🇪 · Sebastian M. Dawid🇺🇸 · Michael Doring🇺🇸 · Cristiano Fanelli🇺🇸 · Cesar Fernandez-Ramirez🇪🇸 · Sergi Gonzalez-Solis🇺🇸 · Astrid N. Hiller Blin🇩🇪 · Andrew W. Jackura🇺🇸 and 13 other authors

    We highlight the need for the development of comprehensive amplitude analysis methods to further our understanding of hadron spectroscopy. Reaction amplitudes constrained by first principles of -matrix theory and by QCD phenomenology are needed to extract robust interpretations of the data from experiments and from lattice calculations.

    Comments:
    15 pages, 9 figures. Contribution to Snowmass 2021
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
    arXiv:
    2203.08208 [pdf]
    8 citations
  2. 08

    [Submitted on 15 Mar 2022] (cross-list from hep-ph)

    Role of bulk viscosity in deuteron production in ultrarelativistic nuclear collisions

    D. Everett🇺🇸 · D. Oliinychenko🇺🇸 · M. Luzum🇧🇷 · J.-F. Paquet🇺🇸 · G. Vujanovic🇺🇸 · S. A. Bass🇺🇸 · L. Du🇨🇦 · C. Gale🇨🇦 · M. Heffernan🇨🇦 · U. Heinz🇺🇸 · L. Kasper🇺🇸 · W. Ke🇺🇸 and 44 other authors

    We use a Bayesian-calibrated multistage viscous hydrodynamic model to explore deuteron yield, mean transverse momentum and flow observables in LHC Pb-Pb collisions. We explore theoretical uncertainty in the production of deuterons, including (i) the contribution of thermal deuterons, (ii) models for the subsequent formation of deuterons (hadronic transport vs coalescence) and (iii) the overall sensitivity of the results to the hydrodynamic model -- in particular to bulk viscosity, which is often neglected in studies of deuteron production. Using physical parameters set by a comparison to only light hadron observables, we find good agreement with measurements of the mean transverse momentum and elliptic flow of deuterons; however, tension is observed with experimental data for the deuteron multiplicity in central collisions. The results are found to be sensitive to each of the mentioned theoretical uncertainties, with a particular sensitivity to bulk viscosity, indicating that the latter is an important ingredient for an accurate treatment of deuteron production.

    Comments:
    11 pages, 8 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2203.08286 [pdf]
    PRC(2022)·19 citations

Affiliations

first authorsco-authorsvia INSPIRE