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Nuclear Theory·nucl-th

Tuesday·September 27, 2016

5 papers—3 primary·2 cross-listed

All5Primary3Cross-lists2
  1. 04

    [Submitted on 25 Sept 2016] (cross-list from hep-ph)

    Model-independent determination of the compositeness of near-threshold quasibound states

    Yuki Kamiya🇯🇵 · Tetsuo Hyodo🇯🇵

    We study the compositeness of near-threshold states to clarify the internal structure of exotic hadron candidates. Within the framework of effective field theory, we extend the Weinberg's weak-binding relation to include the nearby CDD (Castillejo-Dalitz-Dyson) pole contribution with the help of the Pade approximant. Finally, using the extended relation, we conclude that the CDD pole contribution to the Lambda(1405) baryon in the Kbar N amplitude is negligible.

    Comments:
    5 pages, Proceedings of the 14th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU2016), July 25-30, 2016, Kyoto, Japan
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1609.07733 [pdf]
    JPS Conf.Proc.(2017)·0 citations
  2. 05

    [Submitted on 26 Sept 2016] (cross-list from hep-ph)

    Reparametrizing the PolyakovNambuJona-Lasinio model

    Abhijit Bhattacharyya🇮🇳 · Sanjay K. Ghosh🇮🇳 · Soumitra Maity🇮🇳 · Sibaji Raha🇮🇳 · Rajarshi Ray🇮🇳 · Kinkar Saha🇮🇳 · Sudipa Upadhaya🇮🇳

    The PolyakovNambuJona-Lasinio model has been quite successful in describing various qualitative features of observables for strongly interacting matter, that are measurable in heavy-ion collision experiments. The question still remains on the quantitative uncertainties in the model results. Such an estimation is possible only by contrasting these results with those obtained from first principles using the lattice QCD framework. Recently a variety of lattice QCD data were reported in the realistic continuum limit. Here we make a first attempt at reparametrizing the model so as to reproduce these lattice data. We find excellent quantitative agreement for the equation of state. Certain discrepancies in the charge and strangeness susceptibilities as well as baryon-charge correlation still remain. We discuss their causes and outline possible directions to remove them.

    Comments:
    15 pages, 11 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
    arXiv:
    1609.07882 [pdf]
    PRD(2017)·32 citations

Affiliations

first authorsco-authorsvia INSPIRE