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Nuclear Theory·nucl-th

Wednesday·February 26, 2020

6 papers—3 primary·3 cross-listed

All6Primary3Cross-lists3
  1. 04

    [Submitted on 14 Feb 2020] (cross-list from hep-lat)

    Projective Cooling for the transverse Ising model

    Erik Gustafson🇺🇸

    We demonstrate the feasibility of ground state preparation for the transverse Ising model using projective cooling, and show that the algorithm can effectively construct the ground state in the disordered (paramagnetic) phase. On the other hand, significant temperature effects are encountered in the ordered (ferromagnetic) phase requiring larger lattices to accurately simulate.

    Comments:
    5 pages, 6 figures
    Subjects:
    High Energy Physics — Lattice (hep-lat); Statistical Mechanics (cond-mat.stat-mech); Nuclear Theory (nucl-th); Quantum Physics (quant-ph)
    arXiv:
    2002.06222 [pdf]
    PRD(2020)·17 citations
  2. 05

    [Submitted on 24 Feb 2020] (cross-list from hep-ph)

    Quark-diquark string tension, excited baryonic resonances and thermal fluctuations

    E. Megias🇪🇸 · E. Ruiz Arriola🇪🇸 · L.L. Salcedo🇪🇸

    We study the baryonic fluctuations from second to eighth order involving electric charge, baryon number and strangeness below the quark-gluon plasma crossover and numerically known from lattice QCD calculations. By considering a particular realization of the Hadron Resonance Gas model, we provide evidence on the dominant role of quark-diquark degrees of freedom to describe excited baryonic resonances. After proving by means of suitable Polyakov loop correlators that the quark-diquark and the quark-antiquark forces coincide, , we find that the corresponding susceptibilities can be saturated with excited baryonic states in a quark-diquark model picture.

    Comments:
    17 pages, 7 figures, 1 table; v2 typos corrected, added references, introduction and Sec. 4.3 extended. arXiv admin note: text overlap with arXiv:1812.09365
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
    arXiv:
    2002.10871 [pdf]
    Phys.Scripta(2020)·2 citations
  3. 06

    [Submitted on 25 Feb 2020] (cross-list from hep-ph)

    Pentaquark states from bound state approach with chiral partner structure

    Ben-Teng Zhang🇨🇳 · Jun-Shuai Wang🇨🇳 · Yong-Liang Ma🇨🇳

    The observation of the two states and [Phys.Rev.Lett. 115 (2015) 072001] solids the existence of the pentaquark state in Nature. In this work, we study the spectrum of the pentaquark states including one or two heavy quarks based on the bound state approach by binding the heavy-light mesons to the nucleon as a soliton in an effective Lagrangian approach. By regarding the doublet and doublet as chiral partners to each other and coupling them to light mesons with a minimal derivative, the chiral partner structure of the pentaquark states is calculated. We find that the bound state approach prefers to arrange and into a heavy quark doublet so both decay to through the -wave. The predicted spectrum shown in this work serves as a guide for the experimental hunting of more pentaquark states.

    Comments:
    Comments are welcome
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2002.10954 [pdf]
    5 citations

Affiliations

first authorsco-authorsvia INSPIRE