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Nuclear Theory·nucl-th

Wednesday·June 26, 2024

7 papers—4 primary·3 cross-listed

All7Primary4Cross-lists3
  1. 05

    [Submitted on 24 Jun 2024] (cross-list from hep-ph)

    Study of Heavy Quarkonia in the presence of magnetic field by Nikiforov Uvarov method

    Rishabh Sharma🇮🇳 · Siddhartha Solanki🇮🇳 · Manohar Lal🇮🇳 · Vineet Kumar Agotiya🇮🇳

    The N-dimensional radial Schrodinger equation has been solved using the Nikiforov Uvarov (NU) method, in which we used the medium modified form of Cornell potential and quasi-particle Debye mass with strong magnetic field background. The binding energies and the mass spectra of heavy quarkonium have been studied in the N-dimensional space for different values of magnetic field, the binding energy decreases with increasing magnetic field, which shows early dissociation of heavy quarkonium system. The influence of dimensionality number has also been discussed on binding energies of J/{\psi} and {\Upsilon} for fixed value of magnetic field. It is found that with an increase in dimensionality, the binding energy starts decreasing from a higher initial value. The results obtained are quite consistent with recent studies.

    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2406.16996 [pdf]
    Int.J.Mod.Phys.A(2024)·3 citations
  2. 06

    [Submitted on 25 Jun 2024] (cross-list from hep-ph)

    The as a hadronic molecule

    Ju-Jun Xie🇨🇳 · Li-Sheng Geng🇨🇳

    Recently, a new excited baryon state, , was observed in the invariant mass spectra of and by the Belle Collaboration. This state has a narrow width ( MeV) compared to other baryon states with a similar mass. In this paper, we provide a mini-review on the state from the molecular perspective, where it appears to be a dynamically generated state with spin-parity from the coupled-channels interactions of the and in -wave and in -wave. Additionally, alternative explanations for the resonance are also discussed.

    Comments:
    Mini-review on the state from the molecular perspective. Accepted by the Chinese Physics Letters
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2406.17481 [pdf]
    Chin.Phys.Lett.(2024)·11 citations
  3. 07

    [Submitted on 25 Jun 2024] (cross-list from hep-ph)

    MC-EKRT: Monte Carlo event generator with saturated minijet production for initializing 3+1 D fluid dynamics in high energy nuclear collisions

    Mikko Kuha · Jussi Auvinen · Kari J. Eskola · Henry Hirvonen · Yuuka Kanakubo · Harri Niemi

    We present a novel Monte-Carlo implementation of the EKRT model, MC-EKRT, for computing partonic initial states in high-energy nuclear collisions. Our new MC-EKRT event generator is based on collinearly factorized, dynamically fluctuating pQCD minijet production, supplemented with a saturation conjecture that controls the low- particle production. Previously, the EKRT model has been very successful in describing low- observables at mid-rapidity in heavy-ion collisions at the LHC and RHIC energies. As novel features, our new MC implementation gives a full 3-dimensional initial state event-by-event, includes dynamical minijet-multiplicity fluctuations in the saturation and particle production, introduces a new type of spatially dependent nuclear parton distribution functions, and accounts for the conservation of energy/momentum and valence-quark number. In this proof-of-principle study, we average a large set of event-by-event MC-EKRT initial conditions and compute the rapidity and centrality dependence of the charged hadron multiplicities and elliptic flow for the LHC Pb+Pb and RHIC Au+Au collisions using 3+1 D viscous fluid-dynamical evolution. Also event-by-event fluctuations and decorrelations of initial eccentricities are studied. The good agreement with the rapidity-dependent data suggests that the same saturation mechanism that has been very successful in explaining the mid-rapidity observables, works well also at larger rapidities.

    Comments:
    31 pages, 18 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2406.17592 [pdf]
    PRC(2025)·14 citations

Affiliations

first authorsco-authorsvia INSPIRE