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Nuclear Theory·nucl-th

Wednesday·November 14, 2018

7 papers—4 primary·3 cross-listed

All7Primary4Cross-lists3
  1. 01

    [Submitted on 12 Nov 2018]

    Testing a best-fit hydrodynamical model using PCA

    Tiago Nunes da Silva🇧🇷 · David Dobrigkeit Chinellato🇧🇷 · Rafael Derradi de Souza🇧🇷 · Mauricio Hippert🇧🇷 · Matthew Luzum🇧🇷 · Jorge Noronha🇧🇷 · Jun Takahashi🇧🇷

    Recently, a comprehensive Bayesian analysis was performed to simultaneously extract the values of a number of hydrodynamic parameters necessary for compatibility with a limited set of experimental data from the LHC. In this work, this best-fit model is tested against newly measured experimental flow results not included in the original work, namely the principal components of the two-particle correlation matrix in transverse momentum. The results from simulations show a good numerical agreement with data obtained by the CMS Collaboration.

    Comments:
    4 pages, 2 figures, Presented at Hot Quarks 2018 - Workshop for young scientists on the physics of ultrarelativistic nucleus-nucleus collisions, Texel, The Netherlands, September 7-14 2018, Submitted to MDPI Proceedings
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    1811.05048 [pdf]
    MDPI Proc.(2019)·6 citations
  2. 02

    [Submitted on 13 Nov 2018]

    Transits of the QCD Critical Point

    Yukinao Akamatsu🇯🇵 · Derek Teaney🇺🇸 · Fanglida Yan🇺🇸 · Yi Yin🇺🇸

    We analyze the evolution of hydrodynamic fluctuations in a heavy ion collision as the system passes close to the QCD critical point. We introduce two small dimensionless parameters and to characterize the evolution. compares the microscopic relaxation time (away from the critical point) to the expansion rate , and compares the baryon to entropy ratio, , to its critical value, . We determine how the evolution of critical hydrodynamic fluctuations depends parametrically on and . Finally, we use this parametric reasoning to estimate the critical fluctuations and correlation length for a heavy ion collision, and to give guidance to the experimental search for the QCD critical point.

    Comments:
    42 pages, 5 figures
    Subjects:
    Nuclear Theory (nucl-th); Statistical Mechanics (cond-mat.stat-mech)
    arXiv:
    1811.05081 [pdf]
    PRC(2019)·68 citations
  3. 03

    [Submitted on 11 Nov 2018]

    Partial dynamical symmetry and the phonon structure of cadmium isotopes

    A. Leviatan🇮🇱 · N. Gavrielov🇮🇱

    The phonon structure and spectral properties of states in Cd are addressed by including proton excitations in the phonon basis and exploiting a partial dynamical symmetry that mixes only certain classes of states and maintains the vibrational character in the majority of normal states.

    Comments:
    6 pages, 2 figures, 2 Tables, Proceedings of the Zakopane Conference on Nuclear Physics "Extremes of the Nuclear Landscape", Zakopane, Poland, August 26 - September 2, 2018. arXiv admin note: text overlap with arXiv:1810.05917
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1811.05322 [pdf]
    Acta Phys.Polon.B(2019)·0 citations
  4. 04

    [Submitted on 13 Nov 2018]

    Thermodynamic Behaviour of Magnetized QGP within the Self-Consistent Quasiparticle Model

    Sebastian Koothottil🇮🇳 · Vishnu M. Bannur🇮🇳

    The self-consistent quasiparticle model has been successful in studying QCD thermodynamics. In this model, the medium effects are taken into account by considering quarks and gluons as quasiparticles with temperature-dependent masses which are proportional to the plasma frequency. The present work involves the extension of this model in the presence of magnetic fields. We have included the effect of the magnetic field by considering relativistic Landau Levels. The quasiparticle masses are then found to be dependent on both temperature and magnetic field. The thermomagnetic mass thus defined allows obtaining the thermodynamics of magnetized quark matter within the self-consistent quasiparticle model. The model then has been applied to the case of 2-flavor Quark-Gluon Plasma and the equation of state obtained in the presence of magnetic fields.

    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1811.05377 [pdf]
    PRC(2019)·29 citations
  5. 05

    [Submitted on 13 Nov 2018] (cross-list from hep-ph)

    In-medium masses and magnetic moments of decuplet baryons

    Harpreet Singh🇮🇳 · Arvind Kumar🇮🇳 · Harleen Dahiya🇮🇳

    The magnetic moments of baryon decuplet are studied in vacuum as well as in the symmetric nuclear matter at finite temperature using a chiral SU(3) quark mean field model approach. The contributions coming from the valence quarks, quark sea and the orbital angular momentum of the quark sea have been considered to calculate magnetic moment of decuplet baryons. The decuplet baryon masses decrease, whereas, the magnetic moments increase significantly with the rise of baryonic density of the symmetric nuclear medium. This is because of the reason that constituent quark magnetic moment and the quark spin polarizations show considerable variation in the nuclear medium especially in the low temperature and baryonic density regime. The increase is however quantitatively less as compared to the case of octet baryon members.

    Comments:
    18 pages and 3 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1811.05125 [pdf]
    1 citation
  6. 06

    [Submitted on 13 Nov 2018] (cross-list from hep-ph)

    excited states with heavy-quark spin symmetry

    Laura Tolos🇩🇪 · Rafael Pavao🇪🇸 · Juan Nieves🇪🇸

    We study the , , sector, where five excited states have been recently observed by the LHCb Collaboration. We start from a recently developed unitarized baryon-meson model that takes, as bare baryon-meson interaction, an extended Weinberg-Tomozawa kernel consistent with both chiral and heavy-quark spin symmetries. This scheme leads to a successful description of the observed lowest-lying odd parity charmed (2595) and (2625) states, and bottomed (5912) and (5920) resonances. Within this model, five odd-parity states are dynamically generated, but with masses below 3 GeV, not allowing for an identification with the observed LHCb resonances. We revise this model and explore two different scenarios for the renormalization scheme, that is, using a modified common energy scale to perform the subtractions or utilizing a common ultraviolet cutoff to render finite the ultraviolet divergent loop functions in all channels. In both cases, we show that some (at least three) of the dynamically generated states can be identified with the experimental , while having odd parity and or . Two of these states turn out to be part of the same multiplets as the charmed and bottomed baryons.

    Comments:
    8 pages, 3 tables, 1 figure, contribution based on an invited parallel talk to XIII Quark Confinement and the Hadron Spectrum - Confinement2018, 31 July - 6 August 2018, Maynooth University, Ireland
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
    arXiv:
    1811.05149 [pdf]
    PoS(2018)·0 citations
  7. 07

    [Submitted on 13 Nov 2018] (cross-list from hep-ph)

    New targets for relic antineutrino capture

    Jeong-Yeon Lee🇰🇷 · Yeongduk Kim🇰🇷 · Satoshi Chiba🇰🇷

    Ho has been considered as a suitable candidate for the capture of relic antineutrinos. However, the detection of the relic antineutrino using Ho is extremely challenging with current techniques. Therefore, we have searched for new targets for relic antineutrino detections through the resonant capture on nuclides undergoing electron capture. We have investigated nuclear and atomic properties of all nuclides. And we finally propose Ba, Dy, Hf, Au, and Cm as new candidates for the relic antineutrino detection, and call for high precise experiments of -values and intensities of EC decays for these new candidates.

    Comments:
    9 pages, 5 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1811.05183 [pdf]
    NPA(2023)·3 citations

Affiliations

first authorsco-authorsvia INSPIRE