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Nuclear Theory·nucl-th

Tuesday·August 25, 2020

8 papers—4 primary·4 cross-listed

All8Primary4Cross-lists4
  1. 05

    [Submitted on 21 Aug 2020] (cross-list from hep-ph)

    Distribution Amplitudes of Heavy Mesons and Quarkonia on the Light Front

    Fernando E. Serna🇧🇷 · Roberto Correa da Silveira🇧🇷 · J. J. Cobos-Martínez🇲🇽 · Bruno El-Bennich🇧🇷 · Eduardo Rojas🇨🇴

    The ladder kernel of the Bethe-Salpeter equation is amended by introducing a different flavor dependence of the dressing functions in the heavy-quark sector. Compared with earlier work this allows for the simultaneous calculation of the mass spectrum and leptonic decay constants of light pseudoscalar mesons, the , , , and mesons and the heavy quarkonia and within the same framework at a physical pion mass. The corresponding Bethe-Salpeter amplitudes are projected onto the light front and we reconstruct the distribution amplitudes of the mesons in the full theory. A comparison with the first inverse moment of the heavy meson distribution amplitude in heavy quark effective theory is made.

    Comments:
    17 pages, 9 figures, 12 tables
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
    arXiv:
    2008.09619 [pdf]
    EPJC(2020)·45 citations
  2. 06

    [Submitted on 22 Aug 2020] (cross-list from astro-ph.HE)

    Gravitational wave asteroseismology for low-mass neutron stars

    Hajime Sotani

    The fundamental (-) mode gravitational waves from cold low-mass neutron stars are systematically studied with various equations of state (EOSs) characterized by the nuclear saturation parameters, especially focusing on the phenomena of the avoided crossing with the first pressure (-) mode. We find that the -mode frequency and the average density for the neutron star at the avoided crossing can be expressed as a function of the parameter, , which is the specific combination of the nuclear saturation parameters. Owing to these relations, we can derive the empirical formula expressing the -mode frequency for a low-mass neutron star, whose central density is larger than that for the neutron star at the avoided crossing, as a function of and the square root of the stellar average density, . On the other hand, we also derive the empirical formula expressing the -mode frequency for a neutron star, whose central density is less than that for the neutron star at the avoided crossing, as a function of independently of the adopted EOS. Furthermore, adopting the empirical formula of as a function of and , which is the ratio of the stellar central density to the saturation density, we can also rewrite our empirical formula for the -mode frequency to a function of and . So, by observing the -mode gravitational wave from a low-mass neutron star, whose mass or gravitational redshift is known, one could evaluate the values of and , which enables us to severely constrain the EOS for neutron star matter.

    Subjects:
    High Energy Astrophysical Phenomena (astro-ph.HE); Nuclear Theory (nucl-th)
    arXiv:
    2008.09839 [pdf]
    PRD(2020)·24 citations
  3. 07

    [Submitted on 22 Aug 2020] (cross-list from physics.plasm-ph)

    Nanoplasmonic Laser Fusion. Response to Földes and Pokol -- Letter to the Editor

    László P. Csernai · Norbert Kroó · István Papp · Daniel D. Strottman

    Földes and Pokol in their letter "Inertial fusion without compression does not work either with or without nanoplasmonics" criticized our works \cite{CS2015,CKP2018}. Here we refute their argumentation. Our proposed improvement is the combination of two basic research discoveries: (i) The possibility of detonations on space-time hyper-surfaces with time-like normal (i.e. simultaneous detonation in a whole volume) and (ii) to increase the ignition volume to the whole target, by regulating the laser light absorption using nanoantennas. These principles can be realized in an in-line, one dimensional configuration, in the simplest way with two opposing laser beams as in particle colliders \cite{CsEA2020,Bonasera2019}.

    Subjects:
    Plasma Physics (physics.plasm-ph); Nuclear Theory (nucl-th)
    arXiv:
    2008.09847 [pdf]
    Laser Part.Beams(2020)·0 citations
  4. 08

    [Submitted on 10 Jul 2020] (cross-list from hep-ex)

    A Study of Multifractal Analysis in 16O-AgBr Collisions at 60A and 200A GeV

    Nazeer Ahmad🇮🇳 · Tufail Ahmad🇮🇳 · Omveer Singh🇮🇳 · Shakeel Ahmad🇮🇳

    A multifractal analysis to study the multiparticle dynamics in 60A and 200A GeV/c 16O-AgBr collisions has been performed in the pseudorapidity phase space. Multifractal moments Gq as the function of pseudorapidity bin size for different order of the moments, q have been calculated. The power-law behaviour has been observed in the considered data sets. The variation of multifractal dimensions, Dq and multifractal spectral function, f(q) with order of the moments, q have been studied thoroughly. Dq is found to decrease with increasing order of the moments, q indicating thereby a self-similar behaviour in the multiparticle production in the considered collisions. We have also found a concave downward curve of multifractal spectral function with maxima q=0.

    Comments:
    Published
    Subjects:
    High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2008.10453 [pdf]
    J.Mod.Phys.(2018)·0 citations

Affiliations

first authorsco-authorsvia INSPIRE