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Nuclear Theory·nucl-th

Wednesday·November 14, 2018

7 papers—4 primary·3 cross-listed

All7Primary4Cross-lists3
  1. 05

    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.

    ↳ hep-phnucl-th1 citation
  2. 06

    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.

    ↳ hep-phhep-exnucl-thPoS(2018)·0 citations
  3. 07

    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.

    ↳ hep-phnucl-thNPA(2023)·3 citations

Affiliations

first authorsco-authorsvia INSPIRE