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Nuclear Theory·nucl-th

Monday·February 2, 2015

10 papers—2 primary·8 cross-listed

All10Primary2Cross-lists8
  1. 01

    Shape effects on double beta decay of Zn and Nd in deformed shell model

    R. Sahu🇮🇳 · V.K.B. Kota🇮🇳

    Using deformed shell model based on Hartree-Fock intrinsic states with Zn as an example and employing two realistic effective interactions, namely jj44b that produces deformed shape and JUN45 that generates spherical shape, it is demonstrated that the and nuclear transition matrix elements for double beta decay will reduce considerably as we go from spherical shapes to deformed shapes. This result is further substantiated by using Nd as another example.

    nucl-th1 citation
  2. 02

    Constraining and applying a generic high-density equation of state

    Mark G. Alford🇺🇸 · G. F. Burgio🇮🇹 · Sophia Han🇺🇸 · Gabriele Taranto🇮🇹 · Dario Zappalà🇮🇹

    We discuss the "constant speed of sound" (CSS) parametrization of the equation of state of high-density matter and its application to the field correlator method (FCM) model of quark matter. We show how observational constraints on the maximum mass and typical radius of neutron stars are expressed as constraints on the CSS parameters. We find that the observation of a star already severely constrains the CSS parameters, and is particularly difficult to accommodate if the squared speed of sound in the high-density phase is assumed to be around or less. We show that the FCM equation of state can be accurately represented by the CSS parametrization, which assumes a sharp transition to a high-density phase with density-independent speed of sound. We display the mapping between the FCM and CSS parameters, and see that FCM only allows equations of state in a restricted subspace of the CSS parameters.

    nucl-thastro-ph.HEhep-phPRD(2015)·117 citations

Affiliations

first authorsco-authorsvia INSPIRE