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http://hdl.handle.net/2445/47824
Title: | Electric dipole polarizability in 208Pb: insights from the droplet model |
Author: | Roca Maza, Xavier Brenna, M. Colò, G. Centelles Aixalà, Mario Viñas Gausí, Xavier Agrawal, B. K. Paar, N. Vretenar, D. Piekarewicz, J. |
Keywords: | Física nuclear Astrofísica Constitució de la matèria Partícules (Física nuclear) Nuclear physics Astrophysics Constitution of matter Particles (Nuclear physics) |
Issue Date: | 2013 |
Publisher: | American Physical Society |
Abstract: | We study the electric dipole polarizability α D in 208 Pb based on the predictions of a large and representative set of relativistic and nonrelativistic nuclear mean-field models. We adopt the droplet model as a guide to better understand the correlations between α D and other isovector observables. Insights from the droplet model suggest that the product of α D and the nuclear symmetry energy at saturation density J is much better correlated with the neutron skin thickness r np of 208 Pb than the polarizability alone. Correlations of α D J with r np and with the symmetry energy slope parameter L suggest that α D J is a strong isovector indicator. Hence, we explore the possibility of constraining the isovector sector of the nuclear energy density functional by comparing our theoretical predictions against measurements of both α D and the parity-violating asymmetry in 208 Pb. We find that the recent experimental determination of α D in 208 Pb in combination with the range for the symmetry energy at saturation density J = [31 ± (2) est] MeV suggests r np (208 Pb) = 0 . 165 ± (0 . 009) expt ± (0 . 013) theor ± (0.021) est fm and L = 43 ± (6) expt ± (8) theor ± (12) est MeV |
Note: | Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevC.88.024316 |
It is part of: | Physical Review C, 2013, vol. 88, num. 2, p. 024316-1-024316-7 |
URI: | http://hdl.handle.net/2445/47824 |
Related resource: | http://dx.doi.org/10.1103/PhysRevC.88.024316 |
ISSN: | 0556-2813 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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