Multi-Pomeron repulsion and the neutron-star mass

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Multi-Pomeron repulsion and the neutron-star mass

Y. Yamamoto, T. Furumoto, N. Yasutake, and Th. A. Rijken

Phys. Rev. C 88, 022801(R) – Published 16 August 2013

Abstract

A multi-Pomeron exchange potential (MPP) is proposed as a model for the three-body repulsion indicated in neutron-star matter, which works universally among three and four baryons. Its strength is determined by analyzing the nucleus-nucleus scattering with the $G$ -matrix folding model. The equation of state in neutron matter is obtained including the MPP contribution. The neutron-star mass is calculated by solving the Tolmann-Oppenheimer-Volkof equation. The maximum mass is obtained to be larger than the observed one, $1.97 M_{solar}$ , on the basis of the experimental data.

Received 11 December 2012

DOI:https://doi.org/10.1103/PhysRevC.88.022801

Authors & Affiliations

Y. Yamamoto¹, T. Furumoto², N. Yasutake³, and Th. A. Rijken^1,4

¹Nishina Center for Accelerator-Based Science, Institute for Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan
²Ichinoseki National College of Technology, Ichinoseki, Iwate 021-8511, Japan
³Department of Physics, Chiba Institute of Technology, 2-1-1 Shibazono Narashino, Chiba 275-0023, Japan
⁴IMAPP, University of Nijmegen, Nijmegen, The Netherlands

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Issue

Vol. 88, Iss. 2 — August 2013

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Physical Review C

covering nuclear physics