Reduction of neutrino-nucleon scattering rate by nucleon-nucleon collisions

被引：4

作者：

Yamada, S ^{[1
]}

机构：

[1] Univ Tokyo, Sch Sci, RESCEU, Bunkyo Ku, Tokyo 1130033, Japan

来源：

NUCLEAR PHYSICS A | 2000年 / 662卷 / 1-2期

基金：

日本学术振兴会;

关键词：

D O I：

10.1016/S0375-9474(99)00429-7

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We studied possible modifications of the neutrino-nucleon scattering rate due to the nucleon-nucleon collisions in the hot dense matter which we find in the supernova core. We show that the finite width of the nucleon spectral function induced by the nucleon collisions leads to a broadening of the dynamical spin structure function of the nucleon, resulting in a reduction of the rate of neutrino-nucleon scattering via the axial vector current and making the energy exchange between neutrinos and nucleons easier. The reduction rate is relatively large, similar to 0.6, even at density similar to 10(13)g/cm(3) and could have a significant impact on the dynamics of the collapse-driven supernova as well as the cooling of the proto neutron star. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：219 / 232

页数：14

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