Galactic positrons from Z0 decay

被引：1

作者：

Eichler, D ^{[1
]}

Maor, I

机构：

[1] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel

[2] Univ Cambridge, DAMTP, CMS, Cambridge CB3 0WA, England

来源：

ASTROPARTICLE PHYSICS | 2004年 / 21卷 / 02期

基金：

以色列科学基金会;

关键词：

D O I：

10.1016/j.astropartphys.2003.12.007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The positron excess below 10 GeV in the Galactic cosmic rays is shown to closely resemble the expected spectrum from sub-relativistic Z(0) decay. The possibility is critically examined that the Galactic dark matter is composed of neutralinos that are just above the half the Z(0) mass, and that the excess positrons derive from "decay" of virtual Z(0) bosons produced when the neutralinos annihilate. While this mechanism provides a very good fit for energies below 10 GeV, at higher energy it seems to disagree with the data given conventional assumptions about propagation. (C) 2004 Published by Elsevier B.V.

引用

页码：195 / 199

页数：5

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