R-parity breaking via type II seesaw, decaying gravitino dark matter and PAMELA positron excess

被引：47

作者：

Chen, Shao-Long ^{[1
,2
]}

Mohapatra, Rabindra N. ^{[1
,2
]}

Nussinov, Shmuel ^{[3
,6
]}

Zhang, Yue ^{[1
,2
,4
,5
]}

机构：

[1] Univ Maryland, Maryland Ctr Fundamental Phys, College Pk, MD 20742 USA

[2] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[3] Tel Aviv Univ, Tel Aviv, Israel

[4] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China

[5] Peking Univ, Inst Theoret Phys, Beijing 100871, Peoples R China

[6] Chapman Coll, Orange, CA USA

来源：

PHYSICS LETTERS B | 2009年 / 677卷 / 05期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

NEUTRINO MASSES; FRACTION; MIXINGS; MODELS;

D O I：

10.1016/j.physletb.2009.05.051

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We propose a new class of R-parity violating extension of MSSM with type 11 seesaw mechanism for neutrino masses where an unstable gravitino is the dark matter of the Universe. It decays predominantly into three leptons final states, thereby providing a natural explanation of the positron excess but no antiproton excess in the PAMELA experiment. The model can explain neutrino masses without invoking any high scale physics while keeping the pre-existing baryon asymmetry of the universe in tact. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：311 / 317

页数：7