B-L Violating Proton Decay Modes and New Baryogenesis Scenario in SO(10)

被引：33
作者：
Babu, K. S. [1 ]
Mohapatra, R. N. [2 ]
机构：
[1] Oklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA
[2] Univ Maryland, Dept Phys, Maryland Ctr Fundamental Phys, College Pk, MD 20742 USA
来源：
PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 09期
基金：
美国国家科学基金会;
关键词：
OPERATOR ANALYSIS; NON-CONSERVATION; NUCLEON DECAY; BARYON; UNIFICATION;
D O I：
10.1103/PhysRevLett.109.091803
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We show that grand unified theories based on SO(10) generate quite naturally baryon number violating dimension seven operators that violate B-L, and lead to novel nucleon decay modes such as n --> e(-) K+, e(-) pi(+) and p --> nu pi(+). We find that in two-step breaking schemes of nonsupersymmetric SO(10), the partial lifetimes for these modes can be within reach of experiments. The interactions responsible for these decay modes also provide a new way to understand the origin of matter in the Universe via the decays of grand unified theory ( GUT) scale scalar bosons of SO(10). Their ( B-L)-violating nature guarantees that the GUT scale induced baryon asymmetry is not washed out by the electroweak sphaleron interactions. In minimal SO(10) models this asymmetry is closely tied to the masses of quarks, leptons and the neutrinos.
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