期刊
PHYSICAL REVIEW D
卷 84, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.84.093007
关键词
-
资金
- DOE [DE-FG02-97ER41022]
We formulate an effective theory for systems containing a heavy Majorana fermion, such as bound states of a long-lived gluino. This Majorana HQET has the same degrees of freedom as the well-studied Dirac HQET. It respects an emergent U(1) symmetry despite the fundamental absence of a U(1) for Majorana fermions. Reparametrization invariance works identically in the two HQETs. Remarkably, while a Dirac HQET may or may not be charge conjugation symmetric, a charge conjugation symmetry emerges in all Majorana HQETs, potentially offering low energy probes to distinguish the two theories.
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