Effective field theory for a heavy Majorana fermion

Journal Article · Tue Nov 01 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.84.093007· OSTI ID:21608006

Koepp, Karoline; Okui, Takemichi ^[1]

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1. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)

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.

• OSTI ID: 21608006
• Journal Information: Physical Review. D, Particles Fields, Vol. 84, Issue 9; Other Information: DOI: 10.1103/PhysRevD.84.093007; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOUND STATE
DEGREES OF FREEDOM
FERMIONS
FIELD THEORIES
MAJORANA THEORY
QUANTUM FIELD THEORY
SYMMETRY
U-1 GROUPS
LIE GROUPS
SYMMETRY GROUPS
U GROUPS