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Title: Effective field theory for a heavy Majorana fermion

Abstract

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.

Authors:
;  [1]
  1. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
Publication Date:
OSTI Identifier:
21608006
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 84; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevD.84.093007; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Koepp, Karoline, and Okui, Takemichi. Effective field theory for a heavy Majorana fermion. United States: N. p., 2011. Web. doi:10.1103/PHYSREVD.84.093007.
Koepp, Karoline, & Okui, Takemichi. Effective field theory for a heavy Majorana fermion. United States. doi:10.1103/PHYSREVD.84.093007.
Koepp, Karoline, and Okui, Takemichi. Tue . "Effective field theory for a heavy Majorana fermion". United States. doi:10.1103/PHYSREVD.84.093007.
@article{osti_21608006,
title = {Effective field theory for a heavy Majorana fermion},
author = {Koepp, Karoline and Okui, Takemichi},
abstractNote = {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.},
doi = {10.1103/PHYSREVD.84.093007},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 9,
volume = 84,
place = {United States},
year = {2011},
month = {11}
}