Rare decays of the. tau. lepton as a probe of the left-right-symmetric theories of weak interactions

Journal Article · Thu Oct 01 04:00:00 EDT 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.46.2990· OSTI ID:7258624

Mohapatra, R N ^[1]

---

1. Department of Physics, University of Maryland, College Park, Maryland 20742 (United States)

We consider the flavor-changing rare decays of the {tau} lepton as a probe on the left-right-symmetric theories of weak interactions manifesting at the TeV energy scale. We find the branching ratios for the rare decays such as {tau}{r arrow}3{mu} and {tau}{r arrow}{mu}{ital ee}, etc., as large as 10{sup {minus}5} and those for the radiative decays such as {tau}{r arrow}{mu}{gamma} and {tau}{r arrow}{ital e}{gamma} as large as 4{times}10{sup {minus}6}, consistent with the existing bounds on the model if the neutrino is a Majorana fermion with its small mass accounted for by the seesaw mechanism. On the other hand, for the case of Dirac neutrinos with a small {ital m}{sub {nu}} accounted for by the loop mechanism, these rare decay modes are suppressed to the level of 10{sup {minus}10} or less.

• OSTI ID: 7258624
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 46:7; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662120 -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662210* -- Specific Theories & Interaction Models
662370 -- Decays of Leptons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGEBRAIC CURRENTS
BASIC INTERACTIONS
BRANCHING RATIO
COMPOSITE MODELS
CURRENTS
DECAY
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
FLAVOR MODEL
HEAVY LEPTONS
INTERACTIONS
LEP STORAGE RINGS
LEPTONS
LIE GROUPS
MASS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATTER
MUONS
NEUTRAL CURRENTS
NEUTRINOS
NONLUMINOUS MATTER
PARTICLE DECAY
PARTICLE MODELS
POSTULATED PARTICLES
Pa
Particle Systematics-- Unified Theories & Models-- (1992-)
QUARK MODEL
QUARKS
RADIATIVE DECAY
STANDARD MODEL
STORAGE RINGS
SU GROUPS
SU-2 GROUPS
SU-3 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
TAU PARTICLES
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS
UNIVERSE
WEAK INTERACTIONS