Leptonic CP violation in Z sup 0 decays

Journal Article · Mon Jul 29 04:00:00 EDT 1991 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.67.548· OSTI ID:5443302

Choudhury, D; Joshipura, A S; Rindani, S D ^[1]

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1. Theory Group, Physical Research Laboratory, Navrangpura, Ahmedabad 380 009 (India)

An SU(2){sub {ital L}}{direct product}U(1){sub {ital Y}} model containing exotic charged leptons can allow sizeable leptonic flavor violations (LFV) and hence rare {ital Z} decays into leptons of different flavors. The rates as well as {ital CP}-violating asymmetries are constrained using available limits on LFV and data from the CERN {ital e}{sup +}{ital e{minus}} collider LEP on {ital Z}{r arrow}{ital l}{sub {ital i}l{ital i}},{ital l}{sub {ital i}}={ital e},{mu},{tau}. Sizeable {ital CP}-violating rate asymmetries are theoretically possible in the model and are allowed by the former data. In contrast, the measured leptonic {ital Z} widths severely constrain these asymmetries. As a result, an experimental observation of the {ital CP} asymmetries in the model seems unlikely with less than 10{sup 9} {ital Z}'s.

• OSTI ID: 5443302
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 67:5; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
645300 -- High Energy Physics-- Particle Invariance Principles & Symmetries
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ASYMMETRY
BASIC INTERACTIONS
BOSONS
CP INVARIANCE
DECAY
DECAY AMPLITUDES
ELEMENTARY PARTICLES
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
INVARIANCE PRINCIPLES
LEPTONIC DECAY
PARTICLE DECAY
SYMMETRY
TRANSITION AMPLITUDES
UNITARY SYMMETRY
WEAK INTERACTIONS
WEAK PARTICLE DECAY
Z NEUTRAL BOSONS