Effects of mixing between ordinary and exotic charged leptons in the process e sup + e sup minus r arrow Z sup 0 Z sup 0

Journal Article · Thu Mar 01 04:00:00 EST 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.41.1438· OSTI ID:6916141

Singh, S; Nagawat, A K; Sharma, N K ^[1]

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1. Department of Physics, University of Rajasthan, Jaipur 302004, India (IN)

The process {ital e}{sup +}{ital e}{sup {minus}}{r arrow}{ital Z}{sup 0}{ital Z}{sup 0} is reexamined with the inclusion of mixing between ordinary and exotic charged leptons. Three types of exotic leptons, (i) mirror, (ii) vector doublet, and (iii) vector singlet, are considered. The effects of mixing are discussed in terms of the expected relative deviations in the differential decay parameters with respect to the standard-model results. These are presented as a function of the scattering angle as well as a function of the square of mixing, {vert bar}{ital U}{sub {ital Ee}}{vert bar}{sup 2}, between the ordinary ({ital e}) and exotic ({ital E}) leptons. At {radical}{ital s} =200 GeV, {ital m}{sub {ital E}}=100 GeV, and {vert bar}{ital U}{sub {ital Ee}}{vert bar}{sup 2}=0.02, for the mixing of the three types of leptons, the expected relative deviations are (i) between {minus}2.7% and {minus}7.6% in the differential cross sections with unpolarized {ital e}{sup +},{ital e}{sup {minus}} beams, (ii) between {similar to}{minus}6% and {similar to}{minus}8% in the inclusive angular distributions (for the production of polarized {ital Z}{sup 0}'s) with longitudinally polarized {ital e}{sup {minus}} and unpolarized {ital e}{sup +} beams, and (iii) between +10.4% and {minus}11% in the differential polarization asymmetry. The magnitudes of the relative deviations, in most of these decay parameters, increase with the increase in {ital m}{sub {ital E}}. We find that, in principle, measurements of relative deviations in the polarization asymmetry and inclusive angular distributions with {ital e}{sub {ital L}({ital R})}{sup {minus}},{ital e}{sup +} beams could help in distinguishing mirror, vector-doublet, and vector-singlet lepton mixings.

• OSTI ID: 6916141
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 41:5; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
BOSONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
INCLUSIVE INTERACTIONS
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEPTON-LEPTON INTERACTIONS
LIE GROUPS
MATHEMATICAL MODELS
MIXING RATIO
PAIR PRODUCTION
PARTICLE INTERACTIONS
PARTICLE MODELS
POLARIZED PRODUCTS
STANDARD MODEL
SU GROUPS
SU-2 GROUPS
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS
Z NEUTRAL BOSONS