Possible deviations due to exotic-lepton mixings in the process e sup + e sup minus r arrow W sup + W sup minus

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

DOI:https://doi.org/10.1103/PhysRevD.42.2984· OSTI ID:6396428

Nagawat, A K; Singh, S; 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 W}{sup +}{ital W}{sup {minus}} is reexamined with the inclusion of mixing between ordinary leptons and exotic leptons of the types (i) mirror, (ii) vector doublet, and (iii) vector singlet. The effects of mixings are discussed in terms of the expected relative deviations from the standard-model predictions for the total cross section, the forward-backward asymmetry, the differential angular distribution for unpolarized {ital W}'s, and the inclusive angular distributions for longitudinally ({ital L}) and transversely ({ital T}) polarized {ital W}'s with and without charge identification at energies of the CERN collider LEP II ({radical}{ital s} {approx}190 GeV). These deviations are evaluated for three extreme cases of mixing: (I) mixing in the neutral-lepton sector only, (II) mixing in the charged-lepton sector only, and (III) equal mixings in both sectors. The expected relative deviations are presented as a function of the scattering angle {theta} as well as the exotic-neutrino mass {ital m}{sub {ital N}} and the square of the mixing angle sin{sup 2}{psi}. For case (I), all three types of exotic leptons have identical mixing effects. For a run of 500-pb{sup {minus}1} data, with {ital m}{sub {ital N}}{ge}250 GeV and {psi}=10{degree}, the expected relative deviations are more than one standard deviation (SD) error in {ital d}{sigma}({theta}), {ital d}{sigma}{sub {ital T}}({theta}) for all values of {theta}, in {ital d}{sigma}{sub {ital T}{ital T}}({theta}) for cos{theta}{ge}0.4, and in {ital d}{sigma}{sub {ital L}}({theta}) for {vert bar}cos{theta}{vert bar}{le}0.6.

• OSTI ID: 6396428
• Journal Information: Physical Review, D (Particles Fields); (USA), Vol. 42:9; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ELECTRON-POSITRON INTERACTIONS
ANNIHILATION
W MINUS BOSONS
PARTICLE PRODUCTION
W PLUS BOSONS
ANGULAR DISTRIBUTION
ASYMMETRY
EIGENSTATES
FEYNMAN DIAGRAM
GEV RANGE 100-1000
LEPTONS
S CHANNEL
STANDARD MODEL
TOTAL CROSS SECTIONS
BASIC INTERACTIONS
BOSONS
CROSS SECTIONS
DIAGRAMS
DISTRIBUTION
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEPTON-LEPTON INTERACTIONS
MATHEMATICAL MODELS
PARTICLE INTERACTIONS
PARTICLE MODELS
UNIFIED GAUGE MODELS
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