Phenomenology of gluino decays via loops and top-quark Yukawa coupling

Journal Article · Sat Sep 01 04:00:00 EDT 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.42.1568· OSTI ID:6478639

Baer, H ^[1]; Tata, X ^[2]; Woodside, J ^[3]

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1. Physics Department, Florida State University, Tallahassee, FL (USA)
2. Department of Physics and Astronomy, University of Hawaii, Honolulu, HI (USA)
3. Physics Department, Oklahoma State University, Stillwater, OK (USA)

We have reanalyzed the decay patterns of the gluino ({ital {tilde g}}) incorporating all its decays to charginos ({ital {tilde W}}{sub {ital i}}) and neutralinos ({ital {tilde Z}}{sub {ital i}}) as given by the minimal model. We have made an independent computation of the decay width for {ital {tilde g}}{r arrow}{ital g{tilde Z}}{sub {ital i}} which occurs at one loop and shown that the branching fraction for this can be up to 0.5. We have also computed the width for {ital {tilde g}}{r arrow}{ital t{bar t}{tilde Z}}{sub {ital i}} including the effect of the top-quark Yukawa coupling, which significantly increases this width. We have studied the gluino decay modes as a function of parameter space, and clearly delineated the regions where the loop decays or {ital {tilde g}}{r arrow}{ital t{bar t}{tilde Z}}{sub {ital i}} is large. The significance of these decays for gluino signatures in collider experiments is briefly commented on.

• DOE Contract Number: FG05-85ER40215; AM03-76SF00235
• OSTI ID: 6478639
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 42:5; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645201* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- General & Scattering Theory
645300 -- High Energy Physics-- Particle Invariance Principles & Symmetries
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BOSONS
BRANCHING RATIO
CYCLIC ACCELERATORS
DECAY
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FERMILAB TEVATRON
FERMIONS
GLUONS
HIGGS BOSONS
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
JET MODEL
LEPTON-LEPTON INTERACTIONS
MASS
MATHEMATICAL MODELS
NUCLEAR POTENTIAL
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
POSTULATED PARTICLES
POTENTIALS
QUARKS
STANDARD MODEL
SUPERSYMMETRY
SYMMETRY
SYMMETRY BREAKING
SYNCHROTRONS
TOP PARTICLES
UNIFIED GAUGE MODELS
W MINUS BOSONS
W PLUS BOSONS
YUKAWA POTENTIAL