Higgs-boson production from decays of the fourth-generation b prime quark

Journal Article · Sat Jun 01 00:00:00 EDT 1991 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.43.3669· OSTI ID:5664356

Hou, W ^[1]; Stuart, R G ^[2]

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1. Paul Scherrer Institute, CH-5232 Villigen PSI (Switzerland)
2. Theory Division, CERN, CH-1211 Geneva 23 (Switzerland)

In a scenario in which the fourth-generation {ital b}{prime} quark is lighter than {ital m}{sub {ital t}}+{ital M}{sub {ital W}}, flavor-changing neutral-current {ital b}{prime}{r arrow}{ital b} transitions could be substantial. In particular, the decay {ital b}{prime}{r arrow}{ital bH} could be dominant or comparable to the processes {ital b}{prime}{r arrow}{ital ce}{bar {nu}} and/or {ital b}{prime}{r arrow}{ital bZ} for a wide range of the parameters {ital m}{sub {ital b}{prime}}, {ital m}{sub {ital t}}, {ital m}{sub {ital t}{prime}}, {ital M}{sub {ital H}}, {ital V}{sub {ital c}{ital b}{prime}}, and {ital V}{sub {ital t}{ital b}{prime}}. For {ital b}{prime}{ital {bar b}}{prime} pairs the latter decays could provide valuable leptonic tags for Higgs-boson production that is especially useful in hadronic colliders for a Higgs boson in the intermediate-mass range {ital M}{sub {ital Z}}{lt}{ital M}{sub {ital H}}{lt}2{ital M}{sub {ital W}}. If {ital b}{prime}{r arrow}{ital b}{gamma} is observed then the strict limit {ital M}{sub {ital H}}{gt}{ital m}{sub {ital b}{prime}}{minus}{ital m}{sub {ital b}} is implied for {ital m}{sub {ital b}{prime}}{lt}{ital M}{sub {ital Z}}. We study the singularities exhibited by the effective flavor-changing neutral-current vertex {ital b}{prime}{ital bH} and identify them as anomalous thresholds. Experimental prospects are discussed.

• OSTI ID: 5664356
• Journal Information: Physical Review, D (Particles Fields); (USA), Vol. 43:11; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
HIGGS BOSONS
PARTICLE PRODUCTION
QUARKS
DECAY
BEAUTY PARTICLES
BRANCHING RATIO
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FLAVOR MODEL
KOBAYASHI-MASKAWA MATRIX
MASS
MATRIX ELEMENTS
QUANTUM CHROMODYNAMICS
STANDARD MODEL
COMPOSITE MODELS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
MATHEMATICAL MODELS
MATRICES
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM FIELD THEORY
QUARK MODEL
UNIFIED GAUGE MODELS
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645203* - High Energy Physics- Particle Interactions & Properties-Theoretical- Weak Interactions & Properties
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