Determination of [ital Z][prime] gauge couplings to quarks and leptons at future hadron colliders

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.48.R969· OSTI ID:7369059

del Aguila, F ^[1]; Cvetic, M; Langacker, P ^[2]

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1. Departemento de Fisica Teorica y del Cosmos Universidad de Granada, Granada, E-18071 (Spain)
2. Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6396 (United States) Department of Physics, University of Granada, Granada (Spain)

We point out that at future hadron colliders the ratio of cross sections for [ital pp][r arrow][ital Z][prime][r arrow][ital l][sup +][ital l[minus]] in two rapidity bins is a useful probe of the relative couplings of the [ital Z][prime] to [ital u] and [ital d] quarks. Combined with the forward-backward asymmetry, the rare decay modes [ital Z][prime][r arrow][ital Wl][nu][sub [ital l]], and three associated productions [ital pp][r arrow][ital Z][prime][ital V] ([ital V]=[ital Z],[ital W],[gamma]), and assuming interfamily universality, small [ital Z]-[ital Z][prime] mixing, and the [ital Z][prime] charge commuting with the SU(2)[sub [ital L]] generators, three out of four normalized couplings could be extracted. An analysis of the statistical uncertainties expected for the above probes at the CERN LHC for typical models with [ital M][sub [ital Z][prime]][congruent]1 TeV shows that one lepton coupling and two combinations of quark couplings could be determined to around 5%, 20%, and 30%, respectively. This allows for a clear distinction between models.

• DOE Contract Number: AC02-76ER03071
• OSTI ID: 7369059
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 48:3; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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662380 -- Decays of Intermediate Bosons-- (1992-)
662440 -- Properties of Other Particles Including Hypothetical Particles-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BASIC INTERACTIONS
BOSONS
COUPLINGS
CROSS SECTIONS
DECAY
ELEMENTARY PARTICLES
FERMIONS
HADRON-HADRON INTERACTIONS
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEPTONIC DECAY
LEPTONS
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PARTICLE RAPIDITY
POSTULATED PARTICLES
Pa
Particle Systematics-- Unified Theories & Models-- (1992-)
QUARKS
WEAK INTERACTIONS
WEAK PARTICLE DECAY
Z NEUTRAL BOSONS