Diagnostic power of future colliders for [ital Z][prime] couplings to quarks and leptons: [ital e][sup +][ital e][sup [minus]] versus [ital pp] colliders

Journal Article · Thu Sep 01 04:00:00 EDT 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.50.3158· OSTI ID:7241725

del Aguila, F ^[1]; Cvetic, M ^[2]

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

We study the diagnostic power of future [ital e][sup +][ital e][sup [minus]] colliders with [radical][ital s] =500 GeV [the Next Linear Collider (NLC)] for a model-independent determination of the [ital Z][prime] gauge couplings to quarks and leptons. The interference of the [ital Z][prime] propagator with the photon and the [ital Z] propagator in the two-fermion final state probes are sensitive to the magnitude as well as relative signs of quark and lepton charges. For [ital Z][prime] with [ital M][sub [ital Z][prime]][similar to]1 TeV [ital all] the quark and lepton charges can be determined to around 10--20%, provided heavy flavor tagging and longitudinal polarization of the electron beam is available. The errors are 2--10 times larger without polarization, and very little information can be obtained about quark charges without heavy flavor tagging. We point out the complementarity of future hadron colliders. At the CERN Large Hadron Collider (LHC) primarily the magnitude of three out of four corresponding couplings can be measured; however, their error bars are typically by a factor of [similar to]2 smaller than those at the NLC.

• OSTI ID: 7241725
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 50:5; ISSN 0556-2821; ISSN PRVDAQ
• Country of Publication: United States
• Language: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BARYON-BARYON INTERACTIONS
BEAMS
BOSONS
COUPLINGS
ELECTRON BEAMS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
HADRON-HADRON INTERACTIONS
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEPTON BEAMS
LEPTON-LEPTON INTERACTIONS
LEPTONS
LINEAR ACCELERATORS
LINEAR COLLIDERS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE BEAMS
PARTICLE INTERACTIONS
POLARIZATION
POSTULATED PARTICLES
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
QUARKS
Z NEUTRAL BOSONS