Ratios of [ital W][sup [plus minus]][gamma] and [ital Z][gamma] cross sections: New tools in probing the weak boson sector at the Fermilab Tevatron

Journal Article · Sun Oct 31 23:00:00 EST 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.48.4103· OSTI ID:5970529

Baur, U ^[1]; Errede, S ^[2]; Ohnemus, J ^[3]

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1. Physics Department, Florida State University, Tallahassee, Florida 32306 (United States)
2. Physics Department, University of Illinois, Urbana, Illinois 61801 (United States)
3. Physics Department, University of Durham, DH1 3LE (United Kingdom)

The ratios [ital scrR][sub [gamma],][ital l] =[ital B]([ital Z][r arrow][ital l][sup +][ital l[minus]])[sigma]([ital Z][gamma])/[ital B]([ital W][r arrow][ital l][nu])[sigma]([ital W][sup [plus minus]][gamma]), [ital scrR][sub [gamma],[nu]] =[ital B]([ital Z][r arrow][bar [nu]][nu])[sigma]([ital Z][gamma])/[ital B]([ital W][r arrow][ital l][nu])[sigma]([ital W][sup [plus minus]][gamma]), [ital scrR][sub [ital W][gamma]]=[sigma]([ital W][sup [plus minus]][gamma])/[sigma]([ital W][sup [plus minus]]), and [ital scrR][sub [ital Z][gamma]]=[sigma]([ital Z][gamma])/[sigma]([ital Z]) are studied as tools to probe the electroweak boson self-interactions. As a function of the minimum photon transverse momentum, [ital scrR][sub [gamma],][ital l] and [ital scrR][sub [gamma],[nu]] are found to directly reflect the radiation zero present in [ital W][sup [plus minus]][gamma] production in the standard model. All four ratios are sensitive to anomalous [ital WW][gamma] and/or [ital ZZ][gamma]/[ital Z][gamma][gamma] couplings. The sensitivity of the cross-section ratios to the cuts imposed on the final-state particles, as well as the systematic uncertainties resulting from different parametrizations of parton distribution functions, the choice of the factorization scale [ital Q][sup 2], and from higher-order QCD corrections, are explored. Taking into account these uncertainties, sensitivity limits for anomalous three gauge boson couplings, based on a measurement of the cross-section ratios with an integrated luminosity of 25 pb[sup [minus]1] at the Fermilab Tevatron, are estimated.

• DOE Contract Number: FG02-91ER40677; FG05-87ER40319
• OSTI ID: 5970529
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 48:9; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662230 -- Quantum Chromodynamics-- (1992-)
662340* -- Hadron Interactions-- (1992-)
662380 -- Decays of Intermediate Bosons-- (1992-)
662440 -- Properties of Other Particles Including Hypothetical Particles-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BOSONS
BRANCHING RATIO
CORRECTIONS
CROSS SECTIONS
CYCLIC ACCELERATORS
ELEMENTARY PARTICLES
FACTORIZATION
FERMILAB TEVATRON
FIELD THEORIES
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LINEAR MOMENTUM
MASSLESS PARTICLES
MATHEMATICAL MODELS
PARTICLE MODELS
PHOTONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
STANDARD MODEL
SYNCHROTRONS
TRANSVERSE MOMENTUM
UNIFIED GAUGE MODELS