Rapidity correlations in [ital W][gamma] production at hadron colliders

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

DOI:https://doi.org/10.1103/PhysRevD.50.1917· OSTI ID:7272789

Baur, U ^[1]; Errede, S ^[2]; Landsberg, G ^[3]

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1. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
2. Physics Department, University of Illinois, Urbana, Illinois 61801 (United States)
3. Physics Department, State University of New York at Stony Brook, Stony Brook, New York 11794 (United States)

We study the correlation of photon and charged lepton pseudorapidities, [eta]([gamma]) and [eta]([ital l]), [ital l]=[ital e],[mu], in [ital pp][sup ([minus])][r arrow][ital W][sup [plus minus]][gamma]+[ital X][r arrow][ital l][sup [plus minus]][ital ];sp[sub [ital T]][gamma]+[ital X]. In the standard model, the [Delta][eta]([gamma],[ital l])=[eta]([gamma])[minus][eta]([ital l]) differential cross section is found to exhibit a pronounced dip at [Delta][eta]([gamma],[ital l])[approx][minus plus]0.3 (=0) in [ital p[bar p]]([ital pp]) collisions, which originates from the radiation zero present in [ital q[bar q]][prime][r arrow][ital W][gamma]. The sensitivity of the [Delta][eta]([gamma],[ital l]) distribution to higher order QCD corrections, nonstandard [ital WW][gamma] couplings, the [ital W]+ jet fake'' background, and the cuts imposed is explored. At hadron supercolliders, next-to-leading order QCD corrections are found to considerably obscure the radiation zero. The advantages of the [Delta][eta]([gamma],[ital l]) distribution over other quantities which are sensitive to the radiation zero are discussed. We conclude that photon-lepton rapidity correlations at the Fermilab Tevatron offer a [ital unique] opportunity to search for the standard model radiation zero in hadronic [ital W][gamma] production.

• DOE Contract Number: FG02-91ER40677; FG05-87ER40319
• OSTI ID: 7272789
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 50:3; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662230 -- Quantum Chromodynamics-- (1992-)
662340* -- Hadron Interactions-- (1992-)
662440 -- Properties of Other Particles Including Hypothetical Particles-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BARYON-BARYON INTERACTIONS
BOSONS
CHARGED PARTICLES
CORRELATIONS
CROSS SECTIONS
CYCLIC ACCELERATORS
DIFFERENTIAL CROSS SECTIONS
ELEMENTARY PARTICLES
FERMILAB TEVATRON
FERMIONS
FIELD THEORIES
HADRON-HADRON INTERACTIONS
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
NUCLEON-ANTINUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PARTICLE RAPIDITY
PHOTONS
PROTON-ANTIPROTON INTERACTIONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
STANDARD MODEL
SYNCHROTRONS
UNIFIED GAUGE MODELS
W MINUS BOSONS
W PLUS BOSONS