Intermediate- and heavy-Higgs-boson physics at a 0. 5 TeV e sup + e minus collider

Journal Article · Sun Nov 01 00:00:00 EST 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.46.3725· OSTI ID:7073131

Barger, V; Cheung, K ^[1]; Kniehl, B A ^[2]; Phillips, R J.N. ^[3]

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1. Physics Department, University of Wisconsin, Madison, Wisconsin 53706 (United States)
2. Deutsches Elektronen-Synchrotron, D-2000 Hamburg 52 (Germany)
3. Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX (United Kingdom)

We explore the potential of a future {ital e}{sup +}{ital e{minus}} collider in the 0.5 TeV center-of-mass energy range to detect intermediate or heavy Higgs bosons in the standard model. We first briefly assess the logistics for finding a Higgs boson of intermediate mass, with {ital M}{sub {ital Z}}{lt}{ital m}{sub {ital H}}{lt}2{ital M}{sub {ital W}}. We then study in detail the possibility of detecting a heavy Higgs boson, with {ital m}{sub {ital H}}{gt}2{ital M}{sub {ital W}}, through the production of pairs of weak bosons. We quantitatively analyze the sensitivity of the process {ital e}{sup +}{ital e{minus}}{r arrow}{nu}{bar {nu}}{ital W}{sup +}{ital W{minus}}({ital ZZ}) to the presence of a heavy-Higgs-boson resonance in the standard model. We compare this signal to various backgrounds and to the smaller signal from {ital e}{sup +}{ital e{minus}}{r arrow}{ital ZH}{r arrow}{mu}{sup +}{mu}{sup {minus}}{ital W+}{ital W{minus}}({ital ZZ}), assuming the weak-boson pairs to be detected and measured in their dominant hadronic decay modes {ital W}{sup +}{ital W{minus}}({ital ZZ}){r arrow}4 jets. A related Higgs-boson signal in 6-jet final states is also estimated. We show how the main backgrounds from {ital e}{sup +}{ital e{minus}}{ital W+}{ital W{minus}}({ital ZZ}), {ital e}{nu}{ital WZ}, and {ital t{bar t}} production can be reduced by suitable acceptance cuts. Bremsstrahlung and typical beamstrahlung corrections are calculated. These corrections reduce Higgs-boson production by scattering mechanisms but increase production by annihilation mechanisms; they also smear out some dynamical features such as Jacobian peaks in {ital p}{sub {ital T}}({ital H}). With all these corrections included, we conclude that it should be possible to detect a heavy-Higgs-boson signal in the {nu}{bar {nu}}{ital W}{sup +}{ital W{minus}}({ital ZZ}) channels up to mass {ital m}{sub {ital H}}=350 GeV.

• DOE Contract Number: AC02-76ER00881
• OSTI ID: 7073131
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 46:9; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Pa
ELECTRON-POSITRON INTERACTIONS
ANNIHILATION
HIGGS BOSONS
PARTICLE PRODUCTION
INTERMEDIATE VECTOR BOSONS
ANTINEUTRINOS
BREMSSTRAHLUNG
GEV RANGE 100-1000
JET MODEL
MASS
MUONS MINUS
MUONS PLUS
NEUTRINOS
STANDARD MODEL
SYMMETRY BREAKING
W MINUS BOSONS
W PLUS BOSONS
Z NEUTRAL BOSONS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BASIC INTERACTIONS
BOSONS
ELECTROMAGNETIC INTERACTIONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
INTERACTIONS
INTERMEDIATE BOSONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATTER
MUONS
PARTICLE INTERACTIONS
PARTICLE MODELS
POSTULATED PARTICLES
RADIATIONS
UNIFIED GAUGE MODELS
662310* - Weak & Electromagnetic Interactions of Leptons- (1992-)
662120 - General Theory of Particles & Fields- Symmetry
Conservation Laws
Currents & Their Properties- (1992-)
662210 - Specific Theories & Interaction Models
Particle Systematics- Unified Theories & Models- (1992-)