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

Abstract

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.more » 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.« less

Authors:
;  [1];  [2];  [3]
  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)
Publication Date:
OSTI Identifier:
7073131
DOE Contract Number:  
AC02-76ER00881
Resource Type:
Journal Article
Journal Name:
Physical Review, D (Particles Fields); (United States)
Additional Journal Information:
Journal Volume: 46:9; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
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-)

Citation Formats

Barger, V, Cheung, K, Kniehl, B A, and Phillips, R J.N. Intermediate- and heavy-Higgs-boson physics at a 0. 5 TeV e sup + e minus collider. United States: N. p., 1992. Web. doi:10.1103/PhysRevD.46.3725.
Barger, V, Cheung, K, Kniehl, B A, & Phillips, R J.N. Intermediate- and heavy-Higgs-boson physics at a 0. 5 TeV e sup + e minus collider. United States. doi:10.1103/PhysRevD.46.3725.
Barger, V, Cheung, K, Kniehl, B A, and Phillips, R J.N. Sun . "Intermediate- and heavy-Higgs-boson physics at a 0. 5 TeV e sup + e minus collider". United States. doi:10.1103/PhysRevD.46.3725.
@article{osti_7073131,
title = {Intermediate- and heavy-Higgs-boson physics at a 0. 5 TeV e sup + e minus collider},
author = {Barger, V and Cheung, K and Kniehl, B A and Phillips, R J.N.},
abstractNote = {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.},
doi = {10.1103/PhysRevD.46.3725},
journal = {Physical Review, D (Particles Fields); (United States)},
issn = {0556-2821},
number = ,
volume = 46:9,
place = {United States},
year = {1992},
month = {11}
}