A SEARCH FOR HIGGS DECAYS TO WW* AT DØ

2005 ◽  
Vol 20 (15) ◽  
pp. 3297-3301
Author(s):  
◽  
AMBER JENKINS
Keyword(s):  
Higgs Boson ◽  
Cross Section ◽  
Confidence Level ◽  
Production Cross Section ◽  
Production Cross ◽  
Branching Ratio ◽  
Final States ◽  
Theoretical Predictions ◽  
Integrated Luminosity

A search for the Higgs boson in the channels [Formula: see text] at DØ is described. The data, corresponding to an integrated luminosity of up to 177 pb-1, are compared to theoretical predictions. No excess of events above the expected background is observed in any of the leptonic final states. Limits on the production cross-section times branching ratio, σ × BR(H → WW*), are therefore set at the 95% Confidence Level.

Search for light gauge boson Zμτ via tt̄h1 production at LHC

2018 ◽  
Vol 33 (21) ◽  
pp. 1850124
Author(s):  
Jin-Xin Hou ◽  
Chong-Xing Yue ◽  
Yu-Chen Guo
Keyword(s):  
Higgs Boson ◽  
Cross Section ◽  
Gauge Boson ◽  
Production Cross Section ◽  
Production Cross ◽  
Text Production ◽  
Text Model ◽  
Free Parameters ◽  
Integrated Luminosity

We consider the production of the new gauge boson [Formula: see text] predicted by the [Formula: see text] model via SM-like Higgs boson [Formula: see text] decaying in the [Formula: see text] production at LHC. Considering the current constraints on the relevant free parameters, we calculate its production cross-section and further investigate the possibility of detecting [Formula: see text] through the process [Formula: see text] at LHC. We find that [Formula: see text] might be detected via this process at LHC with high integrated luminosity.

Prospects for Observing $t\bar tH$ at Run II: A discovery mode for the Higgs boson?

2001 ◽  
Vol 16 (supp01a) ◽  
pp. 308-310 ◽  
Author(s):  
J. Goldstein ◽  
C. S. Hill ◽  
J. Incandela ◽  
Stephen Parke ◽  
D. Rainwater ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Cross Section ◽  
Top Quark ◽  
Production Cross Section ◽  
Production Cross ◽  
Branching Ratio ◽  
Higgs Bosons ◽  
Standard Model Higgs Boson ◽  
High Luminosity ◽  
Associated Production

The production of a Standard Model Higgs boson in association with a top quark pair at the upcoming high luminosity run (15 fb -1 integreted luminosity) of the Fermilab Tevatron [Formula: see text] is revisited. For Higgs masses below 140 GeV we demonstrate that the production cross section times branching ratio for [Formula: see text] decays yields a significant number of events and that this mode is competitive with and complementary to the searches using [Formula: see text], ZH associated production. For higher mass Higgs bosons the H → W+ W- decays are more difficult but have the potential to provide a few spectacular events.

scholarly journals Search for a heavy Higgs boson decaying into two lighter Higgs bosons in the ττbb final state at 13 TeV

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
◽  
A. Tumasyan ◽  
W. Adam ◽  
J. W. Andrejkovic ◽  
T. Bergauer ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Cross Section ◽  
Production Cross Section ◽  
Production Cross ◽  
Branching Fractions ◽  
Center Of Mass ◽  
Final State ◽  
Signal Process ◽  
Center Of Mass Energy ◽  
Heavy Higgs Boson

Abstract A search for a heavy Higgs boson H decaying into the observed Higgs boson h with a mass of 125 GeV and another Higgs boson hS is presented. The h and hS bosons are required to decay into a pair of tau leptons and a pair of b quarks, respectively. The search uses a sample of proton-proton collisions collected with the CMS detector at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 137 fb−1. Mass ranges of 240–3000 GeV for mH and 60–2800 GeV for $$ {m}_{{\mathrm{h}}_{\mathrm{S}}} $$ m h S are explored in the search. No signal has been observed. Model independent 95% confidence level upper limits on the product of the production cross section and the branching fractions of the signal process are set with a sensitivity ranging from 125 fb (for mH = 240 GeV) to 2.7 fb (for mH = 1000 GeV). These limits are compared to maximally allowed products of the production cross section and the branching fractions of the signal process in the next-to-minimal supersymmetric extension of the standard model.

MEASUREMENT OF THE TOP QUARK PAIR PRODUCTION CROSS SECTION IN LEPTON+JETS FINAL STATES AT DØ USING A MULTIVARIATE TECHNIQUE

2005 ◽  
Vol 20 (14) ◽  
pp. 3177-3179
Author(s):  
◽  
TOBIAS GOLLING
Keyword(s):  
Pair Production ◽  
Cross Section ◽  
Top Quark ◽  
Production Cross Section ◽  
Production Cross ◽  
Final States ◽  
Multivariate Technique ◽  
Text Production ◽  
Lepton Jets ◽  
Pair Production Cross Section

A measurement of the [Formula: see text] production cross-section at [Formula: see text] with the DØ detector at the Fermilab Tevatron, based on the application of a multivariate topological method is presented. The integrated luminosity corresponds to 143.9 pb-1 in the μ+jets and 141.2 pb-1 in the e+jets channel. The preliminary cross-section is measured to be [Formula: see text].

scholarly journals Cross Section Prediction for Inclusive Production of Z Boson in pp Collisions at s=14 TeV: A Study of Systematic Uncertainty due to Scale Dependence

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Hasan Ogul ◽  
Kamuran Dilsiz
Keyword(s):  
Cross Section ◽  
Production Cross Section ◽  
Z Boson ◽  
Production Cross ◽  
Branching Ratio ◽  
Leading Order ◽  
Proton Proton ◽  
Proton Collisions ◽  
Central Values ◽  
Proton Proton Collisions

Prediction of Z→l+l- production cross section (where l±=e±,μ±) in proton-proton collisions at s=14 TeV is estimated up to next-to-next-to-leading order (NNLO) in perturbative QCD including next-to-leading order (NLO) electroweak (EW) corrections. The total inclusive Z boson production cross section times leptonic branching ratio, within the invariant mass window 66<mll<116 GeV, is predicted using NNLO HERAPDF2.0 at NNLO QCD and NLO EW as σZTot=2111.69-26.92+26.31 (PDF) ±11 (αs) ±17 (scale) -30.98+57.41 (parameterization and model). Theoretical prediction of the fiducial cross section is further computed with the latest modern PDF models (CT14, MMHT2014, NNPDF3.0, HERAPDF2.0, and ABM12) at NNLO for QCD and NLO for EW. The central values of the predictions are based on DYNNLO 1.5 program and the uncertainties are extracted using FEWZ 3.1 program. In addition, the cross section is also calculated as functions of μR and μF scales. The choice of μR and μF for scale variation uncertainty is further discussed in detail.

scholarly journals Hadronic vacuum polarization and e+e− → μ+μ− cross section: Reanalysis with new precise data for σh with 4π final states included

2018 ◽  
Vol 179 ◽  
pp. 01021
Author(s):  
Vladimir Sauli
Keyword(s):  
Cross Section ◽  
Production Cross Section ◽  
Interference Effect ◽  
Vacuum Polarization ◽  
Production Cross ◽  
Optical Theorem ◽  
Final States ◽  
Precise Data ◽  
Polarization Functions ◽  
Comparison With Experiments

The interference effect between leptonic radiative corrections and hadronic polarization functions is calculated via optical theorem for μ–pair production in vicinity of narrow resonances. Within seven most dominant exclusive channels of the production cross section σh(e+e− → hadrons) one achieves high acuracy which is necessary for the comparison with experiments. The result is compared with KLOE and KLOE2 experiments for μ−μ+ and μ−μ+γ productions at φ and ω/ρ meson energy.

CONSTRAINTS ON NEUTRAL BOSONS OF THESp(6)L⊗U(1)YMODEL

2002 ◽  
Vol 17 (09) ◽  
pp. 1273-1278 ◽  
Author(s):  
ALI A. BAGNEID
Keyword(s):  
Cross Section ◽  
Gauge Boson ◽  
Production Cross Section ◽  
Production Cross ◽  
Hadron Collider ◽  
Branching Ratio ◽  
Direct Search ◽  
Neutral Gauge Boson ◽  
Lower Limits ◽  
Hadronic Collisions

Lower limits are calculated on the mass of an additional neutral gauge boson, Z′, suggested by the Sp (6)L⊗ U (1)Ymodel, using direct search limits at hadron collider. We found that MZ′≥ 655 GeV . The production cross-section times branching ratio of Z′ decaying into dileptons in hadronic collisions, is found to be generation dependent and can be used to distinguish the model.

scholarly journals Measurement of the tt¯ production cross section in pp¯ collisions at s=1.96 TeV in dilepton final states

2005 ◽  
Vol 626 (1-4) ◽  
pp. 55-64 ◽  
Author(s):  
V.M. Abazov ◽  
B. Abbott ◽  
M. Abolins ◽  
B.S. Acharya ◽  
M. Adams ◽  
...  
Keyword(s):  
Cross Section ◽  
Production Cross Section ◽  
Production Cross ◽  
Final States ◽  
Dilepton Final States
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