Showing papers on "Search for the Higgs boson published in 2006"
TL;DR: In this article, a search for the standard model Higgs boson in H --> WW(*) decays with e+e-, e+/-mu-/+, and mu+mu- final states in pp collisions at a center-of-mass energy of square root of s = 1.96 TeV.
Abstract: We present a search for the standard model Higgs boson in H --> WW(*) decays with e+e-, e+/-mu-/+, and mu+mu- final states in pp collisions at a center-of-mass energy of square root of s = 1.96 TeV. The data, collected from April 2002 to June 2004 with the D0 detector, correspond to an integrated luminosity of 300-325 pb(-1), depending on the final state. The number of events observed is consistent with the expectation from backgrounds. Limits from the combination of all three channels on the Higgs boson production cross section times branching ratio sigma x BR(H --> WW(*) are presented.
11 citations
01 Apr 2006-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this article, genetic algorithms are used to separate the signal from the background in the Standard Model Higgs boson search at the LHC using PYTHIA 6.1 and produced at LHC energies.
Abstract: Genetic Algorithms are used to separate the signal from the background in the Standard Model Higgs boson search at LHC. Based on Monte Carlo events, using PYTHIA 6.1 and produced at LHC energies, two approaches are investigated. First discriminant function parameters and neural network connection weights are optimized. In a multidimensionnal search approach, hyperplanes and hypersurfaces are computed. In both cases, the performances are improved and the results compare favorably with other multivariate analysis.
8 citations
Posted Content•
TL;DR: In this paper, the authors present CDF and D0 searches for a Standard Model Higgs boson produced associatively with a W or Z boson at sqrt{s}=1.96 TeV using up to 1 fb^-1 of analyzed Tevatron data collected from February 2002 to February 2006.
Abstract: We present CDF and D0 searches for a Standard Model Higgs boson produced associatively with a W or Z boson at sqrt{s}=1.96 TeV using up to 1 fb^-1 of analyzed Tevatron data collected from February 2002 to February 2006. For Higgs masses less than 135 GeV/c^2, as is favored by experimental and theoretical constraints, WH->lnubb, ZH->llbb, and ZH->nunubb are the most sensitive decay channels to search for the Higgs boson. Both CDF and D0 have analyzed these three channels and found no evidence for Higgs production, and therefore set upper limits on the Higgs production cross-section. While the analyses are not yet sensitive to Standard Model Higgs production, improvements in analysis techniques are increasing sensitivity to the Higgs much faster than added luminosity alone.
5 citations
11 Nov 2006
TL;DR: A detailed study of the inclusive search for the Higgs boson in diphoton decay channel with CMS detector at LHC, based on full Monte Carlo simulation, designs an analysis that can determine the background from real data.
Abstract: We have carried out a detailed study of the inclusive search for the Higgs boson in diphoton decay channel with CMS detector at LHC. The analysis is based on full Monte Carlo simulation. Though for the moment we have only simulated data to work with, we have designed an analysis that can determine the background from real data. This largely reduces the systematic error and, together with the excellent resolution of the CMS electromagnetic calorimeter, enables a search that would otherwise be very difficult. We have studied both a standard cut-based analysis and more optimized analysis that takes advantage of the wide range of signal/background expectations as function of the possible selection cuts. Since discovery in this channel is expected to take one or more years of LHC running, such optimized analysis should be studied to minimize the time to discovery and to assure that the experiment is competitive in this important measurement.
1 citations
01 Jan 2006
TL;DR: In this article, the B 0! J = ψφ decays were investigated in the ATLAS experiment at the Large Hadron Collider (LHC) at the first and second trigger level.
Abstract: The primary goal of ATLAS experiment at LHC is to search for the Higgs boson and supersymmetry. However, other physics sectors like CP violation and rare B-decays, can be explored. The full proper-time and angular analyses allow several parameters of physics interest to be investigated using the B 0 ! J= ψφ decays. In the Bs sector measurements, special emphasis is made on the ΔMs. ATLAS will be able to reach ΔMs-regions that are today covered by the fit combining all existing data. By investigating rare decays of beauty mesons and baryons, ATLAS will be capable of performing sensitive tests of physics phenomena beyond the Standard Model. The effort concentrate especially on those rare B decays that can be identified already at the first and second trigger level.