Author: Emma Anne IdealPublisher:
ISBN:
Category :
Languages : en
Pages : 328
Book Description
A Search for the Standard Model Higgs Boson Produced in Association with a Vector Boson and Decayig to a Hadronically-decaying Tau Pair at ATLAS
Author: Emma Anne IdealSearch for the Standard Model Higgs Boson Produced in Association with a Vector Boson and Decaying Into a Tau Pair in Pp Collisions at S
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A search for the standard model Higgs boson produced in association with a vector boson with the decay H → ?? is presented. The data correspond to 20.3 fb-1 of integrated luminosity from proton-proton collisions at √s=8 TeV recorded by the ATLAS experiment at the LHC during 2012. The data agree with the background expectation, and 95% confidence-level upper limits are placed on the cross section of this process. The observed (expected) limit, expressed in terms of the signal strength ? = ?/?SM for mH = 125 GeV, is ?
Search for the Standard Model Higgs Boson Produced in Association with a Vector Boson and Decaying to a B-quark Pair with the ATLAS Detector
Author: Ben Harry SmartSearch for the Standard Model Higgs Boson Produced in Association with a Vector Boson and Decaying Into a Tau Pair in [math Display
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A search for the standard model Higgs boson produced in association with a vector boson with the decay H → [tau][tau] is presented. The data correspond to 20.3 fb-1 of integrated luminosity from proton-proton collisions at √s=8 TeV recorded by the ATLAS experiment at the LHC during 2012. The data agree with the background expectation, and 95% confidence-level upper limits are placed on the cross section of this process. The observed (expected) limit, expressed in terms of the signal strength [mu] = [sigma]/[sigma]SM for mH = 125 GeV, is [mu]
Search for the Standard Model Higgs Boson Produced in Association with Top Quarks and Decaying Into a B ̄ B Pair in P P Collisions at √ S
Author: Felix BührerEvidence for the Standard Model Higgs Boson Decaying to One Semi-hadronically Decaying Tau and One Leptonically Decaying Tau at ATLAS
Author: Michel Trottier-McDonaldPublisher:
ISBN:
Category :
Languages : en
Pages : 269
Book Description
This thesis reports the search for the Higgs boson decaying to a pair of tau leptons, where one tau decays leptonically and the other decays semi-hadronically. The search was conducted by the ATLAS experiment on the proton-proton collisions supplied by the LHC in 2012. It is complicated by background from a mix of known processes from the Standard Model of Particle Physics. It makes use of boosted decision trees to separate the Higgs signal from the background. The gluon-gluon fusion and the vector boson fusion production mechanisms are searched for separately. The statistical significance of the excess observed over the background-only hypothesis is 3.3 standard deviations, and reaches 4.1 standard deviations when combined with other ditau channels. The observed signal appears fully compatible with the Higgs boson of the Standard Model.
A Search for the Standard Model Higgs Boson Produced in Association with Dileptonically Decaying Top Quarks and Decaying Into a Pair of Bottom Quarks with the ATLAS Detector
Author: Callum KilbyA Search for the Higgs Boson Produced in Association With a Vector Boson Using the ATLAS Detector at the LHC.
Author: Kevin MercurioPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
This dissertation presents two searches for the Standard Model Higgs boson produced in association with a vector boson and decaying via $H\to b\bar{b}$. Specifically, the processes are: \llbb\ alone, and again in combination with the \vvbb\ and \lvbb\ processes. The dataset used for the analysis consists of 4.7 fb$ {-1}$ at $\sqrt{s} = $7~TeV and 20.3 fb$ {-1}$at $\sqrt{s} = $8~TeV from LHC collisions. The search was optimized without bias to a particular mass of the Standard Model Higgs boson.
Search for the Standard Model Higgs Boson in Tau Lepton Final States
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 245
Book Description
We present a search for the standard model Higgs boson in final states with an electron or muon and a hadronically decaying tau lepton in association with zero, one, or two or more jets using data corresponding to an integrated luminosity of up to 7.3 fb−1 collected with the D0 detector at the Fermilab Tevatron collider. The analysis is sensitive to Higgs boson production via gluon gluon fusion, associated vector boson production, and vector boson fusion, and to Higgs boson decays to tau lepton pairs or W boson pairs. Observed (expected) limits are set on the ratio of 95% C.L. upper limits on the cross section times branching ratio, relative to those predicted by the Standard Model, of 14 (22) at a Higgs boson mass of 115 GeV and 7.7 (6.8) at 165 GeV.
Search for the Standard Model Higgs Boson Produced in Association with a Standard W Or a Z Boson and Decaying to Bottom Quarks
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 49
Book Description
A search for the standard model Higgs boson (H) decaying to b b-bar when produced in association with a weak vector boson (V) is reported for the following channels: W(mu nu)H, W(e nu)H, W(tau nu)H, Z(mu mu)H, Z(e e)H, and Z(nu nu)H. The search is performed in data samples corresponding to integrated luminosities of up to 5.1 inverse femtobarns at sqrt(s) = 7 TeV and up to 18.9 inverse femtobarns at sqrt(s) = 8 TeV, recorded by the CMS experiment at the LHC. An excess of events is observed above the expected background with a local significance of 2.1 standard deviations for a Higgs boson mass of 125 GeV, consistent with the expectation from the production of the standard model Higgs boson. The signal strength corresponding to this excess, relative to that of the standard model Higgs boson, is 1.0 +/- 0.5./abstract