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Search For The Standard Model Higgs Boson Produced In Association With A Z Boson In Pbarp Collisions At Sqrts
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Book Synopsis Search for the Standard Model Higgs Boson Produced in Association with a $Z$ Boson in $p\bar{p}$ Collisions at $\sqrt{s} by :
Download or read book Search for the Standard Model Higgs Boson Produced in Association with a $Z$ Boson in $p\bar{p}$ Collisions at $\sqrt{s} written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a search for the standard model Higgs boson produced in association with a Z boson, using up to 7.9 fb−1 of integrated luminosity from p{bar p} collisions collected with the CDF II detector. We utilize several novel techniques, including multivariate lepton selection, multivariate trigger parametrization, and a multi-stage signal discriminant consisting of specialized functions trained to distinguish individual backgrounds. By increasing acceptance and enhancing signal discrimination, these techniques have significantly improved the sensitivity of the analysis above what was expected from a larger dataset alone. We observe no significant evidence for a signal, and we set limits on the ZH production cross section. For a Higgs boson with mass 115 GeV/c2, we expect (observe) a limit of 3.9 (4.8) times the standard model predicted value, at the 95% credibility level.
Book Synopsis 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 by : Felix Bührer
Download or read book 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 written by Felix Bührer and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for a Higgs Boson Produced in Association with a Z Boson in P Anti-p Collisions by :
Download or read book Search for a Higgs Boson Produced in Association with a Z Boson in P Anti-p Collisions written by and published by . This book was released on 2007 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We describe a search for the standard model Higgs boson with a mass of 105 GeV/c2 to 145 GeV/c2 in data corresponding to an integrated luminosity of approximately 450 pb−1 collected with the D0 detector at the Fermilab Tevatron p{bar p} collider at a center-of-mass energy of 1.96 TeV. The Higgs boson is required to be produced in association with a Z boson, and the Z boson is required to decay to either electrons or muons with the Higgs boson decaying to a b{bar b} pair. The data are well described by the expected background, leading to 95% confidence level cross section upper limits [sigma]p{bar p} → ZH x B(H → b{bar b}) in the range of 3.1 pb to 4.4 pb.
Book Synopsis A Beauty-ful Boson by : Giulia Di Gregorio
Download or read book A Beauty-ful Boson written by Giulia Di Gregorio and published by Springer Nature. This book was released on 2023-01-01 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analysis described in this thesis is the search for the Higgs boson, decaying into bb pair, in the associated production with a vector boson, in the extreme Higgs boson transverse momentum region where the Higgs boson is reconstructed using the large-R jet technique. The use of the large-R jets allows to add a part of the phase space unexplored so far, which is particularly sensitive to possible new physics. The analysed data have been collected at LHC by the ATLAS detector between 2015 and 2018 at a centre-of-mass energy of √s = 13 TeV. The same dataset has been used to perform the differential pp → ZH and pp → WH cross-section measurements used to extract the information on the Higgs couplings and to put limits on Beyond the Standard Model effects. Furthermore the analysis has been re-used to perform a cross-section measurement of the diboson ZZ and WZ processes because the diboson and the Higgs processes have a similar topology. For the first time the ZZ(bb) and WZ(bb) cross-sections are measured at √s = 13 TeV and the observed cross-section measurements are consistent with the Standard Model predictions.
Book Synopsis Search for the Standard Model Higgs Boson Produced in Association with a Standard W Or a Z Boson and Decaying to Bottom Quarks by :
Download or read book Search for the Standard Model Higgs Boson Produced in Association with a Standard W Or a Z Boson and Decaying to Bottom Quarks written by and published by . This book was released on 2014 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Book Synopsis A Search for the Standard Model Higgs Boson Produced in Association with a W Boson by : Martin J. Frank
Download or read book A Search for the Standard Model Higgs Boson Produced in Association with a W Boson written by Martin J. Frank and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a search for a standard model Higgs boson produced in association with a W boson using data collected with the CDF II detector from proton/antiproton collisions at a center of mass energy of 1.96 TeV. The search is performed in the WH channel where the W boson decays leptonically and the Higgs boson decays to a bottom/antibottom quark pair. The two quarks usually fragment into two jets, but sometimes a third jet can be produced via gluon radiation, so we have increased the standard two-jet sample by including events that contain three jets. We reconstruct the Higgs boson using two or three jets depending on the kinematics of the event. We find an improvement in our search sensitivity using the larger sample together with this multijet reconstruction technique. Our data show no evidence of a Higgs boson, so we set 95% confidence level upper limits on the WH production rate. We set limits between 3.36 and 28.7 times the standard model prediction for Higgs boson masses ranging from 100 to 150 GeV/c^2.
Book Synopsis Searching for the Standard Model Higgs Boson Produced in Association with a Top-quark Pair in PP Collisions at the LHC by : Wuming Luo
Download or read book Searching for the Standard Model Higgs Boson Produced in Association with a Top-quark Pair in PP Collisions at the LHC written by Wuming Luo and published by . This book was released on 2014 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for the Standard Model Higgs Boson Produced in Association with a Z Boson in the Electron-muon Final State and the Higgs Boson Decaying Into Bottom Quarks by : Rachel A. Bartek
Download or read book Search for the Standard Model Higgs Boson Produced in Association with a Z Boson in the Electron-muon Final State and the Higgs Boson Decaying Into Bottom Quarks written by Rachel A. Bartek and published by . This book was released on 2013 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for the standard model Higgs boson is presented in the associated production channel Z ([Pi]) H (bb ) where each tau decays leptonically, one to an electron, the other to a muon and associated neutrinos. A data sample comprising of 5.0 fb[superscript -1] and 19.0 fb[superscript -1] from the 2011 and 2012 proton collision running periods at a center of mass of 7 and 8TeV, respectively, has been analyzed and 95% C.L. upper limits derived for Higgs masses of 110-135 GeV. vi
Book Synopsis Search for the Standard Model Higgs Boson Produced in Association with a Vector Boson and Decaying Into a Tau Pair in Pp Collisions at S by :
Download or read book Search for the Standard Model Higgs Boson Produced in Association with a Vector Boson and Decaying Into a Tau Pair in Pp Collisions at S written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 ?
Book Synopsis Search for Standard Model Higgs Boson Produced in Association with a Top Anti-top Quark Pair in 1.96 TeV Proton - Anti-proton Collisions by :
Download or read book Search for Standard Model Higgs Boson Produced in Association with a Top Anti-top Quark Pair in 1.96 TeV Proton - Anti-proton Collisions written by and published by . This book was released on 2006 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Standard Model Higgs Boson Produced in Association with a Top-Antitop Quark Pair in 1.96 TeV Proton-Antiproton Collisions by :
Download or read book Search for Standard Model Higgs Boson Produced in Association with a Top-Antitop Quark Pair in 1.96 TeV Proton-Antiproton Collisions written by and published by . This book was released on 2007 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the first search for Standard Model Higgs boson production in association with a top-antitop quark pair in proton-antiproton collisions at a centre of mass energy of 1.96 TeV. The integrated luminosity for othis search corresponds to 319 pb-1 of data recorded by the Collider Detector at Fermilab. We outline the even selection criteria, evaluate the even acceptance and estimate backgrounds from Standard Model sources. These events are observed that satisfy our event selection, while 2.16 ± 0.66 events are expected from background processes. no significant excess of events above background is thus observed, and we set 95% confidence level upper limits on the production cross section for this process as a function of the Higgs mass. For a Higgs boson mass of 115 GeV/c2 we find that [sigma]$t\bar{t}H$ x BR (H 2!bb)
Book Synopsis A Search for the Standard Model Higgs Boson Produced in Association with a $W$ Boson by :
Download or read book A Search for the Standard Model Higgs Boson Produced in Association with a $W$ Boson written by and published by . This book was released on 2011 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a search for a standard model Higgs boson produced in association with a W boson using data collected with the CDF II detector from p$ar{p}$ collisions at √s = 1.96 TeV. The search is performed in the WH → lvb$ar{b}$ channel. The two quarks usually fragment into two jets, but sometimes a third jet can be produced via gluon radiation, so we have increased the standard two-jet sample by including events that contain three jets. We reconstruct the Higgs boson using two or three jets depending on the kinematics of the event. We find an improvement in our search sensitivity using the larger sample together with this multijet reconstruction technique. Our data show no evidence of a Higgs boson, so we set 95% confidence level upper limits on the WH production rate. We set limits between 3.36 and 28.7 times the standard model prediction for Higgs boson masses ranging from 100 to 150 GeV/c2.
Book Synopsis Search for the Standard Model Higgs Boson in Its Associated Production with a W Vector Boson in P P-bar Collisions at Root S by : Hatim Hegab Ali Hegab
Download or read book Search for the Standard Model Higgs Boson in Its Associated Production with a W Vector Boson in P P-bar Collisions at Root S written by Hatim Hegab Ali Hegab and published by . This book was released on 2014 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: An observed (expected) upper limit of 4.5 (4.8) for a Higgs of mass 115 GeV was set on the ratio of the Higgs production to its decay branching ratio at the 95% confidence level.
Book Synopsis The Higgs Boson Produced With Top Quarks in Fully Hadronic Signatures by : Daniel Salerno
Download or read book The Higgs Boson Produced With Top Quarks in Fully Hadronic Signatures written by Daniel Salerno and published by Springer Nature. This book was released on 2019-10-25 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work presented in this PhD dissertation is the first search at CMS for Higgs bosons produced in association with top quarks (ttH) in a final state consisting of only jets. The results presented in this book uncover a new class of ttH events that will help us elucidate our understanding of the Yukawa sector interactions between the Higgs boson and the top quark. Despite this being the most common decay signature for ttH, a large contamination of SM backgrounds makes it the most challenging for extracting a signal from data. The PhD thesis presents many sophisticated tools and techniques that were developed in order to overcome these challenges. These tools pave the way for future analyses to investigate other standard model and beyond-standard model physics.
Book Synopsis Search for Standard Model Higgs Boson Produced in Association with a Top-antitop Quark Pair in 1.96 TeV Proton-antiproton Collisions by : Stanley T. Lai
Download or read book Search for Standard Model Higgs Boson Produced in Association with a Top-antitop Quark Pair in 1.96 TeV Proton-antiproton Collisions written by Stanley T. Lai and published by . This book was released on 2007 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the first search for Standard Model Higgs boson production in association with a top-antitop quark pair in proton-antiproton collisions at a centre of mass energy of 1.96 TeV. The integrated luminosity for this search corresponds to 319 pb-1 of data recorded by the Collider Detector at Fermilab. We outline the event selection criteria, evaluate the event acceptance and estimate backgrounds from Standard Model sources. Three events are observed that satisfy our event selection, while 2.16 +/- 0.66 events are expected from background processes. No significant excess of events above background is thus observed, and we set 95% confidence level upper limits on the production cross section for this process as a function of the Higgs mass. For a Higgs boson mass of 115 GeV/ c2, we find that sigmatt H x BR(H b b)
Book Synopsis Search for the Standard Model Higgs Boson Produced in Association with a Z Boson with the CMS Detector at the LHC by : Pierluigi Bortignon
Download or read book Search for the Standard Model Higgs Boson Produced in Association with a Z Boson with the CMS Detector at the LHC written by Pierluigi Bortignon and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Combined Results of Searches for the Standard Model Higgs Boson in Pp Collisions at Sqrt(s) by :
Download or read book Combined Results of Searches for the Standard Model Higgs Boson in Pp Collisions at Sqrt(s) written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Combined results are reported from searches for the standard model Higgs boson in proton-proton collisions at sqrt(s)=7 TeV in five Higgs boson decay modes: gamma pair, b-quark pair, tau lepton pair, W pair, and Z pair. The explored Higgs boson mass range is 110-600 GeV. The analysed data correspond to an integrated luminosity of 4.6-4.8 inverse femtobarns. The expected excluded mass range in the absence of the standard model Higgs boson is 118-543 GeV at 95% CL. The observed results exclude the standard model Higgs boson in the mass range 127-600 GeV at 95% CL, and in the mass range 129-525 GeV at 99% CL. An excess of events above the expected standard model background is observed at the low end of the explored mass range making the observed limits weaker than expected in the absence of a signal. The largest excess, with a local significance of 3.1 sigma, is observed for a Higgs boson mass hypothesis of 124 GeV. The global significance of observing an excess with a local significance greater than 3.1 sigma anywhere in the search range 110-600 (110-145) GeV is estimated to be 1.5 sigma (2.1 sigma). More data are required to ascertain the origin of this excess.
