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Search For Charged Higgs Bosons In Decays Of Top Quarks In Proton Antiproton Collisions At U221as
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Book Synopsis Search for Charged Higgs Bosons in Decays of Top Quarks in Proton - Antiproton Collisions at {u221A}s by :
Download or read book Search for Charged Higgs Bosons in Decays of Top Quarks in Proton - Antiproton Collisions at {u221A}s written by and published by . This book was released on 2009 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation we report on the first direct search for charged Higgs bosons in decays of top quarks in p$ar{p}$ collisions at √s = 1.96 TeV. The search uses a data sample with an integrated luminosity of 2.2 fb-1 collected by the CDF II detector at Fermilab and looks for a resonance in the invariant mass distribution of two jets in the lepton+jets sample of t$ar{t}$ candidates. We observe no evidence of charged Higgs bosons in top quark decays; hence 95% C.L. upper limits on the branching ratio are placed at ?(t → H+b) 0.1 to 0.3 for charged Higgs boson masses of 60 to 150 GeV/csup2/sup assuming ?(Hsup+/sup → c$ar{s}$) = 1.0 and ?(t → Wb)+?(t → Hsup+/supb) = 1.0. The upper limits on ?(t → Hsup+
Book Synopsis Search for Charged Higgs Bosons in Decays of Top Quarks in Proton - Antiproton Collisions at S**1/2 by :
Download or read book Search for Charged Higgs Bosons in Decays of Top Quarks in Proton - Antiproton Collisions at S**1/2 written by and published by . This book was released on 2009 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation we report on the first direct search for charged Higgs bosons in decays of top quarks in p{bar p} collisions at √s = 1.96 TeV. The search uses a data sample with an integrated luminosity of 2.2 fb−1 collected by the CDF II detector at Fermilab and looks for a resonance in the invariant mass distribution of two jets in the lepton+jets sample of t{bar t} candidates. We observe no evidence of charged Higgs bosons in top quark decays; hence 95% C.L. upper limits on the branching ratio are placed at [Beta](t → H+b)
Book Synopsis Search for Charged Higgs Bosons in Decays of Top Quarks in Proton-antiproton Collisions at [square Root Symbol] S by : Geum Bong Yu
Download or read book Search for Charged Higgs Bosons in Decays of Top Quarks in Proton-antiproton Collisions at [square Root Symbol] S written by Geum Bong Yu and published by . This book was released on 2009 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Search for Charged Higgs Boson Decays of the Top Quark Using Hadronic Decays of the Tau Lepton in Proton-antiproton Collisions at Square Root S by :
Download or read book A Search for Charged Higgs Boson Decays of the Top Quark Using Hadronic Decays of the Tau Lepton in Proton-antiproton Collisions at Square Root S written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Standard Model predicts the existence of one neutral scalar Higgs boson, which is a remnant of the mechanism that breaks the SU(2)[sub L]xU(1)[sub Y] electroweak symmetry and generates masses for the heavy vector bosons and fermions. Many extensions to the Standard Model predict two or more Higgs doublets, resulting in a larger spectrum of Higgs bosons including a charged Higgs boson (H[sup [+-]]). For a light charged Higgs boson mass, the top decay into a charged Higgs boson and bottom quark might occur. This thesis presents results of a direct search for this top quark decay mode via the charged Higgs decay to a tau lepton and tau-neutrino, using the hadronic decays of the tau leptons. The search data consist of 100 pb[sup -1] of Run 1 data collected between 1992-1995 at the CDF detector, from p[anti p] collisions at a center-of-mass energy of 1.8 TeV produced at Fermilab's Tevatron accelerator. A total of seven events are observed in two search channels with an expected background contribution of 7.4[+-]2.0 events coming from fake taus (5.4[+-]1.5), heavy vector boson decays with jets (1.9[+-]1.3) and dibosons(0.08[+-]0.06). Lacking evidence for a signal, we set limits on charged Higgs production at the 95% confidence level in the charged Higgs mass plane versus tan[beta](a parameter of the theory) for a top quark mass of 175 GeV/c[sup 2] and for top production cross sections ([sigma][sub t[anti t]]) of 5.0 and 7.5 pb, assuming the Type-II Two-Higgs-Doublet-Model. For large tan[beta], this analysis excludes a charged Higgs boson of mass below 147(158)GeV/c[sup 2] for [sigma][sub t[anti t]]=5.0(7.5)pb. Using the Standard Model measured top quark cross section from CDF, this limit increases to 168 GeV/c[sup 2] and we also exclude a branching fraction of top decays via this charged Higgs mode of greater than 43% for charged Higgs masses below 168 GeV/c[sup 2].
Book Synopsis A Search for Top Quark Decays to a Charged Higgs Boson in Proton-antiproton Collisions at a Center-of-mass Energy of 1.8 TeV by : Brendan Bevensee
Download or read book A Search for Top Quark Decays to a Charged Higgs Boson in Proton-antiproton Collisions at a Center-of-mass Energy of 1.8 TeV written by Brendan Bevensee and published by . This book was released on 1999 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Search for the Charged Higgs Boson Decays of the Top Quark Using Hadronic Decays of the Tau Lepton in Proton-antiproton Collisions at [square Root]s by : Leslie Stevan Groer
Download or read book A Search for the Charged Higgs Boson Decays of the Top Quark Using Hadronic Decays of the Tau Lepton in Proton-antiproton Collisions at [square Root]s written by Leslie Stevan Groer and published by . This book was released on 1998 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Charged Higgs Bosons Decaying to Top and Bottom Quarks in Proton-antiproton Collisions by : Gustavo Kertzscher Schwencke
Download or read book Search for Charged Higgs Bosons Decaying to Top and Bottom Quarks in Proton-antiproton Collisions written by Gustavo Kertzscher Schwencke and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Charged Higgs Bosons Decaying to Top and Bottom Quarks in Proton-antiproton Collisions by : Gustavo Kertzscher
Download or read book Search for Charged Higgs Bosons Decaying to Top and Bottom Quarks in Proton-antiproton Collisions written by Gustavo Kertzscher and published by . This book was released on 2008 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Charged Higgs Bosons in Decays of Top Quarks in P Anti-p Collisions at S**ư by :
Download or read book Search for Charged Higgs Bosons in Decays of Top Quarks in P Anti-p Collisions at S**ư written by and published by . This book was released on 2009 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on the first direct search for charged Higgs bosons in decays of top quarks in p{bar p} collisions at √s = 1.96 TeV. The search uses a data sample corresponding to an integrated luminosity of 2.2 fb−1 collected by the CDF II detector at Fermilab, and looks for a resonance in the invariant mass distribution of two jets in the lepton+jets sample of t{bar t} candidates. We observe no evidence of charged Higgs bosons in top quark decays. Hence, 95% upper limits on the top quark decay branching ratio are placed at?(t → Hb)
Book Synopsis Search for Charged Higgs Bosons in Decays of Top Quarks in P Anti-p Collisions at S**1/2 by :
Download or read book Search for Charged Higgs Bosons in Decays of Top Quarks in P Anti-p Collisions at S**1/2 written by and published by . This book was released on 2009 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on the first direct search for charged Higgs bosons in decays of top quarks in p{bar p} collisions at √s = 1.96 TeV. The search uses a data sample corresponding to an integrated luminosity of 2.2 fb−1 collected by the CDF II detector at Fermilab, and looks for a resonance in the invariant mass distribution of two jets in the lepton+jets sample of t{bar t} candidates. We observe no evidence of charged Higgs bosons in top quark decays. Hence, 95% upper limits on the top quark decay branching ratio are placed at [Beta](t → H+b)
Book Synopsis Srch for Charged Higgs Bosons Decaying to Top and Bottom Quarks in Proton-antiproton Collisions by :
Download or read book Srch for Charged Higgs Bosons Decaying to Top and Bottom Quarks in Proton-antiproton Collisions written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Charged Higgs Bosons from Top Quark Decays in $p\bar{p}$ Collisions at $\sqrt{s} by :
Download or read book Search for Charged Higgs Bosons from Top Quark Decays in $p\bar{p}$ Collisions at $\sqrt{s} written by and published by . This book was released on 2005 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Charged Higgs Bosons Decaying Into Top and Bottom Quarks with Single-lepton Final States Using Pp Collisions Collected at a Centre-of-mass Energy of 13 TeV by the ATLAS Detector by : Francesco Peri
Download or read book Search for Charged Higgs Bosons Decaying Into Top and Bottom Quarks with Single-lepton Final States Using Pp Collisions Collected at a Centre-of-mass Energy of 13 TeV by the ATLAS Detector written by Francesco Peri and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Charged Higgs Bosons in Top Quark Pair Decays at DO by : Eric Hartel Smith
Download or read book Search for Charged Higgs Bosons in Top Quark Pair Decays at DO written by Eric Hartel Smith and published by . This book was released on 1999 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Charged Higgs Bosons in Decays of Pair-produced Top Quarks at by :
Download or read book Search for Charged Higgs Bosons in Decays of Pair-produced Top Quarks at written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a search for t[r-arrow] bH[sup+] in t[bar t] candidate events at D0 based on two methods. The first seeks a deficit in signal relative to expectations from the standard model (SM). Such a deficit would imply the presence of a non-SM decay of the top quark. This search involves the full data sample of[approx] 110 pb[sup[minus]1] of p[bar p] collisions at[radical]s= 1.8 TeV, collected with the D0 detector. The second method looks for charged Higgs decays to[tau] leptons (and associated neutrinos), and is based on a 62 pb[sup[minus]1] subset of the aforementioned data sample.
Book Synopsis Search for Higgs Bosons Decaying to aa in the ???? Final State in pp Collisions at {u221A}s by :
Download or read book Search for Higgs Bosons Decaying to aa in the ???? Final State in pp Collisions at {u221A}s written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for the decay to a pair of new particles of either the 125 GeV Higgs boson (h) or a second charge parity (CP)-even Higgs boson (H) is presented. The data set corresponds to an integrated luminosity of 20.3 fb-1 of pp collisions at √s = 8 TeV recorded by the ATLAS experiment at the LHC in 2012. The search was done in the context of the next-to-minimal supersymmetric standard model, in which the new particles are the lightest neutral pseudoscalar Higgs bosons (a). One of the two a bosons is required to decay to two muons while the other is required to decay to two ? leptons. No significant excess is observed above the expected backgrounds in the dimuon invariant mass range from 3.7 to 50 GeV. Upper limits are placed on the production of h → aa relative to the standard model gg → h production, assuming no coupling of the a boson to quarks. The most stringent limit is placed at 3.5% for ma = 3.75 GeV. Upper limits are also placed on the production cross section of H → aa from 2.33 to 0.72 pb, for fixed ma = 5 GeV with mH ranging from 100 to 500 GeV.
Book Synopsis Search for Top Quark Decays Via Higgs-boson-mediated Flavor-changing Neutral Currents in Pp Collisions at Sqrt(s) by :
Download or read book Search for Top Quark Decays Via Higgs-boson-mediated Flavor-changing Neutral Currents in Pp Collisions at Sqrt(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 is performed for Higgs-boson-mediated flavor-changing neutral currents in the decays of top quarks. The search is based on proton-proton collision data corresponding to an integrated luminosity of 19.7 inverse-femtobarns at a center-of-mass energy of 8 TeV collected with the CMS detector at the LHC. Events in which a top quark pair is produced with one top quark decaying into a charm or up quark and a Higgs boson (H), and the other top quark decaying into a bottom quark and a W boson are selected. The Higgs boson in these events is assumed to subsequently decay into either dibosons or difermions. No significant excess is observed above the expected standard model background, and an upper limit at the 95% confidence level is set on the branching fraction B(t -> Hc) of 0.40% and B(t -> Hu) of 0.55%, where the expected upper limits are 0.43% and 0.40\%, respectively. These results correspond to upper limits on the square of the flavor-changing Higgs boson Yukawa couplings.
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