62 documents found, page 1 of 7
Search for right-handed W bosons in top quark decay
Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T.; Agelou, M.; Agram, J. L.; Ahn, S. H.; Ahsan, M.; Alexeev, G. D.Made available in DSpace on 2022-04-28T20:01:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-07-01; We present a measurement of the fraction f+ of right-handed W bosons produced in top quark decays, based on a candidate sample of tt̄ events in the lepton+jets decay mode. These data correspond to an integrated luminosity of 230pb-1, collected by the D0 detector at the Fermilab Tevatron pp̄ Collider at ...
Lifetime difference and CP-violating phase in the Bs0 system
Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T.; Aguilo, E.; Ahn, S. H.; Ahsan, M.; Alexeev, G. D.; Alkhazov, G.; Alton, A.Made available in DSpace on 2022-04-28T20:15:41Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-03-21; From an analysis of the decay Bs0→J/ψ, we obtain the width difference between the light and heavy mass eigenstates ΔΓ(ΓL- ΓH)=0.17±0.09(stat)±0.02(syst)ps-1 and the CP-violating phase s=-0.79±0.56(stat)-0.01+0.14(syst). Under the hypothesis of no CP violation (0), we obtain 1/Γ̄=τ̄(Bs0)=1.52±0.08(stat) ...
Search for top squark and higgsino production using diphoton higgs boson decays
Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Fabjan, C.; Friedl, M.; Frühwirth, R.Made available in DSpace on 2022-04-29T09:35:30Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-04-25; Science and Technology Facilities Council; Results are presented of a search for a natural supersymmetry scenario with gauge mediated symmetry breaking. It is assumed that only the supersymmetric partners of the top quark (the top squark) and the Higgs boson (Higgsino) are accessible. Events are examine...
Evidence of b -jet quenching in PbPb collisions at sNN =2.76TeV
Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Fabjan, C.; Friedl, M.; Frühwirth, R.Made available in DSpace on 2022-04-29T11:29:24Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-09-22; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); Centers for Medicare and Medicaid Services; U.S. Department of Energy; Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Austrian Science Fund; National Science Council Taiwan; National Stroke Foundation; National Science ...
Search for monotop signatures in proton-proton collisions at s =8TeV
Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Fabjan, C.; Friedl, M.; Frühwirth, R.; Ghete, V. M.Made available in DSpace on 2022-04-29T14:21:04Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-03-10; Results are presented from a search for new decaying massive particles whose presence is inferred from an imbalance in transverse momentum and which are produced in association with a single top quark that decays into a bottom quark and two light quarks. The measurement is performed using 19.7 fb-1 of d...
Measurement of prompt ψ (2S) to J /ψ yield ratios in Pb-Pb and p - p collisions...
Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Fabjan, C.; Friedl, M.; Frühwirth, R.; Ghete, V. M.Made available in DSpace on 2022-04-29T15:38:42Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-12-31; The ratio between the prompt ψ(2S) and J/ψ yields, reconstructed via their decays into μ+μ-, is measured in Pb-Pb and p-p collisions at sNN=2.76 TeV. The analysis is based on Pb-Pb and p-p data samples collected by CMS at the Large Hadron Collider, corresponding to integrated luminosities of 150 μb-1 an...
Transverse-momentum and pseudorapidity distributions of charged hadrons in pp c...
Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Fabjan, C.; Friedl, M.; Frühwirth, R.; Ghete, V. M.Made available in DSpace on 2022-04-28T21:02:12Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-07-06; Charged-hadron transverse-momentum and pseudorapidity distributions in proton-proton collisions at √s=7TeV are measured with the inner tracking system of the CMS detector at the LHC. The charged-hadron yield is obtained by counting the number of reconstructed hits, hit pairs, and fully reconstructed cha...
Study of the dijet mass spectrum in pp→W+jets events at √s=7 TeV
Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Aguilo, E.; Bergauer, T.; Dragicevic, M.; Erö, J.; Fabjan, C.; Friedl, M.Made available in DSpace on 2022-04-29T06:25:24Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-12-21; We report an investigation of the invariant mass spectrum of the two jets with highest transverse momentum in pp→W+2-jet and W+3-jet events to look for resonant enhancement. The data sample corresponds to an integrated luminosity of 5.0 fb-1 collected with the CMS detector at √s=7 TeV. We find no eviden...
Search for pair production of first-generation scalar leptoquarks in pp collisi...
Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Fabjan, C.; Friedl, M.; Frühwirth, R.; Ghete, V. M.Made available in DSpace on 2022-04-29T06:48:25Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-05-17; National Science Foundation; A search for pair production of first-generation scalar leptoquarks is performed in the final state containing two electrons and two jets using proton-proton collision data at √s=7TeV. The data sample used corresponds to an integrated luminosity of 33pb-1 collected with the ...
Search for pair production of second-generation scalar leptoquarks in pp collis...
Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Fabjan, C.; Friedl, M.; Frühwirth, R.; Ghete, V. M.Made available in DSpace on 2022-04-29T06:59:50Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-05-17; A search for pair production of second-generation scalar leptoquarks in the final state with two muons and two jets is performed using proton-proton collision data at √s=7TeV collected by the CMS detector at the LHC. The data sample used corresponds to an integrated luminosity of 34pb-1. The number of o...