Results are presented from a search for third-generation leptoquarks and scalar bottom quarks in ... more Results are presented from a search for third-generation leptoquarks and scalar bottom quarks in a sample of proton-proton collisions at sqrt {s}= 7TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.7 fb-1. A scenario where the new particles are pair produced and each decays to ab quark plus a tau neutrino or neutralino is considered. The number of observed events is found to be in agreement with the standard model prediction. Upper limits are set at 95% confidence level on the ...
A search is presented for physics beyond the standard model (BSM) in final states with a pair of ... more A search is presented for physics beyond the standard model (BSM) in final states with a pair of opposite-sign isolated leptons accompanied by jets and missing transverse energy. The search uses LHC data recorded at a center-of-mass energy s= 7 TeV with the CMS detector, corresponding to an integrated luminosity of approximately 5 fb− 1. Two complementary search strategies are employed. The first probes models with a specific dilepton production mechanism that leads to a characteristic kinematic edge in the ...
ABSTRACT A search for the standard model Higgs boson in the H -> ZZ -&... more ABSTRACT A search for the standard model Higgs boson in the H -> ZZ -> 2l2v decay channel, where l = e or mu, in pp collisions at a center-of-mass energy of 7 TeV is presented. The data were collected at the LHC, with the CMS detector, and correspond to an integrated luminosity of 4.6 fb(-1). No significant excess is observed above the background expectation, and upper limits are set on the Higgs boson production cross section. The presence of the standard model Higgs boson with a mass in the 270-440GeV range is excluded at 95% confidence level.
... In supersymmetry (SUSY) this quantity is R parity, and its conservation requires all SUSY par... more ... In supersymmetry (SUSY) this quantity is R parity, and its conservation requires all SUSY particles to be produced in pairs and the lightest SUSY particle (LSP) to be stable. Coloured SUSY particles can be pair-produced copiously at the Large Hadron Collider (LHC). ...
Abstract A search has been performed for the experimental signature of an isolated photon with hi... more Abstract A search has been performed for the experimental signature of an isolated photon with high transverse momentum, at least one jet identified as originating from a bottom quark, and high missing transverse momentum. Such a final state may originate from supersymmetric models with gauge-mediated supersymmetry breaking in events in which one of a pair of higgsino-like neutralinos decays into a photon and a gravitino while the other decays into a Higgs boson and a gravitino. The search is performed using the full ...
Dijet production in PbPb collisions at a nucleon–nucleon center-of-mass energy of 2.76 TeV is stu... more Dijet production in PbPb collisions at a nucleon–nucleon center-of-mass energy of 2.76 TeV is studied with the CMS detector at the LHC. A data sample corresponding to an integrated luminosity of 150 μb− 1 is analyzed. Jets are reconstructed using combined information from tracking and calorimetry, using the anti-kT algorithm with R= 0.3. The dijet momentum balance and angular correlations are studied as a function of collision centrality and leading jet transverse momentum. For the most peripheral PbPb collisions, good agreement of the ...
Results are presented from a search for third-generation leptoquarks and scalar bottom quarks in ... more Results are presented from a search for third-generation leptoquarks and scalar bottom quarks in a sample of proton-proton collisions at sqrt {s}= 7TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.7 fb-1. A scenario where the new particles are pair produced and each decays to ab quark plus a tau neutrino or neutralino is considered. The number of observed events is found to be in agreement with the standard model prediction. Upper limits are set at 95% confidence level on the ...
A search is presented for physics beyond the standard model (BSM) in final states with a pair of ... more A search is presented for physics beyond the standard model (BSM) in final states with a pair of opposite-sign isolated leptons accompanied by jets and missing transverse energy. The search uses LHC data recorded at a center-of-mass energy s= 7 TeV with the CMS detector, corresponding to an integrated luminosity of approximately 5 fb− 1. Two complementary search strategies are employed. The first probes models with a specific dilepton production mechanism that leads to a characteristic kinematic edge in the ...
ABSTRACT A search for the standard model Higgs boson in the H -> ZZ -&... more ABSTRACT A search for the standard model Higgs boson in the H -> ZZ -> 2l2v decay channel, where l = e or mu, in pp collisions at a center-of-mass energy of 7 TeV is presented. The data were collected at the LHC, with the CMS detector, and correspond to an integrated luminosity of 4.6 fb(-1). No significant excess is observed above the background expectation, and upper limits are set on the Higgs boson production cross section. The presence of the standard model Higgs boson with a mass in the 270-440GeV range is excluded at 95% confidence level.
... In supersymmetry (SUSY) this quantity is R parity, and its conservation requires all SUSY par... more ... In supersymmetry (SUSY) this quantity is R parity, and its conservation requires all SUSY particles to be produced in pairs and the lightest SUSY particle (LSP) to be stable. Coloured SUSY particles can be pair-produced copiously at the Large Hadron Collider (LHC). ...
Abstract A search has been performed for the experimental signature of an isolated photon with hi... more Abstract A search has been performed for the experimental signature of an isolated photon with high transverse momentum, at least one jet identified as originating from a bottom quark, and high missing transverse momentum. Such a final state may originate from supersymmetric models with gauge-mediated supersymmetry breaking in events in which one of a pair of higgsino-like neutralinos decays into a photon and a gravitino while the other decays into a Higgs boson and a gravitino. The search is performed using the full ...
Dijet production in PbPb collisions at a nucleon–nucleon center-of-mass energy of 2.76 TeV is stu... more Dijet production in PbPb collisions at a nucleon–nucleon center-of-mass energy of 2.76 TeV is studied with the CMS detector at the LHC. A data sample corresponding to an integrated luminosity of 150 μb− 1 is analyzed. Jets are reconstructed using combined information from tracking and calorimetry, using the anti-kT algorithm with R= 0.3. The dijet momentum balance and angular correlations are studied as a function of collision centrality and leading jet transverse momentum. For the most peripheral PbPb collisions, good agreement of the ...
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Papers by chris fabjan