CMS Physics Analysis Summaries

2015-05-29
18:33
 Search for Lepton Flavor Violation in Z decays in pp collisions at sqrt(s)=8 TeV /CMS Collaboration A search for lepton flavor violation in Z boson decays to one electron and one muon is performed. The data sample of proton-proton collisions at $\sqrt{s}=8$ TeV collected by the CMS detector corresponds to an integrated luminosity of $19.7~\text{fb}^{-1}$. [...] CMS-PAS-EXO-13-005.- Geneva : CERN, 2015 Figure_001: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Fulltext in PDF: PDF;

2015-05-29
18:29
 Search for displaced photons using conversions at 8 TeV /CMS Collaboration A search is performed for long-lived neutral particles decaying to photons and invisible particles. An example of a physics process leading to such a signature is the decay of the lightest neutralino with nonzero lifetime into a gravitino and a photon, as predicted by gauge-mediated supersymmetric models. The search is based on events containing at least two photons of which at least one has converted to an $e^{+}e^{-}$ pair, at least two jets, and missing transverse energy. The transverse impact parameter can be reconstructed using photons converting into $e^{+}e^{-}$ pairs. We consider scenarios in which the neutralino has a mean lifetime between $c\tau =$ 0.4 and 100 cm. The analysis was performed on a data sample collected by the CMS experiment at the LHC in 2012 at center-of-mass energy $\sqrt{s}=8$ TeV and corresponds to an integrated luminosity of $19.7$ fb$^{-1}$ of proton--proton collisions.. CMS-PAS-EXO-14-017.- Geneva : CERN, 2015 Figure_001-a: PDF; Figure_001-b: PDF; Figure_002: PDF; Figure_003: PDF; Figure_004: PDF; Figure_005: PDF; Figure_006: PDF; Figure_007: PDF; Fulltext in PDF: PDF;

2015-05-28
07:54
 Measurement of dijet azimuthal decorrelations in pp collisions at sqrt(s) = 8 TeV /CMS Collaboration A measurement of dijet azimuthal decorrelations between the two jets with the largest transverse momenta is presented for seven regions of leading jet transverse momenta up to 2.2 TeV. The analysis is based on the full data set of proton-proton collisions acquired by the CMS experiment at the LHC during 2012 at a centre-of-mass energy of 8 TeV. [...] CMS-PAS-SMP-14-015.- Geneva : CERN, 2015 Figure_001-a: PDF; Figure_001-b: PDF; Figure_002: PDF; Figure_003: PDF; Figure_004: PDF; Figure_005: PDF; Fulltext in PDF: PDF;

2015-05-22
12:13
 Search for High-Mass Diphoton Resonances in pp Collisions at sqrt(s)=8 TeV with the CMS Detector /CMS Collaboration A search for high-mass diphoton resonances is performed in proton-proton collisions at $\sqrt{s}=8$~TeV, with data corresponding to an integrated luminosity of 19.5~fb$^{-1}$, collected by the CMS detector at the CERN Large Hadron Collider. Such a diphoton resonance could be a signature of an excited state of the graviton in the Randall-Sundrum scenario with a warped extra dimension of space. [...] CMS-PAS-EXO-12-045.- Geneva : CERN, 2015 Figure_001-a: PNG; Figure_001-b: PNG; Figure_001-c: PNG; Figure_002-a: PNG; Figure_002-b: PNG; Figure_002-c: PNG; Figure_003: PNG; Fulltext in PDF: PDF;

2015-05-21
20:53
 Search for pair-produced vector-like top quark partners decaying to bW in the fully hadronic channel using jet substructure at 8 TeV /CMS Collaboration We present a search for pair-produced vector-like top quark partners in 19.7~fb$^{-1}$ of $\rm pp$ collisions at $\sqrt{s} = 8$ TeV collected with the CMS detector at the LHC in 2012. The search is optimized for the decay mode $\rm T \to bW$ in the fully hadronic final state. [...] CMS-PAS-B2G-12-013.- Geneva : CERN, 1900 Figure_001: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_002-c: PDF; Figure_002-d: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_005-c: PDF; Figure_006-a: PDF; Figure_006-b: PDF; Fulltext in PDF: PDF;

2015-05-05
17:29
 Search for H/A decaying into Z+A/H, with Z to ll and A/H to fermion pair /CMS Collaboration A search is performed for a new heavy resonance decaying to a Z boson and a light resonance, where the light resonance decays to either a pair of bottom quarks or a pair of tau leptons and the Z boson decays to two electrons or two muons. The search exploits a data sample collected during 2012 by the CMS experiment at the center-of-mass energy of $\sqrt{s}=$ 8 TeV and corresponding to an integrated luminosity of $\cal L$ = 19.8 $\mathrm{fb^{-1}}$. [...] CMS-PAS-HIG-15-001.- Geneva : CERN, 2015 Figure_001-a: PDF; Figure_001-b: PDF; Figure_002: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_004: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_006-a: PDF; Figure_006-b: PDF; Figure_007: PDF; Figure_008-a: PDF; Figure_008-b: PDF; Figure_008-c: PDF; Figure_008-d: PDF; Figure_008-e: PDF; Figure_008-f: PDF; Figure_008-g: PDF; Figure_008-h: PDF; Figure_009-a: PDF; Figure_009-b: PDF; Figure_009-c: PDF; Figure_009-d: PDF; Figure_010-a: PDF; Figure_010-b: PDF; Figure_010-c: PDF; Figure_010-d: PDF; Figure_011-a: PDF; Figure_011-b: PDF; Fulltext in PDF: PDF;

2015-05-01
18:38
 Measurement of the muon charge asymmetry in inclusive pp to WX production at sqrt(s)=8 TeV /CMS Collaboration Measurements of the muon charge asymmetry in inclusive $\mathrm{pp} \rightarrow \mathrm{W}^{\pm}+\mathrm{X} \rightarrow \mu^{\pm}\nu+\mathrm{X}$ production at $\sqrt{s}=8$ TeV are presented. The data sample corresponds to an integrated luminosity of 18.8 fb$^{-1}$ recorded with the CMS detector at the LHC. [...] CMS-PAS-SMP-14-022.- Geneva : CERN, 2015 Figure_001-a: PDF; Figure_001-b: PDF; Figure_001-c: PDF; Figure_001-d: PDF; Figure_001-e: PDF; Figure_001-f: PDF; Figure_002: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Fulltext in PDF: PDF;

2015-04-28
19:22
 Studies of 2 b-jet + 2 jet production in proton-proton collisions at 7 TeV /CMS Collaboration Measurements are presented of inclusive differential two b- and two-jet production cross sections as a function of the transverse momentum $p_\text{T}$, pseudorapidity $\eta$, as well as of correlations in azimuthal angle $\phi$, pseudorapidity $\eta$ and $p_\text{T}$ balance among the jets. The data sample was collected from proton-proton collisions at a centre-of-mass energy of 7~TeV with the CMS detector at the LHC, corresponding to an integrated luminosity of 3.03 pb$^{-1}$. [...] CMS-PAS-FSQ-13-010.- Geneva : CERN, 2015 Figure_001-a: PDF; Figure_001-b: PDF; Figure_001-c: PDF; Figure_001-d: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_002-c: PDF; Figure_002-d: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_006-a: PDF; Figure_006-b: PDF; Figure_006-c: PDF; Figure_006-d: PDF; Figure_006-e: PDF; Figure_006-f: PDF; Figure_007-a: PDF; Figure_007-b: PDF; Figure_007-c: PDF; Fulltext in PDF: PDF;

2015-04-24
05:03
 Forward-backward asymmetry of Drell-Yan lepton pairs in pp collisions at 8 TeV /CMS Collaboration The measurement of the forward-backward asymmetry A$_{\rm FB}$ of oppositely charged lepton pairs produced via an intermediate $Z/\gamma^*$ at $\sqrt{s} = 8$~TeV is presented. The data sample corresponds to an integrated luminosity of 19.7~fb$^{-1}$. [...] CMS-PAS-SMP-14-004.- Geneva : CERN, 2015 Figure_001: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_003-c: PDF; Figure_003-d: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_004-c: PDF; Figure_004-d: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_005-c: PDF; Figure_005-d: PDF; Figure_006: PDF; Fulltext in PDF: PDF;

2015-04-16
17:34
 Search for supersymmetry in events with soft leptons, low jet multiplicity, and missing transverse momentum in proton-proton collisions at sqrt(s) = 8 TeV /CMS Collaboration A search for supersymmetry with a compressed mass spectrum is presented. Events are selected using the presence of a high-momentum jet from initial state radiation, high missing energy, and a low-momentum muon, either as the only lepton in the event or accompanied by an electron or muon of the opposite charge. In particular, a scenario of top squark pair production is investigated, where the mass difference to the lightest supersymmetric particle (LSP) is smaller than the mass of the W~boson. In this case the top squarks could undergo four-body decays to $\mathrm{b} \ell \nu + \mathrm{LSP}$. The search is performed in a sample of proton-proton collisions recorded with the CMS detector at a centre-of-mass energy of 8\,TeV and corresponding to an integrated luminosity of 19.7\,$\mathrm{fb}^{-1}$. The results are consistent with the expectation from standard model processes and limits are set on the production cross section in the plane of the top squark vs. LSP masses. Assuming a 100\% branching ratio of the four-body decay top squark masses below 316\,GeV are excluded at 95\%~confidence level for a mass difference to the LSP of about 25\,GeV. Results are also interpreted under the assumption of chargino-neutralino production, with subsequent decays via sleptons or sneutrinos.. CMS-PAS-SUS-14-021.- Geneva : CERN, 2015 Figure_001-a: PNG; Figure_001-b: PNG; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_004: PDF; Fulltext in PDF: PDF;