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CMS Physics Analysis Summaries

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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;

Detaljnije - Slični zapisi
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;

Detaljnije - Slični zapisi
2015-04-09
16:37
Study of double parton scattering in photon + 3 jets final state in proton-proton collisions at 7TeV /CMS Collaboration
Distributions sensitive to double parton scattering are investigated in the photon + 3 jets final state in proton-proton collisions at a center-of-mass energy of 7 TeV. The data were collected by the CMS experiment at the LHC with an integrated luminosity of 36 pb$^\mathrm{-1}$~in 2010. [...]
CMS-PAS-FSQ-12-017.- Geneva : CERN, 2015 Figure_001-a: PDF; Figure_001-b: 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_003-e: PDF; Figure_003-f: PDF; Figure_003-g: PDF; Figure_003-h: PDF; Figure_003-i: PDF; Figure_004: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_005-c: PDF; Figure_005-d: PDF; Figure_006-a: PDF; Figure_006-b: PDF; Figure_006-c: PDF; Figure_007-a: PDF; Figure_007-b: PDF; Figure_007-c: PDF; Figure_007-d: PDF; Figure_007-e: PDF; Figure_007-f: PDF; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi
2015-04-07
16:50
Search for invisible decays of Higgs bosons in the vector boson fusion production mode /CMS Collaboration
A search for invisible decays of Higgs bosons in the vector boson fusion production mode is carried out using data recorded by the CMS detector at the LHC in 2012 at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 19.2 fb$^{-1}$. Limits are set on the production cross section times invisible branching fraction, as a function of the Higgs boson mass. [...]
CMS-PAS-HIG-14-038.- 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_003-a: PDF; Figure_003-b: PDF; Figure_003-c: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_004-c: 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_007-a: PDF; Figure_007-b: PDF; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi
2015-04-01
16:53
Search for long-lived particles that decay into final states containing two muons, reconstructed using only the CMS muon chambers /CMS Collaboration
A search is performed for long-lived neutral particles that decay into final states that include a pair of muons. These are reconstructed using only the CMS muon chambers. The experimental signature is a distinctive topology consisting of a pair of muons originating from a displaced secondary vertex. [...]
CMS-PAS-EXO-14-012.- Geneva : CERN, 2015 Figure_001: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_005-c: PDF; Figure_005-d: PDF; Figure_006: PDF; Figure_007-a: PDF; Figure_007-b: PDF; Figure_007-c: PDF; Figure_007-d: PDF; Figure_008: PDF; Figure_009-a: PDF; Figure_009-b: PDF; Figure_009-c: PDF; Figure_009-d: PDF; Figure_010: PDF; Figure_011-a: PDF; Figure_011-b: PDF; Figure_011-c: PDF; Figure_011-d: PDF; Figure_012: PDF; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi
2015-03-24
19:41
Search for massive WH resonances decaying to $\ell \nu {\rm b \bar{b}}$ final state in the boosted regime at $\sqrt{s}=8$\,TeV /CMS Collaboration
A search for a massive resonance decaying into a W boson and a Higgs boson in the $\ell \nu \rm{b \bar{b}}$ final state is presented. Results are based on data corresponding to an integrated luminosity of 19.7 fb$^{-1}$ of proton-proton collisions at $\sqrt{s}=8$\,TeV and collected with the CMS detector at the CERN LHC. For a high-mass ($\gtrsim$ 1~TeV) resonance, the two bottom quarks coming from the Higgs boson decay give rise to the presence of one single jet, which can be tagged through a study of its substructure and flavor. Exclusion limits at 95\% confidence level are set on the cross section of a narrow resonance decaying to WH as a function of its mass. In the context of the Little Higgs model, we set a lower limit on the W' mass of 1.4~TeV. In a model of a Heavy Vector Triplet that mimics the properties of the Composite Higgs model, we set a lower limit on the W' mass of 1.5~TeV..
CMS-PAS-EXO-14-010.- Geneva : CERN, 2015 Figure_001: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_005: PDF; Figure_006-a: PDF; Figure_006-b: PDF; Figure_007: PDF; Figure_008: PDF; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi
2015-03-24
15:02
Search for dark matter direct production using razor variables in events with two or more jets in pp collisions at 8 TeV /CMS Collaboration
Directly produced dark matter is searched for in proton-proton collision data, collected by the CMS experiment at a center-of-mass energy $\sqrt{s}\,=\,8$ TeV. The dataset corresponds to an integrated luminosity of 18.8~fb$^{-1}$. [...]
CMS-PAS-EXO-14-004.- Geneva : CERN, 2015 Figure_001-a: PDF; Figure_001-b: PDF; Figure_001-c: PDF; Figure_001-d: PDF; Figure_002: 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_005-a: PDF; Figure_005-b: PDF; Figure_006-a: PDF; Figure_006-b: PDF; Figure_007-a: PDF; Figure_007-b: PDF; Figure_008-a: PDF; Figure_008-b: PDF; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi
2015-03-23
10:33
Search for electroweak SUSY with VBF tagging /CMS Collaboration
The first search for supersymmetry with the vector boson fusion (VBF) topology is presented. The VBF topology offers a promising avenue to study the electroweak sector of supersymmetry. [...]
CMS-PAS-SUS-14-005.- 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; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi
2015-03-20
17:47
Search for a light NMSSM Higgs boson produced in supersymmetric cascades and decaying into a b-quark pair /CMS Collaboration
A search for a light neutral Higgs boson decaying to a pair of b-quarks, and produced together with at least two very energetic jets and large missing energy, is presented. Such Higgs bosons are conceivable in the Next-to-Minimal Supersymmetric Model (NMSSM), with the Higgs sector characterized by two complex Higgs doublets and an additional Higgs singlet field. [...]
CMS-PAS-HIG-14-030.- Geneva : CERN, 2015 Figure_001: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003: PDF; Figure_004: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_005-c: PDF; Figure_005-d: PDF; Figure_006: PDF; Figure_007: PDF; Figure_008: PDF; Figure_009: PDF; Figure_010: PDF; Figure_011: PDF; Figure_012: PDF; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi
2015-03-18
12:39
Search for Lepton Flavour Violating Decays of Heavy Resonances and Quantum Black Holes to electron/muon Pairs in pp Collisions at a centre of mass energy of 8 TeV /CMS Collaboration
A search for heavy states decaying into the e$\mu$ final state has been performed using an integrated luminosity of $19.7~\text{fb}^{-1}$ of $8\,\text{TeV}$ proton-proton collision data recorded with the CMS detector at the LHC. No evidence for physics beyond the Standard Model is observed in the invariant mass spectrum of selected e$\mu$ pairs. [...]
CMS-PAS-EXO-13-002.- Geneva : CERN, 2015 Figure_001-a: PDF; Figure_001-b: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003: PDF; Figure_004: PDF; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi