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CMS Physics Analysis Summaries

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2016-05-24
15:37
Measurement of the charged particle nuclear modification factor in PbPb collisions at $\sqrt{s_{\rm NN}}=5.02~\mathrm{TeV}$ /CMS Collaboration
The nuclear modification factor, $R_{\rm AA}$, of charged particles produced in the $|\eta|<1$ pseudorapidity region is measured at $\sqrt{s_{\rm NN}}=5.02~\mathrm{TeV}$ using $404~\mu\mathrm{b}^{-1}$ of PbPb and $25.8~\mathrm{pb}^{-1}$ of pp data collected by the CMS experiment at the end of 2015. The $R_{\rm AA}$ is presented in several bins of collision centrality, over the transverse momentum range of $0.7-400~\mathrm{GeV}$. [...]
CMS-PAS-HIN-15-015.- Geneva : CERN, 2016 Figure_001-a: PDF; Figure_001-b: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_002-c: PDF; Figure_002-d: PDF; Figure_002-e: PDF; Figure_002-f: 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_004-a: PDF; Figure_004-b: PDF; Figure_005: PDF; Figure_006: PDF; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi
2016-05-23
22:16
Combination of cross-section measurements of associated production of a single top quark and a W boson at $\sqrt{s} = 8~\mathrm{TeV}$ with the ATLAS and CMS experiments /CMS Collaboration
A combination of cross-section measurements for the associated production of a top quark and a W boson in proton-proton collisions at $\sqrt{s}=8~\mathrm{TeV}$ by the ATLAS and CMS experiments is presented. The two measurements are based on integrated luminosities of $20.3~\mathrm{fb}^{-1}$ and $12.2~\mathrm{fb}^{-1}$, respectively. [...]
CMS-PAS-TOP-15-019.- Geneva : CERN, 2016 Figure_001: PDF; Figure_002: PDF; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi
2016-05-23
08:45
Observation of particle-species dependence and collectivity in azimuthal correlations of pp collisions at the LHC /CMS Collaboration
Measurements of two- and multi-particle angular correlations in pp collisions at $\sqrt{s} = 5$, $7$, and $13~\mathrm{TeV}$ are presented as a function of charged-particle multiplicity. The data, corresponding to an integrated luminosity of $1.0~\mathrm{pb}^{-1}$ ($5~\mathrm{TeV}$), $6.2~\mathrm{pb}^{-1}$ ($7~\mathrm{TeV}$), and $0.7~\mathrm{pb}^{-1}$ ($13~\mathrm{TeV}$), were collected using the CMS detector at the LHC. [...]
CMS-PAS-HIN-16-010.- Geneva : CERN, 2016 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; Figure_008: PDF; Figure_009-a: PDF; Figure_009-b: PDF; Figure_010: PDF; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi
2016-05-19
22:32
Observation of $\Upsilon(1S)$ pair production at CMS /CMS Collaboration
The simultaneous production of two $\Upsilon(1S)$ mesons in proton-proton collisions is observed by CMS at $\sqrt s$ = 8 TeV at LHC in a data sample corresponding to an integrated luminosity of 20.7 fb$^{-1}$. The statistical significance is well in excess of 5 standard deviations. [...]
CMS-PAS-BPH-14-008.- Geneva : CERN, 2016 Figure_001: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi
2016-05-19
22:31
Combination of diboson resonance searches at 8 and 13 TeV /CMS Collaboration
The statistical combination of searches for massive resonances decaying to pairs of W, Z, and Higgs bosons based on pp collision data collected by the CMS experiment at the CERN LHC is presented. The data are taken at a centre-of-mass energy of 8 and 13 TeV and correspond to an integrated luminosity of 19.7fb$^{-1}$ and 2.6$^{-1}$ respectively. The results are interpreted in the context of a heavy vector triplet model that mimics the properties of composite Higgs models predicting a W' and a Z' decaying to WZ, WH, WW, and ZH and a model with a "bulk" graviton that decays into WW and ZZ. Combined cross section limits as a function of resonance mass are obtained. The combined significance of potential resonances of 1.8--2 TeV are evaluated in each signal hypothesis..
CMS-PAS-B2G-16-007.- Geneva : CERN, 2016 Figure_001-a: PDF; Figure_001-b: PDF; Figure_001-c: PDF; Figure_002: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_003-c: PDF; Figure_004: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_005-c: PDF; Figure_006: PDF; Figure_007: PDF; Figure_008-a: PDF; Figure_008-b: PDF; Figure_009: PDF; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi
2016-05-17
17:39
Determination of the normalised invariant mass distribution of $\mathrm{t\bar{t}}+$jet and extraction of the top quark mass /CMS Collaboration
A measurement of the top quark mass from top quark pair ($\mathrm{t\bar{t}}$) events produced in association with additional hard jets is performed in pp collisions at $\sqrt{s}=8$ TeV with the CMS detector using data recorded in 2012, corresponding to an integrated luminosity of 19.7 fb$^{-1}$. The mass is extracted from the normalised invariant mass distribution of the $\mathrm{t\bar{t}}\text{+jet}$ system at reconstruction level as well as from the related normalised differential cross section. [...]
CMS-PAS-TOP-13-006.- Geneva : CERN, 2016 Figure_001-a: PDF; Figure_001-b: PDF; Figure_001-c: PDF; Figure_002: 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; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi
2016-05-07
11:10
Measurement of the differential cross section for $t$-channel single-top-quark production at $\sqrt{s}=13~\mathrm{TeV}$ /CMS Collaboration
A measurement of differential cross sections for $t$-channel single-top-quark production in proton-proton collisions at a centre-of-mass energy of 13 TeV is presented. The cross sections are measured as functions of the transverse momentum and the absolute value of the rapidity of the top quark. [...]
CMS-PAS-TOP-16-004.- Geneva : CERN, 2016 Figure_001-a: PDF; Figure_001-b: 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_004-c: PDF; Figure_004-d: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi
2016-04-27
12:35
Search for high-mass resonances and quantum black holes in the $e\mu$ final state in proton-proton collisions at $\sqrt{s}=13~\mathrm{TeV}$ /CMS Collaboration
A search for heavy resonances decaying into $e\mu$ final states has been performed using an integrated luminosity of $2.7~\mathrm{fb}^{-1}$ of $13~\mathrm{TeV}$ 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-16-001.- Geneva : CERN, 2016 Figure_001-a: PDF; Figure_001-b: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_003: PDF; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi
2016-04-26
11:19
Measurement of the ZZ production cross section and $\mathrm{Z} \to \ell\ell\ell'\ell'$ branching fraction in pp collisions at $\sqrt{s}=13~\mathrm{TeV}$ /CMS Collaboration
Four-lepton production in proton-proton collisions, ${\mathrm{pp}} \rightarrow {\mathrm{Z}} / \gamma^* {\mathrm{Z}}/ \gamma^* \rightarrow \ell\ell\ell'\ell'$, where ($\ell, \ell' = $ e or $\mu$), is studied at a center-of-mass energy of $13~\mathrm{TeV}$ with the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of $2.6~\mathrm{fb}^{-1}$. [...]
CMS-PAS-SMP-16-001.- Geneva : CERN, 2016 Figure_001-a: PNG; Figure_001-b: PNG; Figure_002-a: PNG; Figure_002-b: PNG; Figure_003-a: PNG; Figure_003-b: PNG; Figure_004-a: PNG; Figure_004-b: PNG; Figure_005: PDF; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi
2016-04-22
17:10
Search for dark matter production in association with jets, or hadronically decaying W or Z boson at $\sqrt{s} = 13$ TeV /CMS Collaboration
A search for new physics is performed using events with large missing transverse momentum and one or more jets with high transverse momenta in a data sample of proton-proton interactions at the centre-of-mass energy of 13 TeV collected with the CMS detector at the LHC in 2015. This includes a dedicated search for new physics in events in which a hadronically decaying W or Z boson is produced in association with large missing transverse energy. The data correspond to an integrated luminosity of 2.3 fb$^{-1}$. [...]
CMS-PAS-EXO-16-013.- Geneva : CERN, 2016 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_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: PNG; Figure_008-b: PNG; Figure_009-a: PDF; Figure_009-b: PDF; Fulltext in PDF: PDF;

Detaljnije - Slični zapisi