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CMS Physics Analysis Summaries

Darreres entrades:
2014-04-03
19:20
Search for direct production of bottom squark pairs /CMS Collaboration
This report presents a search for direct production of bottom squark pairs in proton-proton collision events at $\sqrt{s}=8$~TeV collected by the CMS experiment at the LHC in 2012. The data used correspond to an integrated luminosity of 19.4~fb$^{-1}$. [...]
CMS-PAS-SUS-13-018.- Geneva : CERN, 2014 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_004-c: PDF; Figure_004-d: PDF; Figure_005-a: PDF; Figure_005-b: PDF; Figure_006: PDF; Fulltext in PDF: PDF;

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2014-04-03
16:59
Phenomenological MSSM interpretation of the CMS 7 and 8 TeV results /CMS Collaboration
We interpret within the phenomenological MSSM (pMSSM) results from searches for new physics performed by CMS in $pp$ data sets collected at 7~TeV and 8~TeV, corresponding to integrated luminosities of 5~fb$^{-1}$ and 19.5~fb$^{-1}$, respectively. The pMSSM is a 19-parameter realization of the MSSM, defined at the SUSY scale, that captures most of the features of the general R-parity conserving weak-scale MSSM. It allows us to draw conclusions that are more generic than , and complimentary to, those derived in more constrained models, including simplified models and those that impose particular SUSY breaking schemes, such as the CMSSM. We perform a global Bayesian analysis on a data set, which in addition to CMS search results, includes data from pre-CMS and indirect measurements. We study posterior probability densities of model parameters, masses and observables and study implications for the MSSM Higgs sector and dark matter searches. Our study provides a coherent global picture of how the current CMS searches constrain supersymmetry in general..
CMS-PAS-SUS-13-020.- Geneva : CERN, 2014 Figure_001-a: PDF; Figure_001-b: PDF; Figure_001-c: PDF; Figure_001-d: PDF; Figure_001-e: 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_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-a: PDF; Figure_006-b: PDF; Figure_007-a: PDF; Figure_007-b: PDF; Figure_007-c: PDF; Figure_007-d: 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_008-i: PDF; Figure_008-j: PDF; Figure_008-k: PDF; Figure_008-l: PDF; Figure_008-m: PDF; Figure_008-n: PDF; Figure_008-o: PDF; Figure_008-p: PDF; Figure_008-q: PDF; Figure_008-r: PDF; Figure_008-s: PDF; Figure_008-t: PDF; Figure_009-a: PDF; Figure_009-b: PDF; Figure_009-c: PDF; Figure_009-d: PDF; Figure_009-e: PDF; Figure_009-f: PDF; Figure_009-g: PDF; Figure_009-h: PDF; Figure_009-i: PDF; Figure_009-j: PDF; Figure_009-k: PDF; Figure_009-l: PDF; Figure_009-m: PDF; Figure_009-n: PDF; Figure_009-o: PDF; Figure_009-p: PDF; Figure_009-q: PDF; Figure_009-r: PDF; Figure_009-s: PDF; Figure_009-t: PDF; Figure_010-a: PDF; Figure_010-b: PDF; Figure_010-c: PDF; Figure_011-a: PDF; Figure_011-b: PDF; Figure_011-c: PDF; Figure_011-d: PDF; Figure_011-e: PDF; Figure_011-f: PDF; Figure_012-a: PDF; Figure_012-b: PDF; Figure_012-c: PDF; Figure_013-a: PDF; Figure_013-b: PDF; Figure_013-c: PDF; Figure_014-a: PDF; Figure_014-b: PDF; Figure_014-c: PDF; Figure_014-d: PDF; Figure_014-e: PDF; Figure_014-f: PDF; Figure_014-g: PDF; Figure_014-h: PDF; Figure_014-i: PDF; Fulltext in PDF: PDF;

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2014-03-26
15:45
Measurement of the top-quark mass in t t-bar events with lepton+jets final states in pp collisions at sqrt(s)=8 TeV /CMS Collaboration
The mass of the top quark is measured using a sample of $\rm{t}\bar{\rm t}$ candidate events with one electron or muon and at least four jets in the final state, collected by CMS in pp collisions at $\sqrt{s}=8$~TeV at the LHC. The candidate events are selected from data corresponding to an integrated luminosity of 19.7~fb$^{-1}$. For each event the mass is reconstructed from a kinematic fit of the decay products to a $\rm{t}\bar{\rm t}$ hypothesis. The top-quark mass is determined simultaneously with an overall jet energy scale factor (JSF), constrained by the known mass of the W boson in $\rm{q}\bar{\rm q}$ decays. Studies of their kinematic dependence are performed to confirm that the data are well modeled by the simulation. The top-quark mass is measured to be $172.04\pm 0.19\,\text{(stat.+JSF)} \pm 0.75\,\text{(syst.)}$~GeV. The combination with previously published measurements by CMS yields a mass of $172.22\pm0.73$~GeV..
CMS-PAS-TOP-14-001.- Geneva : CERN, 2014 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_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-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_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; Figure_011-c: PDF; Figure_011-d: PDF; Figure_012-a: PDF; Figure_012-b: PDF; Figure_012-c: PDF; Figure_012-d: PDF; Figure_013-a: PDF; Figure_013-b: PDF; Figure_013-c: PDF; Figure_013-d: PDF; Figure_014-a: PDF; Figure_014-b: PDF; Figure_014-c: PDF; Figure_014-d: PDF; Figure_015-a: PDF; Figure_015-b: PDF; Figure_015-c: PDF; Figure_015-d: PDF; Figure_016-a: PDF; Figure_016-b: PDF; Figure_016-c: PDF; Figure_016-d: PDF; Figure_017-a: PDF; Figure_017-b: PDF; Figure_017-c: PDF; Figure_017-d: PDF; Figure_018-a: PDF; Figure_018-b: PDF; Figure_018-c: PDF; Figure_018-d: PDF; Fulltext in PDF: PDF;

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2014-03-24
10:44
Combination of ATLAS and CMS ttbar charge asymmetry measurements using LHC proton-proton collisions at 7 TeV /CMS Collaboration
A combination of measurements of the charge asymmetry in $\mathrm{t\bar{t}}$ events performed by the ATLAS and CMS collaborations is presented. The analyzed datasets of LHC proton collisions at a centre-of-mass energy of $7\,\mathrm{TeV}$ correspond to an integrated luminosity of $4.7\,\mathrm{fb}^{-1}$ for ATLAS and $5.0\,\mathrm{fb}^{-1}$ for CMS. [...]
CMS-PAS-TOP-14-006.- Geneva : CERN, 2014 Figure_001: PDF; Fulltext in PDF: PDF;

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2014-03-24
10:38
Search for a Higgs boson decaying into gamma*gamma to mu+mu-gamma with dilepton mass below 20 GeV in pp collisions at sqrt-s = 8 TeV /CMS Collaboration
A search for a Higgs boson decaying into two photons, one of which has an internal conversion into a muon pair, is described. The analysis is performed using proton-proton collision data recorded by the CMS detector at the LHC. The events, collected at a center-of-mass energy of 8\,TeV, correspond to an integrated luminosity of 19.7\,fb$^{-1}$. Events are selected which have an opposite-sign muon pair and a high transverse momentum photon. No excess above background has been found in the 120--150\,GeV mass range and the first limits have been derived for the Higgs boson production cross section times the ${\rm H}\to\gamma^*\gamma\to\mu\mu\gamma$ branching fraction for dimuon invariant mass less than 20\,GeV. The observed limit for a Higgs boson of mass 125\,GeV is about ten times the standard model cross section times branching fraction..
CMS-PAS-HIG-14-003.- Geneva : CERN, 2014 Figure_001: PNG; Figure_002-a: PDF; Figure_002-b: PDF; Figure_002-c: PDF; Figure_003: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_004-c: PDF; Figure_005: PDF; Fulltext in PDF: PDF;

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2014-03-22
15:16
Measurement of the double differential Drell-Yan cross section at low and high masses of the di-muon system at sqrts = 7 TeV /CMS Collaboration
Measurements of the differential Drell-Yan and associated jet cross section as a function of the Drell-Yan pair mass are presented in the di-muon channel. The data set is based on an integrated luminosity of 4.9 fb$^{-1}$ of proton-proton collision data recorded with the CMS detector at the LHC at $\sqrt{s} =7$ TeV. [...]
CMS-PAS-FSQ-13-003.- Geneva : CERN, 2014 Figure_001-a: PDF; Figure_001-b: PDF; Figure_001-c: PDF; Figure_001-d: PDF; Figure_001-e: PDF; Figure_002-a: PDF; Figure_002-b: PDF; Figure_002-c: PDF; Figure_002-d: PDF; Figure_002-e: PDF; Figure_003-a: PDF; Figure_003-b: PDF; Figure_003-c: PDF; Figure_003-d: PDF; Figure_003-e: PDF; Figure_004-a: PDF; Figure_004-b: PDF; Figure_004-c: PDF; Figure_004-d: PDF; Figure_004-e: PDF; Figure_004-f: PDF; Figure_005: PDF; Fulltext in PDF: PDF;

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2014-03-20
23:45
Constraints on the Higgs boson width from off-shell production and decay to ZZ to llll and llvv /CMS Collaboration
We constrain the total Higgs boson width, $\Gamma_{\mathrm{H}}$, using off-shell production and decay to four leptons, $4\ell$, or two leptons plus two neutrinos, $2\ell 2\nu$, with $\ell = \mathrm{e},\mu$. The analysis is based on the data collected in 2012 by the CMS experiment at the LHC, corresponding to an integrated luminosity ${\cal L} = 19.7 \mathrm{fb^{-1}}$ at a center-of-mass energy $\surd s = 8 \, {\rm TeV}$. [...]
CMS-PAS-HIG-14-002.- Geneva : CERN, 2014 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; Fulltext in PDF: PDF;

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2014-03-19
19:55
Search for associated production of a single top quark and a Higgs boson in events where the Higgs boson decays to two photons at $\sqrt{s} = 8$~TeV /CMS Collaboration
We study the associated production of a single top quark and a Higgs boson, in order to directly constrain the top-Higgs coupling. Due to the destructive interference in the t-channel for standard model couplings, this process is very sensitive to both the magnitude and the sign of a non-standard top-Higgs coupling. [...]
CMS-PAS-HIG-14-001.- Geneva : CERN, 2014 Figure_001-a: PDF; Figure_001-b: PDF; Figure_002: PDF; Figure_003: PDF; Fulltext in PDF: PDF;

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2014-03-19
12:16
Search for Third Generation Scalar Leptoquarks Decaying to Top Quark - Tau Lepton Pairs in pp Collisions /CMS Collaboration
A search for pair-production of third generation scalar leptoquarks decaying to top quark and tau lepton pairs is presented using the 19.5 $\mathrm{fb^{-1}}$ of data collected by the CMS detector at the LHC in $\mathrm{pp}$ collisions at $\sqrt{s}=8$ TeV. An excess of events containing same-sign muon and hadronic tau candidates with two or more jets is sought after, but the observations are found to be in agreement with the standard model predictions. [...]
CMS-PAS-EXO-12-030.- Geneva : CERN, 2014 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_005-a: PDF; Figure_005-b: PDF; Figure_005-c: PDF; Figure_005-d: PDF; Fulltext in PDF: PDF;

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2014-03-19
12:12
First combination of Tevatron and LHC measurements of the top-quark mass
We present a combination of measurements of the mass of the top quark, $m_{\rm top}$, performed by the CDF and D0 experiments at the Tevatron collider and the ATLAS and CMS experiments at the Large Hadron Collider (LHC). [...]
arXiv:1403.4427 ; ATLAS-CONF-2014-008 ; CDF-NOTE-11071 ; CMS-PAS-TOP-13-014 ; D0-NOTE-6416.
- 2014. - 34 p.
Additional information for the analysis (restricted access) - Figure_001-a - Figure_001-b - Figure_001-c - Figure_002 - Figure_003-a - Figure_003-b - Figure_003-c - Figure_003-d - Figure_004 - Figure_005 - Figure_006-a - Figure_006-b - Figure_006-c - Figure_006-d - Figure_006-e - Figure_006-f - Figure_007-a - Figure_007-b - Figure_007-c - Figure_007-d - Original Communication (restricted to ATLAS) - Preprint

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