CMS Conference Reports

Derniers ajouts:
2018-07-23
11:17
 Elliptic and higher-order azimuthal anisotropies via multiparticle correlations in pPb and PbPb collisions with the CMS experiment / Wang, Quan (Kansas U.) /CMS Collaboration The elliptic and higher-order azimuthal anisotropy Fourier harmonics ($v_n$) are obtained for pPb collisions at $\sqrt{s_{NN}} = 8.16$ TeV over a wide range of event multiplicities based on multiparticle correlations. The data were collected by the CMS experiment during the 2016 LHC run. [...] CMS-CR-2018-127.- Geneva : CERN, 2018 - 5 p. Fulltext: PDF; In : The 27th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions, Venice, Italy, 13 - 19 May 2018

2018-07-23
11:16
 (YSF) Search for SUSY with a Highly Compressed Mass Spectrum in the Soft Single Lepton Channel with the CMS Experiment / Zarucki, Mateusz (Vienna, OAW) /CMS Collaboration SUSY models with compressed mass spectra are highly motivated by theoretical considerations, such as dark matter constraints and naturalness. The search targets simplified models in which the signal consists of top squark (stop) pair-production, followed by 4-body decays or decays via an intermediate chargino. [...] CMS-CR-2018-128.- Geneva : CERN, 2018 - 8 p. Fulltext: PDF; In : an Alpine LHC Physics Summit, Obergurgl, Austria, 15 - 20 Apr 2018

2018-07-23
11:16
 (YSF) Search for top squarks and dark matter particles in opposite-charge dilepton final states at CMS / Spitzbart, Daniel (Vienna, OAW) /CMS Collaboration A search for new physics is presented in final states with two oppositely charged leptons, jets identified as originating from b quarks, and missing transverse momentum using 35.9/fb of CMS data recorded in 2016. Hypothetical signal events are efficiently separated from the dominant top quark pair background with requirements on missing transverse momentum and transverse mass variables, the latter reducing the background by four orders of magnitude. [...] CMS-CR-2018-134.- Geneva : CERN, 2018 - 8 p. Fulltext: PDF; In : an Alpine LHC Physics Summit, Obergurgl, Austria, 15 - 20 Apr 2018

2018-07-17
10:43
 Search and measurement of the SM Higgs boson / Donato, Silvio (Zurich U.) /ATLAS and CMS Collaborations After the success of the LHC Run-1 physics program, the ATLAS and CMS Collaborations have presented their results obtained with the first $\sim 36\,\textnormal{fb}^{-1}$ of integrated luminosity delivered by the LHC at $\sqrt{s} = 13\,\textnormal{TeV}$ in Run-2. We present the main results obtained on the Standard Model Higgs boson, including the searches for specific decay and production channels, and the measurements of the Higgs boson couplings and differential cross section.. CMS-CR-2018-114.- Geneva : CERN, 2018 - 10 p. Fulltext: PDF; In : XXXII Rencontres de Physique de La Vallée d'Aoste, La Thuile(ao), Italy, 25 Feb - 3 Mar 2018

2018-07-16
10:53
 Interpretation of non-MET+X ATLAS and CMS searches for dark matter scenarios / Wulz, Claudia (Vienna, OAW) /ATLAS ,CMS and SUSY Collaborations Dark matter searches by the ATLAS and CMS experiments at the CERN LHC in final states with no missing transverse energy are presented, using channels with dileptons and dijets, in particular. Through a study of dijet angular distributions the low-mass mediator regions have been explored for the first time.Most of the analyses were performed with data recorded at a centre-of-mass energy of 13~TeV.. CMS-CR-2018-125.- Geneva : CERN, 2018 - 8 p. Fulltext: PDF; In : an Alpine LHC Physics Summit, Obergurgl, Austria, 15 - 20 Apr 2018

2018-07-13
09:13
 Measurement of collective flow in XeXe collisions at 5.44 TeV with the CMS experiment / Stojanovic, Milan (VINCA Inst. Nucl. Sci., Belgrade) /CMS Collaboration New measurements of collective flow in XeXe collisions at a center-of-mass energy of 5.44 TeV per nucleon pair, collected by the CMS experiment at the LHC, are presented. The $v_{2}$, $v_{3}$ and $v_{4}$ Fourier coefficients of the anisotropic azimuthal distribution are obtained employing three different analysis techniques two-particle correlations, scalar product method and multiparticle cumulants, which have different sensitivities to non-flow and flow fluctuation effects. [...] CMS-CR-2018-123.- Geneva : CERN, 2018 - 5 p. Fulltext: PDF; In : The 27th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions, Venice, Italy, 13 - 19 May 2018

2018-07-13
09:13
 Beyond nPDF effects: Prompt J/$\psi$ and $\psi(2S)$ production in pPb collisions with the CMS detector / Oh, Geonhee (Chonnam Natl. U.) /CMS Collaboration Measurements of prompt $\psi$(2S) meson production cross sections in proton-lead (pPb) and proton-proton (pp) collisions at a nucleon-nucleon center-of-mass energy of $\sqrt{s_{NN}}$ = 5.02 TeV are reported. The results are based on pPb and pp data collected by the CMS experiment at the LHC, corresponding to integrated luminosities of 34.6 $\mathrm{nb^{-1}}$ and 28.0 $\mathrm{pb^{-1}}$, respectively. [...] CMS-CR-2018-118.- Geneva : CERN, 2018 - 5 p. Fulltext: PDF; In : The 27th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions, Venice, Italy, 13 - 19 May 2018

2018-07-13
09:13
 Fragmentation of ${\rm J}\hspace{-.08em}/\hspace{-.14em}\psi$ in jets in pp collisions at $\sqrt{s} = 5.02~\mathrm{TeV}$ / Diab, Batoul (Ecole Polytechnique) /CMS Collaboration The fragmentation of jets containing a ${\rm J}\hspace{-.08em}/\hspace{-.14em}\psi$ meson is studied in 5.02~TeV pp data using an integrated luminosity of ${\cal L} = 27.39~\mathrm{pb^{-1}}$. The fraction of the jet transverse momentum $p_{\rm T,jet}$ carried by the ${\rm J}\hspace{-.08em}/\hspace{-.14em}\psi$ is measured for prompt ${\rm J}\hspace{-.08em}/\hspace{-.14em}\psi$ and ${\rm J}\hspace{-.08em}/\hspace{-.14em}\psi$ coming from b hadron decays, named nonprompt. [...] CMS-CR-2018-115.- Geneva : CERN, 2018 - 4 p. Fulltext: PDF; In : The 27th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions, Venice, Italy, 13 - 19 May 2018

2018-07-13
09:13
 D$^0$ Meson R$_{AA}$ in PbPb Collisions at $\sqrt s_{NN}$ = 5.02~TeV and Elliptic Flow in pPb Collisions at $\sqrt s_{NN}$ = 8.16~TeV with CMS / SHI, Zhaozhong (MIT) /CMS Collaboration The study of charm production in heavy-ion collisions is considered an excellent probe to study the properties of the hot and dense medium created in heavy-ion collisions. Measurements of D-meson nuclear modification can provide strong constraints into the mechanisms of in-medium energy loss and charm flow in the medium. [...] CMS-CR-2018-112.- Geneva : CERN, 2018 - 5 p. Fulltext: PDF; In : The 27th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions, Venice, Italy, 13 - 19 May 2018

2018-07-13
09:13
 Search for the chiral magnetic effect at the LHC with the CMS experiment / Tu, Zhoudunming (Rice U.) /CMS Collaboration Searches for the chiral magnetic effect (CME) using charge-dependent azimuthal correlations with respect to event planes are presented in PbPb collisions at 5.02~TeV and pPb collisions at 5.02 and 8.16~TeV, with the CMS experiment at the LHC. The azimuthal correlations with respect to the second- and third-order event planes are explored as a function of pseudorapidity, transverse momentum, and event multiplicity, which provides new insights into the underlying background correlations. [...] CMS-CR-2018-103.- Geneva : CERN, 2018 - 5 p. Fulltext: PDF; In : The 27th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions, Venice, Italy, 13 - 19 May 2018