# CMS Conference Reports

Ostatnio dodane:
2019-11-07
16:17
 $\alpha_{\rm s}$ determinations from CMS / Rabbertz, Klaus (KIT, Karlsruhe, EKP) /CMS Collaboration Significant progress in experimental and theoretical techniques allow a determination of the strong coupling constant $\alpha_{\rm s}$ from proton-proton collisions with much improved precision. Results of the CMS experiment at the LHC are reviewed, which are based on measurements of jet and of top-quark pair production.. CMS-CR-2019-047.- Geneva : CERN, 2019 - 6 p. Fulltext: PDF; In : Workshop on precision measurements of the QCD coupling constant (alphas-2019), Trento, Italy, 11 - 15 Feb 2019

2019-11-07
16:09
 Study of rare decays at CMS / Wang, Dayong (Peking U.) /CMS Collaboration Rare decays of heavy flavors and tau leptons could be very sensitive probes for searching for new physics. This presentation summarizes some recent CMS results on rare decays with different data sets. [...] CMS-CR-2019-135.- Geneva : CERN, 2019 - 5 p. Fulltext: PDF; In : XXIX International Symposium on Lepton Photon Interactions at High Energies, Toronto, Canada, 5 - 10 Aug 2019

2019-11-07
16:09
 UNDERSTANDING THE BEAM EMITTANCE EVOLUTION DURING STABLE BEAMS BASED ON EMITTANCE SCANS / Karacheban, Olena (CERN) /CMS Collaboration High-luminosity production at the LHC is closely linked to the size of the transverse beam emittance. However emittance measurement is challenging. [...] CMS-CR-2019-238.- Geneva : CERN, 2019 - 8 p. Fulltext: PDF; In : LHC Lumi Days 2019, Cern, Switzerland, 4 - 5 Jun 2019

2019-11-07
16:09
 Results and prospects with the CMS-TOTEM Precision Proton Spectrometer / Forthomme, Laurent Marie C (Helsinki U.) /CMS and TOTEM Collaborations With more than 100 fb$^{-1}$ recorded during LHC run 2 (2016-2018), the joint CMS-TOTEM Precision Proton Spectrometer (CT-PPS) has started to deliver its first physics results.Located between 200 and 220 m on each side from the CMS detector, it aims the detection of forward scattered protons emerging intact from the interaction, as for instance in central exclusive processes (CEP).In this proceeding we describe in details the search for two-photon production of a lepton pair performed with the first 10 fb$^{-1}$.With this result, it has proved for the first time the feasibility of operating near-beam detectors close to the LHC beams under nominal luminosity conditions.In addition, we describe the potential for future physics prospects in preparation to the run 3 of the LHC.. CMS-CR-2019-241.- Geneva : CERN, 2019 - 7 p. Fulltext: PDF; In : European Physical Society Conference on High Energy Physics (EPS-HEP) 2019, Ghent, Belgium, 10 - 17 Jul 2019

2019-11-07
16:09
 Design of the CMS upgraded trigger from Phase I to Phase II of the LHC / Jeitler, Manfred (Vienna, OAW) /CMS Collaboration The CMS experiment implements a sophisticated two-level triggering system composed of the Level-1, instrumented by custom-design hardware boards, and the High Level Trigger, a streamlined version of the offline reconstruction software running on a computer farm (more than 30k CPU cores). In 2017, the LHC delivered proton-proton collisions at a centre-of-mass energy of 13 TeV with a peak instantaneous luminosity larger than $2 \cdot 10^{34}$ cm$^{-2}$s$^{-1}$, more than twice the peak luminosity reached during Run1 and far larger than the design value. [...] CMS-CR-2019-260.- Geneva : CERN, 2019 - 8 p. Fulltext: PDF; In : European Physical Society Conference on High Energy Physics (EPS-HEP) 2019, Ghent, Belgium, 10 - 17 Jul 2019

2019-11-06
15:20
 Search for the Higgs boson in the associated vector boson production mode where the vector boson decays leptonically and the Higgs boson decays to a pair of bottom quarks / Gedia, Krunal (Zurich, ETH) /CMS Collaboration A measurement of the Higgs-beauty quark coupling through the Higgs boson production associated with a Z or W boson where the W/Z boson decays leptonically and the Higgs boson to a pair of bottom quarks is presented. The analysis is based on 41.3 $\mathrm{fb}^{-1}$ data from proton-proton collisions at $\sqrt{s}=$13 TeV collected by CMS in 2017. [...] CMS-CR-2019-249.- Geneva : CERN, 2019 - 6 p. Fulltext: PDF; In : European Physical Society Conference on High Energy Physics (EPS-HEP) 2019, Ghent, Belgium, 10 - 17 Jul 2019

2019-10-30
14:01
 Higgs boson mass measurement using ${\rm H \rightarrow ZZ \rightarrow 4\ell}$ decays at CMS / Jake Rosenzweig /CMS Collaboration A summary of the methods used to make a precision measurement of the Higgs boson mass is presented. The final mass value for the Higgs boson is measured to be $m_\mathrm{H} = 125.26 \pm 0.21\ \mathrm{GeV}$. [...] CMS-CR-2019-198.- Geneva : CERN, 2019 - 10 p. Fulltext: PDF; In : 2019 Meeting of the Division of Particles & Fields of the American Physical Society, Boston, United States Of America, 29 Jul - 2 Aug 2019

2019-10-24
17:18
 Searches for additional neutral Higgs bosons at CMS / Moran, Dermot Anthony (Madrid, CIEMAT) /CMS Collaboration Searches for additional neutral Higgs bosons by the CMS experiment at the LHC are presented. A number of different decay channels and production mechanisms are covered. The analyses are based on proton-proton collisions at $\sqrt{s} =$ 13 TeV recorded in 2016, corresponding to an integrated luminosity of 35.9 $\mathrm{fb^{-1}}$. [...] CMS-CR-2019-143.- Geneva : CERN, 2019 - 8 p. Fulltext: PDF; In : European Physical Society Conference on High Energy Physics (EPS-HEP) 2019, Ghent, Belgium, 10 - 17 Jul 2019

2019-10-23
16:25
 Searches for Light Higgs Bosons at the CMS Experiment / Kalogeropoulos, Alexis (Princeton U.) /CMS Collaboration We report on recent results by the CMS Collaboration on searches for light Higgs bosons based on a sample of proton-proton collision data at $\sqrt{s} =13$ TeV, corresponding to a total integrated luminosity of 35.9 fb$^{-1}$.. CMS-CR-2019-098.- Geneva : CERN, 2019 - 7 p. Fulltext: PDF; In : The XXVII International Workshop on Deep Inelastic Scattering and Related Subjects, Turin, Italy, 8 - 12 Apr 2019

2019-10-23
16:15
 Rare top quark production in CMS ttZ, tZ, tgamma, and tttt production / Alvarez Gonzalez, Barbara (Oviedo U.) /CMS Collaboration A comprehensive set of measurements of top quark pair and single top quark production in association with EWK bosons (Z or $\gamma$) is presented. The results are compared to theory predictions and re-interpreted as searches for new physics inducing deviations from the standard model predictions using an effective field theory approach. [...] CMS-CR-2019-228.- Geneva : CERN, 2019 - 5 p. Fulltext: PDF; In : 31st Recontres de Blois (Particle Physics and Cosmology), Blois, France, 2 - 7 Jun 2019