Wyniki wyszukiwania dla: G.B. Cerati

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Search for R-parity violating supersymmetry in pp collisions at s=13TeV using b jets in a final state with a single lepton, many jets, and high sum of large-radius jet masses

A.M. Sirunyan, A. Tumasyan, W. Adam, F. Ambrogi, więcej

Physics Letters B > 2018 > 783 > C > 114-139

Results are reported from a search for physics beyond the standard model in proton–proton collisions at a center-of-mass energy of s=13TeV. The search uses a signature of a single lepton, large jet and bottom quark jet multiplicities, and high sum of large-radius jet masses, without any requirement on the missing transverse momentum in an event. The data sample corresponds to an integrated luminosity...

artykuł

Search for heavy resonances decaying to a top quark and a bottom quark in the lepton+jets final state in proton–proton collisions at 13 TeV

A.M. Sirunyan, A. Tumasyan, W. Adam, F. Ambrogi, więcej

Physics Letters B > 2018 > 777 > C > 39-63

A search is presented for narrow heavy resonances decaying to a top quark and a bottom quark using data collected by the CMS experiment at s=13TeV in 2016. The data set analyzed corresponds to an integrated luminosity of 35.9fb−1 . Final states that include a single lepton (e, μ), multiple jets, and missing transverse momentum are analyzed. No evidence is found for the production of a W′ boson, and...

artykuł

Measurements of tt¯ cross sections in association with b jets and inclusive jets and their ratio using dilepton final states in pp collisions at s=13TeV

A.M. Sirunyan, A. Tumasyan, W. Adam, E. Asilar, więcej

Physics Letters B > 2018 > 776 > C > 355-378

The cross sections for the production of tt¯bb¯ and tt¯jj events and their ratio σtt¯bb¯/σtt¯jj are measured using data corresponding to an integrated luminosity of 2.3 fb⁻¹collected in pp collisions at s=13 TeV with the CMS detector at the LHC. Events with two leptons (e or μ) and at least four reconstructed jets, including at least two identified as b quark jets, in the final state are selected...

artykuł

Azimuthal anisotropy of charged particles with transverse momentum up to 100 GeV/c in PbPb collisions at sNN=5.02 TeV

A.M. Sirunyan, A. Tumasyan, W. Adam, E. Asilar, więcej

Physics Letters B > 2018 > 776 > C > 195-216

The Fourier coefficients v2 and v3 characterizing the anisotropy of the azimuthal distribution of charged particles produced in PbPb collisions at sNN=5.02 TeV are measured with data collected by the CMS experiment. The measurements cover a broad transverse momentum range, 1<pT<100 GeV/c. The analysis focuses on the pT>10 GeV/c range, where anisotropic azimuthal distributions should reflect...

artykuł

Constraints on anomalous Higgs boson couplings using production and decay information in the four-lepton final state

A.M. Sirunyan, A. Tumasyan, W. Adam, F. Ambrogi, więcej

Physics Letters B > 2017 > 775 > C > 1-24

A search is performed for anomalous interactions of the recently discovered Higgs boson using matrix element techniques with the information from its decay to four leptons and from associated Higgs boson production with two quark jets in either vector boson fusion or associated production with a vector boson. The data were recorded by the CMS experiment at the LHC at a center-of-mass energy of 13TeV...

artykuł

Search for a heavy composite Majorana neutrino in the final state with two leptons and two quarks at s=13TeV

A.M. Sirunyan, A. Tumasyan, W. Adam, F. Ambrogi, więcej

Physics Letters B > 2017 > 775 > C > 315-337

A search for physics beyond the standard model in the final state with two same-flavour leptons (electrons or muons) and two quarks produced in proton–proton collisions at s=13TeV is presented. The data were recorded by the CMS experiment at the CERN LHC and correspond to an integrated luminosity of 2.3fb−1. The observed data are in good agreement with the standard model background prediction. The...

artykuł

Measurement of vector boson scattering and constraints on anomalous quartic couplings from events with four leptons and two jets in proton–proton collisions at s=13 TeV

A.M. Sirunyan, A. Tumasyan, W. Adam, F. Ambrogi, więcej

Physics Letters B > 2017 > 774 > C > 682-705

A measurement of vector boson scattering and constraints on anomalous quartic gauge couplings from events with two Z bosons and two jets are presented. The analysis is based on a data sample of proton–proton collisions at s=13 TeV collected with the CMS detector and corresponding to an integrated luminosity of 35.9 fb−1. The search is performed in the fully leptonic final state ZZ→ℓℓℓ′ℓ′, where ℓ,ℓ′=e...

artykuł

Search for black holes and other new phenomena in high-multiplicity final states in proton–proton collisions at s=13TeV

A.M. Sirunyan, A. Tumasyan, W. Adam, E. Asilar, więcej

Physics Letters B > 2017 > 774 > C > 279-307

A search for new physics in energetic, high-multiplicity final states has been performed using proton–proton collision data collected with the CMS detector at a center-of-mass energy of 13TeV and corresponding to an integrated luminosity of 2.3fb−1. The standard model background, dominated by multijet production, is determined exclusively from control regions in data. No statistically significant...

artykuł

Combination of searches for heavy resonances decaying to WW, WZ, ZZ, WH, and ZH boson pairs in proton–proton collisions at s=8 and 13 TeV

A.M. Sirunyan, A. Tumasyan, W. Adam, E. Asilar, więcej

Physics Letters B > 2017 > 774 > C > 533-558

A statistical combination of searches is presented for massive resonances decaying to WW, WZ, ZZ, WH, and ZH boson pairs in proton–proton collision data collected by the CMS experiment at the LHC. The data were taken at centre-of-mass energies of 8 and 13 TeV, corresponding to respective integrated luminosities of 19.7 and up to 2.7 fb⁻¹. The results are interpreted in the context of heavy vector...

artykuł

CMS Collaboration

A.M. Sirunyan, A. Tumasyan, W. Adam, E. Asilar, więcej

Nuclear Physics A > 2017 > 967 > C > 965-982

artykuł

Search for leptophobic Z′ bosons decaying into four-lepton final states in proton–proton collisions at s=8TeV

V. Khachatryan, A.M. Sirunyan, A. Tumasyan, W. Adam, więcej

Physics Letters B > 2017 > 773 > C > 563-584

A search for heavy narrow resonances decaying into four-lepton final states has been performed using proton–proton collision data at s=8TeV collected by the CMS experiment, corresponding to an integrated luminosity of 19.7fb−1. No excess of events over the standard model background expectation is observed. Upper limits for a benchmark model on the product of cross section and branching fraction for...

artykuł

Search for standard model production of four top quarks in proton–proton collisions at s=13 TeV

A.M. Sirunyan, A. Tumasyan, W. Adam, E. Asilar, więcej

Physics Letters B > 2017 > 772 > C > 336-358

A search for events containing four top quarks (tt¯tt¯) is reported from proton–proton collisions recorded by the CMS experiment at s=13 TeV and corresponding to an integrated luminosity of 2.6 fb⁻¹. The analysis considers the single-lepton (e or μ)+jets and the opposite-sign dilepton (μ+μ−, μ±e∓, or e+e−)+jets channels. It uses boosted decision trees to combine information on the global event and...

artykuł

Measurements of the charm jet cross section and nuclear modification factor in pPb collisions at sNN=5.02 TeV

A.M. Sirunyan, A. Tumasyan, W. Adam, E. Asilar, więcej

Physics Letters B > 2017 > 772 > C > 306-329

The CMS Collaboration presents the first measurement of the differential cross section of jets from charm quarks produced in proton–lead (pPb) collisions at a nucleon–nucleon center-of-mass energy of sNN=5.02TeV, as well as results from charm quark jets in proton–proton (pp) collisions at s=2.76 and 5.02TeV. By comparing the yields of the pPb and pp collision systems at the same energy, a nuclear...

artykuł

Search for single production of vector-like quarks decaying into a b quark and a W boson in proton–proton collisions at s=13TeV

A.M. Sirunyan, A. Tumasyan, W. Adam, E. Asilar, więcej

Physics Letters B > 2017 > 772 > C > 634-656

A search is presented for a heavy vector-like quark, decaying into a b quark and a W boson, which is produced singly in association with a light flavor quark and a b quark. The analysis is performed using a data sample of proton–proton collisions at a center-of-mass energy of s=13TeV collected at the LHC in 2015. The data set used in the analysis corresponds to an integrated luminosity of 2.3fb−1...

artykuł

Search for anomalous couplings in boosted WW/WZ→ℓνqq‾ production in proton–proton collisions at s=8 TeV

A.M. Sirunyan, A. Tumasyan, W. Adam, E. Asilar, więcej

Physics Letters B > 2017 > 772 > C > 21-42

This Letter presents a search for new physics manifested as anomalous triple gauge boson couplings in WW and WZ diboson production in proton–proton collisions. The search is performed using events containing a W boson that decays leptonically and a W or Z boson whose decay products are merged into a single reconstructed jet. The data, collected at s=8 TeV with the CMS detector at the LHC, correspond...

artykuł

Search for high-mass Zγ resonances in proton–proton collisions at s=8 and 13 TeV using jet substructure techniques

A.M. Sirunyan, A. Tumasyan, W. Adam, E. Asilar, więcej

Physics Letters B > 2017 > 772 > C > 363-387

A search for massive resonances decaying to a Z boson and a photon is performed in events with a hadronically decaying Z boson candidate, separately in light-quark and b quark decay modes, identified using jet substructure and advanced b tagging techniques. Results are based on samples of proton–proton collisions collected with the CMS detector at the LHC at center-of-mass energies of 8 and 13TeV,...

artykuł

Cross section measurement of t-channel single top quark production in pp collisions at s=13TeV

A.M. Sirunyan, A. Tumasyan, W. Adam, E. Asilar, więcej

Physics Letters B > 2017 > 772 > C > 752-776

The cross section for the production of single top quarks in the t channel is measured in proton–proton collisions at 13TeV with the CMS detector at the LHC. The analyzed data correspond to an integrated luminosity of 2.2fb−1. The event selection requires one muon and two jets where one of the jets is identified as originating from a bottom quark. Several kinematic variables are then combined into...

artykuł

Coherent J/ψ photoproduction in ultra-peripheral PbPb collisions at sNN=2.76TeV with the CMS experiment

V. Khachatryan, A.M. Sirunyan, A. Tumasyan, W. Adam, więcej

Physics Letters B > 2017 > 772 > C > 489-511

The cross section for coherent J/ψ photoproduction accompanied by at least one neutron on one side of the interaction point and no neutron activity on the other side, Xn0n, is measured with the CMS experiment in ultra-peripheral PbPb collisions at sNN=2.76TeV. The analysis is based on a data sample corresponding to an integrated luminosity of 159μb−1, collected during the 2011 PbPb run. The J/ψ mesons...

artykuł

Search for single production of a heavy vector-like T quark decaying to a Higgs boson and a top quark with a lepton and jets in the final state

V. Khachatryan, A.M. Sirunyan, A. Tumasyan, W. Adam, więcej

Physics Letters B > 2017 > 771 > C > 80-105

A search for single production of vector-like top quark partners (T) decaying into a Higgs boson and a top quark is performed using data from pp collisions at a centre-of-mass energy of 13 TeV collected by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 2.3 fb⁻¹. The top quark decay includes an electron or a muon while the Higgs boson decays into a pair of b quarks...

artykuł

Measurement of the differential inclusive B+ hadron cross sections in pp collisions at s=13 TeV

V. Khachatryan, A.M. Sirunyan, A. Tumasyan, W. Adam, więcej

Physics Letters B > 2017 > 771 > C > 435-456

The differential cross sections for inclusive production of B+ hadrons are measured as a function of the B+ transverse momentum pTB and rapidity yB in pp collisions at a centre-of-mass energy of 13 TeV, using data collected by the CMS experiment that correspond to an integrated luminosity of 48.1 pb⁻¹. The measurement uses the exclusive decay channel B+→J/ψK+, with J/ψ mesons that decay to a pair...

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