10 documents found, page 1 of 1
Search for dark matter particles produced in association with a top quark pair ...
CMS collaboration (2304 authors); Nayak, Aruna; Araujo, Mariana; Bargassa, Pedrame; Beirão da Cruz e Silva, Cristóvão; Di Francesco, AgostinoA search is performed for dark matter particles produced in association with a top quark pair in proton-proton collisions at s=13 TeV. The data correspond to an integrated luminosity of 35.9 fb-1 recorded by the CMS detector at the LHC. No significant excess over the standard model expectation is observed. The results are interpreted using simplified models of dark matter production via spin-0 mediators that ...
Search for high-mass resonances in dilepton final states in proton-proton colli...
CMS collaboration (2304 authors); Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Di Francesco, Agostino; Faccioli, PietroA search is presented for new high-mass resonances decaying into electron or muon pairs. The search uses proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the CMS experiment at the LHC in 2016, corresponding to an integrated luminosity of 36 fb$^{−1}$. Observations are in agreement with standard model expectations. Upper limits on the product of a new resonance production cross sect...
Search for dark matter produced in association with a Higgs boson decaying to $...
CMS collaboration (2304 authors); Nayak, Aruna; Bargassa, Pedrame; Da Cruz E Silva, Crist�v�o Beir�o; Di Francesco, Agostino; Faccioli, PietroA search for dark matter particles is performed by looking for events with large transverse momentum imbalance and a recoiling Higgs boson decaying to either a pair of photons or a pair of τ leptons. The search is based on proton-proton collision data at a center-of-mass energy of 13 TeV collected at the CERN LHC in 2016 and corresponding to an integrated luminosity of 35.9 fb$^{−1}$. No significant excess over...
Search for pair-produced resonances each decaying into at least four quarks in ...
CMS collaboration (2304 authors); Nayak, Aruna; Bargassa, Pedrame; Beirão da Cruz e Silva, Cristóvão; Di Francesco, Agostino; Faccioli, PietroThis letter presents the results of a search for pair-produced particles of masses above 100 GeV that each decay into at least four quarks. Using data collected by the CMS experiment at the LHC in 2015-2016, corresponding to an integrated luminosity of 38.2 fb$^{-1}$, reconstructed particles are clustered into two large jets of similar mass, each consistent with four-parton substructure. No statistically signif...
Search for resonant pair production of Higgs bosons decaying to bottom quark-an...
CMS collaboration (2304 authors); Nayak, Aruna; Bargassa, Pedrame; Da Cruz E Silva, Cristóvao Beirao; Di Francesco, Agostino; Faccioli, PietroA search for a narrow-width resonance decaying into two Higgs bosons, each decaying into a bottom quark-antiquark pair, is presented. The search is performed using proton-proton collision data corresponding to an integrated luminosity of 35.9 fb$^{-1}$ at $\sqrt{s}=$ 13 TeV recorded by the CMS detector at the LHC. No evidence for such a signal is observed. Upper limits are set on the product of the production c...
Searches for pair production of charginos and top squarks in final states with ...
CMS collaboration (2304 authors); Nayak, Aruna; Bargassa, Pedrame; Beirão da Cruz e Silva, Cristóvão; Di Francesco, Agostino; Faccioli, PietroA search for pair production of supersymmetric particles in events with two oppositely charged leptons (electrons or muons) and missing transverse momentum is reported. The data sample corresponds to an integrated luminosity of 35.9 fb$^{−1}$ of proton-proton collisions at $ \sqrt{s}=13 $ TeV collected with the CMS detector during the 2016 data taking period at the LHC. No significant deviation is observed from...
Search for black holes and sphalerons in high-multiplicity final states in prot...
CMS collaboration (2304 authors); Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Di Francesco, Agostino; Faccioli, PietroA search in energetic, high-multiplicity final states for evidence of physics beyond the standard model, such as black holes, string balls, and electroweak sphalerons, is presented. The data sample corresponds to an integrated luminosity of 35.9 fb$^{-1}$ collected with the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV in 2016. Standard model backgrounds, dominated b...
Measurement of the $\mathrm{t}\overline{{\mathrm{t}}}$ production cross section...
CMS collaboration (2304 authors); Hollar, Jonathan; Calpas, Betty; Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, CristóvãoThe cross section for $\mathrm{t}\overline{{\mathrm{t}}}$ production in the all-jets final state is measured in pp collisions at a centre-of-mass energy of 8 $\,\text {TeV}$ at the LHC with the CMS detector, in data corresponding to an integrated luminosity of 18.4 $\,\text {fb}^{-1}$ . The inclusive cross section is found to be $275.6 \pm 6.1 \,\text {(stat)} \pm 37.8 \,\text {(syst)} \pm 7.2 \,\text {(lumi)...
Event generator tunes obtained from underlying event and multiparton scattering...
CMS collaboration (2304 authors); Hollar, Jonathan; Calpas, Betty; Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, CristóvãoNew sets of parameters (“tunes”) for the underlying-event (UE) modelling of the pythia8, pythia6 and herwig++ Monte Carlo event generators are constructed using different parton distribution functions. Combined fits to CMS UE proton–proton ( $\mathrm {p}\mathrm {p}$ ) data at $\sqrt{s} = 7\,\text {TeV} $ and to UE proton–antiproton ( $\mathrm {p}\overline{\mathrm{p}} $ ) data from the CDF experiment at lower $\...
Measurement of the top quark pair production cross section in proton-proton col...
CMS collaboration (2304 authors); Hollar, Jonathan; Calpas, Betty; Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, CristóvãoThe top quark pair production cross section is measured for the first time in proton-proton collisions at s=13 TeV by the CMS experiment at the CERN LHC, using data corresponding to an integrated luminosity of 43 pb-1. The measurement is performed by analyzing events with at least one electron and one muon of opposite charge, and at least two jets. The measured cross section is 746±58(stat)±53(syst)±36(lumi) ...