Browsing Natural and Mathematical Sciences by Subject "Top physics"
Now showing items 21-40 of 47
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Measurement of top quark polarisation in t-channel single top quark production
(2016-04)A first measurement of the top quark spin asymmetry, sensitive to the top quark polarisation, in t-channel single top quark production is presented. It is based on a sample of pp collisions at a centre-of-mass energy of 8 ... -
Measurements of the t(t)Overbar charge asymmetry using the dilepton decay channel in pp collisions at root s=7 TeV
(Springer Science+Business Media, 2014-04)The t(t)Overbar charge asymmetry in proton-proton collisions root s = 7TeV is measured using the dilepton decay channel (ee, e mu, or mu mu). The data correspond to a total integrated luminosity of 5.0 fb(-1), collected ... -
Measurements of tt¯ differential cross sections in proton-proton collisions at s√=13 TeV using events containing two leptons
(Springer Nature, 2019-02-22)Measurements of differential top quark pair t (t) over bar cross sections using events produced in proton-proton collisions at a centre-of-mass energy of 13 TeV containing two oppositely charged leptons are presented. The ... -
Observation of top quark pairs produced in association with a vector boson in pp collisions at root s=8 TeV
(Springer Nature, 2016-01)Measurements of the cross sections for top quark pairs produced in association with a W or Z boson are presented, using 8 TeV pp collision data corresponding to an integrated luminosity of 19.5 fb−1, collected by the CMS ... -
Observation of tW production in the single-lepton channel in pp collisions at s√ = 13 TeV
(Springer, 2021-11-11)A measurement of the cross section of the associated production of a single top quark and a W boson in final states with a muon or electron and jets in proton-proton collisions at s = 13 TeV is presented. The data correspond ... -
Probing effective field theory operators in the associated production of top quarks with a Z boson in multilepton final states at s√ = 13 TeV
(Springer, 2021-12-13)A search for new top quark interactions is performed within the framework of an effective field theory using the associated production of either one or two top quarks with a Z boson in multilepton final states. The data ... -
Search for a heavy resonance decaying to a top quark and a vector-like top quark at √s=13 TeV
(Springer International Publishing, 2017-09-13)A search is presented for massive spin-1 Z′ resonances decaying to a top quark and a heavy vector-like top quark partner T. The search is based on a 2.6 fb−1 sample of proton-proton collisions at 13 TeV collected with the ... -
Search for anomalous single top quark production in association with a photon in pp collisions at √s = 8 TeV
(2016-04)The result of a search for flavor changing neutral currents (FCNC) through single top quark production in association with a photon is presented. The study is based on proton-proton collisions at a center-of-mass energy ... -
Search for anomalous Wtb couplings and flavour-changing neutral currents in t-channel single top quark production in pp collisions at root s=7 and 8 TeV
(Springer International, 2017)Single top quark events produced in the t channel are used to set limits on anomalous Wtb couplings and to search for top quark flavour-changing neutral current (FCNC) interactions. The data taken with the CMS detector at ... -
Search for associated production of a Z boson with a single top quark and for tZ flavour-changing interactions in pp collisions at s√=8 TeV
(Springer International Publishing, 2017-07-03)A search for the production of a single top quark in association with a Z boson is presented, both to identify the expected standard model process and to search for flavour-changing neutral current interactions. The data ... -
Search for CP violation in t(t)over-bar production and decay in proton-proton collisions at root s=8 TeV
(Springer International, 2017)The results of a first search for CP violation in the production and decay of top quark-antiquark ( tt¯tt¯ ) pairs are presented. The search is based on asymmetries in T-odd, triple-product correlation observables, where ... -
Search for dark matter produced in association with a single top quark or a top quark pair in proton-proton collisions at √s = 13 TeV
(Springer Nature, 2019-03-25)A search for dark matter produced in association with top quarks in proton-proton collisions at a center-of-mass energy of 13 TeV is presented. The data set used corresponds to an integrated luminosity of 35.9 fb(-1) ... -
Search for electroweak production of a vector-like quark decaying to a top quark and a Higgs boson using boosted topologies in fully hadronic final states
(Springer International Publishing, 2017)A search is performed for electroweak production of a vector-like top quark partner T of charge 2/3 in association with a standard model top or bottom quark, using 2.3 fb−1 of proton-proton collision data at s√=13s=13 ... -
Search for flavor-changing neutral current interactions of the top quark and the Higgs boson decaying to a bottom quark-antiquark pair at √s = 13 TeV
(Springer, 2022-02-21)A search for flavor-changing neutral current interactions of the top quark (t) and the Higgs boson (H) is presented. The search is based on a data sample corresponding to an integrated luminosity of 137 fb−1 recorded by ... -
Search for new physics in top quark production with additional leptons in proton-proton collisions at s√ = 13 TeV using effective field theory
(Springer, 2021-03-09)Events containing one or more top quarks produced with additional prompt leptons are used to search for new physics within the framework of an effective field theory (EFT). The data correspond to an integrated luminosity ... -
Search for pair production of excited top quarks in the lepton plus jets final state
(Springer Science+Business Media, 2014-06)A search is performed for pair-produced spin-3/2 excited top quarks , each decaying to a top quark and a gluon. The search uses data collected with the CMS detector from pp collisions at a center-of-mass energy of = 8 TeV, ... -
Search for s channel single top quark production in pp collisions at root s=7 and 8 TeV
(Springer Nature, 2016-09)A search is presented for single top quark production in the s channel in proton-proton collisions with the CMS detector at the CERN LHC in decay modes of the top quark containing a muon or an electron in the final state. ... -
Search for standard model production of four top quarks in the lepton + jets channel in pp collisions at √s = 8 TeV
(Springer International Publishing, 2014-11)A search is presented for standard model (SM) production of four top quarks (tt¯tt¯)(tt¯tt¯) in pp collisions in the lepton + jets channel. The data correspond to an integrated luminosity of 19.6 fb−1 recorded at a ... -
Search for t t ¯ H production in the H → b b ¯ decay channel with leptonic t t ¯ decays in proton-proton collisions at √s = 13 TeV
(Springer Nature, 2019-03-05)A search is presented for the associated production of a standard model Higgs boson with a top quark-antiquark pair (ttH), in which the Higgs boson decays into a b quark-antiquark pair, in proton-proton collisions at a ... -
Search for the associated production of a Higgs boson with a single top quark in proton-proton collisions at root s=8 TeV
(Springer Nature, 2016-06)This paper presents the search for the production of a Higgs boson in association with a single top quark (tHq), using data collected in proton-proton collisions at a center-of-mass energy of 8 TeV corresponding to an ...
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