Top Quark
Evidence for the associated production of a W boson and a top quark in ATLAS at root s = 7 TeV
... a top quark in the final state has the special feature that both particles can be ...single top-quark Wt-channel pro- duction cross-sections therefore serves as a direct probe of the W-t-b ...
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Measurement of the top quark charge in pp collisions at root s=7 TeV with the ATLAS detector
... “top quark” is really the SM top quark decaying into a b- quark and a W + boson, but also allows for a direct measurement of its electric charge with a significantly improved ...
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Comprehensive measurements of t channel single top quark production cross sections at s =7TeV with the ATLAS detector
... FIG. 8 (color online). Distributions of the three most important discriminating variables in the 2-jet- l þ and 2-jet- l − channels in the signal region normalized to the result of the binned maximum-likelihood fit to ...
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Measurement of top quark polarization in top antitop events from proton proton collisions at vs=7 TeV using the ATLAS detector
... the top quark mass is performed by repeating the fitting procedure using seven samples with different mass settings in the simulation, and interpolating the change in the parameter f corresponding to a ...
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Search for top quark decays t > q H with H > gamma gamma using the ATLAS detector
... remaining top quark in the event is searched for in two final states: a bottom quark and a hadronically decaying W boson, giving rise to events with four jets, or a leptonically decaying W boson, ...
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Measurement of the W boson polarization in top quark decays with the ATLAS detector
... parameter was varied in the 157.5–187.5 GeV range, to try to find one or more solutions. In case a range of top masses provided a solution, that with the top quark mass parameter closest to 172.5 GeV ...
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Search for FCNC single top quark production at root s=7 TeV with the ATLAS detector
... The top quark is the heaviest elementary particle known, with a mass of m top = 173 ...the top quark can be studied from proton–proton (pp) collisions at √ s = 7 TeV with the Large ...
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Measurement of the top quark pair production charge asymmetry in proton proton collisions at vs = 7 TeV using the ATLAS detector
... of top quark and ...the top quark and antiquark, due to interference between initial– and final– state gluon ...annihilation, top quarks are preferentially emitted in the direction of ...
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Search for a heavy top quark partner in final states with two leptons with the ATLAS detector at the LHC
... heavy top-quark partners in ...Heavy top-quark partners decaying into a top quark and a neutral non-interacting particle are searched for in events with two leptons in the final ...
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Study of heavy flavor quarks produced in association with top quark pairs at s =7TeV using the ATLAS detector
... each top quark decays to a b quark and a W boson, which subsequently decays to a neutrino and an isolated, charged ...from top-quark decays, t ¯ t → W þ bW − b ¯ ...
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Measurement of the charge asymmetry in top quark pair production in pp collisions at root s=7 TeV using the ATLAS detector
... Reconstructing top quark pair events is facilitated by the ability to tag jets from the hadronisation of b- ...light quark jets is based on a likelihood using the masses, momenta, flight- length ...
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Measurements of top quark pair relative differential cross sections with ATLAS in pp collisions at root s=7 TeV
... The reconstruction of t t ¯ events is aided by the ability to tag jets from the hadronization of b-quarks using the com- bination of two b-tagging algorithms [44]. One b-tagger de- rives the properties of vertices ...
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Search for s channel single top quark production in proton proton collisions at root s=8 TeV with the ATLAS detector
... the top-quark are recon- ...two top-quark candidates are then reconstructed by combining the four-momenta of the lepton and neutrino with each of the two b-jets (called leading and sub-leading ...
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Measurement of jet shapes in top quark pair events at root s=7 TeV using the ATLAS detector
... To select b-jets, a neural-network algorithm, which relies on the reconstruction of secondary vertices and impact parame- ter information in the three spatial dimensions, is used. The reconstruction of the secondary ...
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Search for resonances decaying into top quark pairs using fully hadronic decays in pp collisions with ATLAS at root s=7 TeV
... Two specific models that predict resonances of masses m with narrow and broad decay widths Γ are considered: leptophobic topcolour Z 0 bosons with Γ/m = 1.2% [16] and Kaluza–Klein (KK) gluons from the bulk ...
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Measurement of the top quark pair production cross section with ATLAS in the single lepton channel
... This Letter describes measurements of the t t ¯ cross-section in the single lepton plus jets channel with 35 pb − 1 of data recorded by ATLAS in 2010. Taking advantage of the increased data sample, the measurement ...
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Measurements of spin correlation in top antitop quark events from proton proton collisions at s =7TeV using the ATLAS detector
... single top quark production in the s, t channel, and Wt processes) and from multijets events, where a lepton from the decay of a heavy-flavor quark appears isolated or a jet mimics an ...single ...
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Estudio del quarks top en el canal s mediante correcciones radiativas del axigluon
... del top quark fue predicha por el Modelo Est´andar como parte de la tercera familia y compa˜ nero del quark ...el top quark ha permanecido en la mira de la f´ısica de part´ıculas por ...
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Measurement of Spin Correlation in Top Antitop Quark Events and Search for Top Squark Pair Production in pp Collisions at root s=8 TeV Using the ATLAS Detector
... in the fit, here the t ¯ t cross section is fixed to its SM value [71]. In addition, a systematic uncertainty of 7% is introduced, composed of factorization and renormalization scale variation, top quark ...
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TOP IC Game
... TOP-IC GAME es una revista digital, la cual da a conocer y orienta sus estrategias hacia la industria y desarrollos de videojuegos en América Latina, con mayor enfoque hacia las compañías y desarrollos de ...
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