Measurement of the $\ttbar$ Production Cross Section in 2 Fb$^{-1}$ of $\ppbar$ Collisions at $\sqrt{s} PDF Download
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Languages : en
Pages : 53
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We present a measurement of the t{bar t} production cross section in p{bar p} collisions at (square root)s = 1.96 TeV using events containing a high transverse momentum electron or muon, three or more jets, and missing transverse energy. Events consistent with t{bar t} decay are found by identifying jets containing candidate heavy-flavor semileptonic decays to muons. The measurement uses a CDF Run II data sample corresponding to 2 fb−1 of integrated luminosity. Based on 248 candidate events with three or more jets and an expected background of 79.5 ± 5.3 events, we measure a production cross section of 9.1 ± 1.6 pb.
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Languages : en
Pages : 53
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Book Description
We present a measurement of the t{bar t} production cross section in p{bar p} collisions at (square root)s = 1.96 TeV using events containing a high transverse momentum electron or muon, three or more jets, and missing transverse energy. Events consistent with t{bar t} decay are found by identifying jets containing candidate heavy-flavor semileptonic decays to muons. The measurement uses a CDF Run II data sample corresponding to 2 fb−1 of integrated luminosity. Based on 248 candidate events with three or more jets and an expected background of 79.5 ± 5.3 events, we measure a production cross section of 9.1 ± 1.6 pb.
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Languages : en
Pages : 34
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The cross section for tt production in the all-jets final state is measured in pp collisions at a centre-of-mass energy of 8 TeV at the LHC with the CMS detector, in data corresponding to an integrated luminosity of 18.4 fb-1. The inclusive cross section is found to be 275.6 ±6.1 (stat) ± 37.8 (syst) ± 7.2 (lumi) pb. The normalized differential cross sections are measured as a function of the top quark transverse momenta, pT, and compared to predictions from quantum chromodynamics. The results are reported at detector, parton, and particle levels. In all cases, the measured top quark pT spectra are significantly softer than theoretical predictions.
![Measurement of the Ttbar Production Cross Section in Ppbar Collisions at [squareroot]s PDF](https://books.google.com/books/content/images/frontcover/p08WtwAACAAJ?fife=w80-h100)
Author: Salvatore Rocco Rappoccio
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Category : Particles (Nuclear physics)
Languages : en
Pages : 688
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Category :
Languages : en
Pages : 32
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Author:
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Category :
Languages : en
Pages :
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Normalized double-differential cross sections for top quark pair (ttbar) production are measured in pp collisions at a centre-of-mass energy of 8 TeV with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 19.7 inverse femtobarns. The measurement is performed in the dilepton e+/- mu-/+ final state. The ttbar cross section is determined as a function of various pairs of observables characterizing the kinematics of the top quark and ttbar system. The data are compared to calculations using perturbative quantum chromodynamics at next-to-leading and approximate next-to-next-to-leading orders. They are also compared to predictions of Monte Carlo event generators that complement fixed-order computations with parton showers, hadronization, and multiple-parton interactions. Overall agreement is observed with the predictions, which is improved when the latest global sets of proton parton distribution functions are used. The inclusion of the measured ttbar cross sections in a fit of parametrized parton distribution functions is shown to have significant impact on the gluon distribution.
![Measurement of the Tt, WW and Z -- [tau Tau] Production Cross Sections in Pp Collisions at [square Root of S] PDF](https://books.google.com/books/content/images/frontcover/jd9NNwAACAAJ?fife=w80-h100)
Author: Sebastian Carron Montero
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ISBN:
Category : Cross sections (Nuclear physics)
Languages : en
Pages : 366
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Category :
Languages : en
Pages : 31
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![Measurements of the Tt̄ Production Cross Section at [square Root Symbol] PDF](https://books.google.com/books/content/images/frontcover/kkFHzgEACAAJ?fife=w80-h100)
Author: Joseph Francis Kozminski
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ISBN:
Category : Cross sections (Nuclear physics)
Languages : en
Pages : 392
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Category :
Languages : en
Pages : 30
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![Measurement of Top Pair Production Cross Section in Electron + Jets Channel in Ppbar Collisions at [square Root Of] S PDF](https://books.google.com/books/content/images/frontcover/7AceAQAAMAAJ?fife=w80-h100)
Author: Chunhui Han
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ISBN:
Category : Physics
Languages : en
Pages : 298
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