| Thème(s) : |
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Physique/Physique des Hautes Energies - Expérience
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| Titre : |
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Measurement of the ppbar -> W+b+X production cross section at \sqrt{s}=1.96 TeV |
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| Auteur : |
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V.M. Abazov, U. Bassler1, G. Bernardi2, M. Besançon1, D. Brown2, J. Brown2, E. Chapon1, S. Chevalier-Thery1, F. Couderc1, A. Croc1, F. Deliot1, C. Deterre1, Y. Enari2, S. Greder3, G. Grenier4, A. Grohsjean1, Z. Hubacek1, T. Kurca4, P. Lebrun4, J. Lellouch2, D. Li2, F. Miconi3, V. Shary1, M. Titov1, B. Tuchming1, P. Verdier4, D. Vilanova1, H. Li5, G. Sajot5, J. Stark5, J.-F. Grivaz6, T. Guillemin6, M. Jaffré6, P. Pétroff6, F. Badaud7, P. Gay7, Ph. Gris7, M.- C. Cousinou8, A. Duperrin8, W. Geng8, E. Kajfasz8, S. Kermiche8, E. Nagy8, N. Osman8 |
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| Laboratoire : |
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| Résumé : |
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We present a measurement of the cross section for $W$ boson production in association with at least one {$b$-quark} jet in proton-antiproton collisions. The measurement is made using data corresponding to an integrated luminosity of 6.1\ifb recorded with the D0 detector at the Fermilab Tevatron \ppbar Collider at $\sqrt{s}=1.96$ TeV. We measure an inclusive cross section of {$\sigma(W \sim(\to\mu\nu) + b + X) = 1.04 \pm 0.05\thinspace$(stat.) $\pm 0.12 \thinspace$(syst.) pb} and $\sigma(W (\to e\nu) + b + X) = 1.00$ \pm 0.04 \thinspace$(stat.) $\pm 0.12 \thinspace$(syst.) pb in the phase space defined by $p_T^\nu > 25$ GeV, $p_T^{\text{$b$-jet}}>20$ GeV, $|\eta^{\text{$b$-jet}}|<1.1$, and a muon (electron) with $p_T^\ell>20$ GeV and $|\eta^\mu|<1.7$ ($|\eta^e|<1.1$ or $1.5<|\eta^e|<2.5$). The combined result per lepton family is $\sigma(W (\to \ell \nu) + b + X) = 1.05$ $\pm 0.12 \thinspace$(stat.+syst.) for $|\eta^\ell|<1.7$. The results are in agreement with predictions from next-to-leading order QCD calculations using \textsc{mcfm}, $\sigma(W+b)\cdot {\cal B}(W \to \ell \nu)= 1.34 ^{+0.41}_{-0.34}\thinspace(\textrm{syst.})$, and also with predictions from the \textsc{sherpa} and \textsc{madgraph} Monte Carlo event generators. |
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| Collaboration/Projet : |
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D0 |
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| Type de publication : |
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Articles dans des revues avec comité de lecture |
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Date de publication
ou d'écriture : |
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2013 |
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| Nom du périodique : |
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| Physics Letters B (Phys. Lett. B) |
| Publisher |
Elsevier |
| ISSN |
0370-2693 |
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| Volume : |
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718 |
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| Page/Article : |
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1314-1320 |
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| Identifiant local : |
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LPSC12277 |
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| Commentaire : |
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8 pages, 4 figures ; see paper for full list of authors |
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