First measurements of the W ! ` and Z= ! `` (` = e; ) production cross sections in proton-proton collisions at p s = 7TeV are presented using data recorded by the ATLAS experiment at the LHC. The results are based on 2250 W ! ` and 179 Z= ! `` candidate events selected from a data set corresponding to an integrated luminosity of approximately 320 nb1. The measured total W and Z= -boson production cross sections times the respective leptonic branching ratios for the combined electron and muon channels are tot W BR(W ! `) = 9.96 0.23(stat) 0.50(syst) 1.10(lumi) nb and tot Z= BR(Z= ! ``) = 0:82 0:06 (stat) 0:05 (syst) 0:09 (lumi) nb (within the invariant mass window 66 < m`` < 116 GeV). The W=Z cross-section ratio is measured to be 11.7 0.9(stat) 0.4(syst). In addition, measurements of the W+ and W production cross sections and of the lepton charge asymmetry are reported. Theoretical predictions based on NNLO QCD calculations are found to agree with the measurements.

Measurement of the W → ℓν and Z/γ * → ℓℓ production cross sections in proton-proton collisions at $ \sqrt {s} = 7\;{\text{TeV}} $ with the ATLAS detector / Aad, G., Abbott, B., Abdallah, J., Abdelalim, A.A., Abdesselam, A., Abdinov, O., Abi, B., Abolins, M., Abramowicz, H., Abreu, H., Acerbi, E., Acharya, B.S., Ackers, M., Adams, D.L., Addy, T.N., Adelman, J., Aderholz, M., Adomeit, S., Adorisio, C., Adragna, P., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2010:12(2010). [10.1007/jhep12(2010)060]

Measurement of the W → ℓν and Z/γ * → ℓℓ production cross sections in proton-proton collisions at $ \sqrt {s} = 7\;{\text{TeV}} $ with the ATLAS detector

BAGNAIA, Paolo;BINI, Cesare;S. Cecco;DI DOMENICO, Antonio;DIONISI, Carlo;GAUZZI, Paolo;GENTILE, Simonetta;GIAGU, Stefano;M. Kado;LACAVA, Francesco;LUCI, Claudio;MESSINA, Andrea;A. Policicchio;SOLFAROLI CAMILLOCCI, ELENA;VERDUCCI, MONICA;
2010

Abstract

First measurements of the W ! ` and Z= ! `` (` = e; ) production cross sections in proton-proton collisions at p s = 7TeV are presented using data recorded by the ATLAS experiment at the LHC. The results are based on 2250 W ! ` and 179 Z= ! `` candidate events selected from a data set corresponding to an integrated luminosity of approximately 320 nb1. The measured total W and Z= -boson production cross sections times the respective leptonic branching ratios for the combined electron and muon channels are tot W BR(W ! `) = 9.96 0.23(stat) 0.50(syst) 1.10(lumi) nb and tot Z= BR(Z= ! ``) = 0:82 0:06 (stat) 0:05 (syst) 0:09 (lumi) nb (within the invariant mass window 66 < m`` < 116 GeV). The W=Z cross-section ratio is measured to be 11.7 0.9(stat) 0.4(syst). In addition, measurements of the W+ and W production cross sections and of the lepton charge asymmetry are reported. Theoretical predictions based on NNLO QCD calculations are found to agree with the measurements.
2010
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the W → ℓν and Z/γ * → ℓℓ production cross sections in proton-proton collisions at $ \sqrt {s} = 7\;{\text{TeV}} $ with the ATLAS detector / Aad, G., Abbott, B., Abdallah, J., Abdelalim, A.A., Abdesselam, A., Abdinov, O., Abi, B., Abolins, M., Abramowicz, H., Abreu, H., Acerbi, E., Acharya, B.S., Ackers, M., Adams, D.L., Addy, T.N., Adelman, J., Aderholz, M., Adomeit, S., Adorisio, C., Adragna, P., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2010:12(2010). [10.1007/jhep12(2010)060]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/401623
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