Measurement of the W → ℓν and Z/γ → ℓℓ production cross sections in proton-proton collisions at with the ATLAS detector

First measurements of the W → ℓ ν and Z / γ * → ℓℓ (ℓ = e, μ ) production cross sections in proton-proton collisions at are presented using data recorded by the ATLAS experiment at the LHC. The results are based on 2250 W → ℓ ν and 179 Z/γ * → ℓℓ candidate events selected from a data set correspondi...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	The journal of high energy physics 2010-12, Vol.2010 (12)
Hauptverfasser:	Abdelalim, A. A., Ahles, F., Alexopoulos, T., Aliyev, M., Amorim, A., Avolio, G., Banfi, D., Beckingham, M., Behar Harpaz, S., Beringer, J., Bock, R., Bouhova-Thacker, E. V., Boveia, A., Bunse, M., Campanelli, M., Correard, S., Côté, D., Courneyea, L., Czyczula, Z., Dallison, S. J., Dannheim, D., Delsart, P. A., Dennis, C., Derue, F., Dobinson, R., Egorov, K., Froeschl, R., Golling, T., Guida, A., Haber, C., Hance, M., Heim, S., Hill, D., Huegging, F., Ishikawa, A., Ji, W., Jia, J., Juranek, V., Kass, R. D., Kiyamura, H., Klinkby, E. B., Köneke, K., Koffas, T., Kopikov, S. V., Lacour, D., Ladygin, E., Lamanna, M., Lebel, C., Leger, A., Li, B., Liu, D., Mahalalel, Y., Maidantchik, C., Marchese, F., McCarthy, T. G., McMahon, T. R., Monnier, E., Moraes, A., Mueller, K., Nisius, R., Nomachi, M., Okada, S., Ouchrif, M., Parzefall, U., Petrucci, F., Phillips, P. W., Pilkington, A. D., Placakyte, R., Pleskach, A. V., Pontecorvo, L., Posch, C., Qian, W., Ratoff, P. N., Safai Tehrani, F., Sanders, M. P., Saxon, D. H., Schroers, M., Schwindling, J., Scott, W. G., Smirnova, O., Soni, N., Suhr, C., Taboada Gameiro, S., Tarrade, F., Ten Kate, H., Trefzger, T., Tseng, J.C-L., Tsybychev, D., Turecek, D., Underwood, D. G., Usai, G., Varouchas, D., Vitale, A., Walkowiak, W., Weng, Z., Wenig, S., Wicek, F., Wilkens, H. G., Yu, J., Zhu, H.
Format:	Artikel
Sprache:	eng
Schlagworte:	Classical and Quantum Gravitation Cross-sections Elementary Particles High energy physics Leptons Luminosity Particle collisions Physics Physics and Astronomy Protons Quantum Field Theories Quantum Field Theory Quantum Physics Relativity Theory String Theory
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	First measurements of the W → ℓ ν and Z / γ * → ℓℓ (ℓ = e, μ ) production cross sections in proton-proton collisions at are presented using data recorded by the ATLAS experiment at the LHC. The results are based on 2250 W → ℓ ν and 179 Z/γ * → ℓℓ candidate events selected from a data set corresponding to an integrated luminosity of approximately 320 nb. The measured total W and Z / γ ∗ -boson production cross sections times the respective leptonic branching ratios for the combined electron and muon channels are . BR( W → ℓ ν ) = 9.96 ± 0.23(stat) ± 0.50(syst) ± 1.10(lumi) nb and BR( Z / γ ∗ → ℓℓ) = 0 . 82 ± 0 . 06 (stat) ± 0 . 05 (syst) ± 0 . 09(lumi) nb (within the invariant mass window 66 < m ℓℓ < 116GeV). 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.
ISSN:	1029-8479
DOI:	10.1007/JHEP12(2010)060