Details

Autor(en) / Beteiligte

• Allport, P. P.
• Balli, F.
• Bannoura, A. A. E.
• Bellagamba, L.
• Beretta, M.
• Bernard, N. R.
• Blair, R. E.
• Bos, K.
• Cakir, O.
• Camarri, P.
• Clark, B. L.
• Conventi, F.
• Cooke, M.
• Corradi, M.
• Cree, G.
• Crépé-Renaudin, S.
• Dallaire, F.
• Davison, P.
• della Volpe, D.
• Delsart, P. A.
• DeMarco, D. A.
• Di Girolamo, A.
• Dita, S.
• Duchovni, E.
• Francis, D.
• Freeborn, D.
• Gaycken, G.
• Gerbaudo, D.
• Goujdami, D.
• Grefe, C.
• Guyot, C.
• Hanawa, K.
• Hirose, M.
• Hong, T. M.
• Hrynevich, A.
• Izzo, V.
• Jackson, M.
• Janus, M.
• Kaplan, L. S.
• Katre, A.
• Kersten, S.
• Khoo, T. J.
• Kiss, F.
• Kohlmann, S.
• Konoplich, R.
• Lari, T.
• Lee, C. A.
• Lefebvre, G.
• Leyton, M.
• Lister, A.
• Lleres, A.
• Love, J.
• Lukas, W.
• Mahlstedt, J.
• Mallik, U.
• Maneira, J.
• Marley, D. E.
• Marshall, Z.
• Mättig, P.
• Mazza, S. M.
• Medinnis, M.
• Mehta, A.
• Narayan, R.
• Narrias Villar, D. I.
• Neubauer, M. S.
• Palka, M.
• Peshekhonov, V. D.
• Piccaro, E.
• Poggioli, L.
• Polesello, G.
• Poley, A.
• Pueschel, E.
• Rudolph, C.
• Schune, Ph
• Schwindt, T.
• Seiden, A.
• Simion, S.
• Smirnov, S. Yu
• Sorin, V.
• Spousta, M.
• Stark, J.
• Stradling, A. R.
• Styles, N. A.
• Ticse Torres, R. E.
• Tsirintanis, N.
• Tykhonov, A.
• Usanova, A.
• van Gemmeren, P.
• Van Nieuwkoop, J.
• van Woerden, M. C.
• Vickey, T.
• Vranjes, N.
• Vreeswijk, M.
• Wakabayashi, J.
• Winklmeier, F.
• Yang, H.
• Youssef, S.
• Yusuff, I.
• Zhang, J.
• Zhang, Z.

Titel

Measurements of fiducial cross-sections for tt¯ production with one or two additional b-jets in pp collisions at s=8 TeV using the ATLAS detector

Ist Teil von

• The European physical journal. C, Particles and fields, 2016, Vol.76 (1)

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2016

Link zum Volltext

Quelle

SpringerLink (Online service)

Beschreibungen/Notizen

• Fiducial cross-sections for t t ¯ production with one or two additional b -jets are reported, using an integrated luminosity of 20.3 fb - 1 of proton–proton collisions at a centre-of-mass energy of 8 TeV at the Large Hadron Collider, collected with the ATLAS detector. The cross-section times branching ratio for t t ¯ events with at least one additional b -jet is measured to be 950 ± 70 (stat.) - 190 + 240  (syst.) fb in the lepton-plus-jets channel and 50 ± 10 (stat.) - 10 + 15  (syst.) fb in the e μ channel. The cross-section times branching ratio for events with at least two additional b -jets is measured to be 19.3 ± 3.5 (stat.) ± 5.7 (syst.) fb in the dilepton channel ( e μ ,  μ μ , and   ee ) using a method based on tight selection criteria, and 13.5 ± 3.3 (stat.)  ± 3.6 (syst.) fb using a looser selection that allows the background normalisation to be extracted from data. The latter method also measures a value of 1.30 ± 0.33 (stat.) ± 0.28 (syst.)% for the ratio of t t ¯ production with two additional b -jets to t t ¯ production with any two additional jets. All measurements are in good agreement with recent theory predictions.