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| 題名: | Measurement of the t̄t production cross section in the all-jet final state in pp collisions at √s=7 TeV |
| 作者: | 林宗泰;Chatrchyan, S.;Bansal, M.;Cornelis, T.;Walsh, S.;Giammanco, A.;Pol, M. E.;Mercadante, P. G.;Asawatangtrakuldee, C.;Antunovic, Z.;Morovic, S.;Mousa, J.;Kadastik, M.;Karjalainen, A.;Agram, J.-L.;Chasserat, J.;Kreuzer, P.;Papacz, P.;Reithler, H.;Aldaya Martin, M.;Hauk, J.;Kasemann, M.;Spiridonov, A.;Komaragiri, J. R.;Hidas, P.;Horvath, D.;Dhingra, N.;Sharma, V.;Shukla, P.;Etesami, S. M.;Chhibra, S. S.;Ciulli, V.;Di Matteo, L.;Martelli, A.;Lista, L.;Simonetto, F.;Ratti, S. P.;Tenchini, R.;Soffi, L.;Demaria, N.;Potenza, A.;Kim, T. Y.;Kim, H.;Kim, T. J.;Khurshid, T.;Romanowska-Rybinska, K.;Karjavin, V.;Smirnov, I.;Vavilov, S.;Leonidov, A.;Savrin, V.;Krychkine, V.;Sobol, A.;Delgado Peris, A.;Duarte Campderros, J.;Gonzalez Sanchez, J.;Munoz Sanchez, F. J.;Rodrigo, T.;Innocente, V.;Lenzi, P.;Mäki, T.;Pierini, M.;Rovere, M.;Horisberger, R.;Kaestli, H. C.;Sibille, J.;Dittmar, M.;Nägeli, C.;Amsler, C.;Verzetti, M.;Vergili, L. N.;Ozpineci, A.;Cripps, N.;Nikitenko, A.;Pioppi, M.;Reid, I. D.;Turner, M.;Segala, M.;Rutherford, B.;Evans, D.;Koay, S. A.;Wilkinson, R.;Paulini, M.;Vorobiev, I.;Smith, J. G.;Gao, Y.;Newman-Holmes, C.;Sexton-Kennedy, E.;Uplegger, L.;Rinkevicius, A.;Newsom, C. R.;Gronberg, J.;Hahn, K. A.;Perera, L.;Bose, S.;Williams, G.;Raval, A.;De Mattia, M.;Guragain, S.;Akchurin, N.;Delannoy, A. G. |
| 貢獻者: | 理學院物理學系 |
| 日期: | 2013-01-01 |
| 上傳時間: | 2026-04-23 12:20:43 (UTC+8) |
| 出版者: | United States: Springer Science and Business Media LLC |
| 摘要: | 摘要： AbstractA measurement is presented of the <jats:inline-formula>$ \mathrm{t}\overline{\mathrm{t}} $</jats:inline-formula> production cross section <jats:inline-formula>$ \left( {{\sigma_{{\mathrm{t}\overline{\mathrm{t}}} \right) $</jats:inline-formula> in proton-proton collisions at a centre-of-mass energy of 7 TeV, in the all-jet final state that contains at least six jets, two of which are tagged as originating from b quarks. The data correspond to an integrated luminosity of 3.54 fb−1, collected with the CMS detector at the LHC. The cross section is determined through an unbinned maximum likelihood fit of background and <jats:inline-formula>$ \mathrm{t}\overline{\mathrm{t}} $</jats:inline-formula> signal to the reconstructed mass spectrum of <jats:inline-formula>$ \mathrm{t}\overline{\mathrm{t}} $</jats:inline-formula> candidates in the data, in which events are subjected to a kinematic fit assuming a <jats:inline-formula>$ \mathrm{t}\overline{\mathrm{t}}\to {{\mathrm{W}}^{+}}\mathrm{b}{{\mathrm{W}}^{-}}\overline{\mathrm{b}}\to 6 $</jats:inline-formula> jets hypothesis. The measurement yields <jats:inline-formula>$ {\sigma_{{\mathrm{t}\overline{\mathrm{t}}}=139\pm 10\;\left( {\mathrm{stat}.} \right)\pm 26\;\left( {\mathrm{syst}.} \right)\pm 3\left( {\mathrm{lum}.} \right)\;\mathrm{pb} $</jats:inline-formula>, a result consistent with those obtained in other <jats:inline-formula>$ \mathrm{t}\overline{\mathrm{t}} $</jats:inline-formula> decay channels, as well as with predictions of the standard model.
出版者： United States: Springer Science and Business Media LLC
出版日期： 2013-05
出處： Journal of High Energy Physics, 2013-05, Vol.2013 (5), Article 65
資源來源： Publicly Available Content Database
識別號： ISSN: 1029-8479
識別號： ISSN: 1126-6708
識別號： ISSN: 1127-2236
識別號： EISSN: 1029-8479
識別號： DOI: 10.1007/jhep05(2013)065 |
| 顯示於類別: | [物理學系] 期刊論文
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