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| 題名: | Measurements of t t ̄ spin correlations and top-quark polarization using dilepton final states in pp collisions at s =7TeV |
| 作者: | 林宗泰;Chatrchyan, S;Tumasyan, A;Frühwirth, R;Jeitler, M;Knünz, V;Clerbaux, B;Gay, A P R;Reis, T;Thyssen, F;Da Silveira, G G;thomme, L;Jez, P;Caebergs, T;De Jesus Damiao, D;Lagana, C;Piperov, S;Hadjiiska, R;Liang, D;Tikvica, L;Tuominiemi, J;Gras, P;Beaudette, F;Busson, P;Mironov, C;Olschewski, M;Schmitz, S A;Thüer, S;Haj Ahmad, W;Bell, A J;Calligaris, L;Riedl, C;Garutti, E;Butz, E;Held, H;Rabbertz, K;Schott, G;Wagner-Kuhr, J;Vesztergombi, G;Ujvari, B;Dhingra, N;Bhattacharya, S;Ganguly, S;Guchait, M;Maity, M;Montanari, A;Costa, S;Lucchini, M T;Pacher, L;Romero, A;Lee, J;Salazar Ibarguen, H A;Krofcheck, D;Reucroft, S;Hoorani, H R;Brona, G;Gorbunov, I;Bunichev, V;Klyukhin, V;Fernandez, M;Martinez Rivero, C;Vila, I;Bondu, O;D'Alfonso, M;David, A;Petrilli, A;Pfeiffer, A;Pierini, M;Plagge, M;Majumder, D;Tzeng, Y M;Kayis Topaksu, A;Serin, M;Cankocak, K;Bainbridge, R;Futyan, D;Pesaresi, M;Sparrow, A;Christopher, G;Newman, H B;Thom, J;Beretvas, A;Hare, D;Joshi, U;Nahn, S;Uplegger, L;Kypreos, T;Baarmand, M M;Bilki, B;Mestvirishvili, A;Wetzel, J;Sekaric, J;Kolberg, T;Dahmes, B;Klapoetke, K;Pozdnyakov, A;Elmer, P;Alagoz, E;Kress, M;Park, M;Grothe, M |
| 貢獻者: | 理學院物理學系 |
| 日期: | 2014-05-05 |
| 上傳時間: | 2026-04-23 12:27:48 (UTC+8) |
| 摘要: | 摘要： Spin correlations and polarization in the top quark-antiquark system are measured using dilepton final states produced in pp collisions at the LHC at sqrt[s]=7 TeV. The data correspond to an integrated luminosity of 5.0 fb(-1) collected with the CMS detector. The measurements are performed using events with two oppositely charged leptons (electrons or muons), a significant imbalance in transverse momentum, and two or more jets, where at least one of the jets is identified as originating from a b quark. The spin correlations and polarization are measured through asymmetries in angular distributions of the two selected leptons, unfolded to the parton level. All measurements are found to be in agreement with predictions of the standard model.Spin correlations and polarization in the top quark-antiquark system are measured using dilepton final states produced in pp collisions at the LHC at sqrt[s]=7 TeV. The data correspond to an integrated luminosity of 5.0 fb(-1) collected with the CMS detector. The measurements are performed using events with two oppositely charged leptons (electrons or muons), a significant imbalance in transverse momentum, and two or more jets, where at least one of the jets is identified as originating from a b quark. The spin correlations and polarization are measured through asymmetries in angular distributions of the two selected leptons, unfolded to the parton level. All measurements are found to be in agreement with predictions of the standard model.
出版日期： 2014-05-09
出處： Physical review letters, 2014-05, Vol.112 (18), p.182001
資源來源： American Physical Society Journals
識別號： ISSN: 1079-7114
識別號： EISSN: 1079-7114
識別號： DOI: 10.1103/PhysRevLett.112.182001 |
| 顯示於類別: | [物理學系] 期刊論文
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