Title: | Measurements of t(t)over-bar Spin Correlations and Top-Quark Polarization Using Dilepton Final States in pp Collisions at root s=7 TeV |
Authors: | Chatrchyan, S Khachatryan, V Sirunyan, AM Tumasyan, A Adam, W Bergauer, T Dragicevic, M Eroe, J Fabjan, C Friedl, M Fruehwirth, R Tyurin, N Lee, Y-J Levin, A Luckey, PD Ma, T Paus, C Ralph, D Roland, C Roland, G Stephans, GSF Kraetschmer, I Uzunian, A Wang, Z Stoeckli, F Sumorok, K Velicanu, D Veverka, J Wyslouch, B Yang, M Yoon, AS Zanetti, M Zhukova, V Volkov, A Dahmes, B Asawatangtrakuldee, C De Benedetti, A Gude, A Kao, SC Klapoetke, K Kubota, Y Mans, J Pastika, N Rusack, R Adzic, P Singovsky, A Tambe, N Ban, Y Turkewitz, J Acosta, JG Cremaldi, LM Kroeger, R Oliveros, S Perera, L Rahmat, R Djordjevic, M Sanders, DA Summers, D Avdeeva, E Guo, Y Bloom, K Bose, S Claes, DR Dominguez, A Suarez, RG Keller, J Ekmedzic, M Kravchenko, I Lazo-Flores, J Malik, S Meier, F Li, Q Snow, GR Dolen, J Godshalk, A Iashvili, I Jain, S Milosevic, J Kharchilava, A Kumar, A Rappoccio, S Wan, Z Alverson, G Li, W Barberis, E Baumgartel, D Chasco, M Haley, J Aguilar-Benitez, M Massironi, A Nash, D Orimoto, T Trocino, D Wood, D Zhang, J Liu, S Anastassov, A Hahn, KA Kubik, A Alcaraz Maestre, J Lusito, L Mucia, N Odell, N Pollack, B Pozdnyakov, A Schmitt, M Stoynev, S Mao, Y Sung, K Velasco, M Battilana, C Won, S Berry, D Brinkerhoff, A Chan, KM Drozdetskiy, A Hildreth, M Jessop, C Karmgard, DJ Qian, SJ Kolb, J Zaganidis, N du Pree, T Lannon, K Luo, W Lynch, S Marinelli, N Morse, DM Pearson, T Planer, M Ruchti, R Slaunwhite, J Wang, D Calvo, E Valls, N Wayne, M Wolf, M Antonelli, L Bylsma, B Durkin, LS Flowers, S Hill, C Hughes, R Kotov, K Cerrada, M Liko, D Zhang, L Ling, TY Puigh, D Rodenburg, M Smith, G Vuosalo, C Winer, BL Wolfe, H Wulsin, HW Chamizo Llatas, M Berry, E Elmer, P Zou, W Halyo, V Hebda, P Hegeman, J Hunt, A Jindal, P Koay, SA Lujan, P Colino, N Marlow, D Medvedeva, T Mooney, M Avila, C Olsen, J Piroue, P Quan, X Raval, A Saka, H Stickland, D De la Cruz, B Tully, C Werner, JS Zenz, SC Zuranski, A Carrillo Montoya, CA Brownson, E Lopez, A Mendez, H Vargas, JER Alagoz, E Delgado Peris, A Benedetti, D Bolla, G Bortoletto, D De Mattia, M Everett, A Chaparro Sierra, LF Hu, Z Jones, M Jung, K Kress, M Dominguez Vazquez, D Leonardo, N Pegna, DL Maroussov, V Merkel, P Miller, DH Neumeister, N Florez, C Radburn-Smith, BC Shipsey, I Silvers, D Fernandez Bedoya, C Svyatkovskiy, A Wang, F Xie, W Xu, L Yoo, HD Zablocki, J Zheng, Y Gomez, JP Parashar, N Adair, A Fernandez Ramos, JP Akgun, B Ecklund, KM Geurts, FJM Li, W Michlin, B Padley, BP Redjimi, R Roberts, J Gomez Moreno, B Zabel, J Golutvin, I Ferrando, A Betchart, B Bodek, A Covarelli, R de Barbaro, P Demina, R Eshaq, Y Ferbel, T Garcia-Bellido, A Goldenzweig, P Sanabria, JC Ghete, VM Han, J Harel, A Miner, DC Petrillo, G Vishnevskiy, D Zielinski, M Bhatti, A Ciesielski, R Demortier, L Goulianos, K Favart, D Godinovic, N Lungu, G Malik, S Mesropian, C Arora, S Barker, A Chou, JP Contreras-Campana, C Contreras-Campana, E Duggan, D Flix, J Ferencek, D Mikulec, I Lelas, D Gershtein, Y Gray, R Halkiadakis, E Hidas, D Lath, A Panwalkar, S Park, M Fouz, MC Patel, R Rekovic, V Robles, J Polic, D Salur, S Schnetzer, S Seitz, C Somalwar, S Stone, R Thomas, S Garcia-Abia, P Thomassen, P Walker, M Rose, K Spanier, S Puljak, I Yang, ZC York, A Bouhali, O Eusebi, R Flanagan, W Gonzalez Lopez, O Gilmore, J Kamon, T Khotilovich, V Krutelyov, V Montalvo, R Antunovic, Z Osipenkov, I Pakhotin, Y Perloff, A Roe, J Goy Lopez, S Safonov, A Sakuma, T Suarez, I Tatarinov, A Toback, D Akchurin, N Kovac, M Cowden, C Damgov, J Dragoiu, C Hernandez, JM Dudero, PR Kovitanggoon, K Kunori, S Lee, SW Libeiro, T Volobouev, I Appelt, E Brigljevic, V Delannoy, AG Greene, S Josa, MI Gurrola, A Johns, W Maguire, C Mao, Y Melo, A Sharma, M Sheldon, P Snook, B Kadija, K Tuo, S Gorbunov, I Merino, G Velkovska, J Arenton, MW Boutle, S Cox, B Francis, B Goodell, J Hirosky, R Ledovskoy, A Lin, C Luetic, J Navarro De Martino, E Neu, C Wood, J Gollapinni, S Harr, R Karchin, PE Don, CKK Lamichhane, P Sakharov, A Belknap, DA Borrello, L Puerta Pelayo, J Mekterovic, D Carlsmith, D Cepeda, M Dasu, S Duric, S Friis, E Grothe, M Hall-Wilton, R Herndon, M Herve, A Forthomme, L Klabbers, P Morovic, S Klukas, J Lanaro, A Loveless, R Mohapatra, A Ojalvo, I Perry, T Pierro, GA Polese, G Quintario Olmeda, A Ross, I Sarangi, T Rabady, D Tikvica, L Savin, A Smith, WH Attikis, A Mavromanolakis, G Mousa, J Nicolaou, C Redondo, I Ptochos, F Razis, PA Finger, M Finger, M Abdelalim, AA Rahbaran, B Assran, Y Elgammal, S Kamel, AE Mahmoud, MA Romero, L Radi, A Kadastik, M Muentel, M Murumaa, M Raidal, M Rebane, L Rohringer, H Tiko, A Eerola, P Fedi, G Soares, MS Voutilainen, M Harkonen, J Karimaki, V Kinnunen, R Kortelainen, MJ Lampen, T Lassila-Perini, K Schoefbeck, R Lehti, S Linden, T Willmott, C Luukka, P Maenpaa, T Peltola, T Tuominen, E Tuominiemi, J Tuovinen, E Wendland, L Tuuva, T Strauss, J Besancon, M Albajar, C Couderc, F Dejardin, M Denegri, D Fabbro, B Faure, JL Ferri, F Ganjour, S Givernaud, A Gras, P Taurok, A Kamenev, A De Troconiz, JF de Monchenault, GH Jarry, P Locci, E Malcles, J Nayak, A Rander, J Rosowsky, A Titov, M Baffioni, S Beaudette, F Brun, H Treberer-Treberspurg, W Busson, P Charlot, C Daci, N Dahms, T Dalchenko, M Dobrzynski, L Florent, A de Cassagnac, RG Haguenauer, M Cuevas, J Mine, P Waltenberger, W Mironov, C Naranjo, IN Nguyen, M Ochando, C Paganini, P Sabes, D Salerno, R Sirois, Y Fernandez Menendez, J Veelken, C Yilmaz, Y Wulz, C-E Zabi, A Agram, J-L Andrea, J Bloch, D Brom, J-M Chabert, EC Collard, C Giammanco, A Conte, E Drouhin, F Fontaine, J-C Mossolov, V Gele, D Goerlach, U Goetzmann, C Juillot, P Le Bihan, A-C Van Hove, P Folgueras, S Gadrat, S Beauceron, S Beaupere, N Boudoul, G Shumeiko, N Brochet, S Chasserat, J Chierici, R Contardo, D Depasse, P Gonzalez Caballero, I El Mamouni, H Fan, J Fay, J Gascon, S Gouzevitch, M Gonzalez, JS Ille, B Kurca, T Lethuillier, M Mirabito, L Lloret Iglesias, L Perries, S Alvarez, JDR Sgandurra, L Sordini, V Donckt, MV Verdier, P Alderweireldt, S Viret, S Xiao, H Tsamalaidze, Z Brochero Cifuentes, JA Autermann, C Beranek, S Bontenackels, M Calpas, B Edelhoff, M Feld, L Hindrichs, O Bansal, M Klein, K Ostapchuk, A Cabrillo, IJ Perieanu, A Raupach, F Sammet, J Schael, S Sprenger, D Weber, H Wittmer, B Zhukov, V Bansal, S Ata, M Karjavin, V Calderon, A Caudron, J Dietz-Laursonn, E Duchardt, D Erdmann, M Fischer, R Gueth, A Hebbeker, T Heidemann, C Hoepfner, K Cornelis, T Chuang, SH Klingebiel, D Knutzen, S Kreuzer, P Merschmeyer, M Meyer, A Olschewski, M Padeken, K Papacz, P Reithler, H Schmitz, SA Duarte Campderros, J De Wolf, EA Sonnenschein, L Teyssier, D Thueer, S Weber, M Cherepanov, V Erdogan, Y Fluegge, G Geenen, H Geisler, M Fernandez, M Ahmad, WH Janssen, X Hoehle, F Kargoll, B Kress, T Kuessel, Y Lingemann, J Nowack, A Nugent, IM Perchalla, L Gomez, G Pooth, O Stahl, A Knutsson, A Asin, I Bartosik, N Behr, J Behrenhoff, W Behrens, U Bell, AJ Bergholz, M Hollar, J Bethani, A Borras, K 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Keywords: | tt¯ Spin correlations;Top-Quark polarization;Dilepton final states;pp collisions |
Issue Date: | 2014 |
Publisher: | American Physical Society |
Citation: | Physical Review Letters, 112(18): ARTN 182001, 2014 |
Abstract: | Spin correlations and polarization in the top quark–antiquark system are measured using dilepton final states produced in pp collisions at the LHC at 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. |
Description: | Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. |
URI: | http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.112.182001 http://bura.brunel.ac.uk/handle/2438/9248 |
DOI: | http://dx.doi.org/10.1103/PhysRevLett.112.182001 |
ISSN: | 0031-9007 |
Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers
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