Title: | Observation of top quark pairs produced in association with a vector boson in pp collisions at root s=8 TeV |
Authors: | Khachatryan, V Sirunyan, AM Tumasyan, A Adam, W Asilar, E Bergauer, T Brandstetter, J Brondolin, E Dragicevic, M Eroe, J Flechl, M Poyraz, D Goh, J Kim, D Kwon, E Lee, J Yu, I Juodagalvis, A Vaitkus, J Ahmed, I Ibrahim, ZA Komaragiri, JR Ryckbosch, D Ai, MABM Idris, FM Abdullah, WATW Yusli, MN Casimiro Linares, E Castilla-Valdez, H De La Cruz-Burelo, E Heredia-de La Cruz, I Hernandez-Almada, A Lopez-Fernandez, R Salva, S Sanchez-Hernandez, A Carrillo Moreno, S Vazquez Valencia, F Morelos Pineda, A Krofcheck, D Butler, PH Ahmad, A Ahmad, M Hassan, Q Hoorani, HR Sigamani, M Khan, WA Khurshid, T Shoaib, M Bialkowska, H Bluj, M Boimska, B Frueboes, T Gorski, M Kazana, M Nawrocki, K Strobbe, N Romanowska-Rybinska, K Szleper, M Zalewski, P Brona, G Bunkowski, K Byszuk, A Doroba, K Kalinowski, A Konecki, M Krolikowski, J Tytgat, M Misiura, M Olszewski, M Walczak, M Bargassa, P Silva, CBDCE Di Francesco, A Faccioli, P Ferreira Parracho, PC Gallinaro, M Leonardo, N Van Driessche, W Lloret Iglesias, L Nguyen, F Rodrigues Antunes, J Seixas, J Toldaiev, O Vadruccio, D Varela, J Vischia, P Afanasiev, S Bunin, P Yazgan, E Gavrilenko, M Golutvin, I Gorbunov, I Kamenev, A Karjavin, V Konoplyanikov, V Laney, A Malakhov, A Matveev, V Moisenz, P Zaganidis, N Palichik, V Perelygin, V Shmatov, S Shulha, S Skatchkov, N Smirnov, V Zarubin, A Golovtsov, V Ivanov, Y Kim, V Basegmez, S Kuznetsova, E Levchenko, P Murzin, V Oreshkin, V Smirnov, I Sulimov, V Uvarov, L Vavilov, S Vorobyev, A Andreev, Y Friedl, M Beluffi, C Dermenev, A Gninenko, S Golubev, N Karneyeu, A Kirsanov, M Krasnikov, N Pashenkov, A Tlisov, D Toropin, A Epshteyn, V Bondu, O Gavrilov, V Lychkovskaya, N Popov, V Pozdnyakov, I Safronov, G Spiridonov, A Vlasov, E Zhokin, A Bylinkin, A Andreev, V Brochet, S Azarkin, M Dremin, I Kirakosyan, M Leonidov, A Mesyats, G Rusakov, SV Vinogradov, A Baskakov, A Belyaev, A Boos, E Bruno, G Bunichev, V Dubinin, M Dudko, L Gribushin, A Klyukhin, V Kodolova, O Korneeva, N Lokhtin, I Myagkov, I Obraztsov, S Caudron, A Perfilov, M Savrin, V Azhgirey, I Bayshev, I Bitioukov, S Kachanov, V Kalinin, A Konstantinov, D Krychkine, V Petrov, V Ceard, L Ryutin, R Sobol, A Tourtchanovitch, L Troshin, S Tyurin, N Uzunian, A Volkov, A Adzic, P Ekmedzic, M Milosevic, J Da Silveira, GG Rekovic, V Maestre, JA Calvo, E Cerrada, M Chamizo Llatas, M Colino, N De La Cruz, B Delgado Peris, A Dominguez Vazquez, D Escalante Del Valle, A Delaere, C Fernandez Bedoya, C Fernandez Ramos, JP Flix, J Fouz, MC Garcia-Abia, P Gonzalez Lopez, O Goy Lopez, S Hernandez, JM Josa, MI Navarro De Martino, E Favart, D Perez-Calero Yzquierdo, A Puerta Pelayo, J Quintario Olmeda, A Redondo, I Romero, L Santaolalla, J Soares, MS Albajar, C de Troconiz, JF Missiroli, M Forthomme, L Moran, D Cuevas, J Fernandez Menendez, J Folgueras, S Gonzalez Caballero, I Palencia Cortezon, E Vizan Garcia, JM Cabrillo, IJ Calderon, A Castineiras De Saa, JR Fruehwirth, R Giammanco, A De Castro Manzano, P Duarte Campderros, J Fernandez, M Garcia-Ferrero, J Gomez, G Lopez Virto, A Marco, J Marco, R Martinez Rivero, C Matorras, F Hollar, J Munoz Sanchez, FJ Piedra Gomez, J Rodrigo, T Rodriguez-Marrero, AY Ruiz-Jimeno, A Scodellaro, L Vila, I Vilar Cortabitarte, R Abbaneo, D Auffray, E Jafari, A Auzinger, G Bachtis, M Baillon, P Ball, AH Barney, D Benaglia, A Bendavid, J Benhabib, L Benitez, JF Berruti, GM Jez, P Bloch, P Bocci, A Bonato, A Botta, C Breuker, H Camporesi, T Castello, R Cerminara, G Colafranceschi, S D'Alfonso, M Komm, M d'Enterria, D Dabrowski, A Daponte, V David, A De Gruttola, M De Guio, F De Roeck, A De Visscher, S Di Marco, E Dobson, M Lemaitre, V Dordevic, M Dorney, B du Pree, T Duenser, M Dupont, N Elliott-Peisert, A Franzoni, G Funk, W Gigi, D Gill, K Mertens, A Giordano, D Girone, M Glege, F Guida, R Gundacker, S Guthoff, M Hammer, J Harris, P Hegeman, J Innocente, V Nuttens, C Janot, P Kirschenmann, H Kortelainen, MJ Kousouris, K Krajczar, K Lecoq, P Lourenco, C Lucchini, MT Magini, N Malgeri, L Perrini, L Mannelli, M Martelli, A Masetti, L Meijers, F Mersi, S Meschi, E Moortgat, F Morovic, S Mulders, M Nemallapudi, MV Pin, A Neugebauer, H Orfanelli, S Orsini, L Pape, L Perez, E Peruzzi, M Petrilli, A Petrucciani, G Pfeiffer, A Piparo, D Ghete, VM Piotrzkowski, K Racz, A Rolandi, G Rovere, M Ruan, M Sakulin, H Schaefer, C Schwick, C Sharma, A Silva, P Simon, M Popov, A Sphicas, P Spiga, D Steggemann, J Stieger, B Stoye, M Takahashi, Y Treille, D Triossi, A Tsirou, A Veres, GI Quertenmont, L Wardle, N Woehri, HK Zagozdzinska, A Zeuner, WD Bertl, W Deiters, K Erdmann, W Horisberger, R Ingram, Q Kaestli, HC Selvaggi, M Kotlinski, D Langenegger, U Renker, D Rohe, T Bachmair, F Baeni, L Bianchini, L Buchmann, MA Casal, B Dissertori, G Marono, MV Dittmar, M Donega, M Eller, P Grab, C Heidegger, C Hits, D Hoss, J Kasieczka, G Lustermann, W Mangano, B Beliy, N Marionneau, M del Arbol, PMR Masciovecchio, M Meister, D Micheli, F Musella, P Nessi-Tedaldi, F Pandolfi, F Pata, J Pauss, F Hammad, GH Perrozzi, L Quittnat, M Rossini, M Starodumov, A Takahashi, M Tavolaro, VR Theofilatos, K Wallny, R Aarrestad, TK Amsler, C Aida Junior, WL Caminada, L Canelli, MF Chiochia, V De Cosa, A Galloni, C Hinzmann, A Hreus, T Kilminster, B Lange, C Ngadiuba, J Alves, GA Pinna, D Robmann, P Ronga, FJ Salerno, D Yang, Y Cardaci, M Chen, KH Doan, TH Jain, S Khurana, R Brito, L Konyushikhin, M Kuo, CM Lin, W Lu, YJ Yu, SS Kumar, A Bartek, R Chang, P Chang, YH Chang, YW Hartl, C Correa Martins Junior, M Chao, Y Chen, KF Chen, PH Dietz, C Fiori, F Grundler, U Hou, W-S Hsiung, Y Liu, YF Lu, R-S Hamer, M Moya, MM Petrakou, E Tsai, JF Tzeng, YM Asavapibhop, B Kovitanggoon, K Singh, G Srimanobhas, N Suwonjandee, N Adiguzel, A Hensel, C Bakirci, MN Cerci, S Demiroglu, ZS Dozen, C Dumanoglu, I Eskut, E Girgis, S Gokbulut, G Guler, Y Gurpinar, E Mora Herrera, C Hos, I Kanga, EE Onengut, G Ozdemir, K Polatoz, A Cerci, DS Vergili, M Zorbilmez, C Akin, IV Bilin, B Moraes, A Bilmis, S Isildak, B Karapinar, G Yalvac, M Zeyrek, M Albayrak, EA Gulmez, E Kaya, M Kaya, O Yetkin, T Pol, ME Cankocak, K Sen, S Vardarli, FI Grynyov, B Levchuk, L Sorokin, P Aggleton, R Ball, F Beck, L Brooke, JJ Rebello Teles, P Clement, E Cussans, D Flacher, H Goldstein, J Grimes, M Heath, GP Heath, HF Jacob, J Kreczko, L Lucas, C Belchior Batista Das Chagas, E Meng, Z Newbold, DM Paramesvaran, S Poll, A Sakuma, T El Nasr-Storey, SS Senkin, S Smith, D Smith, VJ Bell, KW Carvalho, W Belyaev, A Brew, C Brown, RM Cieri, D Cockerill, DJA Coughlan, JA Harder, K Harper, S Olaiya, E Petyt, D Chinellato, J Shepherd-Themistocleous, CH Thea, A Tomalin, IR Williams, T Womersley, WJ Worm, SD Baber, M Bainbridge, R Buchmuller, O Bundock, A Hoermann, N Custodio, A Burton, D Casasso, S Citron, M Colling, D Corpe, L Cripps, N Dauncey, P Davies, G De Wit, A Della Negra, M Da Costa, EM Dunne, P Elwood, A Ferguson, W Fulcher, J Futyan, D Hall, G Iles, G Kenzie, M Lane, R Lucas, R De Jesus Damiao, D Lyons, L Magnan, A-M Malik, S Nash, J Nikitenko, A Pela, J Pesaresi, M Petridis, K Raymond, DM Richards, A De Oliveira Martins, C Rose, A Seez, C Tapper, A Uchida, K Acosta, MV Virdee, T Zenz, SC Cole, JE Hobson, PR Khan, A Fonseca De Souza, S Kyberd, P Leggat, D Leslie, D Reid, ID Symonds, P Teodorescu, L Turner, M Borzou, A Call, K Dittmann, J Huertas Guativa, LM Hatakeyama, K Kasmi, A Liu, H Pastika, N Charaf, O Cooper, SI Henderson, C Rumerio, P Avetisyan, A Bose, T Malbouisson, H Fantasia, C Gastler, D Lawson, P Rankin, D Richardson, C Rohlf, J John, JS Sulak, L Zou, D Alimena, J Matos Figueiredo, D Berry, E Bhattacharya, S Cutts, D Dhingra, N Ferapontov, A Garabedian, A Hakala, J Heintz, U Laird, E Landsberg, G Mundim, L Mao, Z Narain, M Piperov, S Sagir, S Sinthuprasith, T Syarif, R Breedon, R Breto, G Sanchez, MCDLB Chauhan, S Nogima, H Chertok, M Conway, J Conway, R Cox, PT Erbacher, R Gardner, M Ko, W Lander, R Mulhearn, M Pellett, D Hrubec, J Prado Da Silva, WL Pilot, J Ricci-Tam, F Shalhout, S Smith, J Squires, M Stolp, D Tripathi, M Wilbur, S Yohay, R Cousins, R Santoro, A Everaerts, P Farrell, C Hauser, J Ignatenko, M Saltzberg, D Takasugi, E Valuev, V Weber, M Burt, K Clare, R Sznajder, A Ellison, J Gary, JW Hanson, G Heilman, J Paneva, MI Jandir, P Kennedy, E Lacroix, F Long, OR Luthra, A Tonelli Manganote, EJ Malberti, M Negrete, MO Shrinivas, A Wei, H Wimpenny, S Yates, BR Branson, JG Cerati, GB Cittolin, S D'Agnolo, RT Vilela Pereira, A Holzner, A Kelley, R Klein, D Letts, J Macneill, I Olivito, D Padhi, S Pieri, M Sani, M Sharma, V Ahuja, S Simon, S Tadel, M Vartak, A Wasserbaech, S Welke, C Wuerthwein, F Yagil, A Della Porta, GZ Barge, D Bradmiller-Feld, J Bernardes, CA Campagnari, C Dishaw, A Dutta, V Flowers, K Sevilla, MF Geffert, P George, C Golf, F Gouskos, L Gran, J De Souza Santos, A Incandela, J Justus, C Mccoll, N Mullin, SD Richman, J Stuart, D Suarez, I To, W West, C Yoo, J Dogra, S Anderson, D Apresyan, A Bornheim, A 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Keywords: | Electroweak interaction;Hadron-Hadron scattering;Top physics |
Issue Date: | 2016 |
Publisher: | Springer Berlin Heidelberg |
Citation: | Journal of High Energy Physics, 2016:96, (2016) |
Abstract: | Measurements of the cross sections for top quark pairs produced in association with a W or Z boson are presented, using 8 TeV pp collision data corresponding to an integrated luminosity of 19.5 fb−1, collected by the CMS experiment at the LHC. Final states are selected in which the associated W boson decays to a charged lepton and a neutrino or the Z boson decays to two charged leptons. Signal events are identified by matching reconstructed objects in the detector to specific final state particles from tt ¯ W or tt¯Z decays. The tt ¯ W cross section is measured to be 382 − 102 + 117 fb with a significance of 4.8 standard deviations from the background-only hypothesis. The tt¯Z cross section is measured to be 242 − 55 + 65 fb with a significance of 6.4 standard deviations from the background-only hypothesis. These measurements are used to set bounds on five anomalous dimension-six operators that would affect the tt¯W and tt ¯ Z cross sections. |
URI: | http://link.springer.com/article/10.1007%2FJHEP01%282016%29096 http://bura.brunel.ac.uk/handle/2438/12411 |
DOI: | http://dx.doi.org/10.1007/JHEP01(2016)096 |
ISSN: | 1029-8479 |
Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers
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