| Title: | Observation of the associated production of a single top quark and a W Boson in pp collisions at s=8 TeV. |
| Authors: | Chatrchyan, S Khachatryan, V Sirunyan, AM Tumasyan, A Adam, W Bergauer, T Dragicevic, M Erö, J Fabjan, C Friedl, M Frühwirth, R Yazgan, E Gorbunov, I Kamenev, A Karjavin, V Konoplyanikov, V Kozlov, G Lanev, A Malakhov, A Matveev, V Moisenz, P Palichik, V Zaganidis, N Perelygin, V Shmatov, S Skatchkov, N Smirnov, V Zarubin, A Golovtsov, V Ivanov, Y Kim, V Levchenko, P Murzin, V Basegmez, S Oreshkin, V Smirnov, I Sulimov, V Uvarov, L Vavilov, S Vorobyev, A Vorobyev, A Andreev, Y Dermenev, A Gninenko, S Beluffi, C Golubev, N Kirsanov, M Krasnikov, N Pashenkov, A Tlisov, D Toropin, A Epshteyn, V Gavrilov, V Lychkovskaya, N Popov, V Bruno, G Safronov, G Semenov, S Spiridonov, A Stolin, V Vlasov, E Zhokin, A Andreev, V Azarkin, M Dremin, I Kirakosyan, M Castello, R Leonidov, A Mesyats, G Rusakov, SV Vinogradov, A Belyaev, A Boos, E Bunichev, V Dubinin, M Dudko, L Gribushin, A Caudron, A Klyukhin, V Lokhtin, I Obraztsov, S Perfilov, M Savrin, V Snigirev, A Tsirova, N Azhgirey, I Bayshev, I Bitioukov, S Ceard, L Kachanov, V Kalinin, A Konstantinov, D Krychkine, V Petrov, V Ryutin, R Sobol, A Tourtchanovitch, L Troshin, S Tyurin, N Da Silveira, GG Uzunian, A Volkov, A Adzic, P Djordjevic, M Ekmedzic, M Milosevic, J Aguilar-Benitez, M Alcaraz Maestre, J Battilana, C Calvo, E Delaere, C Cerrada, M Chamizo Llatas, M Colino, N De La Cruz, B Delgado Peris, A Domínguez Vázquez, D Fernandez Bedoya, C Fernández Ramos, JP Ferrando, A Flix, J Ghete, VM du Pree, T Fouz, MC Garcia-Abia, P Gonzalez Lopez, O Goy Lopez, S Hernandez, JM Josa, MI Merino, G Navarro De Martino, E Puerta Pelayo, J Quintario Olmeda, A Favart, D Redondo, I Romero, L Soares, MS Willmott, C Albajar, C de Trocóniz, JF Missiroli, M Brun, H Cuevas, J Fernandez Menendez, J Forthomme, L Folgueras, S Gonzalez Caballero, I Lloret Iglesias, L Brochero Cifuentes, JA Cabrillo, IJ Calderon, A Chuang, SH Duarte Campderros, J Fernandez, M Gomez, G Giammanco, A Gonzalez Sanchez, J Graziano, A Lopez Virto, A Marco, J Marco, R Martinez Rivero, C Matorras, F Munoz Sanchez, FJ Piedra Gomez, J Rodrigo, T Hollar, J Rodríguez-Marrero, AY Ruiz-Jimeno, A Scodellaro, L Vila, I Vilar Cortabitarte, R Abbaneo, D Auffray, E Auzinger, G Bachtis, M Baillon, P Jez, P Ball, AH Barney, D Bendavid, J Benhabib, L Benitez, JF Bernet, C Bianchi, G Bloch, P Bocci, A Bonato, A Komm, M Bondu, O Botta, C Breuker, H Camporesi, T Cerminara, G Christiansen, T Coarasa Perez, JA Colafranceschi, S D'Alfonso, M d'Enterria, D Lemaitre, V Dabrowski, A David, A De Guio, F De Roeck, A De Visscher, S Di Guida, S Dobson, M Dupont-Sagorin, N Elliott-Peisert, A Eugster, J Liao, J Franzoni, G Funk, W Giffels, M Gigi, D Gill, K Girone, M Giunta, M Glege, F Gomez-Reino Garrido, R Gowdy, S Militaru, O Guida, R Hammer, J Hansen, M Harris, P Innocente, V Janot, P Karavakis, E Kousouris, K Krajczar, K Lecoq, P Hartl, C Nuttens, C Lourenço, C Magini, N Malgeri, L Mannelli, M Masetti, L Meijers, F Mersi, S Meschi, E Moortgat, F Mulders, M Pagano, D Musella, P Orsini, L Palencia Cortezon, E Perez, E Perrozzi, L Petrilli, A Petrucciani, G Pfeiffer, A Pierini, M Pimiä, M Pin, A Piparo, D Plagge, M Racz, A Reece, W Rolandi, G Rovere, M Sakulin, H Santanastasio, F Schäfer, C Schwick, C Piotrzkowski, K Sekmen, S Sharma, A Siegrist, P Silva, P Simon, M Sphicas, P Steggemann, J Stieger, B Stoye, M Tsirou, A Popov, A Veres, GI Vlimant, JR Wöhri, HK Zeuner, WD Bertl, W Deiters, K Erdmann, W Horisberger, R Ingram, Q Kaestli, HC Quertenmont, L König, S Kotlinski, D Langenegger, U Renker, D Rohe, T Bachmair, F Bäni, L Bianchini, L Bortignon, P Buchmann, MA Selvaggi, M Casal, B Chanon, N Deisher, A Dissertori, G Dittmar, M Donegà, M Dünser, M Eller, P Grab, C Hits, D Vidal Marono, M Lustermann, W Mangano, B Marini, AC Martinez Ruiz Del Arbol, P Meister, D Mohr, N Nägeli, C Nef, P Nessi-Tedaldi, F Pandolfi, F Vizan Garcia, JM Pape, L Pauss, F Peruzzi, M Quittnat, M Ronga, FJ Rossini, M Starodumov, A Takahashi, M Tauscher, L Theofilatos, K Beliy, N Treille, D Wallny, R Weber, HA Amsler, C Chiochia, V De Cosa, A Favaro, C Hinzmann, A Hreus, T Ivova Rikova, M Hörmann, N Caebergs, T Kilminster, B Millan Mejias, B Ngadiuba, J Robmann, P Snoek, H Taroni, S Verzetti, M Yang, Y Cardaci, M Chen, KH Daubie, E Ferro, C Kuo, CM Li, SW Lin, W Lu, YJ Volpe, R Yu, SS Bartalini, P Chang, P Chang, YH Hammad, GH Chang, YW Chao, Y Chen, KF Chen, PH Dietz, C Grundler, U Hou, WS Hsiung, Y Kao, KY Lei, YJ Alves, GA Liu, YF Lu, RS Majumder, D Petrakou, E Shi, X Shiu, JG Tzeng, YM Wang, M Wilken, R Asavapibhop, B Correa Martins Junior, M Suwonjandee, N Adiguzel, A Bakirci, MN Cerci, S Dozen, C Dumanoglu, I Eskut, E Girgis, S Gokbulut, G Gurpinar, E Martins, T Hos, I Kangal, EE Kayis Topaksu, A Onengut, G Ozdemir, K Ozturk, S Polatoz, A Sogut, K Sunar Cerci, D Tali, B Pol, ME Topakli, H Vergili, M Akin, IV Aliev, T Bilin, B Bilmis, S Deniz, M Gamsizkan, H Guler, AM Karapinar, G Souza, MH Ocalan, K Ozpineci, A Serin, M Sever, R Surat, UE Yalvac, M Zeyrek, M Gülmez, E Isildak, B Kaya, M Aldá Júnior, WL Kaya, O Ozkorucuklu, S Bahtiyar, H Barlas, E Cankocak, K Günaydin, YO Vardarlı, FI Yücel, M Levchuk, L Sorokin, P Carvalho, W Brooke, JJ Clement, E Cussans, D Flacher, H Frazier, R Goldstein, J Grimes, M Heath, GP Heath, HF Jacob, J Hrubec, J Chinellato, J Kreczko, L Lucas, C Meng, Z Newbold, DM Paramesvaran, S Poll, A Senkin, S Smith, VJ Williams, T Bell, KW Custódio, A Belyaev, A Brew, C Brown, RM Cockerill, DJ Coughlan, JA Harder, K Harper, S Ilic, J Olaiya, E Petyt, D Da Costa, EM Shepherd-Themistocleous, CH Thea, A Tomalin, IR Womersley, WJ Worm, SD Baber, M Bainbridge, R Buchmuller, O Burton, D Colling, D De Jesus Damiao, D Cripps, N Cutajar, M Dauncey, P Davies, G Della Negra, M Ferguson, W Fulcher, J Futyan, D Gilbert, A Guneratne Bryer, A De Oliveira Martins, C Hall, G Hatherell, Z Hays, J Iles, G Jarvis, M Karapostoli, G Kenzie, M Lane, R Lucas, R Lyons, L Fonseca De Souza, S Magnan, AM Marrouche, J Mathias, B Nandi, R 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Pellett, D Pilot, J Ricci-Tam, F Rutherford, B Searle, M Shalhout, S Smith, J Sznajder, A Squires, M Tripathi, M Wilbur, S Yohay, R Andreev, V Cline, D Cousins, R Erhan, S Everaerts, P Farrell, C Tonelli Manganote, EJ Felcini, M Hauser, J Ignatenko, M Jarvis, C Rakness, G Schlein, P Takasugi, E Valuev, V Weber, M Babb, J Vilela Pereira, A Clare, R Ellison, J Gary, JW Hanson, G Heilman, J Jandir, P Lacroix, F Liu, H Long, OR Luthra, A Bernardes, CA Malberti, M Nguyen, H Shrinivas, A Sturdy, J Sumowidagdo, S Wimpenny, S Andrews, W Branson, JG Cerati, GB Cittolin, S Dias, FA D'Agnolo, RT Evans, D Holzner, A Kelley, R Kovalskyi, D Lebourgeois, M Letts, J Macneill, I Padhi, S Palmer, C Tomei, TR Pieri, M Sani, M Sharma, V Simon, S Sudano, E Tadel, M Tu, Y Vartak, A Wasserbaech, S Würthwein, F Kiesenhofer, W Gregores, EM Yagil, A Yoo, J Barge, D Campagnari, C Danielson, T Flowers, K Geffert, P George, C Golf, F Incandela, J Lagana, C Justus, C Magaña Villalba, R Mccoll, N Pavlunin, V 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Robles, J Salur, S Schnetzer, S Seitz, C Somalwar, S Stone, R Thomas, S Polic, D Thomassen, P Walker, M Rose, K Spanier, S Yang, ZC York, A Bouhali, O Eusebi, R Flanagan, W Gilmore, J Puljak, I Kamon, T Khotilovich, V Krutelyov, V Montalvo, R Osipenkov, I Pakhotin, Y Perloff, A Roe, J Safonov, A Sakuma, T Antunovic, Z Suarez, I Tatarinov, A Toback, D Akchurin, N Cowden, C Damgov, J Dragoiu, C Dudero, PR Kovitanggoon, K Kunori, S Kovac, M Lee, SW Libeiro, T Volobouev, I Appelt, E Delannoy, AG Greene, S Gurrola, A Johns, W Maguire, C Mao, Y Brigljevic, V Melo, A Sharma, M Sheldon, P Snook, B Tuo, S Velkovska, J Arenton, MW Boutle, S Cox, B Francis, B Kadija, K Goodell, J Hirosky, R Ledovskoy, A Lin, C Neu, C Wood, J Gollapinni, S Harr, R Karchin, PE Kottachchi Kankanamge Don, C Luetic, J Lamichhane, P Belknap, DA Borrello, L Carlsmith, D Cepeda, M Dasu, S Duric, S Friis, E Grothe, M Hall-Wilton, R Mekterovic, D Herndon, M Hervé, A Klabbers, P Klukas, J Lanaro, A Levine, A Loveless, R 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| Keywords: | Top quark;W boson;CMS;LHC |
| Issue Date: | 2014 |
| Citation: | Physical Review Letters, 112(23): 231802, (9 June 2014) |
| Abstract: | The first observation of the associated production of a single top quark and a W boson is presented. The analysis is based on a data set corresponding to an integrated luminosity of 12.2 fb^{-1} of proton-proton collisions at sqrt[s]=8 TeV recorded by the CMS experiment at the LHC. Events with two leptons and a jet originating from a b quark are selected. A multivariate analysis based on kinematic and topological properties is used to separate the signal from the dominant tt[over ¯] background. An excess consistent with the signal hypothesis is observed, with a significance which corresponds to 6.1 standard deviations above a background-only hypothesis. The measured production cross section is 23.4±5.4 pb, in agreement with the standard model prediction. |
| 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 articles title, journal citation, and DOI. |
| URI: | http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.112.231802 http://bura.brunel.ac.uk/handle/2438/9334 |
| DOI: | http://dx.doi.org/10.1103/PhysRevLett.112.231802 |
| ISSN: | 0031-9007 |
| Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers
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