Search for a vectorlike quark with charge 2/3 in t+Z events from pp collisions at √s=7 TeV.

Autor: Chatrchyan S; Yerevan Physics Institute, Yerevan, Armenia., Khachatryan V, Sirunyan AM, Tumasyan A, Adam W, Bergauer T, Dragicevic M, Erö J, Fabjan C, Friedl M, Frühwirth R, Ghete VM, Hammer J, Hänsel S, Hoch M, Hörmann N, Hrubec J, Jeitler M, Kiesenhofer W, Krammer M, Liko D, Mikulec I, Pernicka M, Rahbaran B, Rohringer H, Schöfbeck R, Strauss J, Taurok A, Teischinger F, Trauner C, Wagner P, Waltenberger W, Walzel G, Widl E, Wulz CE, Mossolov V, Shumeiko N, Suarez Gonzalez J, Bansal S, Benucci L, De Wolf EA, Janssen X, Luyckx S, Maes T, Mucibello L, Ochesanu S, Roland B, Rougny R, Selvaggi M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Blekman F, Blyweert S, D'Hondt J, Gonzalez Suarez R, Kalogeropoulos A, Maes M, Olbrechts A, Van Doninck W, Van Mulders P, Van Onsem GP, Villella I, Charaf O, Clerbaux B, De Lentdecker G, Dero V, Gay AP, Hammad GH, Hreus T, Marage PE, Raval A, Thomas L, Vander Marcken G, Vander Velde C, Vanlaer P, Adler V, Cimmino A, Costantini S, Grunewald M, Klein B, Lellouch J, Marinov A, McCartin J, Ryckbosch D, Thyssen F, Tytgat M, Vanelderen L, Verwilligen P, Walsh S, Zaganidis N, Basegmez S, Bruno G, Caudron J, Ceard L, Cortina Gil E, De Favereau De Jeneret J, Delaere C, Favart D, Giammanco A, Grégoire G, Hollar J, Lemaitre V, Liao J, Militaru O, Nuttens C, Ovyn S, Pagano D, Pin A, Piotrzkowski K, Schul N, Beliy N, Caebergs T, Daubie E, Alves GA, Brito L, De Jesus Damiao D, Pol ME, Souza MH, Aldá Júnior WL, Carvalho W, Da Costa EM, De Oliveira Martins C, Fonseca De Souza S, Matos Figueiredo D, Mundim L, Nogima H, Oguri V, Prado Da Silva WL, Santoro A, Silva Do Amaral SM, Sznajder A, Anjos TS, Bernardes CA, Dias FA, Fernandez Perez Tomei TR, Gregores EM, Lagana C, Marinho F, Mercadante PG, Novaes SF, Padula SS, Darmenov N, Genchev V, Iaydjiev P, Piperov S, Rodozov M, Stoykova S, Sultanov G, Tcholakov V, Trayanov R, Vutova M, Dimitrov A, Hadjiiska R, Karadzhinova A, Kozhuharov V, Litov L, Mateev M, Pavlov B, Petkov P, Bian JG, Chen GM, Chen HS, Jiang CH, Liang D, Liang S, Meng X, Tao J, Wang J, Wang J, Wang X, Wang Z, Xiao H, Xu M, Zang J, Zhang Z, Ban Y, Guo S, Guo Y, Li W, Mao Y, Qian SJ, Teng H, Zhu B, Zou W, Cabrera A, Gomez Moreno B, Ocampo Rios AA, Osorio Oliveros AF, Sanabria JC, Godinovic N, Lelas D, Lelas K, Plestina R, Polic D, Puljak I, Antunovic Z, Dzelalija M, Kovac M, Brigljevic V, Duric S, Kadija K, Luetic J, Morovic S, Attikis A, Galanti M, Mousa J, Nicolaou C, Ptochos F, Razis PA, Finger M, Finger M Jr, Assran Y, Ellithi Kamel A, Khalil S, Mahmoud MA, Radi A, Hektor A, Kadastik M, Müntel M, Raidal M, Rebane L, Tiko A, Azzolini V, Eerola P, Fedi G, Voutilainen M, Czellar S, Härkönen J, Heikkinen A, Karimäki V, Kinnunen R, Kortelainen MJ, Lampén T, Lassila-Perini K, Lehti S, Lindén T, Luukka P, Mäenpää T, Tuominen E, Tuominiemi J, Tuovinen E, Ungaro D, Wendland L, Banzuzi K, Karjalainen A, Korpela A, Tuuva T, Sillou D, Besancon M, Choudhury S, Dejardin M, Denegri D, Fabbro B, Faure JL, Ferri F, Ganjour S, Givernaud A, Gras P, Hamel de Monchenault G, Jarry P, Locci E, Malcles J, Marionneau M, Millischer L, Rander J, Rosowsky A, Shreyber I, Titov M, Baffioni S, Beaudette F, Benhabib L, Bianchini L, Bluj M, Broutin C, Busson P, Charlot C, Dahms T, Dobrzynski L, Elgammal S, Granier de Cassagnac R, Haguenauer M, Miné P, Mironov C, Ochando C, Paganini P, Sabes D, Salerno R, Sirois Y, Thiebaux C, Veelken C, Zabi A, Agram JL, Andrea J, Bloch D, Bodin D, Brom JM, Cardaci M, Chabert EC, Collard C, Conte E, Drouhin F, Ferro C, Fontaine JC, Gelé D, Goerlach U, Greder S, Juillot P, Karim M, Le Bihan AC, Mikami Y, Van Hove P, Fassi F, Mercier D, Baty C, Beauceron S, Beaupere N, Bedjidian M, Bondu O, Boudoul G, Boumediene D, Brun H, Chasserat J, Chierici R, Contardo D, Depasse P, El Mamouni H, Fay J, Gascon S, Ille B, Kurca T, Le Grand T, Lethuillier M, Mirabito L, Perries S, Sordini V, Tosi S, Tschudi Y, Verdier P, Viret S, Lomidze D, Anagnostou G, Beranek S, Edelhoff M, Feld L, Heracleous N, Hindrichs O, Jussen R, Klein K, Merz J, Mohr N, Ostapchuk A, Perieanu A, Raupach F, Sammet J, Schael S, Sprenger D, Weber H, Weber M, Wittmer B, Zhukov V, Ata M, Dietz-Laursonn E, Erdmann M, Hebbeker T, Heidemann C, Hinzmann A, Hoepfner K, Klimkovich T, Klingebiel D, Kreuzer P, Lanske D, Lingemann J, Magass C, Merschmeyer M, Meyer A, Papacz P, Pieta H, Reithler H, Schmitz SA, Sonnenschein L, Steggemann J, Teyssier D, Bontenackels M, Cherepanov V, Davids M, Flügge G, Geenen H, Giffels M, Haj Ahmad W, Hoehle F, Kargoll B, Kress T, Kuessel Y, Linn A, Nowack A, Perchalla L, Pooth O, Rennefeld J, Sauerland P, Stahl A, Tornier D, Zoeller MH, Aldaya Martin M, Behrenhoff W, Behrens U, Bergholz M, Bethani A, Borras K, Cakir A, Campbell A, Castro E, Dammann D, Eckerlin G, Eckstein D, Flossdorf A, Flucke G, Geiser A, Hauk J, Jung H, Kasemann M, Katsas P, Kleinwort C, Kluge H, Knutsson A, Krämer M, Krücker D, Kuznetsova E, Lange W, Lohmann W, Lutz B, Mankel R, Marienfeld M, Melzer-Pellmann IA, Meyer AB, Mnich J, Mussgiller A, Olzem J, Petrukhin A, Pitzl D, Raspereza A, Rosin M, Schmidt R, Schoerner-Sadenius T, Sen N, Spiridonov A, Stein M, Tomaszewska J, Walsh R, Wissing C, Autermann C, Blobel V, Bobrovskyi S, Draeger J, Enderle H, Gebbert U, Görner M, Hermanns T, Kaschube K, Kaussen G, Kirschenmann H, Klanner R, Lange J, Mura B, Naumann-Emme S, Nowak F, Pietsch N, Sander C, Schettler H, Schleper P, Schlieckau E, Schröder M, Schum T, Stadie H, Steinbrück G, Thomsen J, Barth C, Bauer J, Berger J, Buege V, Chwalek T, De Boer W, Dierlamm A, Dirkes G, Feindt M, Gruschke J, Hackstein C, Hartmann F, Heinrich M, Held H, Hoffmann KH, Honc S, Katkov I, Komaragiri JR, Kuhr T, Martschei D, Mueller S, Müller T, Niegel M, Oberst O, Oehler A, Ott J, Peiffer T, Quast G, Rabbertz K, Ratnikov F, Ratnikova N, Renz M, Röcker S, Saout C, Scheurer A, Schieferdecker P, Schilling FP, Schmanau M, Schott G, Simonis HJ, Stober FM, Troendle D, Wagner-Kuhr J, Weiler T, Zeise M, Ziebarth EB, Daskalakis G, Geralis T, Kesisoglou S, Kyriakis A, Loukas D, Manolakos I, Markou A, Markou C, Mavrommatis C, Ntomari E, Petrakou E, Gouskos L, Mertzimekis TJ, Panagiotou A, Saoulidou N, Stiliaris E, Evangelou I, Foudas C, Kokkas P, Manthos N, Papadopoulos I, Patras V, Triantis FA, Aranyi A, Bencze G, Boldizsar L, Hajdu C, Hidas P, Horvath D, Kapusi A, Krajczar K, Sikler F, Veres GI, Vesztergombi G, Beni N, Molnar J, Palinkas J, Szillasi Z, Veszpremi V, Karancsi J, Raics P, Trocsanyi ZL, Ujvari B, Beri SB, Bhatnagar V, Dhingra N, Gupta R, Jindal M, Kaur M, Kohli JM, Mehta MZ, Nishu N, Saini LK, Sharma A, Singh AP, Singh J, Singh SP, Ahuja S, Choudhary BC, Gupta P, Kumar A, Kumar A, Malhotra S, Naimuddin M, Ranjan K, Shivpuri RK, Banerjee S, Bhattacharya S, Dutta S, Gomber B, Jain S, Jain S, Khurana R, Sarkar S, Choudhury RK, Dutta D, Kailas S, Kumar V, Mehta P, Mohanty AK, Pant LM, Shukla P, Aziz T, Guchait M, Gurtu A, Maity M, Majumder D, Majumder G, Mathew T, Mazumdar K, Mohanty GB, Parida B, Saha A, Sudhakar K, Wickramage N, Banerjee S, Dugad S, Mondal NK, Arfaei H, Bakhshiansohi H, Etesami SM, Fahim A, Hashemi M, Hesari H, Jafari A, Khakzad M, Mohammadi A, Mohammadi Najafabadi M, Paktinat Mehdiabadi S, Safarzadeh B, Zeinali M, Abbrescia M, Barbone L, Calabria C, Colaleo A, Creanza D, De Filippis N, De Palma M, Fiore L, Iaselli G, Lusito L, Maggi G, Maggi M, Manna N, Marangelli B, My S, Nuzzo S, Pacifico N, Pierro GA, Pompili A, Pugliese G, Romano F, Roselli G, Selvaggi G, Silvestris L, Trentadue R, Tupputi S, Zito G, Abbiendi G, Benvenuti AC, Bonacorsi D, Braibant-Giacomelli S, Brigliadori L, Capiluppi P, Castro A, Cavallo FR, Cuffiani M, Dallavalle GM, Fabbri F, Fanfani A, Fasanella D, Giacomelli P, Giunta M, Grandi C, Marcellini S, Masetti G, Meneghelli M, Montanari A, Navarria FL, Odorici F, Perrotta A, Primavera F, Rossi AM, Rovelli T, Siroli G, Travaglini R, Albergo S, Cappello G, Chiorboli M, Costa S, Potenza R, Tricomi A, Tuve C, Barbagli G, Ciulli V, Civinini C, D'Alessandro R, Focardi E, Frosali S, Gallo E, Gonzi S, Meschini M, Paoletti S, Sguazzoni G, Tropiano A, Benussi L, Bianco S, Colafranceschi S, Fabbri F, Piccolo D, Fabbricatore P, Musenich R, Benaglia A, De Guio F, Di Matteo L, Gennai S, Ghezzi A, Malvezzi S, Martelli A, Massironi A, Menasce D, Moroni L, Paganoni M, Pedrini D, Ragazzi S, Redaelli N, Sala S, Tabarelli de Fatis T, Buontempo S, Carrillo Montoya CA, Cavallo N, De Cosa A, Dogangun O, Fabozzi F, Iorio AO, Lista L, Merola M, Paolucci P, Azzi P, Bacchetta N, Bellan P, Bisello D, Branca A, Carlin R, Checchia P, Dorigo T, Dosselli U, Fanzago F, Gasparini F, Gasparini U, Gozzelino A, Lacaprara S, Lazzizzera I, Margoni M, Mazzucato M, Meneguzzo AT, Nespolo M, Perrozzi L, Pozzobon N, Ronchese P, Simonetto F, Torassa E, Tosi M, Vanini S, Zotto P, Zumerle G, Baesso P, Berzano U, Ratti SP, Riccardi C, Torre P, Vitulo P, Viviani C, Biasini M, Bilei GM, Caponeri B, Fanò L, Lariccia P, Lucaroni A, Mantovani G, Menichelli M, Nappi A, Romeo F, Santocchia A, Taroni S, Valdata M, Azzurri P, Bagliesi G, Bernardini J, Boccali T, Broccolo G, Castaldi R, D'Agnolo RT, Dell'Orso R, Fiori F, Foà L, Giassi A, Kraan A, Ligabue F, Lomtadze T, Martini L, Messineo A, Palla F, Palmonari F, Segneri G, Serban AT, Spagnolo P, Tenchini R, Tonelli G, Venturi A, Verdini PG, Barone L, Cavallari F, Del Re D, Di Marco E, Diemoz M, Franci D, Grassi M, Longo E, Meridiani P, Nourbakhsh S, Organtini G, Pandolfi F, Paramatti R, Rahatlou S, Sigamani M, Amapane N, Arcidiacono R, Argiro S, Arneodo M, Biino C, Botta C, Cartiglia N, Castello R, Costa M, Demaria N, Graziano A, Mariotti C, Maselli S, Migliore E, Monaco V, Musich M, Obertino MM, Pastrone N, Pelliccioni M, Potenza A, Romero A, Ruspa M, Sacchi R, Sola V, Solano A, Staiano A, Vilela Pereira A, Belforte S, Cossutti F, Della Ricca G, Gobbo B, Marone M, Montanino D, Penzo A, Heo SG, Nam SK, Chang S, Chung J, Kim DH, Kim GN, Kim JE, Kong DJ, Park H, Ro SR, Son DC, Son T, Kim JY, Kim ZJ, Song S, Jo HY, Choi S, Gyun D, Hong B, Jo M, Kim H, Kim JH, Kim TJ, Lee KS, Moon DH, Park SK, Seo E, Sim KS, Choi M, Kang S, Kim H, Park C, Park IC, Park S, Ryu G, Cho Y, Choi Y, Choi YK, Goh J, Kim MS, Lee B, Lee J, Lee S, Seo H, Yu I, Bilinskas MJ, Grigelionis I, Janulis M, Martisiute D, Petrov P, Polujanskas M, Sabonis T, Castilla-Valdez H, De La Cruz-Burelo E, Heredia-de La Cruz I, Lopez-Fernandez R, Magaña Villalba R, Martínez-Ortega J, Sánchez-Hernández A, Villasenor-Cendejas LM, Carrillo Moreno S, Vazquez Valencia F, Salazar Ibarguen HA, Casimiro Linares E, Morelos Pineda A, Reyes-Santos MA, Krofcheck D, Tam J, Butler PH, Doesburg R, Silverwood H, Ahmad M, Ahmed I, Asghar MI, Hoorani HR, Khalid S, Khan WA, Khurshid T, Qazi S, Shah MA, Shoaib M, Brona G, Cwiok M, Dominik W, Doroba K, Kalinowski A, Konecki M, Krolikowski J, Frueboes T, Gokieli R, Górski M, Kazana M, Nawrocki K, Romanowska-Rybinska K, Szleper M, Wrochna G, Zalewski P, Almeida N, Bargassa P, David A, Faccioli P, Ferreira Parracho PG, Gallinaro M, Musella P, Nayak A, Pela J, Ribeiro PQ, Seixas J, Varela J, Afanasiev S, Belotelov I, Bunin P, Gavrilenko M, Golutvin I, Kamenev A, Karjavin V, Kozlov G, Lanev A, Moisenz P, Palichik V, Perelygin V, Shmatov S, Smirnov V, Volodko A, Zarubin A, Golovtsov V, Ivanov Y, Kim V, Levchenko P, Murzin V, Oreshkin V, Smirnov I, Sulimov V, Uvarov L, Vavilov S, Vorobyev A, Vorobyev A, Andreev Y, Dermenev A, Gninenko S, Golubev N, Kirsanov M, Krasnikov N, Matveev V, Pashenkov A, Toropin A, Troitsky S, Epshteyn V, Erofeeva M, Gavrilov V, Kaftanov V, Kossov M, Krokhotin A, Lychkovskaya N, Popov V, Safronov G, Semenov S, Stolin V, Vlasov E, Zhokin A, Belyaev A, Boos E, Dubinin M, Dudko L, Ershov A, Gribushin A, Kodolova O, Lokhtin I, Markina A, Obraztsov S, Perfilov M, Petrushanko S, Sarycheva L, Savrin V, Snigirev A, Andreev V, Azarkin M, Dremin I, Kirakosyan M, Leonidov A, Mesyats G, Rusakov SV, Vinogradov A, Azhgirey I, Bayshev I, Bitioukov S, Grishin V, Kachanov V, Konstantinov D, Korablev A, Krychkine V, Petrov V, Ryutin R, Sobol A, Tourtchanovitch L, Troshin S, Tyurin N, Uzunian A, Volkov A, Adzic P, Djordjevic M, Krpic D, Milosevic J, Aguilar-Benitez M, Alcaraz Maestre J, Arce P, Battilana C, Calvo E, Cerrada M, Chamizo Llatas M, Colino N, De La Cruz B, Delgado Peris A, Diez Pardos C, Domínguez Vázquez D, Fernandez Bedoya C, Fernández Ramos JP, Ferrando A, Flix J, Fouz MC, Garcia-Abia P, Gonzalez Lopez O, Goy Lopez S, Hernandez JM, Josa MI, Merino G, Puerta Pelayo J, Redondo I, Romero L, Santaolalla J, Soares MS, Willmott C, Albajar C, Codispoti G, de Trocóniz JF, Cuevas J, Fernandez Menendez J, Folgueras S, Gonzalez Caballero I, Lloret Iglesias L, Vizan Garcia JM, Brochero Cifuentes JA, Cabrillo IJ, Calderon A, Chuang SH, Duarte Campderros J, Felcini M, Fernandez M, Gomez G, Gonzalez Sanchez J, Jorda C, Lobelle Pardo P, Lopez Virto A, Marco J, Marco R, Martinez Rivero C, Matorras F, Munoz Sanchez FJ, Piedra Gomez J, Rodrigo T, Rodríguez-Marrero AY, Ruiz-Jimeno A, Scodellaro L, Sobron Sanudo M, Vila I, Vilar Cortabitarte R, Abbaneo D, Auffray E, Auzinger G, Baillon P, Ball AH, Barney D, Bell AJ, Benedetti D, Bernet C, Bialas W, Bloch P, Bocci A, Bolognesi S, Bona M, Breuker H, Bunkowski K, Camporesi T, Cerminara G, Christiansen T, Coarasa Perez JA, Curé B, D'Enterria D, De Roeck A, Di Guida S, Dupont-Sagorin N, Elliott-Peisert A, Frisch B, Funk W, Gaddi A, Georgiou G, Gerwig H, Gigi D, Gill K, Giordano D, Glege F, Gomez-Reino Garrido R, Gouzevitch M, Govoni P, Gowdy S, Guida R, Guiducci L, Hansen M, Hartl C, Harvey J, Hegeman J, Hegner B, Hoffmann HF, Innocente V, Janot P, Kaadze K, Karavakis E, Lecoq P, Lenzi P, Lourenço C, Mäki T, Malberti M, Malgeri L, Mannelli M, Masetti L, Maurisset A, Mavromanolakis G, Meijers F, Mersi S, Meschi E, Moser R, Mozer MU, Mulders M, Nesvold E, Nguyen M, Orimoto T, Orsini L, Palencia Cortezon E, Perez E, Petrilli A, Pfeiffer A, Pierini M, Pimiä M, Piparo D, Polese G, Quertenmont L, Racz A, Reece W, Rodrigues Antunes J, Rolandi G, Rommerskirchen T, Rovelli C, Rovere M, Sakulin H, Schäfer C, Schwick C, Segoni I, Sharma A, Siegrist P, Silva P, Simon M, Sphicas P, Spiga D, Spiropulu M, Stoye M, Tsirou A, Vichoudis P, Wöhri HK, Worm SD, Zeuner WD, Bertl W, Deiters K, Erdmann W, Gabathuler K, Horisberger R, Ingram Q, Kaestli HC, König S, Kotlinski D, Langenegger U, Meier F, Renker D, Rohe T, Sibille J, Bäni L, Bortignon P, Caminada L, Casal B, Chanon N, Chen Z, Cittolin S, Dissertori G, Dittmar M, Eugster J, Freudenreich K, Grab C, Hintz W, Lecomte P, Lustermann W, Marchica C, Ruiz del Arbol PM, Milenovic P, Moortgat F, Nägeli C, Nef P, Nessi-Tedaldi F, Pape L, Pauss F, Punz T, Rizzi A, Ronga FJ, Rossini M, Sala L, Sanchez AK, Sawley MC, Starodumov A, Stieger B, Takahashi M, Tauscher L, Thea A, Theofilatos K, Treille D, Urscheler C, Wallny R, Weber M, Wehrli L, Weng J, Aguilo E, Amsler C, Chiochia V, De Visscher S, Favaro C, Ivova Rikova M, Jaeger A, Mejias BM, Otiougova P, Robmann P, Schmidt A, Snoek H, Chang YH, Chen KH, Kuo CM, Li SW, Lin W, Liu ZK, Lu YJ, Mekterovic D, Volpe R, Yu SS, Bartalini P, Chang P, Chang YH, Chang YW, Chao Y, Chen KF, Dietz C, Grundler U, Hou WS, Hsiung Y, Kao KY, Lei YJ, Lu RS, Shiu JG, Tzeng YM, Wan X, Wang M, Adiguzel A, Bakirci MN, Cerci S, Dozen C, Dumanoglu I, Eskut E, Girgis S, Gokbulut G, Hos I, Kangal EE, Topaksu AK, Onengut G, Ozdemir K, Ozturk S, Polatoz A, Sogut K, Cerci DS, Tali B, Topakli H, Uzun D, Vergili LN, Vergili M, Akin IV, Aliev T, Bilin B, Bilmis S, Deniz M, Gamsizkan H, Guler AM, Ocalan K, Ozpineci A, Serin M, Sever R, Surat UE, Yalvac M, Yildirim E, Zeyrek M, Deliomeroglu M, Demir D, Gülmez E, Isildak B, Kaya M, Kaya O, Ozbek M, Ozkorucuklu S, Sonmez N, Levchuk L, Bostock F, Brooke JJ, Cheng TL, Clement E, Cussans D, Frazier R, Goldstein J, Grimes M, Heath GP, Heath HF, Kreczko L, Metson S, Newbold DM, Nirunpong K, Poll A, Senkin S, Smith VJ, Basso L, Bell KW, Belyaev A, Brew C, Brown RM, Camanzi B, Cockerill DJ, Coughlan JA, Harder K, Harper S, Jackson J, Kennedy BW, Olaiya E, Petyt D, Radburn-Smith BC, Shepherd-Themistocleous CH, Tomalin IR, Womersley WJ, Bainbridge R, Ball G, Ballin J, Beuselinck R, Buchmuller O, Colling D, Cripps N, Cutajar M, Davies G, Della Negra M, Ferguson W, Fulcher J, Futyan D, Gilbert A, Guneratne Bryer A, Hall G, Hatherell Z, Hays J, Iles G, Jarvis M, Karapostoli G, Lyons L, Magnan AM, Marrouche J, Mathias B, Nandi R, Nash J, Nikitenko A, Papageorgiou A, Pesaresi M, Petridis K, Pioppi M, Raymond DM, Rogerson S, Rompotis N, Rose A, Ryan MJ, Seez C, Sharp P, Sparrow A, Tapper A, Tourneur S, Vazquez Acosta M, Virdee T, Wakefield S, Wardle N, Wardrope D, Whyntie T, Barrett M, Chadwick M, Cole JE, Hobson PR, Khan A, Kyberd P, Leslie D, Martin W, Reid ID, Teodorescu L, Hatakeyama K, Liu H, Henderson C, Bose T, Carrera Jarrin E, Fantasia C, Heister A, St John J, Lawson P, Lazic D, Rohlf J, Sperka D, Sulak L, Avetisyan A, Bhattacharya S, 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Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2011 Dec 30; Vol. 107 (27), pp. 271802. Date of Electronic Publication: 2011 Dec 29.
DOI: 10.1103/PhysRevLett.107.271802
Abstrakt: A search for pair-produced heavy vectorlike charge-2/3 quarks, T, in pp collisions at a center-of-mass energy of 7 TeV, is performed with the CMS detector at the LHC. Events consistent with the flavor-changing-neutral-current decay of a T quark to a top quark and a Z boson are selected by requiring two leptons from the Z-boson decay, as well as an additional isolated charged lepton. In a data sample corresponding to an integrated luminosity of 1.14  fb(-1), the number of observed events is found to be consistent with the standard model background prediction. Assuming a branching fraction of 100% for the decay T→tZ, a T quark with a mass less than 475  GeV/c(2) is excluded at the 95% confidence level.
Databáze: MEDLINE