Brunel University Research Archive (BURA): Search for quark compositeness with the dijet centrality ratio in pp collisions at √s=7TeV

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Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/6091

Title:	Search for quark compositeness with the dijet centrality ratio in pp collisions at √s=7TeV
Authors:	Khachatryan, V Sirunyan, AM Tumasyan, A Adam, W Bergauer, T Dragicevic, M Ero, J Fabjan, C Friedl, M Fruhwirth, R Ghete, VM Camporesi, T Rekovic, V Rusack, R Sasseville, M Singovsky, A Cremaldi, LM Godang, R Kroeger, R Perera, L Rahmat, R Kiesenhofer, W Cano, E Mousa, J Sanders, DA Summers, D Bloom, K Bose, S Butt, J Claes, DR Dominguez, A Eads, M Keller, J Cerminara, G Kelly, T Nicolaou, C Kravchenko, I Lazo-Flores, J Lundstedt, C Malbouisson, H Malik, S Snow, GR Baur, U Godshalk, A Christiansen, T Iashvili, I Kharchilava, A Ptochos, F Kumar, A Smith, K Zennamo, J Alverson, G Barberis, E Baumgartel, D Boeriu, O Perez, JAC Chasco, M Kaadze, K Reucroft, S Razis, PA Swain, J Wood, D Zhang, J Anastassov, A Kubik, A Odell, N Covarelli, R Ofierzynski, RA Pollack, B Pozdnyakov, A Schmitt, M Rykaczewski, H Stoynev, S Velasco, M Won, S Antonelli, L Berry, D Cure, B Hildreth, M Jessop, C Karmgard, DJ Kolb, J Kolberg, T Abdel-Basit, A Lannon, K Luo, W Lynch, S Marinelli, N D'Enterria, D Morse, DM Pearson, T Ruchti, R Slaunwhite, J Valls, N Warchol, J Assran, Y Wayne, M Ziegler, J Bylsma, B Dahms, T Durkin, LS Gu, J Hill, C Killewald, P Ling, TY Rodenburg, M Williams, G Mahmoud, MA Adam, N Berry, E De Roeck, A Elmer, P Gerbaudo, D Halyo, V Hebda, P Hunt, A Jones, J Laird, E Pegna, DL Hektor, A Marlow, D Piotrzkowski, K Souza, MHG Medvedeva, T Mooney, M Olsen, J Piroue, P Saka, H Stickland, D Tully, C Werner, JS Zuranski, A Kadastik, M Elliott-Peisert, A Acosta, JG Huang, XT Lopez, A Mendez, H Oliveros, S Vargas, JER Zatserklyaniy, A Alagoz, E Barnes, VE Bolla, G Funk, W Krammer, M Kannike, K Borrello, L Bortoletto, D Everett, A Garfinkel, AF Gecse, Z Gutay, L Jones, M Koybasi, O Gaddi, A Laasanen, AT Leonardo, N Ntel, MM Liu, C Maroussov, V Meier, M Merkel, P Miller, DH Neumeister, N Potamianos, K Gennai, S Shipsey, I Silvers, D Svyatkovskiy, A Raidal, M Yoo, HD Zablocki, J Zheng, Y Jindal, P Parashar, N Boulahouache, C Georgiou, G Cuplov, V Ecklund, KM Geurts, FJM Liu, JH Rebane, L Morales, J Padley, BP Redjimi, R Roberts, J Zabel, J Gerwig, H Betchart, B Bodek, A Chung, YS de Barbaro, P Demina, R Azzolini, V Eshaq, Y Flacher, H Garcia-Bellido, A Goldenzweig, P Gigi, D Gotra, Y Han, J Harel, A Miner, DC Orbaker, D Petrillo, G Eerola, P Vishnevskiy, D Zielinski, M Bhatti, A Gill, K Demortier, L Goulianos, K Lungu, G Mesropian, C Yan, M Atramentov, O Barker, A Czellar, S Duggan, D Gershtein, Y Giordano, D Gray, R Halkiadakis, E Hidas, D Hits, D Lath, A Panwalkar, S Patel, R Richards, A Harkonen, J Rose, K Volkov, A Glege, F Schnetzer, S Somalwar, S Stone, R Thomas, S Cerizza, G Hollingsworth, M Spanier, S Yang, ZC York, A Heikkinen, A Hammer, J Asaadi, J Eusebi, R Gilmore, J Gurrola, A Kamon, T Khotilovich, V Montalvo, R Nguyen, CN Pivarski, J Safonov, A Carvalho, W Karimaki, V Sengupta, S Tatarinov, A Toback, D Weinberger, M Akchurin, N Bardak, C Damgov, J Jeong, C Kovitanggoon, K Garrido, RGR Lee, SW Liko, D Kinnunen, R Mane, P Roh, Y Sill, A Volobouev, I Wigmans, R Yazgan, E Appelt, E Gouzevitch, M Brownson, E Engh, D Florez, C Klem, J Gabella, W Johns, W Kurt, P Maguire, C Melo, A Sheldon, P Gowdy, S Velkovska, J Arenton, MW Balazs, M Boutle, S Kortelainen, MJ Buehler, M Conetti, S Cox, B Francis, B Hirosky, R Guiducci, L Ledovskoy, A Lin, C Neu, C Patel, T Yohay, R Lampen, T Gollapinni, S Harr, R Karchin, PE Mattson, M Hansen, M Milstene, C Sakharov, A Anderson, M Bachtis, M Bellinger, JN Carlsmith, D Lassila-Perini, K Dasu, S Efron, J Gray, L Harvey, J Grogg, KS Grothe, M Hall-Wilton, R Herndon, M Klabbers, P Klukas, J Lanaro, A Lehti, S Lazaridis, C Leonard, J Hegeman, J Liu, J Lomidze, D Loveless, R Mohapatra, A Parker, W Reeder, D Ross, I Savin, A Linden, T Smith, WH Adzic, P Hegner, B Swanson, J Weinberg, M CMS Collaboration Luukka, P Maenpaa, T Tuominen, E Mikulec, I Tuominiemi, J Tuovinen, E Ungaro, D Henderson, C Wendland, L Banzuzi, K Korpela, A Tuuva, T Sillou, D Besancon, M Dejardin, M Pernicka, M Denegri, D Fabbro, B Hoffmann, HF Faure, JL Ferri, F Ganjour, S Gentit, FX Givernaud, A Gras, P de Monchenault, GH Jarry, P Rohringer, H Locci, E Da Costa, EM Malcles, J Marionneau, M Millischer, L Rander, J Rosowsky, A Titov, M Verrecchia, P Baffioni, S Bianchini, L Schofbeck, R Honma, A Bluj, M Broutin, C Busson, P Charlot, C Dobrzynski, L de Cassagnac, RG Haguenauer, M Mine, P Mironov, C Ochando, C Innocente, V Strauss, J Paganini, P Sabes, D Salerno, R Sirois, Y Thiebaux, C Wyslouch, B Zabi, A Agram, JL Andrea, J Janot, P Besson, A Taurok, A Bloch, D Bodin, D Brom, JM Cardaci, M Chabert, EC Collard, C Conte, E Drouhin, F Karavakis, E Ferro, C Fontaine, JC Teischinger, F Gele, D Goerlach, U Greder, S Juillot, P Karim, M Le Bihan, AC Mikami, Y Lecoq, P Van Hove, P Fassi, F Mercier, D Waltenberger, W Baty, C Beaupere, N Bedjidian, M Bondu, O Boudoul, G Boumediene, D Leonidopoulos, C Brun, H Chanon, N Chierici, R Contardo, D Walzel, G Depasse, P El Mamouni, H Falkiewicz, A Fay, J Gascon, S Djordjevic, M Lourenco, C Ille, B Kurca, T Le Grand, T Lethuillier, M Mirabito, L Widl, E Perries, S Sordini, V Tosi, S Tschudi, Y Macpherson, A Verdier, P Xiao, H Roinishvili, V Anagnostou, G Edelhoff, M Feld, L Wulz, CE Heracleous, N Hindrichs, O Jussen, R Maki, T Klein, K Merz, J Mohr, N Ostapchuk, A Perieanu, A Raupach, F Sammet, J Mossolov, V Schael, S Sprenger, D Malgeri, L Weber, H Weber, M Wittmer, B Ata, M Bender, W Erdmann, M Frangenheim, J Hebbeker, T Shumeiko, N Hinzmann, A Martins, CD Hoepfner, K Hof, C Klimkovich, T Klingebiel, D Kreuzer, P Lanske, D Magass, C Masetti, G Merschmeyer, M Gonzalez, JS Mannelli, M Meyer, A Papacz, P Pieta, H Reithler, H Schmitz, SA Sonnenschein, L Steggemann, J Teyssier, D Bontenackels, M Davids, M Masetti, L Benucci, L Duda, M Flugge, G Geenen, H Giffels, M Ahmad, WH Heydhausen, D Kress, T Kuessel, Y Linn, A Meijers, F Nowack, A Ceard, L Perchalla, L Pooth, O Rennefeld, J Sauerland, P Stahl, A Thomas, M Tornier, D Zoeller, MH Mersi, S Martin, MA Behrenhoff, W De Wolf, EA Behrens, U Bergholz, M Borras, K Cakir, A Campbell, A Castro, E Dammann, D Meschi, E Eckerlin, G Eckstein, D Flossdorf, A Janssen, X Flucke, G Geiser, A Glushkov, I Hauk, J Jung, H Kasemann, M Krpic, D Moser, R Katkov, I Katsas, P Kleinwort, C Kluge, H Maes, T Knutsson, A Krucker, D Kuznetsova, E Lange, W Lohmann, W Mozer, MU Mankel, R Marienfeld, M Melzer-Pellmann, IA Meyer, AB Mnich, J Mucibello, L Mussgiller, A Olzem, J Parenti, A Raspereza, A Mulders, M Raval, A Schmidt, R Schoerner-Sadenius, T Sen, N Stein, M Tomaszewska, J Ochesanu, S Volyanskyy, D Walsh, R Wissing, C Nesvold, E Autermann, C Bobrovskyi, S Draeger, J Enderle, H Gebbert, U Kaschube, K Kaussen, G Roland, B Klanner, R Mura, B Orimoto, T Naumann-Emme, S Nowak, F Pietsch, N Sander, C Schettler, H Schleper, P Schroder, M Schum, T Rougny, R Schwandt, J De Souza, SF Srivastava, AK Stadie, H Steinbruck, G Thomsen, J Wolf, R Bauer, J Buege, V Chwalek, T Daeuwel, D Selvaggi, M Orsini, L De Boer, W Dierlamm, A Dirkes, G Feindt, M Gruschke, J Hackstein, C Hartmann, F Heinrich, M Held, H Hoffmann, KH Perez, E Van Haevermaet, H Honc, S Kuhr, T Martschei, D Mueller, S Muller, T Neuland, MB Niegel, M Oberst, O Oehler, A Petrilli, A Ott, J Van Mechelen, P Peiffer, T Piparo, D Quast, G Rabbertz, K Ratnikov, F Renz, M Sabellek, A Saout, C Pfeiffer, A Scheurer, A Schieferdecker, P Van Remortel, N Schilling, FP Schott, G Simonis, HJ Stober, FM Troendle, D Wagner-Kuhr, J Zeise, M Milosevic, J Pierini, M Zhukov, V Ziebarth, EB Daskalakis, G Adler, V Geralis, T Kesisoglou, S Kyriakis, A Loukas, D Manolakos, I Markou, A Pimia, M Markou, C Mavrommatis, C Petrakou, E Gouskos, L Beauceron, S Mertzimekis, T Panagiotou, A Evangelou, I Foudas, C Kokkas, P Polese, G Manthos, N Papadopoulos, I Patras, V Triantis, FA Aranyi, A Blyweert, S Bencze, G Boldizsar, L Debreczeni, G Hajdu, C Racz, A Horvath, D Kapusi, A Krajczar, K Laszlo, A Sikler, F Vesztergombi, G D'Hondt, J Beni, N Molnar, J Palinkas, J Rolandi, G Szillasi, Z Veszpremi, V Raics, P Trocsanyi, ZL Ujvari, B Bansal, S Beri, SB Devroede, O Bhatnagar, V Jindal, M Rovelli, C Kaur, M Kohli, JM Mehta, MZ Nishu, N Saini, LK Sharma, A Sharma, R Singh, AP Kalogeropoulos, A Singh, JB Mundim, L Singh, SP Ahuja, S Bhattacharya, S Chauhan, S Choudhary, BC Gupta, P Jain, S Jain, S Kumar, A Maes, J Rovere, M Shivpuri, RK Choudhury, RK Dutta, D Kailas, S Kataria, SK Mohanty, AK Pant, LM Shukla, P Suggisetti, P Aziz, T Sakulin, H Maes, M Guchait, M Gurtu, A Maity, M Majumder, D Majumder, G Mazumdar, K Mohanty, GB Saha, A Sudhakar, K Schafer, C Wickramage, N Tavernier, S Banerjee, S Dugad, S Mondal, NK Arfaei, H Bakhshiansohi, H Etesami, SM Fahim, A Hashemi, M Aguilar-Benitez, M Schwick, C Jafari, A Khakzad, M Van Doninck, W Mohammadi, A Najafabadi, MM Mehdiabadi, SP Safarzadeh, B Zeinali, M Abbrescia, M Barbone, L Segoni, I Calabria, C Colaleo, A Creanza, D Van Mulders, P De Filippis, N De Palma, M Dimitrov, A Fedele, F Fiore, L Iaselli, G Sharma, A Lusito, L Maggi, G Maggi, M Manna, N Van Onsem, GP Marangelli, B My, S Nuzzo, S Pacifico, N Pierro, GA Siegrist, P Pompili, A Pugliese, G Romano, F Roselli, G Selvaggi, G Villella, I Silvestris, L Trentadue, R Tupputi, S Zito, G Simon, M Abbiendi, G Benvenuti, AC Bonacorsi, D Braibant-Giacomelli, S Capiluppi, P Castro, A Charaf, O Cavallo, FR Cuffiani, M Dallavalle, GM Sphicas, P Fabbri, F Fanfani, A Fasanella, D Giacomelli, P Giunta, M Grandi, C Marcellini, S Clerbaux, B Meneghelli, M Montanari, A Spiga, D Navarria, FL Odorici, F Perrotta, A Rossi, AM Rovelli, T Siroli, G Travaglini, R Albergo, S De Lentdecker, G Cappello, G Nogima, H Chiorboli, M Costa, S Tricomi, A Tuve, C Barbagli, G Broccolo, G Ciulli, V Civinini, C D'Alessandro, R Dero, V Spiropulu, M Focardi, E Frosali, S Gallo, E Genta, C Lenzi, P Meschini, M Paoletti, S Sguazzoni, G Tropiano, A Benussi, L Stockli, F Gay, APR Bianco, S Colafranceschi, S Fabbri, F Piccolo, D Fabbricatore, P Musenich, R Benaglia, A Cerati, GB De Guio, F Maestre, JA Stoye, M Di Matteo, L Hammad, GH Ghezzi, A Govoni, P Malberti, M Malvezzi, S Martelli, A Massironi, A Menasce, D Moroni, L Tropea, P Paganoni, M Pedrini, D Hreus, T Ragazzi, S Redaelli, N Sala, S de Fatis, TT Tancini, V Buontempo, S Montoya, CAC Tsirou, A Cimmino, A De Cosa, A De Gruttola, M Marage, PE Fabozzi, F Iorio, AOM Lista, L Noli, P Paolucci, P Azzi, P Veres, GI Bacchetta, N Bellan, P Bellato, M Branca, A Thomas, L Carlin, R De Mattia, M Dorigo, T Gasparini, F Gasparini, U Vichoudis, P Giubilato, P Gonella, F Gresele, A Gulmini, M Kaminskiy, A Velde, CV Lacaprara, S Lazzizzera, I Margoni, M Meneguzzo, AT Voutilainen, M Nespolo, M Pegoraro, M Perrozzi, L Pozzobon, N Ronchese, P Simonetto, F Vanlaer, P Torassa, E Tosi, M Triossi, A Zeuner, WD Vanini, S Zotto, P Baesso, P Berzano, U Riccardi, C Torre, P Vitulo, P Wickens, J Viviani, C Biasini, M Bertl, W Bilei, GM Caponeri, B Fano, L Lariccia, P Lucaroni, A Mantovani, G Menichelli, M Nappi, A Costantini, S Santocchia, A Oguri, V Servoli, L Taroni, S Valdata, M Volpe, R Azzurri, P Bagliesi, G Bernardini, J Boccali, T Castaldi, R Grunewald, M Deiters, K D'Agnolo, RT Dell'Orso, R Fiori, F Foa, L Giassi, A Kraan, A Ligabue, F Lomtadze, T Martini, L Messineo, A Arce, P Erdmann, W Klein, B Palla, F Palmonari, F Sarkar, S Segneri, G Serban, AT Spagnolo, P Tenchini, R Tonelli, G Venturi, A Gabathuler, K Verdini, PG Marinov, A Barone, L Cavallari, F Del Re, D Di Marco, E Diemoz, M Franci, D Grassi, M Longo, E Horisberger, R Organtini, G Palma, A Ryckbosch, D Pandolfi, F Paramatti, R Rahatlou, S Amapane, N Arcidiacono, R Argiro, S Arneodo, M Ingram, Q Biino, C Botta, C Cartiglia, N Thyssen, F Castello, R Costa, M Demaria, N Graziano, A Mariotti, C Marone, M Kaestli, HC Maselli, S Migliore, E Mila, G Monaco, V Tytgat, M Musich, M Obertino, MM Pastrone, N Pelliccioni, M Romero, A Konig, S Ruspa, M Sacchi, R Sola, V Solano, A Staiano, A Vanelderen, L Trocino, D Pereira, AV Ambroglini, F Belforte, S Kotlinski, D Cossutti, F Della Ricca, G Gobbo, B Montanino, D Penzo, A Heo, SG Verwilligen, P Chang, S Chung, J Kim, DH Langenegger, U Kim, GN Kim, JE Kong, DJ Park, H Son, D Son, DC Kim, Z Walsh, S Kim, JY Song, S Meier, F Choi, S Hong, B Jo, M Kim, H Kim, JH Kim, TJ Lee, KS Moon, DH Zaganidis, N Park, SK Goicochea, JMO Rhee, HB Seo, E Shin, S Sim, KS Choi, M Kang, S Kim, H Park, C Park, IC Basegmez, S Battilana, C Renker, D Park, S Ryu, G Choi, Y Choi, YK Goh, J Lee, J Lee, S Seo, H Yu, I Bilinskas, MJ Rohe, T Bruno, G Grigelionis, I Janulis, M Martisiute, D Petrov, P Sabonis, T Valdez, H Burelo, ED Lopez-Fernandez, R Sanchez-Fernandez, A Sibille, J Villasenor-Cendejas, LM Caudron, J Moreno, SC Valencia, FV Ibarguen, HAS Linares, EC Pineda, AM Reyes-Santos, MA Allfrey, P Krofcheck, D Starodumov, A Tam, J Butler, PH De Jeneret, JD Doesburg, R Silverwood, H Ahmad, M Ahmed, I Asghar, MI Hoorani, HR Khan, WA Caminada, L Khurshid, T Qazi, S Cwiok, M Delaere, C Dominik, W Doroba, K Kalinowski, A Konecki, M Krolikowski, J Frueboes, T Chen, Z Gokieli, R Gorski, M Kazana, M Nawrocki, K Demin, P Szleper, M Wrochna, G Zalewski, P Almeida, N David, A Cittolin, S Faccioli, P Parracho, PGF Gallinaro, M Martins, P Mini, G Favart, D Musella, P Nayak, A Raposo, L Ribeiro, PQ Dissertori, G Seixas, J Silva, P Soares, D Varela, J Wohri, HK Belotelov, I Giammanco, A Bunin, P Finger, M Finger, M Dittmar, M Golutvin, I Kamenev, A Karjavin, V Kozlov, G Lanev, A Moisenz, P Palichik, V Gregoire, G Perelygin, V Shmatov, S Eugster, J Smirnov, V Volodko, A Zarubin, A Bondar, N Golovtsov, V Ivanov, Y Kim, V Levchenko, P Hollar, J Murzin, V Calvo, E Da Silva, WLP Oreshkin, V Smirnov, I Sulimov, V Uvarov, L Vavilov, S Vorobyev, A Andreev, Y Gninenko, S Golubev, N Lemaitre, V Freudenreich, K Kirsanov, M Krasnikov, N Matveev, V Pashenkov, A Toropin, A Troitsky, S Epshteyn, V Gavrilov, V Kaftanov, V Kossov, M Grab, C Militaru, O Krokhotin, A Lychkovskaya, N Safronov, G Semenov, S Shreyber, I Stolin, V Vlasov, E Zhokin, A Boos, E Herve, A Dubinin, M Ovyn, S Dudko, L Ershov, A Gribushin, A Kodolova, O Lokhtin, I Obraztsov, S Petrushanko, S Sarycheva, L Hintz, W Savrin, V Snigirev, A Pagano, D Andreev, V Azarkin, M Dremin, I Kirakosyan, M Rusakov, SV Vinogradov, A Azhgirey, I Lecomte, P Bitioukov, S Grishin, V Kachanov, V Pin, A Konstantinov, D Krychkine, V Petrov, V Ryutin, R Slabospitsky, S Sobol, A Lustermann, W Tourtchanovitch, L Troshin, S Tyurin, N Uzunian, A Marchica, C del Arbol, PMR Meridiani, P Quertenmont, L Milenovic, P Santoro, A Moortgat, F Nardulli, A Nef, P Nessi-Tedaldi, F Pape, L Pauss, F Punz, T Rizzi, A Cepeda, M Ronga, FJ Sala, L Hansel, S Do Amaral, SMS Sanchez, AK Sawley, MC Stieger, B Tauscher, L Thea, A Theofilatos, K Cerrada, M Treille, D Urscheler, C Wallny, R Weber, M Sznajder, A Wehrli, L Weng, J Aguilo, E Amsler, C Chiochia, V Colino, N De Visscher, S Favaro, C Rikova, MI Jaeger, A Mejias, BM De Araujo, FTD Regenfus, C Robmann, P Rommerskirchen, T Schmidt, A De La Cruz, B Snoek, H Wilke, L Chang, YH Chen, KH Chen, WT Dutta, S Dias, FA Go, A Kuo, CM Li, SW Pardos, CD Lin, W Liu, MH Liu, ZK Lu, YJ Wu, JH Yu, SS Bartalini, P Dias, MAF Chang, P Chang, YH Bedoya, CF Chang, YW Chao, Y Chen, KF Hou, WS Hsiung, Y Kao, KY Lei, YJ Lu, RS Tomei, TRFP Shiu, JG Ramos, JPF Tzeng, YM Wang, M Wei, JT Adiguzel, A Bakirci, MN Cerci, S Demir, Z Dozen, C Dumanoglu, I Gregores, EM Ferrando, A Eskut, E Girgis, S Gokbulut, G Guler, Y Gurpinar, E Hos, I Kangal, EE Karaman, T Topaksu, AK Nart, A Flix, J Marinho, F Onengut, G Ozdemir, K Ozturk, S Polatoz, A Sogut, K Tali, B Topakli, H Uzun, D Vergili, LN Fouz, MC Vergili, M Novaes, SF Zorbilmez, C Akin, IV Aliev, T Bilmis, S Deniz, M Gamsizkan, H Guler, AM Ocalan, K Schul, N Ozpineci, A Serin, M Padula, SS Sever, R Surat, UE Yildirim, E Zeyrek, M Deliomeroglu, M Demir, D Gulmez, E Garcia-Abia, P Halu, A Isildak, B Kaya, M Hartl, C Darmenov, N Kaya, O Ozbek, M 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Sparrow, A Santaolalla, J Tapper, A Tourneur, S Tcholakov, V Acosta, MV Virdee, T Wakefield, S Wardrope, D Whyntie, T Barrett, M Chadwick, M Beliy, N Cole, JE Hobson, PR Khan, A Trayanov, R Kyberd, P Leslie, D Martin, W Reid, ID Teodorescu, L Hatakeyama, K Willmott, C Bose, T Jarrin, EC Clough, A Fantasia, C Hoch, M Vankov, I Heister, A St John, J Lawson, P Lazic, D Albajar, C Rohlf, J Sperka, D Sulak, L Avetisyan, A Bhattacharya, S Chou, JP Dyulendarova, M Cutts, D Esen, S Ferapontov, A Codispoti, G Heintz, U Jabeen, S Kukartsev, G Landsberg, G Narain, M Nguyen, D Segala, M Hadjiiska, R Speer, T Tsang, KV de Troconiz, JF Borgia, MA Breedon, R Sanchez, MCD Cebra, D Chertok, M Conway, J Cox, PT Dolen, J Kozhuharov, V Erbacher, R Cuevas, J Friis, E Ko, W Kopecky, A Lander, R Liu, H Maruyama, S Miceli, T Nikolic, M Pellett, D Litov, L Menendez, JF Robles, J Schwarz, T Searle, M Smith, J Squires, M Tripathi, M Sierra, RV Veelken, C Andreev, V Arisaka, K Folgueras, S Marinova, E Cline, D 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Keywords:	Phenomenology Distributions Collider Limit
Publication Date:	2010
Publisher:	American Physical Society
Citation:	Physical Review Letters 105(26): 262001, Dec 2010
Abstract:	A search for quark compositeness in the form of quark contact interactions, based on hadronic jet pairs (dijets) produced in proton-proton collisions at √s=7 TeV, is described. The data sample of the study corresponds to an integrated luminosity of 2.9 pb-1 collected with the CMS detector at the LHC. The dijet centrality ratio, which quantifies the angular distribution of the dijets, is measured as a function of the invariant mass of the dijet system and is found to agree with the predictions of the standard model. A statistical analysis of the data provides a lower limit on the energy scale of quark contact interactions. The sensitivity of the analysis is such that the expected limit is 2.9 TeV; because the observed value of the centrality ratio at high invariant mass is below the expectation, the observed limit is 4.0 TeV at the 95% confidence level.
Description:	This is the pre-print version of the Published Article which can be accessed from the link below.
URI:	http://prl.aps.org/abstract/PRL/v105/i26/e262001 http://bura.brunel.ac.uk/handle/2438/6091
DOI:	http://dx.doi.org/10.1103/PhysRevLett.105.262001
ISSN:	0031-9007
Appears in Collections:	School of Engineering and Design Research papers Publications

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