A Layer Correlation technique for pion energy calibration at the 2004 ATLAS Combined Beam Test

ArXiv 1012.4305 (2010)

Authors:

E Abat, JM Abdallah, TN Addy, P Adragna, M Aharrouche, A Ahmad, TPA Akesson, M Aleksa, C Alexa, K Anderson, A Andreazza, F Anghinolfi, A Antonaki, G Arabidze, E Arik, T Atkinson, J Baines, OK Baker, D Banfi, S Baron, AJ Barr, R Beccherle, HP Beck, B Belhorma, PJ Bell, D Benchekroun, DP Benjamin, K Benslama, E Bergeaas Kuutmann, J Bernabeu, H Bertelsen, S Binet, C Biscarat, V Boldea, VG Bondarenko, M Boonekamp, M Bosman, C Bourdarios, Z Broklova, D Burckhart Chromek, V Bychkov, J Callahan, D Calvet, M Canneri, M Capeáns Garrido, M Caprini, L Cardiel Sas, T Carli, L Carminati, J Carvalho, M Cascella, MV Castillo, A Catinaccio, D Cauz, D Cavalli, M Cavalli Sforza, V Cavasinni, SA Cetin, H Chen, R Cherkaoui, L Chevalier, F Chevallier, S Chouridou, M Ciobotaru, M Citterio, A Clark, B Cleland, M Cobal, E Cogneras, P Conde Muino, M Consonni, S Constantinescu, T Cornelissen, S Correard, A Corso Radu, G Costa, MJ Costa, D Costanzo, S Cuneo, P Cwetanski, D Da Silva, M Dam, M Dameri, HO Danielsson, D Dannheim, G Darbo, T Davidek, K De, PO Defay, B Dekhissi, J Del Peso, T Del Prete, M Delmastro, F Derue, L Di Ciaccio, B Di Girolamo, S Dita, F Dittus, F Djama, T Djobava, D Dobos, M Dobson, BA Dolgoshein, A Dotti, G Drake, Z Drasal, N Dressnandt, C Driouchi, J Drohan, WL Ebenstein, P Eerola, I Efthymiopoulos, K Egorov, TF Eifert, K Einsweiler, M El Kacimi, M Elsing, D Emelyanov, C Escobar, AI Etienvre, A Fabich, K Facius, AI Fakhr-Edine, M Fanti, A Farbin, P Farthouat, D Fassouliotis, L Fayard, R Febbraro, OL Fedin, A Fenyuk, D Fergusson, P Ferrari, R Ferrari, BC Ferreira, A Ferrer, D Ferrere, G Filippini, T Flick, D Fournier, P Francavilla, D Francis, R Froeschl, D Froidevaux, E Fullana, S Gadomski, G Gagliardi, P Gagnon, M Gallas, BJ Gallop, S Gameiro, KK Gan, R Garcia, C Garcia, IL Gavrilenko, C Gemme, P Gerlach, N Ghodbane, V Giakoumopoulou, V Giangiobbe, N Giokaris, G Glonti, T Goettfert, T Golling, N Gollub, A Gomes, MD Gomez, S Gonzalez-Sevilla, MJ Goodrick, G Gorfine, B Gorini, D Goujdami, K-J Grahn, P Grenier, N Grigalashvili, Y Grishkevich, J Grosse-Knetter, M Gruwe, C Guicheney, A Gupta, C Haeberli, R Haertel, Z Hajduk, H Hakobyan, M Hance, JD Hansen, PH Hansen, K Hara, A Harvey Jr, RJ Hawkings, FEW Heinemann, A Henriques Correia, T Henss, L Hervas, E Higon, JC Hill, J Hoffman, JY Hostachy, I Hruska, F Hubaut, F Huegging, W Hulsbergen, M Hurwitz, L Iconomidou-Fayard, E Jansen, I Jen-La Plante, PDC Johansson, K Jon-And, M Joos, S Jorgensen, J Joseph, A Kaczmarska, M Kado, A Karyukhin, M Kataoka, F Kayumov, A Kazarov, PT Keener, GD Kekelidze, N Kerschen, S Kersten, A Khomich, G Khoriauli, E Khramov, A Khristachev, J Khubua, TH Kittelmann, R Klingenberg, EB Klinkby, P Kodys, T Koffas, S Kolos, SP Konovalov, N Konstantinidis, S Kopikov, I Korolkov, V Kostyukhin, S Kovalenko, TZ Kowalski, K Krüger, V Kramarenko, LG Kudin, Y Kulchitsky, C Lacasta, R Lafaye, B Laforge, W Lampl, F Lanni, S Laplace, T Lari, A-C Le Bihan, M Lechowski, F Ledroit-Guillon, G Lehmann, R Leitner, D Lelas, CG Lester, Z Liang, P Lichard, W Liebig, A Lipniacka, M Lokajicek, L Louchard, KF Lourerio, A Lucotte, F Luehring, B Lund-Jensen, B Lundberg, H Ma, R Mackeprang, A Maio, VP Maleev, F Malek, L Mandelli, J Maneira, M Mangin-Brinet, A Manousakis, L Mapelli, C Marques, S Marti I Garcia, F Martin, M Mathes, M Mazzanti, KW McFarlane, R McPherson, G Mchedlidze, S Mehlhase, C Meirosu, Z Meng, C Meroni, V Mialkovski, B Mikulec, D Milstead, I Minashvili, B Mindur, VA Mitsou, S Moed, E Monnier, G Moorhead, P Morettini, SV Morozov, M Mosidze, SV Mouraviev, EWJ Moyse, A Munar, A Myagkov, AV Nadtochi, K Nakamura, P Nechaeva, A Negri, S Nemecek, M Nessi, SY Nesterov, FM Newcomer, I Nikitine, K Nikolaev, I Nikolic-Audit, H Ogren, SH Oh, SB Oleshko, J Olszowska, A Onofre, C Padilla Aranda, S Paganis, D Pallin, D Pantea, V Paolone, F Parodi, J Parsons, S Parzhitskiy, E Pasqualucci, SM Passmored, J Pater, S Patrichev, M Peez, V Perez Reale, L Perini, VD Peshekhonov, J Petersen, TC Petersen, R Petti, PW Phillips, J Pina, B Pinto, F Podlyski, L Poggioli, A Poppleton, J Poveda, P Pralavorio, L Pribyl, MJ Price, D Prieur, C Puigdengoles, P Puzo, O Røhne, F Ragusa, S Rajagopalan, K Reeves, I Reisinger, C Rembser, PA Bruckman de Renstrom, P Reznicek, M Ridel, P Risso, I Riu, D Robinson, C Roda, S Roe, O Rohne, A Romaniouk, D Rousseau, A Rozanov, A Ruiz, N Rusakovich, D Rust, YF Ryabov, V Ryjov, O Salto, B Salvachua, A Salzburger, H Sandaker, C Santamarina Rios, L Santi, C Santoni, JG Saraiva, F Sarri, G Sauvage, LP Says, M Schaefer, VA Schegelsky, C Schiavi, J Schieck, G Schlager, J Schlereth, C Schmitt, J Schultes, P Schwemling, J Schwindling, JM Seixas, DM Seliverstov, L Serin, A Sfyrla, N Shalanda, C Shaw, T Shin, A Shmeleva, J Silva, S Simion, M Simonyan, JE Sloper, S Yu Smirnov, L Smirnova, C Solans, A Solodkov, O Solovianov, I Soloviev, VV Sosnovtsev, F Spanó, P Speckmayer, S Stancu, R Stanek, E Starchenko, A Straessner, SI Suchkov, M Suk, R Szczygiel, F Tarrade, F Tartarelli, P Tas, Y Tayalati, F Tegenfeldt, R Teuscher, M Thioye, VO Tikhomirov, CJWP Timmermans, S Tisserant, B Toczek, L Tremblet, C Troncon, P Tsiareshka, M Tyndel, M Karagoez Unel, G Unal, G Unel, G Usai, R Van Berg, A Valero, S Valkar, JA Valls, W Vandelli, F Vannucci, A Vartapetian, VI Vassilakopoulos, L Vasilyeva, F Vazeille, F Vernocchi, Y Vetter-Cole, I Vichou, V Vinogradov, J Virzi, I Vivarelli, JB de Vivie, M Volpi, T Vu Anh, C Wang, M Warren, J Weber, M Weber, AR Weidberg, J Weingarten, PS Wells, P Werner, S Wheeler, M Wiessmann, H Wilkens, HH Williams, I Wingerter-Seez, Y Yasu, A Zaitsev, A Zenin, T Zenis, Z Zenonos, H Zhang, A Zhelezko, N Zhou

Abstract:

A new method for calibrating the hadron response of a segmented calorimeter is developed and successfully applied to beam test data. It is based on a principal component analysis of energy deposits in the calorimeter layers, exploiting longitudinal shower development information to improve the measured energy resolution. Corrections for invisible hadronic energy and energy lost in dead material in front of and between the calorimeters of the ATLAS experiment were calculated with simulated Geant4 Monte Carlo events and used to reconstruct the energy of pions impinging on the calorimeters during the 2004 Barrel Combined Beam Test at the CERN H8 area. For pion beams with energies between 20 GeV and 180 GeV, the particle energy is reconstructed within 3% and the energy resolution is improved by between 11% and 25% compared to the resolution at the electromagnetic scale.

Measurement of the inclusive isolated prompt photon cross section in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

ArXiv 1012.4389 (2010)

Search for Diphoton Events with Large Missing Transverse Energy in 7 TeV Proton-Proton Collisions with the ATLAS Detector

ArXiv 1012.4272 (2010)

Search for Quark Compositeness with the Dijet Centrality Ratio inppCollisions ats=7TeV

Physical Review Letters American Physical Society (APS) 105:26 (2010) 262001

Authors:

V Khachatryan, AM Sirunyan, A Tumasyan, W Adam, T Bergauer, M Dragicevic, J Erö, C Fabjan, M Friedl, R Frühwirth, VM Ghete, J Hammer, S Hänsel, C Hartl, M Hoch, N Hörmann, J Hrubec, M Jeitler, G Kasieczka, W Kiesenhofer, M Krammer, D Liko, I Mikulec, M Pernicka, H Rohringer, R Schöfbeck, J Strauss, A Taurok, F Teischinger, W Waltenberger, G Walzel, E Widl, C-E Wulz, V Mossolov, N Shumeiko, J Suarez Gonzalez, L Benucci, L Ceard, EA De Wolf, X Janssen, T Maes, L Mucibello, S Ochesanu, B Roland, R Rougny, M Selvaggi, H Van Haevermaet, P Van Mechelen, N Van Remortel, V Adler, S Beauceron, S Blyweert, J D’Hondt, O Devroede, A Kalogeropoulos, J Maes, M Maes, S Tavernier, W Van Doninck, P Van Mulders, GP Van Onsem, I Villella, O Charaf, B Clerbaux, G De Lentdecker, V Dero, APR Gay, GH Hammad, T Hreus, PE Marage, L Thomas, C Vander Velde, P Vanlaer, J Wickens, S Costantini, M Grunewald, B Klein, A Marinov, D Ryckbosch, F Thyssen, M Tytgat, L Vanelderen, P Verwilligen, S Walsh, N Zaganidis, S Basegmez, G Bruno, J Caudron, J De Favereau De Jeneret, C Delaere, P Demin, D Favart, A Giammanco, G Grégoire, J Hollar, V Lemaitre, O Militaru, S Ovyn, D Pagano, A Pin, K Piotrzkowski, L Quertenmont, N Schul, N Beliy, T Caebergs, E Daubie, GA Alves, D De JesusDamiao, ME Pol, MHG Souza, W Carvalho, EM Da Costa, C De Oliveira Martins, S Fonseca De Souza, L Mundim, H Nogima, V Oguri, JM Otalora Goicochea, WL Prado Da Silva, A Santoro, SM Silva Do Amaral, A Sznajder, F Torres Da Silva De Araujo, FA Dias, MAF Dias, TR Fernandez Perez Tomei, EM Gregores, F Marinho, SF Novaes, Sandra S Padula, N Darmenov, L Dimitrov, V Genchev, P Iaydjiev, S Piperov, M Rodozov, S Stoykova, G Sultanov, V Tcholakov, R Trayanov, I Vankov, M Dyulendarova, R Hadjiiska, V Kozhuharov, L Litov, E Marinova, M Mateev, B Pavlov, P Petkov, JG Bian, GM Chen, HS Chen, CH Jiang, D Liang, S Liang, J Wang, J Wang, X Wang, Z Wang, M Yang, J Zang, Z Zhang, Y Ban, S Guo, Z Hu, W Li, Y Mao, SJ Qian, H Teng, B Zhu, A Cabrera, B Gomez Moreno, AA Ocampo Rios, AF Osorio Oliveros, JC Sanabria, N Godinovic, D Lelas, K Lelas, R Plestina, D Polic, I Puljak, Z Antunovic, M Dzelalija, V Brigljevic, S Duric, K Kadija, S Morovic, A Attikis, R Fereos, M Galanti, J Mousa, C Nicolaou, F Ptochos, PA Razis, H Rykaczewski, A Abdel-basit, Y Assran, MA Mahmoud, A Hektor, M Kadastik, K Kannike, M Müntel, M Raidal, L Rebane, V Azzolini, P Eerola, S Czellar, J Härkönen, A Heikkinen, V Karimäki, R Kinnunen, J Klem, MJ Kortelainen, T Lampén, K Lassila-Perini, S Lehti, T Lindén, P Luukka, T Mäenpää, E Tuominen, J Tuominiemi, E Tuovinen, D Ungaro, L Wendland, K Banzuzi, A Korpela, T Tuuva, D Sillou, M Besancon, M Dejardin, D Denegri, B Fabbro, JL Faure, F Ferri, S Ganjour, FX Gentit, A Givernaud, P Gras, G Hamel de Monchenault, P Jarry, E Locci, J Malcles, M Marionneau, L Millischer, J Rander, A Rosowsky, M Titov, P Verrecchia, S Baffioni, L Bianchini, M Bluj, C Broutin, P Busson, C Charlot, L Dobrzynski, R Granier de Cassagnac, M Haguenauer, P Miné, C Mironov, C Ochando, P Paganini, D Sabes, R Salerno, Y Sirois, C Thiebaux, B Wyslouch, A Zabi, J-L Agram, J Andrea, A Besson, D Bloch, D Bodin, J-M Brom, M Cardaci, EC Chabert, C Collard, E Conte, F Drouhin, C Ferro, J-C Fontaine, D Gelé, U Goerlach, S Greder, P Juillot, M Karim, A-C Le Bihan, Y Mikami, P Van Hove, F Fassi, D Mercier, C Baty, N Beaupere, M Bedjidian, O Bondu, G Boudoul, D Boumediene, H Brun, N Chanon, R Chierici, D Contardo, P Depasse, H El Mamouni, A Falkiewicz, J Fay, S Gascon, B Ille, T Kurca, T Le Grand, M Lethuillier, L Mirabito, S Perries, V Sordini, S Tosi, Y Tschudi, P Verdier, H Xiao, V Roinishvili, G Anagnostou, M Edelhoff, L Feld, N Heracleous, O Hindrichs, R Jussen, K Klein, J Merz, N Mohr, A Ostapchuk, A Perieanu, F Raupach, J Sammet, S Schael, D Sprenger, H Weber, M Weber, B Wittmer, M Ata, W Bender, M Erdmann, J Frangenheim, T Hebbeker, A Hinzmann, K Hoepfner, C Hof, T Klimkovich, D Klingebiel, P Kreuzer, D Lanske, C Magass, G Masetti, M Merschmeyer, A Meyer, P Papacz, H Pieta, H Reithler, SA Schmitz, L Sonnenschein, J Steggemann, D Teyssier, M Bontenackels, M Davids, M Duda, G Flügge, H Geenen, M Giffels, W Haj Ahmad, D Heydhausen, T Kress, Y Kuessel, A Linn, A Nowack, L Perchalla, O Pooth, J Rennefeld, P Sauerland, A Stahl, M Thomas, D Tornier, MH Zoeller, M Aldaya Martin, W Behrenhoff, U Behrens, M Bergholz, K Borras, A Cakir, A Campbell, E Castro, D Dammann, G Eckerlin, D Eckstein, A Flossdorf, G Flucke, A Geiser, I Glushkov, J Hauk, H Jung, M Kasemann, I Katkov, P Katsas, C Kleinwort, H Kluge, A Knutsson, D Krücker, E Kuznetsova, W Lange, W Lohmann, R Mankel, M Marienfeld, I-A Melzer-Pellmann, AB Meyer, J Mnich, A Mussgiller, J Olzem, A Parenti, A Raspereza, A Raval, R Schmidt, T Schoerner-Sadenius, N Sen, M Stein, J Tomaszewska, D Volyanskyy, R Walsh, C Wissing, C Autermann, S Bobrovskyi, J Draeger, H Enderle, U Gebbert, K Kaschube, G Kaussen, R Klanner, B Mura, S Naumann-Emme, F Nowak, N Pietsch, C Sander, H Schettler, P Schleper, M Schröder, T Schum, J Schwandt, AK Srivastava, H Stadie, G Steinbrück, J Thomsen, R Wolf, J Bauer, V Buege, T Chwalek, D Daeuwel, W De Boer, A Dierlamm, G Dirkes, M Feindt, J Gruschke, C Hackstein, F Hartmann, M Heinrich, H Held, KH Hoffmann, S Honc, T Kuhr, D Martschei, S Mueller, Th Müller, MB Neuland, M Niegel, O Oberst, A Oehler, J Ott, T Peiffer, D Piparo, G Quast, K Rabbertz, F Ratnikov, M Renz, A Sabellek, C Saout, A Scheurer, P Schieferdecker, F-P Schilling, G Schott, HJ Simonis, FM Stober, D Troendle, J Wagner-Kuhr, M Zeise, V Zhukov, EB Ziebarth, G Daskalakis, T Geralis, S Kesisoglou, A Kyriakis, D Loukas, I Manolakos, A Markou, C Markou, C Mavrommatis, E Petrakou, L Gouskos, T Mertzimekis, A Panagiotou, I Evangelou, C Foudas, P Kokkas, N Manthos, I Papadopoulos, V Patras, FA Triantis, A Aranyi, G Bencze, L Boldizsar, G Debreczeni, C Hajdu, D Horvath, A Kapusi, K Krajczar, A Laszlo, F Sikler, G Vesztergombi, N Beni, J Molnar, J Palinkas, Z Szillasi, V Veszpremi, P Raics, ZL Trocsanyi, B Ujvari, S Bansal, SB Beri, V Bhatnagar, M Jindal, M Kaur, JM Kohli, MZ Mehta, N Nishu, LK Saini, A Sharma, R Sharma, AP Singh, JB Singh, SP Singh, S Ahuja, S Bhattacharya, S Chauhan, BC Choudhary, P Gupta, S Jain, S Jain, A Kumar, RK Shivpuri, RK Choudhury, D Dutta, S Kailas, SK Kataria, AK Mohanty, LM Pant, P Shukla, P Suggisetti, T Aziz, M Guchait, A Gurtu, M Maity, D Majumder, G Majumder, K Mazumdar, GB Mohanty, A Saha, K Sudhakar, N Wickramage, S Banerjee, S Dugad, NK Mondal, H Arfaei, H Bakhshiansohi, SM Etesami, A Fahim, M Hashemi, A Jafari, M Khakzad, A Mohammadi, M Mohammadi Najafabadi, S Paktinat Mehdiabadi, B Safarzadeh, M Zeinali, M Abbrescia, L Barbone, C Calabria, A Colaleo, D Creanza, N De Filippis, M De Palma, A Dimitrov, F Fedele, L Fiore, G Iaselli, L Lusito, G Maggi, M Maggi, N Manna, B Marangelli, S My, S Nuzzo, N Pacifico, GA Pierro, A Pompili, G Pugliese, F Romano, G Roselli, G Selvaggi, L Silvestris, R Trentadue, S Tupputi, G Zito, G Abbiendi, AC Benvenuti, D Bonacorsi, S Braibant-Giacomelli, P Capiluppi, A Castro, FR Cavallo, M Cuffiani, GM Dallavalle, F Fabbri, A Fanfani, D Fasanella, P Giacomelli, M Giunta, C Grandi, S Marcellini, M Meneghelli, A Montanari, FL Navarria, F Odorici, A Perrotta, AM Rossi, T Rovelli, G Siroli, R Travaglini, S Albergo, G Cappello, M Chiorboli, S Costa, A Tricomi, C Tuve, G Barbagli, G Broccolo, V Ciulli, C Civinini, R D’Alessandro, E Focardi, S Frosali, E Gallo, C Genta, P Lenzi, M Meschini, S Paoletti, G Sguazzoni, A Tropiano, L Benussi, S Bianco, S Colafranceschi, F Fabbri, D Piccolo, P Fabbricatore, R Musenich, A Benaglia, GB Cerati, F De Guio, L Di Matteo, A Ghezzi, P Govoni, M Malberti, S Malvezzi, A Martelli, A Massironi, D Menasce, L Moroni, M Paganoni, D Pedrini, S Ragazzi, N Redaelli, S Sala, T Tabarelli de Fatis, V Tancini, S Buontempo, CA Carrillo Montoya, A Cimmino, A De Cosa, M De Gruttola, F Fabozzi, AOM Iorio, L Lista, P Noli, P Paolucci, P Azzi, N Bacchetta, P Bellan, M Bellato, A Branca, R Carlin, M De Mattia, T Dorigo, F Gasparini, U Gasparini, P Giubilato, F Gonella, A Gresele, M Gulmini, A Kaminskiy, S Lacaprara, I Lazzizzera, M Margoni, AT Meneguzzo, M Nespolo, M Pegoraro, L Perrozzi, N Pozzobon, P Ronchese, F Simonetto, E Torassa, M Tosi, A Triossi, S Vanini, P Zotto, P Baesso, U Berzano, C Riccardi, P Torre, P Vitulo, C Viviani, M Biasini, GM Bilei, B Caponeri, L Fanò, P Lariccia, A Lucaroni, G Mantovani, M Menichelli, A Nappi, A Santocchia, L Servoli, S Taroni, M Valdata, R Volpe, P Azzurri, G Bagliesi, J Bernardini, T Boccali, R Castaldi, RT D’Agnolo, R Dell’Orso, F Fiori, L Foà, A Giassi, A Kraan, F Ligabue, T Lomtadze, L Martini, A Messineo, F Palla, F Palmonari, S Sarkar, G Segneri, AT Serban, P Spagnolo, R Tenchini, G Tonelli, A Venturi, PG Verdini, L Barone, F Cavallari, D Del Re, E Di Marco, M Diemoz, D Franci, M Grassi, E Longo, G Organtini, A Palma, F Pandolfi, R Paramatti, S Rahatlou, N Amapane, R Arcidiacono, S Argiro, M Arneodo, C Biino, C Botta, N Cartiglia, R Castello, M Costa, N Demaria, A Graziano, C Mariotti, M Marone, S Maselli, E Migliore, G Mila, V Monaco, M Musich, MM Obertino, N Pastrone, M Pelliccioni, A Romero, M Ruspa, R Sacchi, V Sola, A Solano, A Staiano, D Trocino, A Vilela Pereira, F Ambroglini, S Belforte, F Cossutti, G Della Ricca, B Gobbo, D Montanino, A Penzo, SG Heo, S Chang, J Chung, DH Kim, GN Kim, JE Kim, DJ Kong, H Park, D Son, DC Son, Zero Kim, JY Kim, S Song, S Choi, B Hong, M Jo, H Kim, JH Kim, TJ Kim, KS Lee, DH Moon, SK Park, HB Rhee, E Seo, S Shin, KS Sim, M Choi, S Kang, H Kim, C Park, IC Park, S Park, G Ryu, Y Choi, YK Choi, J Goh, J Lee, S Lee, H Seo, I Yu, MJ Bilinskas, I Grigelionis, M Janulis, D Martisiute, P Petrov, T Sabonis, H Castilla Valdez, E De La Cruz Burelo, R Lopez-Fernandez, A Sánchez Hernández, LM Villasenor-Cendejas, S Carrillo Moreno, F Vazquez Valencia, HA Salazar Ibarguen, E Casimiro Linares, A Morelos Pineda, MA Reyes-Santos, P 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Grogg, M Grothe, R Hall-Wilton, M Herndon, P Klabbers, J Klukas, A Lanaro, C Lazaridis, J Leonard, J Liu, D Lomidze, R Loveless, A Mohapatra, W Parker, D Reeder, I Ross, A Savin, WH Smith, J Swanson, M Weinberg

Search for quark compositeness with the dijet centrality ratio in pp collisions at √s=7TeV

Physical Review Letters 105:26 (2010)

Authors:

V Khachatryan, AM Sirunyan, A Tumasyan, W Adam, T Bergauer, M Dragicevic, J Erö, C Fabjan, M Friedl, R Frühwirth, VM Ghete, J Hammer, S Hänsel, C Hartl, M Hoch, N Hörmann, J Hrubec, M Jeitler, G Kasieczka, W Kiesenhofer, M Krammer, D Liko, I Mikulec, M Pernicka, H Rohringer, R Schöfbeck, J Strauss, A Taurok, F Teischinger, W Waltenberger, G Walzel, E Widl, CE Wulz, V Mossolov, N Shumeiko, J Suarez Gonzalez, L Benucci, L Ceard, EA De Wolf, X Janssen, T Maes, L Mucibello, S Ochesanu, B Roland, R Rougny, M Selvaggi, H Van Haevermaet, P Van Mechelen, N Van Remortel, V Adler, S Beauceron, S Blyweert, J D'Hondt, O Devroede, A Kalogeropoulos, J Maes, M Maes, S Tavernier, W Van Doninck, P Van Mulders, GP Van Onsem, I Villella, O Charaf, B Clerbaux, G De Lentdecker, V Dero, APR Gay, GH Hammad, T Hreus, PE Marage, L Thomas, C Vander Velde, P Vanlaer, J Wickens, S Costantini, M Grunewald, B Klein, A Marinov, D Ryckbosch, F Thyssen, M Tytgat, L Vanelderen, P Verwilligen, S Walsh, N Zaganidis, S Basegmez, G Bruno, J Caudron, J De Favereau De Jeneret, C Delaere, P Demin, D Favart, A Giammanco, G Grégoire, J Hollar, V Lemaitre, O Militaru, S Ovyn, D Pagano, A Pin

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=7TeV, is described. The data sample of the study corresponds to an integrated luminosity of 2.9pb⊃-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. © 2010 CERN, for the CMS Collaboration.