Search for pair production of first-generation scalar leptoquarks in pp collisions at √s = 7 TeV.
Phys Rev Lett 106:20 (2011) 201802
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, P Wagner, W Waltenberger, G Walzel, E Widl, C-E Wulz, V Mossolov, N Shumeiko, J Suarez Gonzalez, L Benucci, K Cerny, 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, S Beauceron, F Blekman, S Blyweert, J D'Hondt, O Devroede, R Gonzalez Suarez, 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, V Adler, S Costantini, M Grunewald, B Klein, A Marinov, J McCartin, D Ryckbosch, F Thyssen, M Tytgat, L Vanelderen, P Verwilligen, S Walsh, N Zaganidis, S Basegmez, G Bruno, J Caudron, L Ceard, J De Favereau De Jeneret, C Delaere, P Demin, D Favart, A Giammanco, G Grégoire, J Hollar, V Lemaitre, J Liao, O Militaru, S Ovyn, D Pagano, A Pin, K Piotrzkowski, N Schul, N Beliy, T Caebergs, E Daubie, GA Alves, D De Jesus Damiao, ME Pol, MHG Souza, W Carvalho, EM Da Costa, C De Oliveira Martins, S Fonseca De Souza, L Mundim, H Nogima, V Oguri, 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 Xu, M Yang, J Zang, Z Zhang, Y Ban, S Guo, Y Guo, W Li, Y Mao, SJ Qian, H Teng, L Zhang, B Zhu, W Zou, 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, M Galanti, J Mousa, C Nicolaou, F Ptochos, PA Razis, H Rykaczewski, 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, S Choudhury, 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, I Shreyber, M Titov, P Verrecchia, S Baffioni, F Beaudette, L Bianchini, M Bluj, C Broutin, P Busson, C Charlot, T Dahms, 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, L Megrelidze, V Roinishvili, D Lomidze, 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, J Lange, 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, C Barth, J Bauer, V Buege, T Chwalek, W De Boer, A Dierlamm, G Dirkes, M Feindt, J Gruschke, C Hackstein, F Hartmann, SM Heindl, M Heinrich, H Held, KH Hoffmann, S Honc, T Kuhr, D Martschei, S Mueller, Th Müller, M Niegel, O Oberst, A Oehler, J Ott, T Peiffer, D Piparo, G Quast, K Rabbertz, F Ratnikov, M Renz, 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 Ntomari, E Petrakou, L Gouskos, TJ 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, N Dhingra, R Gupta, M Jindal, M Kaur, JM Kohli, MZ Mehta, N Nishu, LK Saini, A Sharma, AP Singh, JB Singh, SP Singh, S Ahuja, S Bhattacharya, 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, 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, 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, L Brigliadori, P Capiluppi, A Castro, FR Cavallo, M Cuffiani, GM Dallavalle, F Fabbri, A Fanfani, D Fasanella, P Giacomelli, M Giunta, S Marcellini, M Meneghelli, A Montanari, FL Navarria, F Odorici, A Perrotta, F Primavera, AM Rossi, T Rovelli, G Siroli, R Travaglini, S Albergo, G Cappello, M Chiorboli, S Costa, A Tricomi, C Tuve, G Barbagli, V Ciulli, C Civinini, R D'Alessandro, E Focardi, S Frosali, E Gallo, C Genta, S Gonzi, 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, F De Guio, L Di Matteo, A Ghezzi, 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, 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Ulmer, SR Wagner, SL Zang, L Agostino, J Alexander, A Chatterjee, S Das, N Eggert, LJ Fields, LK Gibbons, B Heltsley, W Hopkins, A Khukhunaishvili, B Kreis, V Kuznetsov, G Nicolas Kaufman, JR Patterson, D Puigh, D Riley, A Ryd, X Shi, W Sun, WD Teo, J Thom, J Thompson, J Vaughan, Y Weng, L Winstrom, P Wittich, A Biselli, G Cirino, D Winn, S Abdullin, M Albrow, J Anderson, G Apollinari, M Atac, JA Bakken, S Banerjee, LAT Bauerdick, A Beretvas, J Berryhill, PC Bhat, I Bloch, F Borcherding, K Burkett, JN Butler, V Chetluru, HWK Cheung, F Chlebana, S Cihangir, M Demarteau, DP Eartly, VD Elvira, S Esen, I Fisk, J Freeman, Y Gao, E Gottschalk, D Green, K Gunthoti, O Gutsche, A Hahn, J Hanlon, RM Harris, J Hirschauer, B Hooberman, E James, H Jensen, M Johnson, U Joshi, R Khatiwada, B Kilminster, B Klima, K Kousouris, S Kunori, S Kwan, C Leonidopoulos, P Limon, R Lipton, J Lykken, K Maeshima, JM Marraffino, D Mason, P McBride, T McCauley, T Miao, K Mishra, S Mrenna, Y Musienko, C Newman-Holmes, V O'Dell, S Popescu, R Pordes, O Prokofyev, N Saoulidou, E Sexton-Kennedy, S Sharma, A Soha, WJ Spalding, L Spiegel, P Tan, L Taylor, S Tkaczyk, L Uplegger, EW Vaandering, R Vidal, J Whitmore, W Wu, F Yang, F Yumiceva, JC Yun, D Acosta, P Avery, D Bourilkov, M Chen, GP Di Giovanni, D Dobur, A Drozdetskiy, RD Field, M Fisher, Y Fu, IK Furic, J Gartner, S Goldberg, B Kim, S Klimenko, J Konigsberg, A Korytov, A Kropivnitskaya, T Kypreos, K Matchev, G Mitselmakher, L Muniz, Y Pakhotin, C Prescott, R Remington, M Schmitt, B Scurlock, P Sellers, N Skhirtladze, D Wang, J Yelton, M Zakaria, C Ceron, V Gaultney, L Kramer, LM Lebolo, S Linn, P Markowitz, G Martinez, JL Rodriguez, T Adams, A Askew, D Bandurin, J Bochenek, J Chen, B Diamond, SV Gleyzer, J Haas, S Hagopian, V Hagopian, M Jenkins, KF Johnson, H Prosper, L Quertenmont, S Sekmen, V Veeraraghavan, MM Baarmand, B Dorney, S Guragain, M Hohlmann, H Kalakhety, R Ralich, I Vodopiyanov, MR Adams, IM Anghel, L Apanasevich, Y Bai, VE Bazterra, RR Betts, J Callner, R Cavanaugh, C Dragoiu, EJ Garcia-Solis, L Gauthier, CE Gerber, DJ Hofman, S Khalatyan, F Lacroix, M Malek, C O'Brien, C Silvestre, A Smoron, D Strom, N Varelas, U Akgun, EA Albayrak, B Bilki, K Cankocak, W Clarida, F Duru, CK Lae, E McCliment, J-P Merlo, H Mermerkaya, A Mestvirishvili, A Moeller, J Nachtman, CR Newsom, E Norbeck, J Olson, Y Onel, F Ozok, S Sen, J Wetzel, T Yetkin, K Yi, BA Barnett, B Blumenfeld, A Bonato, C Eskew, D Fehling, G Giurgiu, AV Gritsan, ZJ Guo, G Hu, P Maksimovic, S Rappoccio, M Swartz, NV Tran, A Whitbeck, P Baringer, A Bean, G Benelli, O Grachov, M Murray, D Noonan, V Radicci, S Sanders, JS Wood, V Zhukova, T Bolton, I Chakaberia, A Ivanov, M Makouski, Y Maravin, S Shrestha, I Svintradze, Z Wan, J Gronberg, D Lange, D Wright, A Baden, M Boutemeur, SC Eno, D Ferencek, JA Gomez, NJ Hadley, RG Kellogg, M Kirn, Y Lu, AC Mignerey, K Rossato, P Rumerio, F Santanastasio, A Skuja, J Temple, MB Tonjes, SC Tonwar, E Twedt, B Alver, G Bauer, J Bendavid, W Busza, E Butz, IA Cali, M Chan, V Dutta, P Everaerts, G Gomez Ceballos, M Goncharov, KA Hahn, P Harris, Y Kim, M Klute, Y-J Lee, W Li, C Loizides, PD Luckey, T Ma, S Nahn, C Paus, D Ralph, C Roland, G Roland, M Rudolph, GSF Stephans, K Sumorok, K Sung, EA Wenger, S Xie, M Yang, Y Yilmaz, AS Yoon, M Zanetti, P Cole, SI Cooper, P Cushman, B Dahmes, A De Benedetti, PR Dudero, G Franzoni, J Haupt, K Klapoetke, Y Kubota, J Mans, V Rekovic, R Rusack, M Sasseville, A Singovsky, LM Cremaldi, R Godang, R Kroeger, L Perera, R Rahmat, DA Sanders, D Summers, K Bloom, S Bose, J Butt, DR Claes, A Dominguez, M Eads, J Keller, T Kelly, I Kravchenko, J Lazo-Flores, C Lundstedt, H Malbouisson, S Malik, GR Snow, U Baur, A Godshalk, I Iashvili, S Jain, A Kharchilava, A Kumar, SP Shipkowski, K Smith, G Alverson, E Barberis, D Baumgartel, O Boeriu, M Chasco, S Reucroft, J Swain, D Wood, J Zhang, A Anastassov, A Kubik, N Odell, RA Ofierzynski, B Pollack, A Pozdnyakov, M Schmitt, S Stoynev, M Velasco, S Won, L Antonelli, D Berry, M Hildreth, C Jessop, DJ Karmgard, J Kolb, T Kolberg, K Lannon, W Luo, S Lynch, N Marinelli, DM Morse, T Pearson, R Ruchti, J Slaunwhite, N Valls, J Warchol, M Wayne, J Ziegler, B Bylsma, LS Durkin, J Gu, C Hill, P Killewald, K Kotov, TY Ling, M Rodenburg, G Williams, N Adam, E Berry, P Elmer, D Gerbaudo, V Halyo, P Hebda, A Hunt, J Jones, E Laird, D Lopes Pegna, D Marlow, T Medvedeva, M Mooney, J Olsen, P Piroué, X Quan, H Saka, D Stickland, C Tully, JS Werner, A Zuranski, JG Acosta, XT Huang, A Lopez, H Mendez, S Oliveros, JE Ramirez Vargas, A Zatserklyaniy, E Alagoz, VE Barnes, G Bolla, L Borrello, D Bortoletto, A Everett, AF Garfinkel, Z Gecse, L Gutay, Z Hu, M Jones, O Koybasi, M Kress, AT Laasanen, N Leonardo, C Liu, V Maroussov, P Merkel, DH Miller, N Neumeister, I Shipsey, D Silvers, A Svyatkovskiy, HD Yoo, J Zablocki, Y Zheng, P Jindal, N Parashar, C Boulahouache, V Cuplov, KM Ecklund, FJM Geurts, JH Liu, BP Padley, R Redjimi, J Roberts, J Zabel, B Betchart, A Bodek, YS Chung, R Covarelli, P de Barbaro, R Demina, Y Eshaq, H Flacher, A Garcia-Bellido, P Goldenzweig, Y Gotra, J Han, A Harel, DC Miner, D Orbaker, G Petrillo, D Vishnevskiy, M Zielinski, A Bhatti, R Ciesielski, L Demortier, K Goulianos, G Lungu, C Mesropian, M Yan, O Atramentov, A Barker, D Duggan, Y Gershtein, R Gray, E Halkiadakis, D Hidas, D Hits, A Lath, S Panwalkar, R Patel, A Richards, K Rose, S Schnetzer, S Somalwar, R Stone, S Thomas, G Cerizza, M Hollingsworth, S Spanier, ZC Yang, A York, J Asaadi, R Eusebi, J Gilmore, A Gurrola, T Kamon, V Khotilovich, R Montalvo, CN Nguyen, I Osipenkov, J Pivarski, A Safonov, S Sengupta, A Tatarinov, D Toback, M Weinberger, N Akchurin, C Bardak, J Damgov, C Jeong, K Kovitanggoon, SW Lee, P Mane, Y Roh, A Sill, I Volobouev, R Wigmans, E Yazgan, E Appelt, E Brownson, D Engh, C Florez, W Gabella, W Johns, P Kurt, C Maguire, A Melo, P Sheldon, S Tuo, J Velkovska, MW Arenton, M Balazs, S Boutle, M Buehler, S Conetti, B Cox, B Francis, R Hirosky, A Ledovskoy, C Lin, C Neu, R Yohay, S Gollapinni, R Harr, PE Karchin, P Lamichhane, M Mattson, C Milstène, A Sakharov, M Anderson, M Bachtis, JN Bellinger, D Carlsmith, S Dasu, J Efron, L Gray, KS Grogg, M Grothe, R Hall-Wilton, M Herndon, P Klabbers, J Klukas, A Lanaro, C Lazaridis, J Leonard, R Loveless, A Mohapatra, D Reeder, I Ross, A Savin, WH Smith, J Swanson, M Weinberg, CMS CollaborationAbstract:
A search for pair production of first-generation scalar leptoquarks is performed in the final state containing two electrons and two jets using proton-proton collision data at √s = 7 TeV. The data sample used corresponds to an integrated luminosity of 33 pb⁻¹ collected with the CMS detector at the CERN LHC. The number of observed events is in good agreement with the predictions for the standard model background processes, and an upper limit is set on the leptoquark pair production cross section times β² as a function of the leptoquark mass, where β is the branching fraction of the leptoquark decay to an electron and a quark. A 95% confidence level lower limit is set on the mass of a first-generation scalar leptoquark at 384 GeV for β = 1, which is the most stringent direct limit to date.Measurement of dijet angular distributions and search for quark compositeness in pp collisions at √s=7TeV
Physical Review Letters 106:20 (2011)
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, P Wagner, W Waltenberger, G Walzel, E Widl, CE Wulz, V Mossolov, N Shumeiko, J Suarez Gonzalez, L Benucci, K Cerny, 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, S Beauceron, F Blekman, S Blyweert, J D'hondt, O Devroede, R Gonzalez Suarez, 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, V Adler, S Costantini, M Grunewald, B Klein, A Marinov, J Mccartin, D Ryckbosch, F Thyssen, M Tytgat, L Vanelderen, P Verwilligen, S Walsh, N Zaganidis, S Basegmez, G Bruno, J Caudron, L Ceard, J De Favereau De Jeneret, C Delaere, P Demin, D Favart, A Giammanco, G Grégoire, J HollarAbstract:
Dijet angular distributions are measured over a wide range of dijet invariant masses in pp collisions at √s=7TeV, at the CERN LHC. The event sample, recorded with the CMS detector, corresponds to an integrated luminosity of 36pb-1. The data are found to be in good agreement with the predictions of perturbative QCD, and yield no evidence of quark compositeness. With a modified frequentist approach, a lower limit on the contact interaction scale for left-handed quarks of Λ+=5.6TeV (Λ -=6.7TeV) for destructive (constructive) interference is obtained at the 95% confidence level. © 2011 American Physical Society.Search for supersymmetry in events with a lepton, a photon, and large missing transverse energy in pp collisions at sqrt(s) = 7 TeV
ArXiv 1105.3152 (2011)
Measurement of W-gamma and Z-gamma production in pp collisions at sqrt(s) = 7 TeV
ArXiv 1105.2758 (2011)
Search for production of heavy particles decaying to top quarks and invisible particles in pp collisions at √s = 1.96 TeV.
Phys Rev Lett 106:19 (2011) 191801