Measurement of the W ±Z production cross section and limits on anomalous triple gauge couplings in proton-proton collisions at s=7 TeV with the ATLAS detector

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 709:4-5 (2012) 341-357

Authors:

G Aad, B Abbott, J Abdallah, AA Abdelalim, A Abdesselam, O Abdinov, B Abi, M Abolins, H Abramowicz, H Abreu, E Acerbi, BS Acharya, DL Adams, TN Addy, J Adelman, M Aderholz, S Adomeit, P Adragna, T Adye, S Aefsky, JA Aguilar-Saavedra, M Aharrouche, SP Ahlen, F Ahles, A Ahmad, M Ahsan, G Aielli, T Akdogan, TPA Åkesson, G Akimoto, AV Akimov, A Akiyama, MS Alam, MA Alam, J Albert, S Albrand, M Aleksa, IN Aleksandrov, F Alessandria, C Alexa, G Alexander, G Alexandre, T Alexopoulos, M Alhroob, M Aliev, G Alimonti, J Alison, M Aliyev, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, R Alon, A Alonso, B Alvarez Gonzalez, MG Alviggi, K Amako, P Amaral, C Amelung, VV Ammosov, A Amorim, G Amorós, N Amram, C Anastopoulos, LS Ancu, N Andari, T Andeen, CF Anders, G Anders, KJ Anderson, A Andreazza, V Andrei, ML Andrieux, XS Anduaga, A Angerami, F Anghinolfi, A Anisenkov, N Anjos, A Annovi, A Antonaki, M Antonelli, A Antonov, J Antos, F Anulli, S Aoun, L Aperio Bella, R Apolle, G Arabidze, I Aracena, Y Arai, ATH Arce, JP Archambault, S Arfaoui, JF Arguin, E Arik, M Arik, AJ Armbruster, O Arnaez, A Artamonov, G Artoni

Abstract:

This Letter presents a measurement of W ±Z production in 1.02 fb -1 of pp collision data at s=7 TeV collected by the ATLAS experiment in 2011. Doubly leptonic decay events are selected with electrons, muons and missing transverse momentum in the final state. In total 71 candidates are observed, with a background expectation of 12.1±1.4(stat.)-2.0+4.1(syst.) events. The total cross section for W ±Z production for Z/γ * masses within the range 66 GeV to 116 GeV is determined to be σWZtot=20.5-2.8+3.1(stat.)-1.3+1.4(syst.)-0.8+0.9(lumi.) pb, which is consistent with the Standard Model expectation of 17.30.8+1.3 pb. Limits on anomalous triple gauge boson couplings are extracted. © 2012 CERN.

Search for strong gravity signatures in same-sign dimuon final states using the ATLAS detector at the LHC

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 709:4-5 (2012) 322-340

Authors:

G Aad, B Abbott, J Abdallah, AA Abdelalim, A Abdesselam, O Abdinov, B Abi, M Abolins, H Abramowicz, H Abreu, E Acerbi, BS Acharya, DL Adams, TN Addy, J Adelman, M Aderholz, S Adomeit, P Adragna, T Adye, S Aefsky, JA Aguilar-Saavedra, M Aharrouche, SP Ahlen, F Ahles, A Ahmad, M Ahsan, G Aielli, T Akdogan, TPA Åkesson, G Akimoto, AV Akimov, A Akiyama, MS Alam, MA Alam, J Albert, S Albrand, M Aleksa, IN Aleksandrov, F Alessandria, C Alexa, G Alexander, G Alexandre, T Alexopoulos, M Alhroob, M Aliev, G Alimonti, J Alison, M Aliyev, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, R Alon, A Alonso, B Alvarez Gonzalez, MG Alviggi, K Amako, P Amaral, C Amelung, VV Ammosov, A Amorim, G Amorós, N Amram, C Anastopoulos, LS Ancu, N Andari, T Andeen, CF Anders, G Anders, KJ Anderson, A Andreazza, V Andrei, ML Andrieux, XS Anduaga, A Angerami, F Anghinolfi, N Anjos, A Annovi, A Antonaki, M Antonelli, A Antonov, J Antos, F Anulli, S Aoun, L Aperio Bella, R Apolle, G Arabidze, I Aracena, Y Arai, ATH Arce, JP Archambault, S Arfaoui, JF Arguin, E Arik, M Arik, AJ Armbruster, O Arnaez, A Artamonov, G Artoni, D Arutinov

Abstract:

A search for microscopic black holes has been performed in a same-sign dimuon final state using 1.3 fb -1 of proton-proton collision data collected with the ATLAS detector at a centre of mass energy of 7 TeV at the CERN Large Hadron Collider. The data are found to be consistent with the expectation from the Standard Model and the results are used to derive exclusion contours in the context of a low scale gravity model. © 2012 CERN.

Measurement of the inclusive jet cross section in pp̄ collisions at √s=1.96TeV

Physical Review D - Particles, Fields, Gravitation and Cosmology 85:5 (2012)

Authors:

VM Abazov, B Abbott, BS Acharya, M Adams, T Adams, GD Alexeev, G Alkhazov, A Alton, G Alverson, GA Alves, M Aoki, A Askew, B Åsman, S Atkins, O Atramentov, K Augsten, C Avila, J Backusmayes, F Badaud, L Bagby, B Baldin, DV Bandurin, S Banerjee, E Barberis, P Baringer, J Barreto, JF Bartlett, U Bassler, V Bazterra, A Bean, M Begalli, C Belanger-Champagne, L Bellantoni, SB Beri, G Bernardi, R Bernhard, I Bertram, M Besançon, R Beuselinck, VA Bezzubov, PC Bhat, V Bhatnagar, G Blazey, S Blessing, K Bloom, A Boehnlein, D Boline, EE Boos, G Borissov, T Bose, A Brandt, O Brandt, R Brock, G Brooijmans, A Bross, D Brown, J Brown, XB Bu, M Buehler, V Buescher, V Bunichev, S Burdin, TH Burnett, CP Buszello, B Calpas, E Camacho-Pérez, MA Carrasco-Lizarraga, BCK Casey, H Castilla-Valdez, S Chakrabarti, D Chakraborty, KM Chan, A Chandra, E Chapon, G Chen, S Chevalier-Théry, DK Cho, SW Cho, S Choi, B Choudhary, S Cihangir, D Claes, J Clutter, M Cooke, WE Cooper, M Corcoran, F Couderc, MC Cousinou, A Croc, D Cutts, A Das, G Davies, K De, SJ De Jong, E De La Cruz-Burelo, F Déliot, R Demina, D Denisov, SP Denisov, S Desai

Abstract:

We present a measurement of the inclusive jet cross section using the Run II cone algorithm and data collected by the D0 experiment in pp̄ collisions at a center-of-mass energy √s=1.96TeV, corresponding to an integrated luminosity of 0.70fb -1. The jet energy calibration and the method used to extract the inclusive jet cross section are described. We discuss the main uncertainties, which are dominated by the jet energy scale uncertainty. The results cover jet transverse momenta from 50GeV to 600GeV with jet rapidities in the range -2.4 to 2.4 and are compared to predictions using recent proton parton distribution functions. Studies of correlations between systematic uncertainties in transverse momentum and rapidity are presented. © 2012 American Physical Society.

Assessing luminosity correlations via cluster analysis: Evidence for dual tracks in the radio/X-ray domain of black hole X-ray binaries

(2012)

Authors:

Elena Gallo, Brendan Miller, Rob Fender

Search for the standard model Higgs boson in the decay channel H→ZZ→4ℓ in pp collisions at √s=7 TeV.

Phys Rev Lett 108:11 (2012) 111804

Authors:

S Chatrchyan, V Khachatryan, AM Sirunyan, A Tumasyan, W Adam, T Bergauer, M Dragicevic, J Erö, C Fabjan, M Friedl, R Frühwirth, VM Ghete, J Hammer, M Hoch, N Hörmann, J Hrubec, M Jeitler, W Kiesenhofer, M Krammer, D Liko, I Mikulec, M Pernicka, B Rahbaran, C Rohringer, 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, S Bansal, L Benucci, T Cornelis, EA De Wolf, X Janssen, S Luyckx, T Maes, L Mucibello, S Ochesanu, B Roland, R Rougny, M Selvaggi, H Van Haevermaet, P Van Mechelen, N Van Remortel, A Van Spilbeeck, F Blekman, S Blyweert, J D'Hondt, R Gonzalez Suarez, A Kalogeropoulos, M Maes, A Olbrechts, 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, A Léonard, PE Marage, L Thomas, C Vander Velde, P Vanlaer, J Wickens, V Adler, K Beernaert, A Cimmino, S Costantini, G Garcia, M Grunewald, B Klein, J Lellouch, A Marinov, J McCartin, AA Ocampo Rios, D Ryckbosch, N Strobbe, F Thyssen, M Tytgat, L Vanelderen, P Verwilligen, S Walsh, E Yazgan, N Zaganidis, S Basegmez, G Bruno, L Ceard, J De Favereau De Jeneret, C Delaere, T du Pree, D Favart, L Forthomme, A Giammanco, G Grégoire, J Hollar, V Lemaitre, J Liao, O Militaru, C Nuttens, D Pagano, A Pin, K Piotrzkowski, N Schul, N Beliy, T Caebergs, E Daubie, GA Alves, M Correa Martins Junior, D De Jesus Damiao, T Martins, ME Pol, MHG Souza, WL Aldá Júnior, W Carvalho, A Custódio, EM Da Costa, C De Oliveira Martins, S Fonseca De Souza, D Matos Figueiredo, L Mundim, H Nogima, V Oguri, WL Prado Da Silva, A Santoro, SM Silva Do Amaral, L Soares Jorge, A Sznajder, TS Anjos, CA Bernardes, FA Dias, TR Fernandez Perez Tomei, EM Gregores, C Lagana, F Marinho, PG Mercadante, SF Novaes, Sandra S Padula, V Genchev, P Iaydjiev, S Piperov, M Rodozov, S Stoykova, G Sultanov, V Tcholakov, R Trayanov, M Vutova, A Dimitrov, R Hadjiiska, A Karadzhinova, V Kozhuharov, L Litov, B Pavlov, P Petkov, JG Bian, GM Chen, HS Chen, CH Jiang, D Liang, S Liang, X Meng, J Tao, J Wang, J Wang, X Wang, Z Wang, H Xiao, M Xu, J Zang, Z Zhang, C Asawatangtrakuldee, Y Ban, S Guo, Y Guo, W Li, S Liu, Y Mao, SJ Qian, H Teng, S Wang, B Zhu, W Zou, A Cabrera, B Gomez Moreno, AF Osorio Oliveros, JC Sanabria, N Godinovic, D Lelas, R Plestina, D Polic, I Puljak, Z Antunovic, M Dzelalija, M Kovac, V Brigljevic, S Duric, K Kadija, J Luetic, S Morovic, A Attikis, M Galanti, J Mousa, C Nicolaou, F Ptochos, PA Razis, M Finger, M Finger, Y Assran, A Ellithi Kamel, S Khalil, MA Mahmoud, A Radi, A Hektor, M Kadastik, M Müntel, M Raidal, L Rebane, A Tiko, V Azzolini, P Eerola, G Fedi, M Voutilainen, S Czellar, J Härkönen, A Heikkinen, V Karimäki, R Kinnunen, MJ Kortelainen, T Lampén, K Lassila-Perini, S Lehti, T Lindén, P Luukka, T Mäenpää, T Peltola, 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, A Givernaud, P Gras, G Hamel de Monchenault, P Jarry, E Locci, J Malcles, L Millischer, J Rander, A Rosowsky, I Shreyber, M Titov, S Baffioni, F Beaudette, L Benhabib, L Bianchini, M Bluj, C Broutin, P Busson, C Charlot, N Daci, T Dahms, L Dobrzynski, S Elgammal, R Granier de Cassagnac, M Haguenauer, P Miné, C Mironov, C Ochando, P Paganini, D Sabes, R Salerno, Y Sirois, C Thiebaux, C Veelken, A Zabi, J-L Agram, J Andrea, 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, P Juillot, M Karim, A-C Le Bihan, P Van Hove, F Fassi, D Mercier, C Baty, S Beauceron, N Beaupere, M Bedjidian, O Bondu, G Boudoul, D Boumediene, H Brun, J Chasserat, R Chierici, D Contardo, P Depasse, H El Mamouni, A Falkiewicz, J Fay, S Gascon, M Gouzevitch, B Ille, T Kurca, T Le Grand, M Lethuillier, L Mirabito, S Perries, V Sordini, S Tosi, Y Tschudi, P Verdier, S Viret, D Lomidze, G Anagnostou, S Beranek, M Edelhoff, L Feld, N Heracleous, O Hindrichs, R Jussen, K Klein, J Merz, A Ostapchuk, A Perieanu, F Raupach, J Sammet, S Schael, D Sprenger, H Weber, B Wittmer, V Zhukov, M Ata, J Caudron, E Dietz-Laursonn, M Erdmann, A Güth, T Hebbeker, C Heidemann, K Hoepfner, T Klimkovich, D Klingebiel, P Kreuzer, D Lanske, J Lingemann, C Magass, M Merschmeyer, A Meyer, M Olschewski, P Papacz, H Pieta, H Reithler, SA Schmitz, L Sonnenschein, J Steggemann, D Teyssier, M Weber, M Bontenackels, V Cherepanov, M Davids, G Flügge, H Geenen, M Geisler, W Haj Ahmad, F Hoehle, B Kargoll, T Kress, Y Kuessel, A Linn, A Nowack, L Perchalla, O Pooth, J Rennefeld, P Sauerland, A Stahl, MH Zoeller, M Aldaya Martin, W Behrenhoff, U Behrens, M Bergholz, A Bethani, K Borras, A Burgmeier, A Cakir, L Calligaris, A Campbell, E Castro, D Dammann, G Eckerlin, D Eckstein, A Flossdorf, G Flucke, A Geiser, J Hauk, H Jung, M Kasemann, P Katsas, C Kleinwort, H Kluge, A Knutsson, M Krämer, D Krücker, E Kuznetsova, W Lange, W Lohmann, B Lutz, R Mankel, I Marfin, M Marienfeld, I-A Melzer-Pellmann, AB Meyer, J Mnich, A Mussgiller, S Naumann-Emme, J Olzem, A Petrukhin, D Pitzl, A Raspereza, PM Ribeiro Cipriano, M Rosin, J Salfeld-Nebgen, R Schmidt, T Schoerner-Sadenius, N Sen, A Spiridonov, M Stein, J Tomaszewska, R Walsh, C Wissing, C Autermann, V Blobel, S Bobrovskyi, J Draeger, H Enderle, J Erfle, U Gebbert, M Görner, T Hermanns, RS Höing, K Kaschube, G Kaussen, H Kirschenmann, R Klanner, J Lange, B Mura, F Nowak, N Pietsch, C Sander, H Schettler, P Schleper, E Schlieckau, A Schmidt, M Schröder, T Schum, H Stadie, G Steinbrück, J Thomsen, C Barth, J Berger, T Chwalek, W De Boer, A Dierlamm, G Dirkes, M Feindt, J Gruschke, M Guthoff, C Hackstein, F Hartmann, M Heinrich, H Held, KH Hoffmann, S Honc, I Katkov, JR Komaragiri, T Kuhr, D Martschei, S Mueller, Th Müller, M Niegel, A Nürnberg, O Oberst, A Oehler, J Ott, T Peiffer, G Quast, K Rabbertz, F Ratnikov, N Ratnikova, M Renz, S Röcker, C Saout, A Scheurer, P Schieferdecker, F-P Schilling, M Schmanau, G Schott, HJ Simonis, FM Stober, D Troendle, J Wagner-Kuhr, T Weiler, M Zeise, EB Ziebarth, G Daskalakis, T Geralis, S Kesisoglou, A Kyriakis, D Loukas, I Manolakos, A Markou, C Markou, C Mavrommatis, E Ntomari, L Gouskos, TJ Mertzimekis, A Panagiotou, N Saoulidou, E Stiliaris, I Evangelou, C Foudas, P Kokkas, N Manthos, I Papadopoulos, V Patras, FA Triantis, A Aranyi, G Bencze, L Boldizsar, C Hajdu, P Hidas, D Horvath, A Kapusi, K Krajczar, F Sikler, V Veszpremi, G Vesztergombi, N Beni, J Molnar, J Palinkas, Z Szillasi, J Karancsi, P Raics, ZL Trocsanyi, B Ujvari, SB Beri, V Bhatnagar, N Dhingra, R Gupta, M Jindal, M Kaur, JM Kohli, MZ Mehta, N Nishu, LK Saini, A Sharma, AP Singh, J Singh, SP Singh, S Ahuja, BC Choudhary, A Kumar, A Kumar, S Malhotra, M Naimuddin, K Ranjan, V Sharma, RK Shivpuri, S Banerjee, S Bhattacharya, S Dutta, B Gomber, S Jain, S Jain, R Khurana, S Sarkar, RK Choudhury, D Dutta, S Kailas, V Kumar, AK Mohanty, LM Pant, P Shukla, T Aziz, S Ganguly, M Guchait, A Gurtu, M Maity, G Majumder, K Mazumdar, GB Mohanty, B Parida, A Saha, K Sudhakar, N Wickramage, S Banerjee, S Dugad, NK Mondal, H Arfaei, H Bakhshiansohi, SM Etesami, A Fahim, M Hashemi, H Hesari, A Jafari, M Khakzad, A Mohammadi, M Mohammadi Najafabadi, S Paktinat Mehdiabadi, B Safarzadeh, M Zeinali, M Abbrescia, L Barbone, C Calabria, SS Chhibra, A Colaleo, D Creanza, N De Filippis, M De Palma, L Fiore, G Iaselli, L Lusito, G Maggi, M Maggi, N Manna, B Marangelli, S My, S Nuzzo, N Pacifico, A Pompili, G Pugliese, F Romano, G Selvaggi, L Silvestris, G Singh, S Tupputi, G Zito, G Abbiendi, G Barozzi, 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, C Grandi, S Marcellini, G Masetti, 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, R Potenza, A Tricomi, C Tuve, G Barbagli, V Ciulli, C Civinini, R D'Alessandro, E Focardi, S Frosali, E Gallo, S Gonzi, 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, S Fiorendi, S Gennai, A Ghezzi, S Malvezzi, RA Manzoni, A Martelli, A Massironi, D Menasce, L Moroni, M Paganoni, D Pedrini, S Ragazzi, N Redaelli, S Sala, T Tabarelli de Fatis, S Buontempo, CA Carrillo Montoya, N Cavallo, A De Cosa, O Dogangun, F Fabozzi, AOM Iorio, L Lista, M Merola, P Paolucci, P Azzi, N Bacchetta, P Bellan, D Bisello, A Branca, R Carlin, P Checchia, T Dorigo, U Dosselli, F Fanzago, F Gasparini, U Gasparini, A Gozzelino, K Kanishchev, S Lacaprara, I Lazzizzera, M Loreti, M Margoni, M Mazzucato, AT Meneguzzo, M Nespolo, L Perrozzi, N Pozzobon, P Ronchese, F Simonetto, E Torassa, M Tosi, S Vanini, P Zotto, G Zumerle, U Berzano, M Gabusi, SP Ratti, C Riccardi, P Torre, P Vitulo, M Biasini, GM Bilei, B Caponeri, L Fanò, P Lariccia, A Lucaroni, G Mantovani, M Menichelli, A Nappi, F Romeo, A Santocchia, S Taroni, M Valdata, P Azzurri, G Bagliesi, T Boccali, G Broccolo, 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, A Rizzi, AT Serban, P Spagnolo, R Tenchini, G Tonelli, A Venturi, PG Verdini, L Barone, F Cavallari, D Del Re, M Diemoz, C Fanelli, M Grassi, E Longo, P Meridiani, F Micheli, S Nourbakhsh, G Organtini, F Pandolfi, R Paramatti, S Rahatlou, M Sigamani, L Soffi, N Amapane, R Arcidiacono, S Argiro, M Arneodo, C Biino, C Botta, N Cartiglia, R Castello, M Costa, N Demaria, A Graziano, C Mariotti, S Maselli, E Migliore, V Monaco, M Musich, MM Obertino, N Pastrone, M Pelliccioni, A Potenza, A Romero, M Ruspa, R Sacchi, V Sola, A Solano, A Staiano, A Vilela Pereira, S Belforte, F Cossutti, G Della Ricca, B Gobbo, M Marone, D Montanino, A Penzo, SG Heo, SK Nam, S Chang, J Chung, DH Kim, GN Kim, JE Kim, DJ Kong, H Park, SR Ro, DC Son, JY Kim, Zero J Kim, S Song, HY Jo, S Choi, D Gyun, B Hong, M Jo, H Kim, TJ Kim, KS Lee, DH Moon, SK Park, E Seo, KS Sim, M Choi, S Kang, H Kim, JH Kim, C Park, IC Park, S Park, G Ryu, Y Cho, Y Choi, YK Choi, J Goh, MS Kim, B Lee, J Lee, S Lee, H Seo, I Yu, MJ Bilinskas, I Grigelionis, M Janulis, H Castilla-Valdez, E De La Cruz-Burelo, I Heredia-de La Cruz, R Lopez-Fernandez, R Magaña Villalba, J Martínez-Ortega, A Sánchez-Hernández, LM Villasenor-Cendejas, S Carrillo Moreno, F Vazquez Valencia, HA Salazar Ibarguen, E Casimiro Linares, A Morelos Pineda, MA Reyes-Santos, D Krofcheck, AJ Bell, PH Butler, R Doesburg, S Reucroft, H Silverwood, M Ahmad, MI Asghar, HR Hoorani, S Khalid, WA Khan, T Khurshid, S Qazi, MA Shah, M Shoaib, G Brona, M Cwiok, W Dominik, K Doroba, A Kalinowski, M Konecki, J Krolikowski, H Bialkowska, B Boimska, T Frueboes, R Gokieli, M Górski, M Kazana, K Nawrocki, K Romanowska-Rybinska, M Szleper, G Wrochna, P Zalewski, N Almeida, P Bargassa, A David, P Faccioli, PG Ferreira Parracho, M Gallinaro, P Musella, A Nayak, J Pela, PQ Ribeiro, J Seixas, J Varela, P Vischia, I Belotelov, I Golutvin, N Gorbounov, I Gramenitski, A Kamenev, V Karjavin, V Konoplyanikov, V Korenkov, G Kozlov, A Lanev, P Moisenz, V Palichik, V Perelygin, M Savina, S Shmatov, S Vasil'ev, A Zarubin, S Evstyukhin, V Golovtsov, Y Ivanov, V Kim, P Levchenko, V Murzin, V Oreshkin, I Smirnov, V Sulimov, L Uvarov, S Vavilov, A Vorobyev, An Vorobyev, Yu Andreev, A Dermenev, S Gninenko, N Golubev, M Kirsanov, N Krasnikov, V Matveev, A Pashenkov, A Toropin, S Troitsky, V Epshteyn, M Erofeeva, V Gavrilov, M Kossov, A Krokhotin, N Lychkovskaya, V Popov, G Safronov, S Semenov, V Stolin, E Vlasov, A Zhokin, A Belyaev, E Boos, M Dubinin, L Dudko, A Ershov, A Gribushin, O Kodolova, I Lokhtin, A Markina, S Obraztsov, M Perfilov, S 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Abstract:

A search for a Higgs boson in the four-lepton decay channel H→ZZ, with each Z boson decaying to an electron or muon pair, is reported. The search covers Higgs boson mass hypotheses in the range of 110100 GeV (with 13 below 160 GeV), while 67.1±6.0 (9.5±1.3) events are expected from background. The four-lepton mass distribution is consistent with the expectation of standard model background production of ZZ pairs. Upper limits at 95% confidence level exclude the standard model Higgs boson in the ranges of 134-158 GeV, 180-305 GeV, and 340-465 GeV. Small excesses of events are observed around masses of 119, 126, and 320 GeV, making the observed limits weaker than expected in the absence of a signal.