Title: | Observation of Z decays to four leptons with the CMS detector at the LHC |
Authors: | Chatrchyan, S Khachatryan, V Sirunyan, AM Tumasyan, A Adam, W Aguilo, E Bergauer, T Dragicevic, M Ero, J Fabjan, C Friedl, M Pashenkov, A Cheung, HWK Kellogg, RG Paramatti, R Shi, X Kirn, M Kolberg, T Behrenhoff, W Lu, Y Marionneau, M Balazs, M Tlisov, D Tuominiemi, J Sperka, D Merola, M Codispoti, G Mignerey, AC Pedro, K Shiu, JG Bodek, A Palla, F Peterman, A Toropin, A Hrubec, J Sanchez, MCDLB Skuja, A Rahatlou, S Temple, J Sulak, L Wang, D Jo, M Tzeng, YM Tonjes, MB Puljak, I Tonwar, SC Twedt, E Tuovinen, E Apyan, A Behrens, U de Troconiz, JF Liang, D Bauer, G Chung, YS Alimena, J Haley, J Marlow, D Bendavid, J De Cosa, A Kroeger, R Ranjan, K Sigamani, M Busza, W Bergholz, M Butz, E Cali, IA Quertenmont, L Chan, M Zhang, L Meyer, A Miller, DH Spiegel, L Troshin, S Dutta, V Ceballos, GG Goncharov, M Sharma, V Delaere, C Schizzi, A Brun, H Covarelli, R Soffi, L Zang, J Auzinger, G Hahn, KA Kim, Y Klute, M Kalogeropoulos, A Flacher, H Krajczar, K Chlebana, F Li, W Gouzevitch, M Etesami, SM Luckey, PD Ungaro, D Wan, X Shivpuri, RK Ma, T Tcholakov, V Zhu, B Nahn, S Paus, C Hammad, GH Saha, A Morovic, S Nuttens, C Wendland, L D'Enterria, D Wang, M Caudron, J Ralph, D Elvira, VD Roland, C Barberis, E Banerjee, S Roland, G Rudolph, M Stephans, GSF Das, S Bhattacharya, S Klukas, J Speer, T Stoeckli, F Mundim, L Malik, S Sumorok, K Sung, K Pearson, T Zou, W de Barbaro, P Fisk, I Ozdemir, K Epshteyn, V Godinovic, N Velicanu, D Fernandez Menendez, J Giunta, M Cutts, D Bethani, A Demina, R Marco, J Eshaq, Y Garcia-Bellido, A Gasparini, U Boutle, S Banzuzi, K Goldenzweig, P Han, J Amapane, N Harel, A Evans, D Bhattacharya, S Freeman, J Janssen, X Erofeeva, M Vodopiyanov, I Miner, DC Karjalainen, A Vishnevskiy, D Zielinski, M Avila, C Attikis, A Bhatti, A Adiguzel, A Zhokin, A Delgado Peris, A Marco, R Ciesielski, R Borras, K Korpela, A Dutta, S Genchev, V Arcidiacono, R Gao, Y Demortier, L Goulianos, K Sellers, P Bakirci, MN Lungu, G Malik, S Mesropian, C Lincoln, D Dahmes, B Burgmeier, A Arora, S Barker, A Ferapontov, A Gavrilov, V Guida, R Chou, JP Cerci, S Galanti, M Green, D Hollar, J Argiro, S Fruhwirth, R Contreras-Campana, C Rodozov, M Kossov, M Contreras-Campana, E Duggan, D Ferencek, D Heintz, U Lannon, K Gershtein, Y Tuuva, T Chen, M De Benedetti, A Gray, R Lychkovskaya, N Halkiadakis, E Fernandez Bedoya, C Sharma, S Hidas, D Klein, B Lath, A Dugad, S Hauk, J Panwalkar, S Mendez, H Cavallari, F Pin, A Mavromanolakis, G Van Doninck, W Park, M Patel, R Cakir, A Rekovic, V Franzoni, G Slaunwhite, J Dozen, C Checchia, P Daskalakis, G Gutsche, O Robles, J Rose, K Jabeen, S Arneodo, M Salur, S Schnetzer, S Gomber, B Belforte, S Rohringer, H Gokbulut, G Calligaris, L Leonidov, A Seitz, C Somalwar, S Martinez Rivero, C Stone, R Mikulec, I Rizzi, A Kukartsev, G Mousa, J Foudas, C Besancon, M Gude, A Thomas, S Dumanoglu, I Campbell, A Biino, C Kim, H Cerizza, G Hollingsworth, M Spanier, S Popov, V Yang, ZC Ille, B Ozturk, S York, A Palinkas, J Eusebi, R Albrow, M Hanlon, J Villella, I Matorras, F Dietz-Laursonn, E Flanagan, W Gilmore, J Jain, S Choudhury, S Kao, SC Dogangun, O Cartiglia, N Kamon, T Guragain, S Laird, E Ekmedzic, M Nicolaou, C Castro, E Khotilovich, V Montalvo, R Perera, L Harris, RM Osipenkov, I Pakhotin, Y Martschei, D Jain, S Safronov, G Eskut, E Perloff, A Roe, J Landsberg, G Heo, SG Mucia, N Munoz Sanchez, FJ Safonov, A Costa, M Klapoetke, K Semenov, S Sakuma, T Sengupta, S Golf, F Neumeister, N Suarez, I Khurana, R Dejardin, M Ptochos, F Costanza, F Lynch, S Duarte Campderros, J Tatarinov, A Toback, D Akchurin, N Damgov, J Evangelou, I Dudero, PR Demaria, N Baillon, P Rodrigo, T Kubota, Y Stolin, V Hirschauer, J Dammann, D Sarkar, S Luk, M Jeong, C Kovitanggoon, K Medvedeva, T Lee, SW Denegri, D Libeiro, T Konoplyanikov, V Racz, A Roh, Y Razis, PA Volobouev, I Appelt, E Snow, GR Mariotti, C Florez, C Adair, A Girgis, S Gyun, D Gozzelino, A Sharan, M Liang, S Greene, S Mans, J Rodriguez-Marrero, AY Gurrola, A Johns, W Rutherford, B Johnston, C Kurt, P Reithler, H Fahim, A Gobbo, B Maguire, C Tyurin, N Melo, A Kubik, A Ruchti, R Hooberman, B Finger, M Sheldon, P Loveless, R Dabrowski, A Fabbro, B Snook, B Gurpinar, E Meng, X Gonzalez Sanchez, J Faure, JL Ferri, F Pelliccioni, M Ganjour, S Goy Lopez, S Givernaud, A Shukla, P Gras, P Schoefbeck, R Pardos, CD Garcia, JMV Chauhan, S Azarkin, M Zumerle, G Rahmat, R Vlasov, E de Monchenault, GH Jarry, P Lipton, R Ball, AH Locci, E Jindariani, S Malcles, J Potenza, A Gigi, D Hellwig, G Favart, D Dolen, J Aziz, T Chertok, M Millischer, L Nayak, A Rander, J Kodolova, O Rosowsky, A Shreyber, I Gonzalez Caballero, I Tao, J Lykken, J Titov, M Azzurri, P Jung, H Strauss, J Baffioni, S Conway, J Cox, B Ganguly, S Barney, D Geralis, T Moser, R Beaudette, F Benhabib, L Bianchini, L Polatoz, A Bluj, M Mueller, T Smith, J Francis, B Broutin, C Liu, H Spagnolo, P Busson, P Yilmaz, Y Sanders, DA Lee, KS Charlot, C Kokkas, P Daci, N Dahms, T Goodell, J Rodenburg, M Reece, W Romero, A Kasemann, M Taurok, A Boos, E Benitez, JF Dobrzynski, L Brigljevic, V Maeshima, K Chen, J de Cassagnac, RG Martins Junior, MC Nguyen, D Guchait, M Haguenauer, M Mine, P Mucibello, L Avdeeva, E Mironov, C Nguyen, M Fabozzi, F Sacchi, R Antunes, JR Sogut, K Finger, M Conway, R Ochando, C Paganini, P Marraffino, JM Harris, P Mccartin, J Sabes, D Salerno, R Rolandi, G Bernet, C Wagner, P Folgueras, S Cerci, DS Sirois, Y Veelken, C Anghel, IM Gomez Moreno, B Zabi, A Solano, A Singovsky, A Katsas, P Agram, JL Maity, M Hirosky, R Liao, J Oguri, V Andrea, J Bloch, D Bodin, D Brom, JM Lin, W Taroni, S Cardaci, M Bianchi, G Kleinwort, C Hos, I Chabert, EC Waltenberger, W Tali, B Bloom, K Majumder, G Frazier, R Staiano, A Maruyama, S Collard, C Conte, E Piperov, S Cheng, T Drouhin, F Kluge, H Ferro, C Chang, YH Rommerskirchen, T Topakli, H Fontaine, J-C Gele, D Goerlach, U Juillot, P Van Onsem, GP Spalding, WJ Bloch, P Le Bihan, AC Kadija, K Rovelli, C Cox, PT Meijers, F Rusakov, SV Pereira, AV Bose, S Van Hove, P Walzel, G Ledovskoy, A Fassi, F Mercier, D Adam, N Beauceron, S De Gruttola, M Beaupere, N Bondu, O Bhatnagar, V Moon, DH Garrido, RGR Boudoul, G Scodellaro, L Mason, D Weber, H Rovere, M Chasserat, J Marinov, A Schul, N Butt, J Chierici, R Contardo, D Olschewski, M Mazumdar, K Knutsson, A Lin, C Wickramage, N Depasse, P Erbacher, R Godshalk, A Asawatangtrakuldee, C Kraemer, M Krucker, D De Roeck, A Kuznetsova, E Olsen, J Lange, W Skhirtladze, N Johnson, M Kim, TY Lohmann, W Lutz, B Mohanty, GB Hashemi, M Tan, P Kyberd, P Volkov, A Ochesanu, S Kanishchev, K Vergili, LN Neu, C Mankel, R Marfin, I Iashvili, I Marienfeld, M Melzer-Pellmann, I-A Claes, DR Meyer, AB Di Guida, S Long, OR Lista, L Hesari, H Meschi, E Vergili, M Vidal, R Nam, SK Taylor, L Mnich, J Mussgiller, A Naumann-Emme, S Mohapatra, A Bocci, A Olzem, J Perrey, H Segala, M Roland, B Nash, D Jain, S Petrukhin, A Fouz, MC Jafari, A Kim, ZJ Pitzl, D Raspereza, A Tkaczyk, S Lethuillier, M Wood, J Chang, S Cipriano, PMR Gabusi, M Dobson, M Riedl, C Sakulin, H Ron, E Rosin, M Squires, M Salfeld-Nebgen, J Meola, S Nogima, H Dobur, D Mirabito, L Schmidt, R Diamond, B Goldstein, J Piedra Gomez, J Schoerner-Sadenius, T Kiesenhofer, W Rougny, R Mulders, M Sen, N Yohay, R Bagliesi, G Spiridonov, A Stein, M Santanastasio, F Perries, S Martins, CDO Akin, IV Dupont-Sagorin, N Khakzad, M Walsh, R Wissing, C Gollapinni, S Autermann, C Blobel, V Kozlov, G Schaefer, C Wang, J Kharchilava, A Zatserklyaniy, A Draeger, J Aliev, T Mishra, K Kim, DH Enderle, H Eckerlin, G Erfle, J Markina, A Najafabadi, MM Selvaggi, M Gebbert, U Goerner, M Dudko, L Elliott-Peisert, A Bilin, B Tripathi, M Sordini, V Harr, R Schwick, C Tran, NV Hermanns, T Hoeing, RS Kumar, A Kim, GN Hartl, C Kaschube, K Kaussen, G Bilmis, S Kirschenmann, H Segoni, I Choudhury, RK Klanner, R Wulz, C-E Sierra, RV Lange, J Mura, B Svyatkovskiy, A Staykova, Z Nowak, F Frisch, B Duchardt, D Bansal, S Karchin, PE Mehdiabadi, SP Peiffer, T Kong, DJ Tosi, S Shipkowski, SP Andreev, V Pietsch, N Rathjens, D Ghete, VM Sander, C Schettler, H Rusack, R Teodorescu, L Flix, J Schleper, P Schlieckau, E Safarzadeh, B Gardner, M Schmidt, A Velde, CV Schroeder, M Cline, D Van Haevermaet, H Don, CKK Park, H Kelley, R Funk, W Smith, K Schum, T Seidel, M Damiao, DD Uplegger, L Valls, N Sola, V Zeinali, M Assran, Y Stadie, H Leggat, D Deniz, M Cousins, R Steinbrueck, G Sekmen, S Thomsen, J Vanelderen, L Barth, C Ro, SR Odell, N Joshi, U Berger, J Boeser, C Sanabria, JC Gamsizkan, H Luthra, A Vaandering, EW Cabrillo, IJ Duris, J Georgiou, G Van Mechelen, P Chwalek, T Adler, V De Boer, W Tschudi, Y Descroix, A Lanev, A Grimes, M Dierlamm, A Prado Da Silva, WL Feindt, M Wolf, M Guthoff, M Hackstein, C Diemoz, M Iaydjiev, P Nesvold, E Tenchini, R Snowball, M Hartmann, F Verdier, P Alverson, G Gouskos, L Guler, AM Hauth, T Giffels, M Heinrich, M Lamichhane, P Van Remortel, N 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M Braibant-Giacomelli, S Brigliadori, L Field, RD Capiluppi, P Klyukhin, V Houtz, R Bachtis, M Durkin, LS Oehler, A Castro, A Sphicas, P Alagoz, E Lebourgeois, M Gay, APR Cavallo, FR Stoynev, S Cuffiani, M Innocente, V Kangal, EE Dallavalle, GM Beranek, S Torre, P Garcia-Abia, P Fabbri, F Fanfani, A Ozpineci, A Ott, J Leslie, D Farrell, C Fasanella, D Belknap, D Park, C Obraztsov, S Giacomelli, P Grandi, C Edelhoff, M Guiducci, L Marcellini, S Chen, KH Serin, M Velasco, M Hreus, T Borrello, L Nguyen, H Wang, Z Masetti, G Hauser, J Baumgartel, D Janot, P Meneghelli, M Parida, B Montanari, A Sever, R Park, IC Spiga, D Szillasi, Z Navarria, FL Odorici, F Perrotta, A Primavera, F Rossi, AM Ignatenko, M Fisher, M Quast, G Feld, L Tsirou, A Surat, UE Gomez, JP Won, S Rovelli, T Siroli, GP Leonard, A Kaadze, K Park, S Travaglini, R Albergo, S Kyriakis, A Jarvis, C Cappello, G Ofierzynski, RA Yalvac, M Candelise, V Chiorboli, M Rabbertz, K Fu, Y Costa, S Potenza, R Ojalvo, I Lelas, D Tricomi, A Tuve, C Kilminster, B Barbagli, G Manthos, N Raics, P Heracleous, N Ryu, G Ciulli, V Xu, M Karavakis, E Ratnikov, F Marage, PE Furic, IK Carlsmith, D Civinini, C D'Alessandro, R Yildirim, E Focardi, E Frosali, S Malakhov, A Veres, GI Mossolov, V Bauerdick, LAT Antonelli, L Gallo, E Gonzi, S Cepeda, M Cho, Y Wu, W Meschini, M Dubinin, M Fischer, R Paoletti, S Gartner, J Sguazzoni, G Hindrichs, O Kousouris, K Bai, Y Dasu, S Tropiano, A Mohammadi, A Benussi, L Vlimant, JR Bianco, S Zeyrek, M Berry, D Beliy, N Colafranceschi, S Choi, Y Jussen, R Mazza, G Fabbri, F Wittich, P Lazzizzera, I Plager, C Hugon, J Piccolo, D Gulmez, E Fabbricatore, P Musenich, R Benaglia, A Lecoq, P Karaman, T Rios, AAO Suarez, RG Eads, M De Guio, F Di Matteo, L Reis, T Rakness, G Haas, J Brinkerhoff, A Strobbe, N Kim, B Hansen, M Elmer, P Fiorendi, S Gennai, S Ghezzi, A Uzunian, A Malvezzi, S Ratnikova, N Manzoni, RA Kuo, CM Letts, J Martelli, A Martins, T Friis, E Schlein, P Massironi, A Daubie, E Menasce, D 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Cerminara, G Tytgat, M Villasenor-Cendejas, LM Carrillo Moreno, S Perieanu, A Serban, AT Vazquez Valencia, F Deiters, K Trocsanyi, ZL Azzi, P Salazar Ibarguen, HA Casimiro Linares, E Chasco, M Papadopoulos, I Morelos Pineda, A Gonzalez Lopez, O Reyes-Santos, MA Holzner, A Heath, GP Krofcheck, D Cossutti, F Pagano, D Perez, E Djordjevic, M Bell, AJ Butler, PH Kaya, O Verwilligen, P Bacchetta, N Verdini, PG Hall-Wilton, R Simonis, HJ Doesburg, R Reucroft, S Raupach, F Kypreos, T Silverwood, H Ahmad, M Weber, M Rodriguez, JL Perfilov, M Ozkorucuklu, S Sasseville, M Asghar, MI Hoorani, HR Hughes, R Khalid, S Lokhtin, I Yang, F Sammet, J Alves, GA Erdmann, W Bellato, M Khan, WA Herndon, M Sonmez, N Xiao, H Bazterra, VE Khurshid, T Qazi, S Walsh, S Shah, MA Li, SW Pierro, GA Shoaib, M Ko, W Bialkowska, H Mueller, S Stober, FM Milosevic, J Hughes, R Boimska, B Frueboes, T Babb, J Gabathuler, K Bisello, D Winn, D Low, JF Gokieli, R Kim, TJ Schael, S Perrozzi, L Cankocak, K Gorski, M Kazana, M 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Keywords: | Hadron-Hadron Scattering |
Issue Date: | 2012 |
Publisher: | Springer-Verlag |
Citation: | Journal of High Energy Physics 2012: 034, Dec 2012 |
Abstract: | The first observation of the Z boson decaying to four leptons in proton-proton collisions is presented. The analyzed data set corresponds to an integrated luminosity of 5.02 inverse femtobarns at sqrt(s) = 7 TeV collected by the CMS detector at the Large Hadron Collider. A pronounced resonance peak, with a statistical significance of 9.7 sigma, is observed in the distribution of the invariant mass of four leptons (electrons and/or muons) with mass and width consistent with expectations for Z boson decays. The branching fraction and cross section reported here are defined by phase space restrictions on the leptons, namely, 80 < m[4l] < 100 GeV, where m[4l] is the invariant mass of the four leptons, and m[ll] > 4 GeV for all pairs of leptons, where m[ll] is the two-lepton invariant mass. The measured branching fraction is B(Z to 4l) = (4.2 /+0.9/-0.8 (stat.) +/- 0.2 (syst.)) 10E-6 and agrees with the standard model prediction of 4.45 10E-6. The measured cross section times branching fraction is sigma(pp to Z) B(Z to 4 l) = 112 +23/-20 (stat.) +7/-5 (syst.) +3/-2 (lumi.) fb, also consistent with the standard model prediction of 120 fb. The four-lepton mass peak arising from Z to 4 l decays provides a calibration channel for the Higgs boson search in the H to ZZ to 4 l decay mode. |
Description: | This is the pre-print version of the Article. The official published version can be accessed from the links below - Copyright @ 2012 Springer-Verlag |
URI: | http://link.springer.com/article/10.1007%2FJHEP12%282012%29034 http://bura.brunel.ac.uk/handle/2438/7341 |
DOI: | http://dx.doi.org/10.1007/JHEP12(2012)034 |
ISSN: | 1126-6708 |
Appears in Collections: | Electronic and Electrical Engineering Dept of Electronic and Electrical Engineering Research Papers
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