The progenitor mass of the Type IIP supernova SN 2004et from late-time spectral modeling⋆

Astronomy & Astrophysics EDP Sciences 546 (2012) a28

Authors:

A Jerkstrand, C Fransson, K Maguire, S Smartt, M Ergon, J Spyromilio

Search for pair production of first- and second-generation scalar leptoquarks in pp collisions at √s=7TeV

Physical Review D - Particles, Fields, Gravitation and Cosmology 86:5 (2012)

Authors:

S Chatrchyan, V Khachatryan, AM Sirunyan, A Tumasyan, W Adam, E Aguilo, T Bergauer, M Dragicevic, J Erö, C Fabjan, M Friedl, R Frühwirth, VM Ghete, J Hammer, N Hörmann, J Hrubec, M Jeitler, W Kiesenhofer, V Knünz, M Krammer, I Krätschmer, D Liko, I Mikulec, M Pernicka, B Rahbaran, C Rohringer, H Rohringer, R Schöfbeck, J Strauss, A Taurok, W Waltenberger, G Walzel, E Widl, CE Wulz, V Mossolov, N Shumeiko, J Suarez Gonzalez, M Bansal, S Bansal, T Cornelis, EA De Wolf, X Janssen, S Luyckx, L Mucibello, S Ochesanu, B Roland, R Rougny, M Selvaggi, Z Staykova, 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, B Clerbaux, G De Lentdecker, V Dero, APR Gay, T Hreus, A Léonard, PE Marage, T Reis, L Thomas, G Vander Marcken, C Vander Velde, P Vanlaer, J Wang, 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, P Verwilligen, S Walsh, E Yazgan, N Zaganidis, S Basegmez, G Bruno, R Castello, L Ceard

Abstract:

Results are presented from a search for the pair production of first- and second-generation scalar leptoquarks in proton-proton collisions at √s=7TeV. The data sample corresponds to an integrated luminosity of 5.0fb-1, collected by the CMS detector at the LHC. The search signatures involve either two charged leptons of the same flavor (electrons or muons) and at least two jets or a single charged lepton (electron or muon), missing transverse energy, and at least two jets. If the branching fraction of the leptoquark decay into a charged lepton and a quark is assumed to be β=1, leptoquark pair production is excluded at the 95% confidence level for masses below 830 GeV and 840 GeV for the first and second generations, respectively. For β=0.5, masses below 640 GeV and 650 GeV are excluded. These limits are the most stringent to date. © 2012 CERN.

Transverse momentum cross section of e +e - pairs in the Z-boson region from pp̄ collisions at √s=1.96TeV

Physical Review D - Particles, Fields, Gravitation and Cosmology 86:5 (2012)

Authors:

T Aaltonen, B Alvarez González, S Amerio, D Amidei, A Anastassov, A Annovi, J Antos, G Apollinari, JA Appel, T Arisawa, A Artikov, J Asaadi, W Ashmanskas, B Auerbach, A Aurisano, F Azfar, W Badgett, T Bae, A Barbaro-Galtieri, VE Barnes, BA Barnett, P Barria, P Bartos, M Bauce, F Bedeschi, S Behari, G Bellettini, J Bellinger, D Benjamin, A Beretvas, A Bhatti, D Bisello, I Bizjak, KR Bland, B Blumenfeld, A Bocci, A Bodek, D Bortoletto, J Boudreau, A Boveia, L Brigliadori, C Bromberg, E Brucken, J Budagov, HS Budd, K Burkett, G Busetto, P Bussey, A Buzatu, A Calamba, C Calancha, S Camarda, M Campanelli, M Campbell, F Canelli, B Carls, D Carlsmith, R Carosi, S Carrillo, S Carron, B Casal, M Casarsa, A Castro, P Catastini, D Cauz, V Cavaliere, M Cavalli-Sforza, A Cerri, L Cerrito, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, K Cho, D Chokheli, WH Chung, YS Chung, MA Ciocci, A Clark, C Clarke, G Compostella, ME Convery, J Conway, M Corbo, M Cordelli, CA Cox, DJ Cox, F Crescioli, J Cuevas, R Culbertson, D Dagenhart, N D'ascenzo, M Datta, P De Barbaro, M Dell'orso, L Demortier, M Deninno, F Devoto, M D'errico

Abstract:

The transverse momentum cross section of e +e - pairs in the Z-boson mass region of 66-116GeV/c2 is precisely measured using Run II data corresponding to 2.1fb -1 of integrated luminosity recorded by the Collider Detector at Fermilab. The cross section is compared with two quantum chromodynamic calculations. One is a fixed-order perturbative calculation at O(αs2), and the other combines perturbative predictions at high transverse momentum with the gluon resummation formalism at low transverse momentum. Comparisons of the measurement with calculations show reasonable agreement. The measurement is of sufficient precision to allow refinements in the understanding of the transverse momentum distribution. © 2012 American Physical Society.

Search for a light pseudoscalar Higgs boson in the dimuon decay channel in pp collisions at √s = 7 TeV.

Phys Rev Lett 109:12 (2012) 121801

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, N Hörmann, J Hrubec, M Jeitler, W Kiesenhofer, V Knünz, M Krammer, D Liko, I Mikulec, M Pernicka, B Rahbaran, C Rohringer, H Rohringer, R Schöfbeck, J Strauss, A Taurok, P Wagner, W Waltenberger, G Walzel, E Widl, C-E Wulz, V Mossolov, N Shumeiko, J Suarez Gonzalez, S Bansal, T Cornelis, EA De Wolf, X Janssen, S Luyckx, T Maes, L Mucibello, S Ochesanu, B Roland, R Rougny, M Selvaggi, Z Staykova, 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, B Clerbaux, G De Lentdecker, V Dero, APR Gay, T Hreus, A Léonard, PE Marage, T Reis, L Thomas, C Van der Velde, P Vanlaer, J Wang, 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, R Castello, A Caudron, L Ceard, C Delaere, T du Pree, D Favart, L Forthomme, A Giammanco, J Hollar, V Lemaitre, J Liao, O Militaru, C Nuttens, D Pagano, L Perrini, A Pin, K Piotrzkowski, N Schul, JM Vizan Garcia, N Beliy, T Caebergs, E Daubie, GH Hammad, 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, L Soares Jorge, A Sznajder, 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, 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, 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, C Avila, JP Gomez, B Gomez Moreno, AF Osorio Oliveros, JC Sanabria, N Godinovic, D Lelas, R Plestina, D Polic, I Puljak, Z Antunovic, M Kovac, V Brigljevic, S Duric, K Kadija, J Luetic, S Morovic, A Attikis, M Galanti, G Mavromanolakis, J Mousa, C Nicolaou, F Ptochos, PA Razis, M Finger, M Finger, Y Assran, S Elgammal, A Ellithi Kamel, S Khalil, MA Mahmoud, A Radi, M Kadastik, M Müntel, M Raidal, L Rebane, A Tiko, V Azzolini, P Eerola, G Fedi, M Voutilainen, 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 Karjalainen, A Korpela, T Tuuva, 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, A Nayak, 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, R Granier de Cassagnac, M Haguenauer, P Miné, C Mironov, M Nguyen, C Ochando, P Paganini, D Sabes, R Salerno, Y Sirois, 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, A-C Le Bihan, P Van Hove, F Fassi, D Mercier, S Beauceron, N Beaupere, O Bondu, G Boudoul, J Chasserat, R Chierici, D Contardo, P Depasse, H El Mamouni, J Fay, S Gascon, M Gouzevitch, B Ille, T Kurca, M Lethuillier, L Mirabito, S Perries, V Sordini, S Tosi, Y Tschudi, P Verdier, S Viret, Z Tsamalaidze, 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, D Duchardt, M Erdmann, R Fischer, A Güth, T Hebbeker, C Heidemann, K Hoepfner, D Klingebiel, P Kreuzer, 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, G Flügge, H Geenen, M Geisler, W Haj Ahmad, F Hoehle, B Kargoll, T Kress, Y Kuessel, A Nowack, L Perchalla, O Pooth, J Rennefeld, P Sauerland, A Stahl, M Aldaya Martin, J Behr, W Behrenhoff, U Behrens, M Bergholz, A Bethani, K Borras, A Burgmeier, A Cakir, L Calligaris, A Campbell, E Castro, F Costanza, D Dammann, C Diez Pardos, G Eckerlin, D Eckstein, G Flucke, A Geiser, I Glushkov, P Gunnellini, S Habib, J Hauk, G Hellwig, 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, H Perrey, A Petrukhin, D Pitzl, A Raspereza, PM Ribeiro Cipriano, C Riedl, E Ron, M Rosin, J Salfeld-Nebgen, R Schmidt, T Schoerner-Sadenius, N Sen, A Spiridonov, M Stein, 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, T Peiffer, N Pietsch, D Rathjens, C Sander, H Schettler, P Schleper, E Schlieckau, A Schmidt, M Schröder, T Schum, M Seidel, H Stadie, G Steinbrück, J Thomsen, C Barth, J Berger, C Böser, T Chwalek, W De Boer, A Descroix, A Dierlamm, M Feindt, M Guthoff, C Hackstein, F Hartmann, T Hauth, M Heinrich, H Held, KH Hoffmann, S Honc, I Katkov, JR Komaragiri, D Martschei, S Mueller, Th Müller, M Niegel, A Nürnberg, O Oberst, A Oehler, J Ott, G Quast, K Rabbertz, F Ratnikov, N Ratnikova, S Röcker, A Scheurer, F-P Schilling, G Schott, HJ Simonis, FM Stober, D Troendle, R Ulrich, J Wagner-Kuhr, S Wayand, T Weiler, M Zeise, 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, I Evangelou, C Foudas, P Kokkas, N Manthos, I Papadopoulos, V Patras, G Bencze, C Hajdu, P Hidas, D Horvath, F Sikler, V Veszpremi, G Vesztergombi, N Beni, S Czellar, 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, MZ Mehta, N Nishu, LK Saini, A Sharma, J Singh, Ashok Kumar, Arun Kumar, S Ahuja, A Bhardwaj, BC Choudhary, S Malhotra, M Naimuddin, K Ranjan, V Sharma, RK Shivpuri, S Banerjee, S Bhattacharya, S Dutta, B Gomber, Sa Jain, Sh Jain, R Khurana, S Sarkar, M Sharan, A Abdulsalam, RK Choudhury, D Dutta, S Kailas, V Kumar, P Mehta, AK Mohanty, LM Pant, P Shukla, T Aziz, S Ganguly, M Guchait, M Maity, G Majumder, K Mazumdar, GB Mohanty, B Parida, K Sudhakar, N Wickramage, S Banerjee, S Dugad, 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, SS Chhibra, A Colaleo, D Creanza, N De Filippis, M De Palma, L Fiore, G Iaselli, L Lusito, G Maggi, M Maggi, B Marangelli, S My, S Nuzzo, N Pacifico, A Pompili, G Pugliese, G Selvaggi, L Silvestris, G Singh, R Venditti, 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, C Grandi, L Guiducci, 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, S Meola, M Merola, P Paolucci, P Azzi, N Bacchetta, D Bisello, A Branca, R Carlin, P Checchia, T Dorigo, F Gasparini, U Gasparini, A Gozzelino, K Kanishchev, S Lacaprara, I Lazzizzera, M Margoni, AT Meneguzzo, J Pazzini, N Pozzobon, P Ronchese, E Torassa, M Tosi, S Vanini, P Zotto, A Zucchetta, G Zumerle, M Gabusi, SP Ratti, C Riccardi, P Torre, P Vitulo, M Biasini, GM Bilei, L Fanò, P Lariccia, A Lucaroni, G Mantovani, M Menichelli, A Nappi, F Romeo, A Saha, A Santocchia, S Taroni, 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, A Rizzi, AT Serban, P Spagnolo, P Squillacioti, R Tenchini, G Tonelli, A Venturi, PG Verdini, L Barone, F Cavallari, D Del Re, M Diemoz, M Grassi, E Longo, P Meridiani, F Micheli, S Nourbakhsh, G Organtini, R Paramatti, S Rahatlou, M Sigamani, L Soffi, N Amapane, R Arcidiacono, S Argiro, M Arneodo, C Biino, N Cartiglia, 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, V Candelise, F Cossutti, G Della Ricca, B Gobbo, M Marone, D Montanino, A Penzo, A Schizzi, SG Heo, TY Kim, SK Nam, S Chang, J Chung, DH Kim, GN Kim, DJ Kong, H Park, SR Ro, DC Son, T Son, JY Kim, Zero J Kim, S Song, S Choi, D Gyun, B Hong, M Jo, H Kim, TJ Kim, KS Lee, DH Moon, SK Park, M Choi, S Kang, JH Kim, C Park, IC Park, S Park, G Ryu, Y Cho, Y Choi, YK Choi, J Goh, MS Kim, E Kwon, B Lee, J Lee, S Lee, H Seo, I Yu, MJ Bilinskas, I Grigelionis, M Janulis, A Juodagalvis, 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, K Bunkowski, 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, M Fernandes, PG Ferreira Parracho, M Gallinaro, J Seixas, J Varela, P Vischia, I Belotelov, P Bunin, M Gavrilenko, I Golutvin, I Gorbunov, A Kamenev, V Karjavin, G Kozlov, A Lanev, A Malakhov, P Moisenz, V Palichik, V Perelygin, S Shmatov, V Smirnov, A Volodko, 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, D Tlisov, A Toropin, V Epshteyn, M Erofeeva, V Gavrilov, M Kossov, N Lychkovskaya, V Popov, G Safronov, S Semenov, V Stolin, E Vlasov, A Zhokin, A Belyaev, E Boos, V Bunichev, M Dubinin, L Dudko, A Ershov, V Klyukhin, O Kodolova, I Lokhtin, A Markina, S Obraztsov, M Perfilov, S Petrushanko, A Popov, L Sarycheva, V Savrin, A Snigirev, V Andreev, M Azarkin, I Dremin, M Kirakosyan, A Leonidov, G Mesyats, SV Rusakov, A Vinogradov, I Azhgirey, I Bayshev, S Bitioukov, V Grishin, V Kachanov, D Konstantinov, A Korablev, V Krychkine, V Petrov, R Ryutin, A Sobol, L Tourtchanovitch, S Troshin, N Tyurin, A Uzunian, A Volkov, P Adzic, M Djordjevic, M Ekmedzic, D Krpic, J Milosevic, M Aguilar-Benitez, J Alcaraz Maestre, P Arce, C Battilana, E Calvo, M Cerrada, M Chamizo Llatas, N Colino, B De La Cruz, A Delgado Peris, D Domínguez Vázquez, C Fernandez Bedoya, JP Fernández Ramos, A Ferrando, J Flix, MC Fouz, P Garcia-Abia, O Gonzalez Lopez, S Goy Lopez, JM Hernandez, MI Josa, G Merino, J Puerta Pelayo, A Quintario Olmeda, I Redondo, L Romero, J Santaolalla, MS Soares, C Willmott, C Albajar, G Codispoti, JF de Trocóniz, H Brun, J Cuevas, J Fernandez Menendez, S Folgueras, I Gonzalez Caballero, L Lloret Iglesias, J Piedra Gomez, JA Brochero Cifuentes, IJ Cabrillo, A Calderon, SH Chuang, J Duarte Campderros, M Felcini, M Fernandez, G Gomez, J Gonzalez Sanchez, C Jorda, P Lobelle Pardo, A Lopez Virto, J Marco, R Marco, C Martinez Rivero, F Matorras, FJ Munoz Sanchez, T Rodrigo, AY Rodríguez-Marrero, A Ruiz-Jimeno, L Scodellaro, M Sobron Sanudo, I Vila, R Vilar Cortabitarte, D Abbaneo, E Auffray, G 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A Sharma, P Siegrist, P Silva, M Simon, P Sphicas, D Spiga, M Spiropulu, M Stoye, A Tsirou, GI Veres, JR Vlimant, HK Wöhri, SD Worm, WD Zeuner, W Bertl, K Deiters, W Erdmann, K Gabathuler, R Horisberger, Q Ingram, HC Kaestli, S König, D Kotlinski, U Langenegger, F Meier, D Renker, T Rohe, J Sibille, L Bäni, P Bortignon, MA Buchmann, B Casal, N Chanon, A Deisher, G Dissertori, M Dittmar, M Dünser, J Eugster, K Freudenreich, C Grab, D Hits, P Lecomte, W Lustermann, AC Marini, P Martinez Ruiz Del Arbol, N Mohr, F Moortgat, C Nägeli, P Nef, F Nessi-Tedaldi, F Pandolfi, L Pape, F Pauss, M Peruzzi, FJ Ronga, M Rossini, L Sala, AK Sanchez, A Starodumov, B Stieger, M Takahashi, L Tauscher, A Thea, K Theofilatos, D Treille, C Urscheler, R Wallny, HA Weber, L Wehrli, E Aguilo, C Amsler, V Chiochia, S De Visscher, C Favaro, M Ivova Rikova, B Millan Mejias, P Otiougova, P Robmann, H Snoek, S Tupputi, M Verzetti, YH Chang, KH Chen, CM Kuo, SW Li, W Lin, ZK Liu, YJ Lu, D Mekterovic, AP Singh, R 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Z Hu, M Jones, O Koybasi, M Kress, AT Laasanen, N Leonardo, V Maroussov, P Merkel, DH Miller, N Neumeister, I Shipsey, D Silvers, A Svyatkovskiy, M Vidal Marono, HD Yoo, J Zablocki, Y Zheng, S Guragain, N Parashar, A Adair, C Boulahouache, KM Ecklund, FJM Geurts, BP Padley, R Redjimi, J Roberts, J Zabel, B Betchart, A Bodek, YS Chung, R Covarelli, P de Barbaro, R Demina, Y Eshaq, A Garcia-Bellido, P Goldenzweig, J Han, A Harel, DC Miner, D Vishnevskiy, M Zielinski, A Bhatti, R Ciesielski, L Demortier, K Goulianos, G Lungu, S Malik, C Mesropian, S Arora, A Barker, JP Chou, C Contreras-Campana, E Contreras-Campana, D Duggan, D Ferencek, Y Gershtein, R Gray, E Halkiadakis, D Hidas, A Lath, S Panwalkar, M Park, R Patel, V Rekovic, J Robles, K Rose, S Salur, S Schnetzer, C Seitz, S Somalwar, R Stone, S Thomas, G Cerizza, M Hollingsworth, S Spanier, ZC Yang, A York, R Eusebi, W Flanagan, J Gilmore, T Kamon, V Khotilovich, R Montalvo, I Osipenkov, Y Pakhotin, A Perloff, J Roe, A Safonov, T Sakuma, S Sengupta, I Suarez, A Tatarinov, D Toback, N Akchurin, J Damgov, PR Dudero, C Jeong, K Kovitanggoon, SW Lee, T Libeiro, Y Roh, I Volobouev, E Appelt, C Florez, S Greene, A Gurrola, W Johns, C Johnston, P Kurt, C Maguire, A Melo, P Sheldon, B Snook, S Tuo, J Velkovska, MW Arenton, M Balazs, S Boutle, B Cox, B Francis, J Goodell, R Hirosky, A Ledovskoy, C Lin, C Neu, J Wood, R Yohay, S Gollapinni, R Harr, PE Karchin, C Kottachchi Kankanamge Don, P Lamichhane, A Sakharov, M Anderson, M Bachtis, D Belknap, L Borrello, D Carlsmith, M Cepeda, S Dasu, L Gray, KS Grogg, M Grothe, R Hall-Wilton, M Herndon, A Hervé, P Klabbers, J Klukas, A Lanaro, C Lazaridis, J Leonard, R Loveless, A Mohapatra, I Ojalvo, F Palmonari, GA Pierro, I Ross, A Savin, WH Smith, J Swanson, CMS Collaboration

Abstract:

The dimuon invariant mass spectrum is searched in the range between 5.5 and 14 GeV for a light pseudoscalar Higgs boson a, predicted in a number of new physics models, including the next-to-minimal supersymmetric standard model. The data sample used in the search corresponds to an integrated luminosity of 1.3 fb(-1) collected in pp collisions at √s = 7 TeV with the CMS detector at the LHC. No excess is observed above the background predictions and upper limits are set on the cross section times branching fraction σ × B(pp→a→μ(+)μ(-)) in the range of 1.5-7.5 pb. These results improve on existing bounds on the abb coupling for m(a) < m(Υ(1S)) and are the first significant limits for m(a) > m(Υ(3S)). Constraints on the supersymmetric parameter space are presented in the context of the next-to-minimal model.

Search for physics beyond the standard model in events with a Z boson, jets, and missing transverse energy in pp collisions at √s=7 TeV

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 716:2 (2012) 260-284

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, 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, CE Wulz, V Mossolov, N Shumeiko, J SuarezGonzalez, S Bansal, K Cerny, T Cornelis, EA DeWolf, X Janssen, S Luyckx, T Maes, L Mucibello, S Ochesanu, B Roland, R Rougny, M Selvaggi, H VanHaevermaet, P VanMechelen, N VanRemortel, A VanSpilbeeck, F Blekman, S Blyweert, J D'Hondt, R GonzalezSuarez, A Kalogeropoulos, M Maes, A Olbrechts, W VanDoninck, P VanMulders, GP VanOnsem, I Villella, O Charaf, B Clerbaux, G DeLentdecker, V Dero, APR Gay, T Hreus, A Léonard, PE Marage, L Thomas, C VanderVelde, P Vanlaer, V Adler, K Beernaert, A Cimmino, S Costantini, G Garcia, M Grunewald, B Klein, J Lellouch, A Marinov, J Mccartin, AA OcampoRios, D Ryckbosch, N Strobbe, F Thyssen, M Tytgat, L Vanelderen, P Verwilligen, S Walsh, E Yazgan, N Zaganidis, S Basegmez, G Bruno, L Ceard, C Delaere, T duPree, D Favart

Abstract:

A search is presented for physics beyond the standard model (BSM) in events with a Z boson, jets, and missing transverse energy (ETmiss). This signature is motivated by BSM physics scenarios, including supersymmetry. The study is performed using a sample of proton-proton collision data collected at √s=7 TeV with the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.98 fb -1. The contributions from the dominant standard model backgrounds are estimated from data using two complementary strategies, the jet-Z balance technique and a method based on modeling ETmiss with data control samples. In the absence of evidence for BSM physics, we set limits on the non-standard-model contributions to event yields in the signal regions and interpret the results in the context of simplified model spectra. Additional information is provided to facilitate tests of other BSM physics models. © 2012 CERN.