The UV-bright, Slowly Declining Transient PS1-11af as a Partial Tidal Disruption Event

(2013)

Authors:

R Chornock, E Berger, S Gezari, BA Zauderer, A Rest, L Chomiuk, A Kamble, AM Soderberg, I Czekala, J Dittmann, M Drout, RJ Foley, W Fong, ME Huber, RP Kirshner, A Lawrence, R Lunnan, GH Marion, G Narayan, AG Riess, KC Roth, NE Sanders, D Scolnic, SJ Smartt, K Smith, CW Stubbs, JL Tonry, WS Burgett, KC Chambers, H Flewelling, KW Hodapp, N Kaiser, EA Magnier, DC Martin, JD Neill, PA Price, R Wainscoat

Measurement of theBs0μ+μBranching Fraction and Search forB0μ+μwith the CMS Experiment

Physical Review Letters American Physical Society (APS) 111:10 (2013) 101804

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, N Hörmann, J Hrubec, M Jeitler, W Kiesenhofer, V Knünz, M Krammer, I Krätschmer, D Liko, I Mikulec, D Rabady, B Rahbaran, C Rohringer, H Rohringer, R Schöfbeck, J Strauss, A Taurok, W Treberer-Treberspurg, W Waltenberger, C-E Wulz, V Mossolov, N Shumeiko, J Suarez Gonzalez, S Alderweireldt, M Bansal, S Bansal, T Cornelis, EA De Wolf, X Janssen, A Knutsson, S Luyckx, L Mucibello, S Ochesanu, B Roland, R Rougny, Z Staykova, H Van Haevermaet, P Van Mechelen, N Van Remortel, A Van Spilbeeck, F Blekman, S Blyweert, J D’Hondt, A Kalogeropoulos, J Keaveney, S Lowette, M Maes, A Olbrechts, S Tavernier, W Van Doninck, P Van Mulders, GP Van Onsem, I Villella, C Caillol, B Clerbaux, G De Lentdecker, L Favart, APR Gay, T Hreus, A Léonard, PE Marage, A Mohammadi, L Perniè, T Reis, T Seva, L Thomas, C Vander Velde, P Vanlaer, J Wang, V Adler, K Beernaert, L Benucci, A Cimmino, S Costantini, S Dildick, G Garcia, B Klein, J Lellouch, A Marinov, J Mccartin, AA Ocampo Rios, D Ryckbosch, M Sigamani, N Strobbe, F Thyssen, M Tytgat, S Walsh, E Yazgan, N Zaganidis, S Basegmez, C Beluffi, G Bruno, R Castello, A Caudron, L Ceard, GG Da Silveira, C Delaere, T du Pree, D Favart, L Forthomme, A Giammanco, J Hollar, P Jez, V Lemaitre, J Liao, O Militaru, C Nuttens, D Pagano, A Pin, K Piotrzkowski, A Popov, M Selvaggi, M Vidal Marono, JM Vizan Garcia, N Beliy, T Caebergs, E Daubie, GH Hammad, GA Alves, M Correa Martins Junior, T Martins, ME Pol, MHG Souza, WL Aldá Júnior, W Carvalho, J Chinellato, A Custódio, EM Da Costa, D De Jesus Damiao, C De Oliveira Martins, S Fonseca De Souza, H Malbouisson, M Malek, D Matos Figueiredo, L Mundim, H Nogima, WL Prado Da Silva, A Santoro, A Sznajder, EJ Tonelli Manganote, A Vilela Pereira, CA Bernardes, FA Dias, TR Fernandez Perez Tomei, EM Gregores, C Lagana, PG Mercadante, SF Novaes, Sandra S Padula, V Genchev, P Iaydjiev, S Piperov, M Rodozov, G Sultanov, 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, X Wang, Z Wang, C Asawatangtrakuldee, Y Ban, Y Guo, W Li, S Liu, Y Mao, SJ Qian, H Teng, D Wang, L Zhang, W Zou, C Avila, CA Carrillo Montoya, LF Chaparro Sierra, JP Gomez, B Gomez Moreno, JC Sanabria, N Godinovic, D Lelas, R Plestina, D Polic, I Puljak, Z Antunovic, M Kovac, V Brigljevic, K Kadija, J Luetic, D Mekterovic, S Morovic, L Tikvica, A Attikis, G Mavromanolakis, J Mousa, C Nicolaou, F Ptochos, PA Razis, M Finger, M Finger, Y Assran, S Elgammal, A Ellithi Kamel, AM Kuotb Awad, MA Mahmoud, A Radi, M Kadastik, M Müntel, M Murumaa, M Raidal, L Rebane, A Tiko, P Eerola, G Fedi, M Voutilainen, J Härkönen, 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, L Wendland, T Tuuva, M Besancon, F Couderc, 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, M Titov, S Baffioni, F Beaudette, L Benhabib, M Bluj, P Busson, C Charlot, N Daci, T Dahms, M Dalchenko, L Dobrzynski, A Florent, R Granier de Cassagnac, M Haguenauer, P Miné, C Mironov, IN Naranjo, M Nguyen, C Ochando, P Paganini, D Sabes, R Salerno, Y Sirois, C Veelken, A Zabi, J-L Agram, J Andrea, D Bloch, J-M Brom, EC Chabert, C Collard, E Conte, F Drouhin, J-C Fontaine, D Gelé, U Goerlach, C Goetzmann, P Juillot, A-C Le Bihan, P Van Hove, S Gadrat, S Beauceron, N Beaupere, G Boudoul, S Brochet, J Chasserat, R Chierici, D Contardo, P Depasse, H El Mamouni, J Fan, J Fay, S Gascon, M Gouzevitch, B Ille, T Kurca, M Lethuillier, L Mirabito, S Perries, L Sgandurra, V Sordini, M Vander Donckt, P Verdier, S Viret, H Xiao, Z Tsamalaidze, C Autermann, S Beranek, M Bontenackels, B Calpas, M Edelhoff, L Feld, N Heracleous, O Hindrichs, K Klein, 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, S Knutzen, P Kreuzer, M Merschmeyer, A Meyer, M Olschewski, K Padeken, P Papacz, H Pieta, H Reithler, SA Schmitz, L Sonnenschein, J Steggemann, D Teyssier, S Thüer, M Weber, V Cherepanov, Y Erdogan, G Flügge, H Geenen, M Geisler, W Haj Ahmad, F Hoehle, B Kargoll, T Kress, Y Kuessel, J Lingemann, A Nowack, IM Nugent, L Perchalla, O Pooth, A Stahl, I Asin, N Bartosik, J Behr, W Behrenhoff, U Behrens, AJ Bell, M Bergholz, A Bethani, K Borras, A Burgmeier, A Cakir, L Calligaris, A Campbell, S Choudhury, F Costanza, C Diez Pardos, S Dooling, T Dorland, G Eckerlin, D Eckstein, G Flucke, A Geiser, I Glushkov, A Grebenyuk, P Gunnellini, S Habib, J Hauk, G Hellwig, D Horton, H Jung, M Kasemann, P Katsas, C Kleinwort, H Kluge, M 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Kornmayer, P Lobelle Pardo, D Martschei, MU Mozer, Th Müller, M Niegel, A Nürnberg, O Oberst, J Ott, G Quast, K Rabbertz, F Ratnikov, S Röcker, F-P Schilling, G Schott, HJ Simonis, FM Stober, R Ulrich, J Wagner-Kuhr, S Wayand, T Weiler, M Zeise, G Anagnostou, G Daskalakis, T Geralis, S Kesisoglou, A Kyriakis, D Loukas, A Markou, C Markou, E Ntomari, I Topsis-giotis, L Gouskos, A Panagiotou, N Saoulidou, E Stiliaris, X Aslanoglou, I Evangelou, G Flouris, C Foudas, P Kokkas, N Manthos, I Papadopoulos, E Paradas, G Bencze, C Hajdu, P Hidas, D Horvath, F Sikler, V Veszpremi, G Vesztergombi, AJ Zsigmond, N Beni, S Czellar, J Molnar, J Palinkas, Z Szillasi, J Karancsi, P Raics, ZL Trocsanyi, B Ujvari, N Sahoo, SK Swain, SB Beri, V Bhatnagar, N Dhingra, R Gupta, M Kaur, MZ Mehta, M Mittal, N Nishu, A Sharma, JB Singh, Ashok Kumar, Arun Kumar, S Ahuja, A Bhardwaj, BC Choudhary, A Kumar, S Malhotra, M Naimuddin, K Ranjan, P Saxena, V Sharma, RK Shivpuri, S Banerjee, S Bhattacharya, K 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Everaerts, C Farrell, M Felcini, J Hauser, M Ignatenko, C Jarvis, G Rakness, P Schlein, E Takasugi, P Traczyk, V Valuev, M Weber, J Babb, R Clare, J Ellison, JW Gary, G Hanson, J Heilman, P Jandir, H Liu, OR Long, A Luthra, M Malberti, H Nguyen, A Shrinivas, J Sturdy, S Sumowidagdo, R Wilken, S Wimpenny, W Andrews, JG Branson, GB Cerati, S Cittolin, D Evans, A Holzner, R Kelley, M Lebourgeois, J Letts, I Macneill, S Padhi, C Palmer, G Petrucciani, M Pieri, M Sani, V Sharma, S Simon, E Sudano, M Tadel, Y Tu, A Vartak, S Wasserbaech, F Würthwein, A Yagil, J Yoo, D Barge, C Campagnari, T Danielson, K Flowers, P Geffert, C George, F Golf, J Incandela, C Justus, D Kovalskyi, V Krutelyov, R Magaña Villalba, N Mccoll, V Pavlunin, J Richman, R Rossin, D Stuart, W To, C West, A Apresyan, A Bornheim, J Bunn, Y Chen, E Di Marco, J Duarte, D Kcira, Y Ma, A Mott, HB Newman, C Pena, C Rogan, M Spiropulu, V Timciuc, J Veverka, R Wilkinson, S Xie, RY Zhu, V Azzolini, A Calamba, R Carroll, T Ferguson, Y Iiyama, DW Jang, YF Liu, M Paulini, J Russ, H Vogel, I Vorobiev, JP Cumalat, BR Drell, WT Ford, A Gaz, E Luiggi Lopez, U Nauenberg, JG Smith, K Stenson, KA Ulmer, SR Wagner, J Alexander, A Chatterjee, N Eggert, LK Gibbons, W Hopkins, A Khukhunaishvili, B Kreis, N Mirman, G Nicolas Kaufman, JR Patterson, A Ryd, E Salvati, W Sun, WD Teo, J Thom, J Thompson, J Tucker, Y Weng, L Winstrom, P Wittich, D Winn, S Abdullin, M Albrow, J Anderson, G Apollinari, LAT Bauerdick, A Beretvas, J Berryhill, PC Bhat, K Burkett, JN Butler, V Chetluru, HWK Cheung, F Chlebana, S Cihangir, VD Elvira, I Fisk, J Freeman, Y Gao, E Gottschalk, L Gray, D Green, O Gutsche, D Hare, RM Harris, J Hirschauer, B Hooberman, S Jindariani, M Johnson, U Joshi, K Kaadze, B Klima, S Kunori, S Kwan, J Linacre, D Lincoln, R Lipton, J Lykken, K Maeshima, JM Marraffino, VI Martinez Outschoorn, S Maruyama, D Mason, P McBride, K Mishra, S Mrenna, Y Musienko, C Newman-Holmes, V O’Dell, O Prokofyev, N Ratnikova, E Sexton-Kennedy, S Sharma, WJ Spalding, L Spiegel, L Taylor, S Tkaczyk, NV Tran, L Uplegger, EW Vaandering, R Vidal, J Whitmore, W Wu, F Yang, JC Yun, D Acosta, P Avery, D Bourilkov, M Chen, T Cheng, S Das, M De Gruttola, GP Di Giovanni, D Dobur, A Drozdetskiy, RD Field, M Fisher, Y Fu, IK Furic, J Hugon, B Kim, J Konigsberg, A Korytov, A Kropivnitskaya, T Kypreos, JF Low, K Matchev, P Milenovic, G Mitselmakher, L Muniz, R Remington, A Rinkevicius, N Skhirtladze, M Snowball, J Yelton, M Zakaria, V Gaultney, S Hewamanage, S Linn, P Markowitz, G Martinez, JL Rodriguez, T Adams, A Askew, J Bochenek, J Chen, B Diamond, J Haas, S Hagopian, V Hagopian, KF Johnson, H Prosper, V Veeraraghavan, M Weinberg, MM Baarmand, B Dorney, M Hohlmann, H Kalakhety, F Yumiceva, MR Adams, L Apanasevich, VE Bazterra, RR Betts, I Bucinskaite, J Callner, R Cavanaugh, O Evdokimov, L Gauthier, CE Gerber, DJ Hofman, S Khalatyan, P Kurt, F Lacroix, DH Moon, C O’Brien, C Silkworth, D Strom, P Turner, N Varelas, U Akgun, EA Albayrak, B Bilki, W Clarida, K Dilsiz, F Duru, S Griffiths, J-P Merlo, H Mermerkaya, A Mestvirishvili, A Moeller, J Nachtman, CR Newsom, H Ogul, Y Onel, F Ozok, S Sen, P Tan, E Tiras, J Wetzel, T Yetkin, K Yi, BA Barnett, B Blumenfeld, S Bolognesi, G Giurgiu, AV Gritsan, G Hu, P Maksimovic, C Martin, M Swartz, A Whitbeck, P Baringer, A Bean, G Benelli, RP Kenny, M Murray, D Noonan, S Sanders, R Stringer, JS Wood, AF Barfuss, I Chakaberia, A Ivanov, S Khalil, M Makouski, Y Maravin, LK Saini, S Shrestha, I Svintradze, J Gronberg, D Lange, F Rebassoo, D Wright, A Baden, B Calvert, SC Eno, JA Gomez, NJ Hadley, RG Kellogg, T Kolberg, Y Lu, M Marionneau, AC Mignerey, K Pedro, A Peterman, A Skuja, J Temple, MB Tonjes, SC Tonwar, A Apyan, G Bauer, W Busza, IA Cali, M Chan, L Di Matteo, V Dutta, G Gomez Ceballos, M Goncharov, D Gulhan, Y Kim, M Klute, YS Lai, A Levin, PD Luckey, T Ma, S Nahn, C Paus, D Ralph, C Roland, G Roland, GSF Stephans, F Stöckli, K Sumorok, D Velicanu, R Wolf, B Wyslouch, M Yang, Y Yilmaz, AS Yoon, M Zanetti, V Zhukova, B Dahmes, A De Benedetti, A Gude, J Haupt, SC Kao, K Klapoetke, Y Kubota, J Mans, N Pastika, R Rusack, M Sasseville, A Singovsky, N Tambe, J Turkewitz, JG Acosta, LM Cremaldi, R Kroeger, S Oliveros, L Perera, R Rahmat, DA Sanders, D Summers, E Avdeeva, K Bloom, S Bose, DR Claes, A Dominguez, M Eads, R Gonzalez Suarez, J Keller, I Kravchenko, J Lazo-Flores, S Malik, F Meier, GR Snow, J Dolen, A Godshalk, I Iashvili, S Jain, A Kharchilava, A Kumar, S Rappoccio, Z Wan, G Alverson, E Barberis, D Baumgartel, M Chasco, J Haley, A Massironi, D Nash, T Orimoto, D Trocino, D Wood, J Zhang, A Anastassov, KA Hahn, A Kubik, L Lusito, N Mucia, N Odell, B Pollack, A Pozdnyakov, M Schmitt, S Stoynev, K Sung, M Velasco, S Won, D Berry, A Brinkerhoff, KM Chan, M Hildreth, C Jessop, DJ Karmgard, J Kolb, K Lannon, W Luo, S Lynch, N Marinelli, DM Morse, T Pearson, M Planer, R Ruchti, J Slaunwhite, N Valls, M Wayne, M Wolf, L Antonelli, B Bylsma, LS Durkin, S Flowers, C Hill, R Hughes, K Kotov, TY Ling, D Puigh, M Rodenburg, G Smith, C Vuosalo, BL Winer, H Wolfe, E Berry, P Elmer, V Halyo, P Hebda, J Hegeman, A Hunt, P Jindal, SA Koay, P Lujan, D Marlow, T Medvedeva, M Mooney, J Olsen, P Piroué, X Quan, A Raval, H Saka, D Stickland, C Tully, JS Werner, SC Zenz, A Zuranski, E Brownson, A Lopez, H Mendez, JE Ramirez Vargas, E Alagoz, D Benedetti, G Bolla, D Bortoletto, M De Mattia, A Everett, Z Hu, M Jones, K Jung, O Koybasi, M Kress, N Leonardo, D Lopes Pegna, V Maroussov, P Merkel, DH Miller, N Neumeister, I Shipsey, D Silvers, A Svyatkovskiy, F Wang, W Xie, L Xu, HD Yoo, J Zablocki, Y Zheng, N Parashar, A Adair, B Akgun, KM Ecklund, FJM Geurts, W Li, B Michlin, BP Padley, R Redjimi, J Roberts, J Zabel, B Betchart, A Bodek, R Covarelli, P de Barbaro, R Demina, Y Eshaq, T Ferbel, A Garcia-Bellido, P Goldenzweig, J Han, A Harel, DC Miner, G Petrillo, 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, S Salur, S Schnetzer, C Seitz, S Somalwar, R Stone, S Thomas, P Thomassen, M Walker, G Cerizza, M Hollingsworth, K Rose, S Spanier, ZC Yang, A York, O Bouhali, R Eusebi, W Flanagan, J Gilmore, T Kamon, V Khotilovich, R Montalvo, I Osipenkov, Y Pakhotin, A Perloff, J Roe, A Safonov, T Sakuma, I Suarez, A Tatarinov, D Toback, N Akchurin, C Cowden, J Damgov, C Dragoiu, PR Dudero, K Kovitanggoon, SW Lee, T Libeiro, I Volobouev, E Appelt, AG Delannoy, S Greene, A Gurrola, W Johns, C Maguire, Y Mao, A Melo, M Sharma, P Sheldon, B Snook, S Tuo, J Velkovska, MW Arenton, S Boutle, B Cox, B Francis, J Goodell, R Hirosky, A Ledovskoy, C Lin, C Neu, J Wood, S Gollapinni, R Harr, PE Karchin, C Kottachchi Kankanamge Don, P Lamichhane, A Sakharov, DA Belknap, L Borrello, D Carlsmith, M Cepeda, S Dasu, S Duric, E Friis, M Grothe, R Hall-Wilton, M Herndon, A Hervé, P Klabbers, J Klukas, A Lanaro, R Loveless, A Mohapatra, I Ojalvo, T Perry, GA Pierro, G Polese, I Ross, T Sarangi, A Savin, WH Smith, J Swanson

Measurements of Higgs boson production and couplings in diboson final states with the ATLAS detector at the LHC

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 726:1-3 (2013) 88-119

Authors:

G Aad, T Abajyan, B Abbott, J Abdallah, S AbdelKhalek, O Abdinov, R Aben, B Abi, M Abolins, OS AbouZeid, H Abramowicz, H Abreu, Y Abulaiti, BS Acharya, L Adamczyk, DL Adams, TN Addy, J Adelman, S Adomeit, T Adye, S Aefsky, JA Aguilar-Saavedra, M Agustoni, SP Ahlen, A Ahmad, M Ahsan, G Aielli, TPA Åkesson, G Akimoto, AV Akimov, MA Alam, J Albert, S Albrand, MJ Alconada Verzini, M Aleksa, IN Aleksandrov, F Alessandria, C Alexa, G Alexander, G Alexandre, T Alexopoulos, M Alhroob, M Aliev, G Alimonti, L Alio, J Alison, BMM Allbrooke, LJ Allison, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, R Alon, A Alonso, F Alonso, A Altheimer, B Alvarez Gonzalez, MG Alviggi, K Amako, Y Amaral Coutinho, C Amelung, VV Ammosov, SP Amor Dos Santos, A Amorim, S Amoroso, N Amram, C Anastopoulos, LS Ancu, N Andari, T Andeen, CF Anders, G Anders, KJ Anderson, A Andreazza, V Andrei, XS Anduaga, S Angelidakis, P Anger, A Angerami, F Anghinolfi, AV Anisenkov, N Anjos, A Annovi, A Antonaki, M Antonelli, A Antonov, J Antos, F Anulli, M Aoki, L Aperio Bella, R Apolle, G Arabidze, I Aracena, Y Arai, ATH Arce, S Arfaoui, JF Arguin, S Argyropoulos, E Arik, M Arik

Abstract:

Measurements are presented of production properties and couplings of the recently discovered Higgs boson using the decays into boson pairs, H→γγ, H→ZZ*→4ℓ and H→WW*→ℓνℓν. The results are based on the complete pp collision data sample recorded by the ATLAS experiment at the CERN Large Hadron Collider at centre-of-mass energies of s=7 TeV and s=8 TeV, corresponding to an integrated luminosity of about 25 fb-1. Evidence for Higgs boson production through vector-boson fusion is reported. Results of combined fits probing Higgs boson couplings to fermions and bosons, as well as anomalous contributions to loop-induced production and decay modes, are presented. All measurements are consistent with expectations for the Standard Model Higgs boson. © 2013 CERN.

Energy calibration and resolution of the CMS electromagnetic calorimeter in pp collisions at √s = 7 TeV

Journal of Instrumentation 8:9 (2013)

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, N Hörmann, J Hrubec, M Jeitler, W Kiesenhofer, V Knünz, M Krammer, I Krätschmer, D Liko, I Mikulec, D Rabady, B Rahbaran, C Rohringer, H Rohringer, R Schöfbeck, J Strauss, A Taurok, W Treberer-Treberspurg, W Waltenberger, CE Wulz, V Mossolov, N Shumeiko, J Suarez Gonzalez, S Alderweireldt, M Bansal, S Bansal, T Cornelis, EA De Wolf, X Janssen, A Knutsson, S Luyckx, L Mucibello, S Ochesanu, B Roland, R Rougny, H Van Haevermaet, P Van Mechelen, N Van Remortel, A Van Spilbeeck, F Blekman, S Blyweert, J D'Hondt, A Kalogeropoulos, J Keaveney, M Maes, A Olbrechts, S Tavernier, W Van Doninck, P Van Mulders, GP Van Onsem, I Villella, B Clerbaux, G De Lentdecker, L Favart, APR Gay, T Hreus, A Léonard, PE Marage, A Mohammadi, T Reis, T Seva, L Thomas, C Vander Velde, P Vanlaer, J Wang, V Adler, K Beernaert, L Benucci, A Cimmino, S Costantini, S Dildick, G Garcia, B Klein, J Lellouch, A Marinov, J Mccartin, AA Ocampo Rios, D Ryckbosch, M Sigamani, N Strobbe, F Thyssen, M Tytgat, S Walsh, E Yazgan, N Zaganidis, S Basegmez, C Beluffi, G Bruno, R Castello

Abstract:

The energy calibration and resolution of the electromagnetic calorimeter (ECAL) of the CMS detector have been determined using proton-proton collision data from LHC operation in 2010 and 2011 at a centre-of-mass energy of √s = 7 TeV with integrated luminosities of about 5fb-1. Crucial aspects of detector operation, such as the environmental stability, alignment, and synchronization, are presented. The in-situ calibration procedures are discussed in detail and include the maintenance of the calibration in the challenging radiation environment inside the CMS detector. The energy resolution for electrons from Z-boson decays is better than 2% in the central region of the ECAL barrel (for pseudorapidity |η| < 0.8) and is 2-5% elsewhere. The derived energy resolution for photons from 125 GeV Higgs boson decays varies across the barrel from 1.1% to 2.6% and from 2.2% to 5% in the endcaps. The calibration of the absolute energy is determined from Ze→+e - decays to a precision of 0.4% in the barrel and 0.8% in the endcaps. © 2013 CERN for the benefit of the CMS collaboration.

Performance of jet substructure techniques for large-R jets in proton-proton collisions at √s=7 TeV using the ATLAS detector

Journal of High Energy Physics 2013:9 (2013)

Authors:

G Aad, T Abajyan, B Abbott, J Abdallah, S Abdel Khalek, AA Abdelalim, O Abdinov, R Aben, B Abi, M Abolins, OS Abouzeid, H Abramowicz, H Abreu, Y Abulaiti, BS Acharya, L Adamczyk, DL Adams, TN Addy, J Adelman, S Adomeit, T Adye, S Aefsky, JA Aguilar-Saavedra, M Agustoni, SP Ahlen, F Ahles, A Ahmad, M Ahsan, G Aielli, TPA Åkesson, G Akimoto, AV Akimov, 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, BMM Allbrooke, LJ Allison, PP Allport, SE Allwood-Spiers, J Almond, A Aloisio, R Alon, A Alonso, F Alonso, A Altheimer, B Alvarez Gonzalez, MG Alviggi, K Amako, Y Amaral Coutinho, C Amelung, VV Ammosov, SP Amor Dos Santos, A Amorim, S Amoroso, N Amram, C Anastopoulos, LS Ancu, N Andari, T Andeen, CF Anders, G Anders, KJ Anderson, A Andreazza, V Andrei, XS Anduaga, S Angelidakis, P Anger, A Angerami, F Anghinolfi, AV Anisenkov, N Anjos, A Annovi, A Antonaki, M Antonelli, A Antonov, J Antos, F Anulli, M Aoki, L Aperio Bella, R Apolle, G Arabidze, I Aracena, Y Arai, ATH Arce, S Arfaoui, JF Arguin, S Argyropoulos, E Arik, M Arik

Abstract:

This paper presents the application of a variety of techniques to study jet substructure. The performance of various modified jet algorithms, or jet grooming techniques, for several jet types and event topologies is investigated for jets with transverse momentum larger than 300 GeV. Properties of jets subjected to the mass-drop filtering, trimming, and pruning algorithms are found to have a reduced sensitivity to multiple proton-proton interactions, are more stable at high luminosity and improve the physics potential of searches for heavy boosted objects. Studies of the expected discrimination power of jet mass and jet substructure observables in searches for new physics are also presented. Event samples enriched in boosted W and Z bosons and top-quark pairs are used to study both the individual jet invariant mass scales and the efficacy of algorithms to tag boosted hadronic objects. The analyses presented use the full 2011 ATLAS dataset, corresponding to an integrated luminosity of 4.7 ± 0.1 fb-1 from proton-proton collisions produced by the Large Hadron Collider at a centre-of-mass energy of √s=7 TeV. [Figure not available: see fulltext.] © 2013 Cern for the benefit of the ATLAS collaboration.