First search for exotic Z Boson decays into photons and neutral pions in hadron collisions.

Physical review letters 112:11 (2014) 111803

Authors:

T Aaltonen, 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, 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, P Butti, A Buzatu, A Calamba, S Camarda, M Campanelli, F Canelli, B Carls, D Carlsmith, R Carosi, S Carrillo, 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, K Cho, D Chokheli, A Clark, C Clarke, ME Convery, J Conway, M Corbo, M Cordelli, CA Cox, DJ Cox, M Cremonesi, D Cruz, J Cuevas, R Culbertson, N d'Ascenzo, M Datta, P de Barbaro, L Demortier, M Deninno, M D'Errico, F Devoto, A Di Canto, B Di Ruzza, JR Dittmann, S Donati, M D'Onofrio, M Dorigo, A Driutti, K Ebina, R Edgar, A Elagin, R Erbacher, S Errede, B Esham, S Farrington, JP Fernández Ramos, R Field, G Flanagan, R Forrest, M Franklin, JC Freeman, H Frisch, Y Funakoshi, C Galloni, AF Garfinkel, P Garosi, H Gerberich, E Gerchtein, S Giagu, V Giakoumopoulou, K Gibson, CM Ginsburg, N Giokaris, P Giromini, G Giurgiu, V Glagolev, D Glenzinski, M Gold, D Goldin, A Golossanov, G Gomez, G Gomez-Ceballos, M Goncharov, O González López, I Gorelov, AT Goshaw, K Goulianos, E Gramellini, S Grinstein, C Grosso-Pilcher, RC Group, J Guimaraes da Costa, SR Hahn, JY Han, F Happacher, K Hara, M Hare, RF Harr, T Harrington-Taber, K Hatakeyama, C Hays, J Heinrich, M Herndon, A Hocker, Z Hong, W Hopkins, S Hou, RE Hughes, U Husemann, M Hussein, J Huston, G Introzzi, M Iori, A Ivanov, E James, D Jang, B Jayatilaka, EJ Jeon, S Jindariani, M Jones, KK Joo, SY Jun, TR Junk, M Kambeitz, T Kamon, PE Karchin, A Kasmi, Y Kato, W Ketchum, J Keung, B Kilminster, DH Kim, HS Kim, JE Kim, MJ Kim, SH Kim, SB Kim, YJ Kim, YK Kim, N Kimura, M Kirby, K Knoepfel, K Kondo, DJ Kong, J Konigsberg, AV Kotwal, M Kreps, J Kroll, M Kruse, T Kuhr, M Kurata, AT Laasanen, S Lammel, M Lancaster, K Lannon, G Latino, HS Lee, JS Lee, S Leo, S Leone, JD Lewis, A Limosani, E Lipeles, A Lister, H Liu, Q Liu, T Liu, S Lockwitz, A Loginov, D Lucchesi, A Lucà, J Lueck, P Lujan, P Lukens, G Lungu, J Lys, R Lysak, R Madrak, P Maestro, S Malik, G Manca, A Manousakis-Katsikakis, L Marchese, F Margaroli, P Marino, M Martínez, K Matera, ME Mattson, A Mazzacane, P Mazzanti, R McNulty, A Mehta, P Mehtala, C Mesropian, T Miao, D Mietlicki, A Mitra, H Miyake, S Moed, N Moggi, CS Moon, R Moore, MJ Morello, A Mukherjee, Th Muller, P Murat, M Mussini, J Nachtman, Y Nagai, J Naganoma, I Nakano, A Napier, J Nett, C Neu, T Nigmanov, L Nodulman, SY Noh, O Norniella, L Oakes, SH Oh, YD Oh, I Oksuzian, T Okusawa, R Orava, L Ortolan, C Pagliarone, E Palencia, P Palni, V Papadimitriou, W Parker, G Pauletta, M Paulini, C Paus, TJ Phillips, G Piacentino, E Pianori, J Pilot, K Pitts, C Plager, L Pondrom, S Poprocki, K Potamianos, A Pranko, F Prokoshin, F Ptohos, G Punzi, N Ranjan, I Redondo Fernández, P Renton, M Rescigno, F Rimondi, L Ristori, A Robson, T Rodriguez, S Rolli, M Ronzani, R Roser, JL Rosner, F Ruffini, A Ruiz, J Russ, V Rusu, WK Sakumoto, Y Sakurai, L Santi, K Sato, V Saveliev, A Savoy-Navarro, P Schlabach, EE Schmidt, T Schwarz, L Scodellaro, F Scuri, S Seidel, Y Seiya, A Semenov, F Sforza, SZ Shalhout, T Shears, PF Shepard, M Shimojima, M Shochet, I Shreyber-Tecker, A Simonenko, K Sliwa, JR Smith, FD Snider, H Song, V Sorin, R St Denis, M Stancari, D Stentz, J Strologas, Y Sudo, A Sukhanov, I Suslov, K Takemasa, Y Takeuchi, J Tang, M Tecchio, PK Teng, J Thom, E Thomson, V Thukral, D Toback, S Tokar, K Tollefson, T Tomura, D Tonelli, S Torre, D Torretta, P Totaro, M Trovato, F Ukegawa, S Uozumi, F Vázquez, G Velev, C Vellidis, C Vernieri, M Vidal, R Vilar, J Vizán, M Vogel, G Volpi, P Wagner, R Wallny, SM Wang, D Waters, WC Wester Iii, D Whiteson, AB Wicklund, S Wilbur, HH Williams, JS Wilson, P Wilson, BL Winer, P Wittich, S Wolbers, H Wolfe, T Wright, X Wu, Z Wu, K Yamamoto, D Yamato, T Yang, UK Yang, YC Yang, W-M Yao, GP Yeh, K Yi, J Yoh, K Yorita, T Yoshida, GB Yu, I Yu, AM Zanetti, Y Zeng, C Zhou, S Zucchelli, CDF Collaboration

Abstract:

A search for forbidden and exotic Z boson decays in the diphoton mass spectrum is presented for the first time in hadron collisions, based on data corresponding to 10.0 fb(-1) of integrated luminosity from proton-antiproton collisions at √s = 1.96 TeV collected by the CDF experiment. No evidence of signal is observed, and 95% credibility level Bayesian upper limits are set on the branching ratios of decays of the Z boson to a photon and neutral pion (which is detected as a photon), a pair of photons, and a pair of neutral pions. The observed branching ratio limits are 2.01 × 10(-5) for Z → π(0)γ, 1.46 × 10(-5) for Z → γγ, and 1.52 × 10(-5) for Z → π(0)π(0). The Z → π(0)γ and Z → γγ limits improve the most stringent results from other experiments by factors of 2.6 and 3.6, respectively. The Z → π(0)π(0) branching ratio limit is the first experimental result on this decay.

Study of double parton scattering using W + 2-jet events in proton-proton collisions at = 7 TeV

Journal of High Energy Physics Springer Nature 2014:3 (2014) 32

Authors:

The CMS collaboration, S Chatrchyan, V Khachatryan, AM Sirunyan, A Tumasyan, W Adam, T Bergauer, M Dragicevic, J Erö, C Fabjan, M Friedl, R Frühwirth, VM Ghete, C Hartl, N Hörmann, J Hrubec, M Jeitler, W Kiesenhofer, V Knünz, M Krammer, I Krätschmer, D Liko, I Mikulec, D Rabady, B Rahbaran, 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, H Van Haevermaet, P Van Mechelen, N Van Remortel, A Van Spilbeeck, F Blekman, S Blyweert, J D’Hondt, N Heracleous, A Kalogeropoulos, J Keaveney, TJ Kim, S Lowette, M Maes, A Olbrechts, D Strom, S Tavernier, W Van Doninck, P Van Mulders, GP Van Onsem, I Villella, C Caillol, B Clerbaux, G De Lentdecker, L Favart, APR Gay, 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, J Mccartin, AA Ocampo Rios, D Ryckbosch, S Salva Diblen, 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, M Komm, V Lemaitre, J Liao, O Militaru, C Nuttens, D Pagano, A Pin, K Piotrzkowski, A Popov, L Quertenmont, M Selvaggi, M Vidal Marono, JM Vizan Garcia, N Beliy, T Caebergs, E Daubie, GH Hammad, GA Alves, M Correa Martins, T Martins, ME Pol, MHG Souza, WL Aldá, 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, J Santaolalla, 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, A Marinov, S Piperov, M Rodozov, G Sultanov, M Vutova, A Dimitrov, I Glushkov, R Hadjiiska, V Kozhuharov, L Litov, B Pavlov, P Petkov, JG Bian, GM Chen, HS Chen, M Chen, R Du, CH Jiang, D Liang, S Liang, X Meng, R Plestina, J Tao, X Wang, Z Wang, C Asawatangtrakuldee, Y Ban, Y Guo, Q Li, W Li, S Liu, Y Mao, SJ Qian, D Wang, L Zhang, W Zou, C Avila, CA Carrillo Montoya, LF Chaparro Sierra, C Florez, JP Gomez, B Gomez Moreno, JC Sanabria, N Godinovic, D Lelas, 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, AA Abdelalim, Y Assran, S Elgammal, A Ellithi Kamel, 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, A Nayak, J Rander, A Rosowsky, M Titov, S Baffioni, F Beaudette, P Busson, C Charlot, N Daci, T Dahms, M Dalchenko, L Dobrzynski, A Florent, R Granier de Cassagnac, P Miné, C Mironov, IN Naranjo, M Nguyen, C Ochando, P Paganini, D Sabes, R Salerno, Y Sirois, C Veelken, Y Yilmaz, 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, JD Ruiz Alvarez, L Sgandurra, V Sordini, M Vander Donckt, P Verdier, S Viret, H 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Quittnat, FJ Ronga, M Rossini, A Starodumov, M Takahashi, L Tauscher, K Theofilatos, D Treille, R Wallny, HA Weber, C Amsler, V Chiochia, A De Cosa, C Favaro, A Hinzmann, T Hreus, M Ivova Rikova, B Kilminster, B Millan Mejias, J Ngadiuba, P Robmann, H Snoek, S Taroni, M Verzetti, Y Yang, M Cardaci, KH Chen, C Ferro, CM Kuo, SW Li, W Lin, YJ Lu, R Volpe, SS Yu, P Bartalini, P Chang, YH Chang, YW Chang, Y Chao, KF Chen, PH Chen, C Dietz, U Grundler, W-S Hou, Y Hsiung, KY Kao, YJ Lei, YF Liu, R-S Lu, D Majumder, E Petrakou, X Shi, JG Shiu, YM Tzeng, M Wang, R Wilken, B Asavapibhop, N Suwonjandee, A Adiguzel, MN Bakirci, S Cerci, C Dozen, I Dumanoglu, E Eskut, S Girgis, G Gokbulut, E Gurpinar, I Hos, EE Kangal, A Kayis Topaksu, G Onengut, K Ozdemir, S Ozturk, A Polatoz, K Sogut, D Sunar Cerci, B Tali, H Topakli, M Vergili, IV Akin, T Aliev, B Bilin, S Bilmis, M Deniz, H Gamsizkan, AM Guler, G Karapinar, K Ocalan, A Ozpineci, M Serin, R Sever, UE Surat, M Yalvac, M Zeyrek, E Gülmez, B Isildak, M Kaya, O Kaya, S Ozkorucuklu, H Bahtiyar, E Barlas, K Cankocak, YO Günaydin, FI Vardarlı, M Yücel, L Levchuk, P Sorokin, JJ Brooke, E Clement, D Cussans, H Flacher, R Frazier, J Goldstein, M Grimes, GP Heath, HF Heath, J Jacob, L Kreczko, C Lucas, Z Meng, DM Newbold, S Paramesvaran, A Poll, S Senkin, VJ Smith, T Williams, KW Bell, A Belyaev, C Brew, RM Brown, DJA Cockerill, JA Coughlan, K Harder, S Harper, J Ilic, E Olaiya, D Petyt, CH Shepherd-Themistocleous, A Thea, IR Tomalin, WJ Womersley, SD Worm, M Baber, R Bainbridge, O Buchmuller, D Burton, D Colling, N Cripps, M Cutajar, P Dauncey, G Davies, M Della Negra, W Ferguson, J Fulcher, D Futyan, A Gilbert, A Guneratne Bryer, G Hall, Z Hatherell, J Hays, G Iles, M Jarvis, G Karapostoli, M Kenzie, R Lane, R Lucas, L Lyons, A-M Magnan, J Marrouche, B Mathias, R Nandi, J Nash, A Nikitenko, J Pela, M Pesaresi, K Petridis, M Pioppi, DM Raymond, S Rogerson, A Rose, C Seez, P Sharp, A Sparrow, A Tapper, M Vazquez Acosta, T Virdee, 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Babb, R Clare, J Ellison, JW Gary, G Hanson, J Heilman, P Jandir, F Lacroix, H Liu, OR Long, A Luthra, M Malberti, H Nguyen, A Shrinivas, J Sturdy, S Sumowidagdo, S Wimpenny, W Andrews, JG Branson, GB Cerati, S Cittolin, RT D’Agnolo, D Evans, A Holzner, R Kelley, D Kovalskyi, M Lebourgeois, J Letts, I Macneill, S Padhi, C Palmer, 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, 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, A Mott, HB Newman, C Pena, C Rogan, M Spiropulu, V Timciuc, R Wilkinson, S Xie, RY Zhu, V Azzolini, A Calamba, R Carroll, T Ferguson, Y Iiyama, DW Jang, 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, S Grünendahl, O Gutsche, D Hare, RM Harris, J Hirschauer, B Hooberman, S Jindariani, M Johnson, U Joshi, K Kaadze, B Klima, 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, S Nahn, 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, A Whitbeck, J Whitmore, W Wu, F Yang, JC Yun, D Acosta, P Avery, D Bourilkov, T Cheng, S Das, M De Gruttola, GP Di Giovanni, D Dobur, 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, A Rinkevicius, L Shchutska, 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, R Cavanaugh, O Evdokimov, L Gauthier, CE Gerber, DJ Hofman, S Khalatyan, P Kurt, DH Moon, C O’Brien, C Silkworth, P Turner, N Varelas, U Akgun, EA Albayrak, B Bilki, W Clarida, K Dilsiz, F Duru, M Haytmyradov, J-P Merlo, H Mermerkaya, A Mestvirishvili, A Moeller, J Nachtman, H Ogul, Y Onel, F Ozok, S Sen, P Tan, E Tiras, J Wetzel, T Yetkin, K Yi, BA Barnett, B Blumenfeld, S Bolognesi, D Fehling, AV Gritsan, P Maksimovic, C Martin, M Swartz, P Baringer, A Bean, G Benelli, RP Kenny, M Murray, D Noonan, S Sanders, J Sekaric, R Stringer, Q Wang, 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 Skuja, J Temple, MB Tonjes, SC Tonwar, A Apyan, R Barbieri, G Bauer, W Busza, IA Cali, M Chan, L Di Matteo, V Dutta, G Gomez Ceballos, M Goncharov, D Gulhan, M Klute, YS Lai, Y-J Lee, A Levin, PD Luckey, T Ma, C Paus, D Ralph, C Roland, G Roland, GSF Stephans, F Stöckli, K Sumorok, D Velicanu, J Veverka, B Wyslouch, M Yang, AS Yoon, M Zanetti, V Zhukova, B Dahmes, A De Benedetti, A Gude, SC Kao, K Klapoetke, Y Kubota, J Mans, N Pastika, R Rusack, 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, R Gonzalez Suarez, J Keller, D Knowlton, 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, A Drozdetskiy, M Hildreth, C Jessop, DJ Karmgard, N Kellams, 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, A Woodard, 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, HW Wulsin, 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, M Kress, N Leonardo, D Lopes Pegna, V Maroussov, P Merkel, DH Miller, N Neumeister, BC Radburn-Smith, 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, K Rose, S Spanier, ZC Yang, A York, O Bouhali, R Eusebi, W Flanagan, J Gilmore, T Kamon, V Khotilovich, V Krutelyov, 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, S Kunori, 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, 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, A Levine, R Loveless, A Mohapatra, I Ojalvo, T Perry, GA Pierro, G Polese, I Ross, A Sakharov, T Sarangi, A Savin, WH Smith

Measuring the transition to homogeneity with photometric redshift surveys

Monthly Notices of the Royal Astronomical Society Oxford University Press 440:1 (2014) 10-23

Authors:

David Alonso, A Bueno Belloso, FJ Sanchez, J Garcia-Bellido, E Sanchez

Abstract:

We study the possibility of detecting the transition to homogeneity using photometric redshift catalogues. Our method is based on measuring the fractality of the projected galaxy distribution, using angular distances, and relies only on observable quantities. It thus provides a way to test the cosmological principle in a model-independent unbiased way. We have tested our method on different synthetic inhomogeneous catalogues and shown that it is capable of discriminating some fractal models with relatively large fractal dimensions, in spite of the loss of information due to the radial projection. We have also studied the influence of the redshift bin width, photometric redshift errors, bias, non-linear clustering, and surveyed area on the angular homogeneity index H2(θ) in a Λ cold dark matter cosmology. The level to which an upcoming galaxy survey will be able to constrain the transition to homogeneity will depend mainly on the total surveyed area and the compactness of the surveyed region. In particular, a Dark Energy Survey (DES)-like survey should be able to easily discriminate certain fractal models with fractal dimensions as large as D2 = 2.95. We believe that this method will have relevant applications for upcoming large photometric redshift surveys, such as DES or the Large Synoptic Survey Telescope.

Study of Top-Quark Production and Decays involving a Tau Lepton at CDF and Limits on a Charged-Higgs Boson Contribution

(2014)

Authors:

CDF Collaboration, T Aaltonen, 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, 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, P Butti, A Buzatu, A Calamba, S Camarda, M Campanelli, F Canelli, B Carls, D Carlsmith, R Carosi, S Carrillo, 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, K Cho, D Chokheli, A Clark, C Clarke, ME Convery, J Conway, M Corbo, M Cordelli, CA Cox, DJ Cox, M Cremonesi, D Cruz, J Cuevas, R Culbertson, N d'Ascenzo, M Datta, P de Barbaro, L Demortier, L Marchese, M Deninno, F Devoto, M D'Errico, A Di Canto, B Di Ruzza, JR Dittmann, M D'Onofrio, S Donati, M Dorigo, A Driutti, K Ebina, R Edgar, A Elagin, R Erbacher, S Errede, B Esham, S Farrington, JP Fernández Ramos, R Field, G Flanagan, R Forrest, M Franklin, JC Freeman, H Frisch, Y Funakoshi, C Galloni, AF Garfinkel, P Garosi, H Gerberich, E Gerchtein, S Giagu, V Giakoumopoulou, K Gibson, CM Ginsburg, N Giokaris, P Giromini, G Giurgiu, V Glagolev, D Glenzinski, M Gold, D Goldin, A Golossanov, G Gomez, G Gomez-Ceballos, M Goncharov, O González López, I Gorelov, AT Goshaw, K Goulianos, E Gramellini, S Grinstein, C Grosso-Pilcher, RC Group, J Guimaraes da Costa, SR Hahn, JY Han, F Happacher, K Hara, M Hare, RF Harr, T Harrington-Taber, K Hatakeyama, C Hays, J Heinrich, M Herndon, A Hocker, Z Hong, W Hopkins, S Hou, RE Hughes, U Husemann, M Hussein, J Huston, G Introzzi, M Iori, A Ivanov, E James, D Jang, B Jayatilaka, EJ Jeon, S Jindariani, M Jones, KK Joo, SY Jun, TR Junk, M Kambeitz, T Kamon, PE Karchin, A Kasmi, Y Kato, W Ketchum, J Keung, B Kilminster, DH Kim, HS Kim, JE Kim, MJ Kim, SB Kim, SH Kim, YK Kim, YJ Kim, N Kimura, M Kirby, K Knoepfel, K Kondo, DJ Kong, J Konigsberg, AV Kotwal, M Kreps, J Kroll, M Kruse, T Kuhr, M Kurata, AT Laasanen, S Lammel, M Lancaster, K Lannon, G Latino, HS Lee, JS Lee, S Leo, S Leone, JD Lewis, A Limosani, E Lipeles, A Lister, H Liu, Q Liu, T Liu, S Lockwitz, A Loginov, A Lucà, D Lucchesi, J Lueck, P Lujan, P Lukens, G Lungu, J Lys, R Lysak, R Madrak, P Maestro, S Malik, G Manca, A Manousakis-Katsikakis, F Margaroli, P Marino, M Martínez, K Matera, ME Mattson, A Mazzacane, P Mazzanti, R McNulty, A Mehta, P Mehtala, C Mesropian, T Miao, D Mietlicki, A Mitra, H Miyake, S Moed, N Moggi, CS Moon, R Moore, MJ Morello, A Mukherjee, Th Muller, P Murat, M Mussini, J Nachtman, Y Nagai, J Naganoma, I Nakano, A Napier, J Nett, C Neu, T Nigmanov, L Nodulman, SY Noh, O Norniella, L Oakes, SH Oh, YD Oh, I Oksuzian, T Okusawa, R Orava, L Ortolan, C Pagliarone, E Palencia, P Palni, V Papadimitriou, W Parker, G Pauletta, M Paulini, C Paus, TJ Phillips, G Piacentino, E Pianori, J Pilot, K Pitts, C Plager, L Pondrom, S Poprocki, K Potamianos, F Prokoshin, A Pranko, F Ptohos, G Punzi, N Ranjan, I Redondo Fernández, P Renton, M Rescigno, F Rimondi, L Ristori, C Rizzi, A Robson, T Rodriguez, S Rolli, M Ronzani, R Roser, JL Rosner, F Ruffini, A Ruiz, J Russ, V Rusu, WK Sakumoto, Y Sakurai, L Santi, K Sato, V Saveliev, A Savoy-Navarro, P Schlabach, EE Schmidt, T Schwarz, L Scodellaro, F Scuri, S Seidel, Y Seiya, A Semenov, F Sforza, SZ Shalhout, T Shears, PF Shepard, M Shimojima, M Shochet, I Shreyber-Tecker, A Simonenko, K Sliwa, JR Smith, FD Snider, V Sorin, H Song, M Stancari, R St Denis, D Stentz, J Strologas, Y Sudo, A Sukhanov, I Suslov, K Takemasa, Y Takeuchi, J Tang, M Tecchio, PK Teng, J Thom, E Thomson, V Thukral, D Toback, S Tokar, K Tollefson, T Tomura, D Tonelli, S Torre, D Torretta, P Totaro, M Trovato, F Ukegawa, S Uozumi, F Vázquez, G Velev, C Vellidis, C Vernieri, M Vidal, R Vilar, J Vizán, M Vogel, G Volpi, P Wagner, R Wallny, SM Wang, D Waters, WC Wester, D Whiteson, AB Wicklund, S Wilbur, HH Williams, JS Wilson, P Wilson, BL Winer, P Wittich, S Wolbers, H Wolfe, T Wright, X Wu, Z Wu, K Yamamoto, D Yamato, T Yang, UK Yang, YC Yang, W-M Yao, GP Yeh, K Yi, J Yoh, K Yorita, T Yoshida, GB Yu, I Yu, AM Zanetti, Y Zeng, C Zhou, S Zucchelli

Testbeam and Laboratory Characterization of CMS 3D Pixel Sensors

ArXiv 1402.6384 (2014)

Authors:

M Bubna, E Alagoz, A Krzywda, O Koybasi, K Arndt, D Bortoletto, I Shipsey, G Bolla, A Kok, T-E Hansen, TA Hansen, GU Jensen, JM Brom, M Boscardin, J Chramowicz, J Cumalat, GF Dalla Betta, M Dinardo, A Godshalk, M Jones, MD Krohn, A Kumar, CM Lei, L Moroni, L Perera, M Povoli, A Prosser, R Rivera, A Solano, MM Obertino, S Kwan, L Uplegger, CD Via, L Vigani, S Wagner

Abstract:

The pixel detector is the innermost tracking device in CMS, reconstructing interaction vertices and charged particle trajectories. The sensors located in the innermost layers of the pixel detector must be upgraded for the ten-fold increase in luminosity expected with the High- Luminosity LHC (HL-LHC) phase. As a possible replacement for planar sensors, 3D silicon technology is under consideration due to its good performance after high radiation fluence. In this paper, we report on pre- and post- irradiation measurements for CMS 3D pixel sensors with different electrode configurations. The effects of irradiation on electrical properties, charge collection efficiency, and position resolution of 3D sensors are discussed. Measurements of various test structures for monitoring the fabrication process and studying the bulk and surface properties, such as MOS capacitors, planar and gate-controlled diodes are also presented.