Measurement of CP-violation asymmetries in D0 to Ks pi+ pi-
ArXiv 1207.0825 (2012)
Authors:
CDF Collaboration, T Aaltonen, B Alvarez Gonzalez, 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, A Di Canto, B Di Ruzza, JR Dittmann, M D'Onofrio, S Donatig, P Dong, M Dorigo, T Dorigo, K Ebina, A Elagin, A Eppig, R Erbacher, S Errede, N Ershaidat, R Eusebi, S Farrington, M Feindt, JP Fernandez, R Field, G Flanagan, R Forrest, MJ Frank, M Franklin, JC Freeman, Y Funakoshi, I Furic, M Gallinaro, JE Garcia, AF Garfinkel, P Garosi, H Gerberich, E Gerchtein, S Giagu, V Giakoumopoulou, P Giannetti, K Gibson, CM Ginsburg, N Giokaris, P Giromini, G Giurgiu, V Glagolev, D Glenzinski, M Gold, D Goldin, N Goldschmidt, A Golossanov, G Gomez, G Gomez-Ceballos, M Goncharov, O Gonzalez, I Gorelov, AT Goshaw, K Goulianos, S Grinstein, C Grosso-Pilcher, RC Group, J Guimaraes da Costa, SR Hahn, E Halkiadakis, A Hamaguchi, JY Han, F Happacher, K Hara, D Hare, M Hare, RF Harr, K Hatakeyama, C Hays, M Heck, J Heinrich, M Herndon, S Hewamanage, A Hocker, W Hopkins, D Horn, S Hou, RE Hughes, M Hurwitz, U Husemann, N Hussain, 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, T Kamon, PE Karchin, A Kasmi, Y Kato, W Ketchum, J Keung, V Khotilovich, B Kilminster, DH Kim, HS Kim, JE Kim, MJ Kim, SB Kim, SH Kim, YK Kim, YJ Kim, N Kimura, M Kirby, S Klimenko, K Knoepfel, K Kondo, DJ Kong, J Konigsberg, AV Kotwal, M Kreps, J Kroll, D Krop, M Kruse, V Krutelyov, T Kuhr, M Kurata, S Kwang, AT Laasanen, S Lami, S Lammel, M Lancaster, RL Lander, K Lannon, A Lath, G Latino, T LeCompte, E Lee, HS Lee, JS Lee, SW Lee, S Leo, S Leone, JD Lewis, A Limosani, C-J Lin, M Lindgren, E Lipeles, A Lister, DO Litvintsev, C Liu, H Liu, Q Liu, T Liu, S Lockwitz, A Loginov, D Lucchesi, J Lueck, P Lujan, P Lukens, G Lungu, J Lys, R Lysak, R Madrak, K Maeshima, P Maestro, S Malik, G Manca, A Manousakis-Katsikakis, F Margaroli, C Marino, M Martinez P Mastrandrea, K Matera, ME Mattson, A Mazzacane, P Mazzanti, KS McFarland, P McIntyre, R McNulty, A Mehta, P Mehtala, C Mesropian, T Miao, D Mietlicki, A Mitra, H Miyake, S Moed, N Moggi, MN Mondragon, CS Moon, R Moore, MJ Morello, J Morlock, P Movilla Fernandez, A Mukherjee, Th Muller, P Murat, M Mussini, J Nachtman, Y Nagai, J Naganoma, I Nakano, A Napier, J Nett, C Neu, MS Neubauer, J Nielsen, L Nodulman, SY Noh, O Norniella, L Oakes, SH Oh, YD Oh, I Oksuzian, T Okusawa, R Orava, L Ortolan, S Pagan Griso, C Pagliarone, E Palencia, V Papadimitriou, AA Paramonov, J Patrick, G Pauletta, M Paulini, C Paus, DE Pellett, A Penzo, 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, A Rahaman, V Ramakrishnan, N Ranjan, I Redondo, P Renton, M Rescigno, T Riddick, F Rimondi, L Ristori, A Robson, T Rodrigo, T Rodriguez, E Rogers, S Rolli, R Roser, F Ruffini, A Ruiz, J Russ, V Rusu, A Safonov, WK Sakumoto, Y Sakurai, L Santi, K Sato, V Saveliev, A Savoy-Navarro, P Schlabach, A Schmidt, EE Schmidt, T Schwarz, L Scodellaro, A Scribano, 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, P Sinervo, K Sliwa, JR Smith, FD Snider, A Soha, V Sorin, H Song, P Squillacioti, M Stancari, R St Denis, B Stelzer, O Stelzer-Chilton, D Stentz, J Strologas, GL Strycker, Y Sudo, A Sukhanov, I Suslov, K Takemasa, Y Takeuchi, J Tang, M Tecchio, PK Teng, J Thom, J Thome, GA Thompson, E Thomson, D Toback, S Tokar, K Tollefson, T Tomura, D Tonelli, S Torre, D Torretta, P Totaro, M Trovato, F Ukegawa, S Uozumi, A Varganov, F Vazquez, G Velev, C Vellidis, M Vidal, I Vila, R Vilar, J Vizan, M Vogel, G Volpi, P Wagner, RL Wagner, T Wakisaka, R Wallny, SM Wang, A Warburton, D Waters, WC Wester III, D Whiteson, AB Wicklund, E Wicklund, S Wilbur, F Wick, 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, SS Yu, JC Yun, A Zanetti, Y Zeng, C Zhou, S ZucchelliAbstract:
We report a measurement of time-integrated CP-violation asymmetries in the resonant substructure of the three-body decay D0 to Ks pi+ pi- using CDF II data corresponding to 6.0 invfb of integrated luminosity from Tevatron ppbar collisions at sqrt(s) = 1.96 TeV. The charm mesons used in this analysis come from D*+(2010) to D0 pi+ and D*-(2010) to D0bar pi-, where the production flavor of the charm meson is determined by the charge of the accompanying pion. We apply a Dalitz-amplitude analysis for the description of the dynamic decay structure and use two complementary approaches, namely a full Dalitz-plot fit employing the isobar model for the contributing resonances and a model-independent bin-by-bin comparison of the D0 and D0bar Dalitz plots. We find no CP-violation effects and measure an asymmetry of ACP = (-0.05 +- 0.57 (stat) +- 0.54 (syst))% for the overall integrated CP-violation asymmetry, consistent with the standard model prediction.Measurement of the mass difference between top and antitop quarks
Journal of High Energy Physics Springer Nature 2012:6 (2012) 109
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, 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, C-E Wulz, V Mossolov, N Shumeiko, J Suarez Gonzalez, S Bansal, K Cerny, 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, T Hreus, A Léonard, PE Marage, T Reis, L Thomas, C Vander Velde, P Vanlaer, 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, C Delaere, T du Pree, D Favart, L Forthomme, A Giammanco, J Hollar, V Lemaitre, J Liao, O Militaru, C Nuttens, D Pagano, A Pin, K Piotrzkowski, N Schul, 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, 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, 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, C Avila, 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, 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 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, 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, M Karim, A-C Le Bihan, P Van Hove, F Fassi, D Mercier, S Beauceron, N Beaupere, O Bondu, G Boudoul, H Brun, 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, 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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, D Engh, C Florez, S Greene, A Gurrola, W Johns, 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, GA Pierro, I Ross, A Savin, WH Smith, J SwansonEvidence for the charmless annihilation decay mode Bs0→π +π-
Physical Review Letters 108:21 (2012)
Authors:
T Aaltonen, B Álvarez 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'erricoAbstract:
We search for annihilation decay modes of neutral b mesons into pairs of charmless charged hadrons with the upgraded Collider Detector at the Fermilab Tevatron. Using a data sample corresponding to 6fb-1 of integrated luminosity, we obtain the first evidence for the Bs0→π+π - decay, with a significance of 3.7σ, and a measured branching ratio B(Bs0→π+π-)=(0.57±0.15(stat) ±0.10(syst))×10-6. A search for the B0→K +K- mode in the same sample yields a significance of 2.0σ, and a central value estimate B(B0→K+K -)=(0.23±0.10(stat)±0.10(syst))×10-6. © 2012 American Physical Society.Search for a heavy particle decaying to a top quark and a light quark in pp̄ collisions at √s=1.96TeV
Physical Review Letters 108:21 (2012)
Authors:
T Aaltonen, J Adelman, B Álvarez 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 DevotoAbstract:
We present a search for a new heavy particle X produced in association with a top quark, pp̄→t(X→t̄q) or pp̄→t̄(X̄ →tq̄), where q stands for up quarks and down quarks. Such a particle may explain the recent anomalous measurements of top-quark forward-backward asymmetry. If the light-flavor quark (q) is reconstructed as a jet (j), this gives a t̄+j or t+j resonance in tt̄+jet events, a previously unexplored experimental signature. In a sample of events with exactly one lepton, missing transverse momentum and at least five jets, corresponding to an integrated luminosity of 8.7fb-1 collected by the CDF II detector, we find the data to be consistent with the standard model. We set cross-section upper limits on the production (pp̄→Xt or X̄t̄) at 95% confidence level from 0.61 pb to 0.02 pb for X masses ranging from 200GeV/c2 to 800GeV/c2, respectively. © 2012 American Physical Society.Measurement of the masses and widths of the bottom baryons Σb± and Σb*±
Physical Review D - Particles, Fields, Gravitation and Cosmology 85:9 (2012)