Measurement of dijet photoproduction for events with a leading neutron at HERA
Nuclear Physics B 827:1-2 (2010) 1-33
Authors:
S Chekanov, M Derrick, S Magill, B Musgrave, D Nicholass, J Repond, R Yoshida, MCK Mattingly, P Antonioli, G Bari, L Bellagamba, D Boscherini, A Bruni, G Bruni, F Cindolo, M Corradi, G Iacobucci, A Margotti, R Nania, A Polini, S Antonelli, M Basile, M Bindi, L Cifarelli, A Contin, S De Pasquale, G Sartorelli, A Zichichi, D Bartsch, I Brock, H Hartmann, E Hilger, HP Jakob, M Jüngst, AE Nuncio-Quiroz, E Paul, U Samson, V Schönberg, R Shehzadi, M Wlasenko, JD Morris, M Kaur, P Kaur, I Singh, M Capua, S Fazio, A Mastroberardino, M Schioppa, G Susinno, E Tassi, JY Kim, ZA Ibrahim, FM Idris, B Kamaluddin, WATW Abdullah, Y Ning, Z Ren, F Sciulli, J Chwastowski, A Eskreys, J Figiel, A Galas, K Olkiewicz, B Pawlik, P Stopa, L Zawiejski, L Adamczyk, T Bołd, I Grabowska-Bołd, D Kisielewska, J Łukasik, M Przybycień, L Suszycki, A Kotański, W Słomiński, O Bachynska, O Behnke, J Behr, U Behrens, C Blohm, K Borras, D Bot, R Ciesielski, N Coppola, S Fang, A Geiser, P Göttlicher, J Grebenyuk, I Gregor, T Haas, W Hain, A Hüttmann, F Januschek, B Kahle, II Katkov, U Klein, U Kötz, H Kowalski, V Libov, M LisovyiAbstract:
Differential cross sections for dijet photoproduction and this process in association with a leading neutron, e ++p→e ++jet+jet+X(+n), have been measured with the ZEUS detector at HERA using an integrated luminosity of 40 pb -1. The fraction of dijet events with a leading neutron was studied as a function of different jet and event variables. Single- and double-differential cross sections are presented as a function of the longitudinal fraction of the proton momentum carried by the leading neutron, x L, and of its transverse momentum squared, pT2. The dijet data are compared to inclusive DIS and photoproduction results; they are all consistent with a simple pion-exchange model. The neutron yield as a function of x L was found to depend only on the fraction of the proton beam energy going into the forward region, independent of the hard process. No firm conclusion can be drawn on the presence of rescattering effects. © 2009 Elsevier B.V.Commissioning of the CMS High-Level Trigger with cosmic rays
JOURNAL OF INSTRUMENTATION 5 (2010) ARTN T03005
Authors:
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De Weirdt, O Devroede, J Heyninck, A Kalogeropoulos, J Maes, M Maes, MU Mozer, S Tavernier, W Van Doninck, P Van Mulders, I Villella, O Bouhali, EC Chabert, O Charaf, B Clerbaux, G De Lentdecker, V Dero, S Elgammal, APR Gay, GH Hammad, PE Marage, S Rugovac, C Vander Velde, P Vanlaer, J Wickens, M Grunewald, B Klein, A Marinov, D Ryckbosch, F Thyssen, M Tytgat, L Vanelderen, P Verwilligen, S Basegmez, G Bruno, J Caudron, C Delaere, P Demin, D Favart, A Giammanco, G Gregoire, V Lemaitre, O Militaru, S Ovyn, K Piotrzkowski, L Quertenmont, N Schul, N Beliy, E Daubie, GA Alves, ME Pol, MHG Souza, W Carvalho, D De Jesus Damiao, C De Oliveira Martins, S Fonseca De Souza, L Mundim, V Oguri, A Santoro, SM Silva Do Amaral, A Sznajder, TR Fernandez Perez Tomei, MA Ferreira Dias, EM Gregores, SF Novaes, K Abadjiev, T Anguelov, J Damgov, N Darmenov, L Dimitrov, V Genchev, P Iaydjiev, S Piperov, S Stoykova, G Sultanov, R Trayanov, I Vankov, A Dimitrov, M Dyulendarova, V Kozhuharov, L Litov, E 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Gotra, A Harel, S Korjenevski, DC Miner, D Orbaker, G Petrillo, D Vishnevskiy, M Zielinski, A Bhatti, L Demortier, K Goulianos, K Hatakeyama, G Lungu, C Mesropian, M Yan, O Atramentov, E Bartz, Y Gershtein, E Halkiadakis, D Hits, A Lath, K Rose, S Schnetzer, S Somalwar, R Stone, S Thomas, TL Watts, G Cerizza, M Hollingsworth, S Spanier, ZC Yang, A York, J Asaadi, A Aurisano, R Eusebi, A Golyash, A Gurrola, T Kamon, CN Nguyen, J Pivarski, A Safonov, S Sengupta, D Toback, M Weinberger, N Akchurin, L Berntzon, K Gumus, C Jeong, H Kim, SW Lee, S Popescu, Y Roh, A Sill, I Volobouev, E Washington, R Wigmans, E Yazgan, D Engh, C Florez, W Johns, S Pathak, P Sheldon, D Andelin, MW Arenton, M Balazs, S Boutle, M Buehler, S Conetti, B Cox, R Hirosky, A Ledovskoy, C Neu, Phillips D II, M Ronquest, R Yohay, S Gollapinni, K Gunthoti, R Harr, PE Karchin, M Mattson, A Sakharov, M Anderson, M Bachtis, JN Bellinger, D Carlsmith, I Crotty, S Dasu, S Dutta, J Efron, F Feyzi, K Flood, L Gray, KS Grogg, M Grothe, R Hall-Wilton, M Jaworski, P Klabbers, J Klukas, A Lanaro, C Lazaridis, J Leonard, R Loveless, M Magrans de Abril, A Mohapatra, G Ott, G Polese, D Reeder, A Savin, WH Smith, A Sourkov, J Swanson, M Weinberg, D Wenman, M Wensveen, A White, CMS CollaborationMeasurements of branching fraction ratios and CP asymmetries in B ±→DCPK± decays in hadron collisions
Physical Review D - Particles, Fields, Gravitation and Cosmology 81:3 (2010)
Authors:
T Aaltonen, J Adelman, BA González, S Amerio, D Amidei, A Anastassov, A Annovi, J Antos, G Apollinari, A Apresyan, T Arisawa, A Artikov, J Asaadi, W Ashmanskas, A Attal, A Aurisano, F Azfar, W Badgett, A Barbaro-Galtieri, VE Barnes, BA Barnett, P Barria, P Bartos, G Bauer, PH Beauchemin, F Bedeschi, D Beecher, S Behari, G Bellettini, J Bellinger, D Benjamin, A Beretvas, A Bhatti, M Binkley, D Bisello, I Bizjak, RE Blair, C Blocker, B Blumenfeld, A Bocci, A Bodek, V Boisvert, D Bortoletto, J Boudreau, A Boveia, B Brau, A Bridgeman, L Brigliadori, C Bromberg, E Brubaker, J Budagov, HS Budd, S Budd, K Burkett, G Busetto, P Bussey, A Buzatu, KL Byrum, S Cabrera, C Calancha, S Camarda, M Campanelli, M Campbell, F Canelli, A Canepa, 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, SH Chang, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, K Cho, D Chokheli, JP Chou, K Chung, WH Chung, YS Chung, T Chwalek, CI Ciobanu, MA Ciocci, A Clark, D Clark, G Compostella, ME Convery, J Conway, M CorboAbstract:
We reconstruct B±→DK± decays in a data sample collected by the CDF II detector at the Tevatron collider corresponding to 1fb-1 of integrated luminosity. We select decay modes where the D meson decays to either K-π+ (flavor eigenstate) or K-K+, π-π+ (CP-even eigenstates), and measure the direct CP asymmetry ACP+=0.39±0. 17(stat)±0.04(syst), and the double ratio of CP-even to flavor eigenstate branching fractions RCP+=1.30±0.24(stat)±0.12(syst). These measurements will improve the determination of the Cabibbo-Kobayashi-Maskawa angle γ. They are performed here for the first time using data from hadron collisions. © 2010 The American Physical Society.Measurement of the ttbar Production Cross Section in ppbar Collisions at sqrt(s)=1.96 TeV using Soft Electron b-Tagging
ArXiv 1002.3783 (2010)
Authors:
CDF Collaboration, T AaltonenMeasurement of the top quark mass in the dilepton channel using mT2 at CDF
Physical Review D - Particles, Fields, Gravitation and Cosmology 81:3 (2010)