8,721 research outputs found

    Asymmetries in top quark pair production at hadron colliders

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    We review the asymmetries in top quark pair production at the Tevatron and the LHC. We summarize the experimental measurements and the interpretations of a possible excess in terms of new physics. We also review other top quark properties-emphasizing effects related to the ttˉt \bar t asymmetries-as well as other collider signals.Comment: RevTeX 40 pages. Final version to be published in Reviews of Modern Physics, with several addition

    First ADS analysis of B- -> D0K- decays in hadron collisions

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    Proceedings of DISCRETE 2010, Symposium on Prospects in the Physics of Discrete Symmetries, Rome (IT), 6-11 December 2010Comment: 7 pages, 5 figure

    Measurement of the production and differential cross sections of W+W- bosons in association with jets in pp¯ collisions at √s = 1.96TeV

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    This work was supported by the U.S. Department of Energy and National Science Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Natural Sciences and Engineering Research Council of Canada; the National Science Council of the Republic of China; the Swiss National Science Foundation; the A. P. Sloan Foundation; the Bundesministerium für Bildung und Forschung, Germany; the Korean World Class University Program, the National Research Foundation of Korea; the Science and Technology Facilities Council and the Royal Society, United Kingdom; the Russian Foundation for Basic Research; the Ministerio de Ciencia e Innovación, and Programa Consolider-Ingenio 2010, Spain; the Slovak R&D Agency; the Academy of Finland; the Australian Research Council (ARC); and the EU community Marie Curie Fellowship Grant No. 302103Aaltonen, T., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Appel, J.A., Arisawa, T., Artikov, A., Asaadi, J., Ashmanskas, W., Auerbach, B., Aurisano, A., Azfar, F., Badgett, W., Bae, T., Barbaro-Galtieri, A., Barnes, V.E., Barnett, B.A., Barria, P., Bartos, P., Bauce, M., Bedeschi, F., Behari, S., Bellettini, G., Bellinger, J., Benjamin, D., Beretvas, A., Bhatti, A., Bland, K.R., Blumenfeld, B., Bocci, A., Bodek, A., Bortoletto, D., Boudreau, J., Boveia, A., Brigliadori, L., Bromberg, C., Brucken, E., Budagov, J., Budd, H.S., Burkett, K., Busetto, G., Bussey, P., Butti, P., Buzatu, A., Calamba, A., Camarda, S., Campanelli, M., Canelli, F., Carls, B., Carlsmith, D., Carosi, R., Carrillo, S., Casal, B., Casarsa, M., Castro, A., Catastini, P., Cauz, D., Cavaliere, V., Cerri, A., Cerrito, L., Chen, Y.C., Chertok, M., Chiarelli, G., Chlachidze, G., Cho, K., Chokheli, D., Clark, A., Clarke, C., Convery, M.E., Conway, J., Corbo, M., Cordelli, M., Cox, C.A., Cox, D.J., Cremonesi, M., Cruz, D., Cuevas, J., Culbertson, R., D'Ascenzo, N., Datta, M., De Barbaro, P., Demortier, L., Deninno, M., D'Errico, M., Devoto, F., Di Canto, A., Di Ruzza, B., Dittmann, J.R., Donati, S., D'Onofrio, M., Dorigo, M., Driutti, A., Ebina, K., Edgar, R., Elagin, A., Erbacher, R., Errede, S., Esham, B., Farrington, S., Fernández Ramos, J.P., Field, R., Flanagan, G., Forrest, R., Franklin, M., Freeman, J.C., Frisch, H., Funakoshi, Y., Galloni, C., Garfinkel, A.F., Garosi, P., Gerberich, H., Gerchtein, E., Giagu, S., Giakoumopoulou, V., Gibson, K., Ginsburg, C.M., Giokaris, N., Giromini, P., Glagolev, V., Glenzinski, D., Gold, M., Goldin, D., Golossanov, A., Gomez, G., Gomez-Ceballos, G., Goncharov, M., González López, O., Gorelov, I., Goshaw, A.T., Goulianos, K., Gramellini, E., Grosso-Pilcher, C., Group, R.C., Guimaraes Da Costa, J., Hahn, S.R., Han, J.Y., Happacher, F., Hara, K., Hare, M., Harr, R.F., Harrington-Taber, T., Hatakeyama, K., Hays, C., Heinrich, J., Herndon, M., Hocker, A., Hong, Z., Hopkins, W., Hou, S., Hughes, R.E., Husemann, U., Hussein, M., Huston, J., Introzzi, G., Iori, M., Ivanov, A., James, E., Jang, D., Jayatilaka, B., Jeon, E.J., Jindariani, S., Jones, M., Joo, K.K., Jun, S.Y., Junk, T.R., Kambeitz, M., Kamon, T., Karchin, P.E., Kasmi, A., Kato, Y., Ketchum, W., Keung, J., Kilminster, B., Kim, D.H., Kim, H.S., Kim, J.E., Kim, M.J., Kim, S.H., Kim, S.B., Kim, Y.J., Kim, Y.K., Kimura, N., Kirby, M., Knoepfel, K., Kondo, K., Kong, D.J., Konigsberg, J., Kotwal, A.V., Kreps, M., Kroll, J., Kruse, M., Kuhr, T., Kurata, M., Laasanen, A.T., Lammel, S., Lancaster, M., Lannon, K., Latino, G., Lee, H.S., Lee, J.S., Leo, S., Leone, S., Lewis, J.D., Limosani, A., Lipeles, E., Lister, A., Liu, H., Liu, Q., Liu, T., Lockwitz, S., Loginov, A., Lucchesi, D., Lucà, A., Lueck, J., Lujan, P., Lukens, P., Lungu, G., Lys, J., Lysak, R., Madrak, R., Maestro, P., Malik, S., Manca, G., Manousakis-Katsikakis, A., Marchese, L., Margaroli, F., Marino, P., Matera, K., Mattson, M.E., Mazzacane, A., Mazzanti, P., McNulty, R., Mehta, A., Mehtala, P., Mesropian, C., Miao, T., Mietlicki, D., Mitra, A., Miyake, H., Moed, S., Moggi, N., Moon, C.S., Moore, R., Morello, M.J., Mukherjee, A., Muller, Th., Murat, P., Mussini, M., Nachtman, J., Nagai, Y., Naganoma, J., Nakano, I., Napier, A., Nett, J., Neu, C., Nigmanov, T., Nodulman, L., Noh, S.Y., Norniella, O., Oakes, L., Oh, S.H., Oh, Y.D., Oksuzian, I., Okusawa, T., Orava, R., Ortolan, L., Pagliarone, C., Palencia, E., Palni, P., Papadimitriou, V., Parker, W., Pauletta, G., Paulini, M., Paus, C., Phillips, T.J., Piacentino, G., Pianori, E., Pilot, J., Pitts, K., Plager, C., Pondrom, L., Poprocki, S., Potamianos, K., Pranko, A., Prokoshin, F., Ptohos, F., Punzi, G., Redondo Fernández, I., Renton, P., Rescigno, M., Rimondi, F., Ristori, L., Robson, A., Rodriguez, T., Rolli, S., Ronzani, M., Roser, R., Rosner, J.L., Ruffini, F., Ruiz, A., Russ, J., Rusu, V., Sakumoto, W.K., Sakurai, Y., Santi, L., Sato, K., Saveliev, V., Savoy-Navarro, A., Schlabach, P., Schmidt, E.E., Schwarz, T., Scodellaro, L., Scuri, F., Seidel, S., Seiya, Y., Semenov, A., Sforza, F., Shalhout, S.Z., Shears, T., Shepard, P.F., Shimojima, M., Shochet, M., Shreyber-Tecker, I., Simonenko, A., Sliwa, K., Smith, J.R., Snider, F.D., Song, H., Sorin, V., St. Denis, R., Stancari, M., Stentz, D., Strologas, J., Sudo, Y., Sukhanov, A., Suslov, I., Takemasa, K., Takeuchi, Y., Tang, J., Tecchio, M., Teng, P.K., Thom, J., Thomson, E., Thukral, V., Toback, D., Tokar, S., Tollefson, K., Tomura, T., Tonelli, D., Torre, S., Torretta, D., Totaro, P., Trovato, M., Ukegawa, F., Uozumi, S., Vázquez, F., Velev, G., Vellidis, C., Vernieri, C., Vidal, M., Vilar, R., Vizán, J., Vogel, M., Volpi, G., Wagner, P., Wallny, R., Wang, S.M., Waters, D., Wester, W.C., III, Whiteson, D., Wicklund, A.B., Wilbur, S., Williams, H.H., Wilson, J.S., Wilson, P., Winer, B.L., Wittich, P., Wolbers, S., Wolfe, H., Wright, T., Wu, X., Wu, Z., Yamamoto, K., Yamato, D., Yang, T., Yang, U.K., Yang, Y.C., Yao, W.-M., Yeh, G.P., Yi, K., Yoh, J., Yorita, K., Yoshida, T., Yu, G.B., Yu, I., Zanetti, A.M., Zeng, Y., Zhou, C., Zucchelli, S

    Measurement of radioactive contamination in the high-resistivity silicon CCDs of the DAMIC experiment

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    We present measurements of radioactive contamination in the high-resistivity silicon charge-coupled devices (CCDs) used by the DAMIC experiment to search for dark matter particles. Novel analysis methods, which exploit the unique spatial resolution of CCDs, were developed to identify α\alpha and β\beta particles. Uranium and thorium contamination in the CCD bulk was measured through α\alpha spectroscopy, with an upper limit on the 238^{238}U (232^{232}Th) decay rate of 5 (15) kg1^{-1} d1^{-1} at 95% CL. We also searched for pairs of spatially correlated electron tracks separated in time by up to tens of days, as expected from 32^{32}Si-32^{32}P or 210^{210}Pb-210^{210}Bi sequences of β\beta decays. The decay rate of 32^{32}Si was found to be 8065+11080^{+110}_{-65} kg1^{-1} d1^{-1} (95% CI). An upper limit of \sim35 kg1^{-1} d1^{-1} (95% CL) on the 210^{210}Pb decay rate was obtained independently by α\alpha spectroscopy and the β\beta decay sequence search. These levels of radioactive contamination are sufficiently low for the successful operation of CCDs in the forthcoming 100 g DAMIC detector.Comment: 18 pages, 20 figure

    Single Top Quark Production as a Probe for Anomalous Moments at Hadron Colliders

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    Single production of top quarks at hadron colliders via gWgW fusion is examined as a probe of possible anomalous chromomagnetic and/or chromoelectric moment type couplings between the top and gluons. We find that this channel is far less sensitive to the existence of anomalous couplings of this kind than is the usual production of top pairs by gggg or qqˉq\bar q fusion. This result is found to hold at both the Tevatron as well as the LHC although somewhat greater sensitivity for anomalous couplings in this channel is found at the higher energy machine.Comment: New discussion and 10 new figures added. uuencoded postscript fil
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