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Observation of single top quark production and measurement of |Vtb| with CDF

Aaltonen, T. et al. (2010) Observation of single top quark production and measurement of |Vtb| with CDF. Physical Review D, 82 (11). ISSN 1550-7998 (doi:10.1103/PhysRevD.82.112005)

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Publisher's URL: http://dx.doi.org/10.1103/PhysRevD.82.112005

Abstract

We report the observation of electroweak single top quark production in 3.2  fb-1 of pp̅ collision data collected by the Collider Detector at Fermilab at √s=1.96  TeV. Candidate events in the W+jets topology with a leptonically decaying W boson are classified as signal-like by four parallel analyses based on likelihood functions, matrix elements, neural networks, and boosted decision trees. These results are combined using a super discriminant analysis based on genetically evolved neural networks in order to improve the sensitivity. This combined result is further combined with that of a search for a single top quark signal in an orthogonal sample of events with missing transverse energy plus jets and no charged lepton. We observe a signal consistent with the standard model prediction but inconsistent with the background-only model by 5.0 standard deviations, with a median expected sensitivity in excess of 5.9 standard deviations. We measure a production cross section of 2.3-0.5+0.6(stat+sys)  pb, extract the value of the Cabibbo-Kobayashi-Maskawa matrix element |Vtb|=0.91-0.11+0.11(stat+sys)±0.07  (theory), and set a lower limit |Vtb|>0.71 at the 95% C.L., assuming mt=175  GeV/c2.

Item Type:Article
Status:Published
Refereed:Yes
Glasgow Author(s):Robson, Dr Aidan and St Denis, Dr Richard and Bussey, Dr Peter
Authors: Aaltonen, T., Adelman, J., Álvarez González, B., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Appel, J., Apresyan, A., Arisawa, T., Artikov, A., Asaadi, J., Ashmanskas, W., Attal, A., Aurisano, A., Azfar, F., Badgett, W., Barbaro-Galtieri, A., Barnes, V., Barnett, B., Barria, P., Bartos, P., Bauer, G., Beauchemin, P.-H., Bedeschi, F., Beecher, D., Behari, S., Bellettini, G., Bellinger, J., Benjamin, D., Beretvas, A., Bhatti, A., Binkley, M., Bisello, D., Bizjak, I., Blair, R., Blocker, C., Blumenfeld, B., Bocci, A., Bodek, A., Boisvert, V., Bortoletto, D., Boudreau, J., Boveia, A., Brau, B., Bridgeman, A., Brigliadori, L., Bromberg, C., Brubaker, E., Budagov, J., Budd, H., Budd, S., Burkett, K., Busetto, G., Bussey, P., Buzatu, A., Byrum, K., Cabrera, S., Calancha, C., Camarda, S., Campanelli, M., Campbell, M., Canelli, F., Canepa, A., Carls, B., Carlsmith, D., Carosi, R., Carrillo, S., Carron, S., Casal, B., Casarsa, M., Castro, A., Catastini, P., Cauz, D., Cavaliere, V., Cavalli-Sforza, M., Cerri, A., Cerrito, L., Chang, S., Chen, Y., Chertok, M., Chiarelli, G., Chlachidze, G., Chlebana, F., Cho, K., Chokheli, D., Chou, J., Chung, K., Chung, W., Chung, Y., Chwalek, T., Ciobanu, C., Ciocci, M., Clark, A., Clark, D., Compostella, G., Convery, M., Conway, J., Corbo, M., Cordelli, M., Cox, C., Cox, D., Crescioli, F., Cuenca Almenar, C., Cuevas, J., Culbertson, R., Cully, J., Dagenhart, D., d’Ascenzo, N., Datta, M., Davies, T., de Barbaro, P., De Cecco, S., Deisher, A., De Lorenzo, G., Dell’Orso, M., Deluca, C., Demortier, L., Deng, J., Deninno, M., d’Errico, M., Di Canto, A., Di Ruzza, B., Dittmann, J., D’Onofrio, M., Donati, S., Dong, P., Dorigo, T., Dube, S., Ebina, K., Elagin, A., Erbacher, R., Errede, D., Errede, S., Ershaidat, N., Eusebi, R., Fang, H., Farrington, S., Fedorko, W., Feild, R., Feindt, M., Fernandez, J., Ferrazza, C., Field, R., Flanagan, G., Forrest, R., Frank, M., Franklin, M., Freeman, J., Furic, I., Gallinaro, M., Galyardt, J., Garberson, F., Garcia, J., Garfinkel, A., Garosi, P., Gerberich, H., Gerdes, D., Gessler, A., Giagu, S., Giakoumopoulou, V., Giannetti, P., Gibson, K., Gimmell, J., Ginsburg, C., Giokaris, N., Giordani, M., Giromini, P., Giunta, M., Giurgiu, G., Glagolev, V., Glenzinski, D., Gold, M., Goldschmidt, N., Golossanov, A., Gomez, G., Gomez-Ceballos, G., Goncharov, M., González, O., Gorelov, I., Goshaw, A., Goulianos, K., Gresele, A., Grinstein, S., Grosso-Pilcher, C., Group, R., Grundler, U., Guimaraes da Costa, J., Gunay-Unalan, Z., Haber, C., Hahn, S., Halkiadakis, E., Han, B.-Y., Han, J., Happacher, F., Hara, K., Hare, D., Hare, M., Harr, R., Hartz, M., Hatakeyama, K., Hays, C., Heck, M., Heinrich, J., Herndon, M., Heuser, J., Hewamanage, S., Hidas, D., Hill, C., Hirschbuehl, D., Hocker, A., Hou, S., Houlden, M., Hsu, S.-C., Hughes, R., Hurwitz, M., Husemann, U., Hussein, M., Huston, J., Incandela, J., Introzzi, G., Iori, M., Ivanov, A., James, E., Jang, D., Jayatilaka, B., Jeon, E., Jha, M., Jindariani, S., Johnson, W., Jones, M., Joo, K., Jun, S., Jung, J., Junk, T., Kamon, T., Kar, D., Karchin, P., Kato, Y., Kephart, R., Ketchum, W., Keung, J., Khotilovich, V., Kilminster, B., Kim, D., Kim, H., Kim, H., Kim, J., Kim, M., Kim, S., Kim, S., Kim, Y., Kimura, N., Kirsch, L., Klimenko, S., Kondo, K., Kong, D., Konigsberg, J., Korytov, A., Kotwal, A., Kreps, M., Kroll, J., Krop, D., Krumnack, N., Kruse, M., Krutelyov, V., Kuhr, T., Kulkarni, N., Kurata, M., Kwang, S., Laasanen, A., Lami, S., Lammel, S., Lancaster, M., Lander, R., Lannon, K., Lath, A., Latino, G., Lazzizzera, I., LeCompte, T., Lee, E., Lee, H., Lee, J., Lee, S., Leone, S., Lewis, J., Lin, C.-J., Linacre, J., Lindgren, M., Lipeles, E., Lister, A., Litvintsev, D., Liu, C., Liu, T., Lockyer, N., Loginov, A., Lovas, L., Lucchesi, D., Lueck, J., Lujan, P., Lukens, P., Lungu, G., Lys, J., Lysak, R., MacQueen, D., Madrak, R., Maeshima, K., Makhoul, K., Maksimovic, P., Malde, S., Malik, S., Manca, G., Manousakis-Katsikakis, A., Margaroli, F., Marino, C., Marino, C., Martin, A., Martin, V., Martínez, M., Martínez-Ballarín, R., Mastrandrea, P., Mathis, M., Mattson, M., Mazzanti, P., McFarland, K., McIntyre, P., McNulty, R., Mehta, A., Mehtala, P., Menzione, A., Mesropian, C., Miao, T., Mietlicki, D., Miladinovic, N., Miller, R., Mills, C., Milnik, M., Mitra, A., Mitselmakher, G., Miyake, H., Moed, S., Moggi, N., Mondragon, M., Moon, C., Moore, R., Morello, M., Morlock, J., Movilla Fernandez, P., Mülmenstädt, J., Mukherjee, A., Muller, Th., Murat, P., Mussini, M., Nachtman, J., Nagai, Y., Naganoma, J., Nakamura, K., Nakano, I., Napier, A., Nett, J., Neu, C., Neubauer, M., Neubauer, S., Nielsen, J., Nodulman, L., Norman, M., Norniella, O., Nurse, E., Oakes, L., Oh, S., Oh, Y., Oksuzian, I., Okusawa, T., Orava, R., Osterberg, K., Pagan Griso, S., Pagliarone, C., Palencia, E., Papadimitriou, V., Papaikonomou, A., Paramanov, A., Parks, B., Pashapour, S., Patrick, J., Pauletta, G., Paulini, M., Paus, C., Peiffer, T., Pellett, D., Penzo, A., Phillips, T., Piacentino, G., Pianori, E., Pinera, L., Pitts, K., Plager, C., Pondrom, L., Potamianos, K., Poukhov, O., Prokoshin, F., Pronko, A., Ptohos, F., Pueschel, E., Punzi, G., Pursley, J., Rademacker, J., Rahaman, A., Ramakrishnan, V., Ranjan, N., Redondo, I., Renton, P., Renz, M., Rescigno, M., Richter, S., Rimondi, F., Ristori, L., Robson, A., Rodrigo, T., Rodriguez, T., Rogers, E., Rolli, S., Roser, R., Rossi, M., Rossin, R., Roy, P., Ruiz, A., Russ, J., Rusu, V., Rutherford, B., Saarikko, H., Safonov, A., Sakumoto, W., Santi, L., Sartori, L., Sato, K., Saveliev, V., Savoy-Navarro, A., Schlabach, P., Schmidt, A., Schmidt, E., Schmidt, M., Schmidt, M., Schmitt, M., Schwarz, T., Scodellaro, L., Scribano, A., Scuri, F., Sedov, A., Seidel, S., Seiya, Y., Semenov, A., Sexton-Kennedy, L., Sforza, F., Sfyrla, A., Shalhout, S., Shears, T., Shepard, P., Shimojima, M., Shiraishi, S., Shochet, M., Shon, Y., Shreyber, I., Simonenko, A., Sinervo, P., Sisakyan, A., Slaughter, A., Slaunwhite, J., Sliwa, K., Smith, J., Snider, F., Snihur, R., Soha, A., Somalwar, S., Sorin, V., Squillacioti, P., Stanitzki, M., St Denis, R., Stelzer, B., Stelzer-Chilton, O., Stentz, D., Strologas, J., Strycker, G., Suh, J., Sukhanov, A., Suslov, I., Taffard, A., Takashima, R., Takeuchi, Y., Tanaka, R., Tang, J., Tecchio, M., Teng, P., Thom, J., Thome, J., Thompson, G., Thomson, E., Tipton, P., Ttito-Guzmán, P., Tkaczyk, S., Toback, D., Tokar, S., Tollefson, K., Tomura, T., Tonelli, D., Torre, S., Torretta, D., Totaro, P., Trovato, M., Tsai, S.-Y., Tu, Y., Turini, N., Ukegawa, F., Uozumi, S., van Remortel, N., Varganov, A., Vataga, E., Vázquez, F., Velev, G., Vellidis, C., Vidal, M., Vila, I., Vilar, R., Vogel, M., Volobouev, I., Volpi, G., Wagner, P., Wagner, R., Wagner, R., Wagner, W., Wagner-Kuhr, J., Wakisaka, T., Wallny, R., Wang, S., Warburton, A., Waters, D., Weinberger, M., Weinelt, J., Wester, W., Whitehouse, B., Whiteson, D., Wicklund, A., Wicklund, E., Wilbur, S., Williams, G., Williams, H., Wilson, P., Winer, B., Wittich, P., Wolbers, S., Wolfe, C., Wolfe, H., Wright, T., Wu, X., Würthwein, F., Yagil, A., Yamamoto, K., Yamaoka, J., Yang, U., Yang, Y., Yao, W., Yeh, G., Yi, K., Yoh, J., Yorita, K., Yoshida, T., Yu, G., Yu, I., Yu, S., Yun, J., Zanetti, A., Zeng, Y., Zhang, X., Zheng, Y., and Zucchelli, S.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Publisher:American Physical Society
ISSN:1550-7998
ISSN (Online):1089-4918

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
395963Experimental Particle PhysicsAnthony DoyleScience & Technologies Facilities Council (STFC)ST/H001077/1Physics and Astronomy