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First measurement of the ratio of branching fractions B(Λ0b→Λ+cμ−ν¯μ)/B(Λ0b→Λ+cπ−)

Aaltonen, T. et al. (2009) First measurement of the ratio of branching fractions B(Λ0b→Λ+cμ−ν¯μ)/B(Λ0b→Λ+cπ−). Physical Review D, 79(3), 032001. (doi:10.1103/PhysRevD.79.032001)

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Abstract

This article presents the first measurement of the ratio of branching fractions B(Λ0b→Λ+cμ−ν¯μ)/B(Λ0b→Λ+cπ−). Measurements in two control samples using the same technique B(B¯¯¯0→D+μ−ν¯μ)/B(B¯¯¯0→D+π−) and B(B¯¯¯0→D∗(2010)+μ−ν¯μ)/B(B¯¯¯0→D∗(2010)+π−) are also reported. The analysis uses data from an integrated luminosity of approximately 172  pb−1 of pp¯ collisions at s√=1.96  TeV, collected with the CDF II detector at the Fermilab Tevatron. The relative branching fractions are measured to be B(Λ0b→Λ+cμ−ν¯μ)B(Λ0b→Λ+cπ−)=16.6±3.0(stat)±1.0(syst)+2.6−3.4(PDG)±0.3(EBR), B(B¯¯¯0→D+μ−ν¯μ)B(B¯¯¯0→D+π−)=9.9±1.0(stat)±0.6(syst)±0.4(PDG)±0.5(EBR), and B(B¯¯¯0→D∗(2010)+μ−ν¯μ)B(B¯¯¯0→D∗(2010)+π−)=16.5±2.3(stat)±0.6(syst)±0.5(PDG)±0.8(EBR). The uncertainties are from statistics (stat), internal systematics (syst), world averages of measurements published by the Particle Data Group or subsidiary measurements in this analysis (PDG), and unmeasured branching fractions estimated from theory (EBR), respectively. This article also presents measurements of the branching fractions of four new Λ0b semileptonic decays: Λ0b→Λc(2595)+μ−ν¯μ, Λ0b→Λc(2625)+μ−ν¯μ, Λ0b→Σc(2455)0π+μ−ν¯μ, and Λ0b→Σc(2455)++π−μ−ν¯μ, relative to the branching fraction of the Λ0b→Λ+cμ−ν¯μ decay. Finally, the transverse-momentum distribution of Λ0b baryons produced in pp¯ collisions is measured and found to be significantly different from that of B¯¯¯0 mesons, which results in a modification in the production cross-section ratio σΛ0b/σB¯¯¯0 with respect to the CDF I measurement.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:St Denis, Dr Richard and Thompson, Dr Alan and Robson, Dr Aidan and Bussey, Dr Peter
Authors: Aaltonen, T., Adelman, J., Akimoto, T., Albrow, M., Gonzalez, B., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Apresyan, A., Arisawa, T., Artikov, A., Ashmanskas, W., Attal, A., Aurisano, A., Azfar, F., Azzurri, P., Badgett, W., Barbaro-Galtieri, A., Barnes, V., Barnett, B., Bartsch, V., Bauer, G., Beauchemin, P., Bedeschi, F., Beecher, D., Behari, S., Bellettini, G., Bellinger, J., Benjamin, D., Beretvas, A., Beringer, J., Bhatti, A., Binkley, M., Bisello, D., Bizjak, I., Blair, R., Blocker, C., Blumenfeld, B., Bocci, A., Bodek, A., Boisvert, V., Bolla, G., Bortoletto, D., Boudreau, J., Boveia, A., Brau, B., Bridgeman, A., Brigliadori, L., Bromberg, C., Brubaker, E., Budagov, J., Budd, H., Budd, S., Burke, S., Burkett, K., Busetto, G., Bussey, P., Buzatu, A., Byrum, K., Cabrera, S., Calancha, C., 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., Choudalakis, G., Chuang, S., Chung, K., Chung, W., Chung, Y., Chwalek, T., Ciobanu, C., Ciocci, M., Clark, A., Clark, D., Compostella, G., Convery, M., Conway, J., Cordelli, M., Cortiana, G., Cox, C., Cox, D., Crescioli, F., Almenar, C., Cuevas, J., Culbertson, R., Cully, J., Dagenhart, D., 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., Derwent, P., di Giovanni, G., Dionisi, C., Di Ruzza, B., Dittmann, J., D'Onofrio, M., Donati, S., Dong, P., Donini, J., Dorigo, T., Dube, S., Efron, J., Elagin, A., Erbacher, R., Errede, D., Errede, S., 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., Genser, K., 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., Gonzalez, O., Gorelov, I., Goshaw, A., Goulianos, K., Gresele, A., Grinstein, S., Grosso-Pilcher, C., Group, R., Grundler, U., da Costa, J., Gunay-Unalan, Z., Haber, C., Hahn, K., Hahn, S., Halkiadakis, E., Han, B., Han, J., Happacher, F., Hara, K., Hare, D., Hare, M., Harper, S., Harr, R., Harris, R., Hartz, M., Hatakeyama, K., Hays, C., Heck, M., Heijboer, A., Heinrich, J., Henderson, C., Herndon, M., Heuser, J., Hewamanage, S., Hidas, D., Hill, C., Hirschbuehl, D., Hocker, A., Hou, S., Houlden, M., Hsu, S., Huffman, B., Hughes, R., Husemann, U., Hussein, M., Husemann, U., Huston, J., Incandela, J., Introzzi, G., Iori, M., Ivanov, A., James, E., 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., 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., Knuteson, B., Ko, B., Kondo, K., Kong, D., Konigsberg, J., Korytov, A., Kotwal, A., Kreps, M., Kroll, J., Krop, D., Krumnack, N., Kruse, M., Krutelyov, V., Kubo, T., Kuhr, T., Kulkarni, N., Kurata, M., Kusakabe, Y., 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, S., Leone, S., Lewis, J., Lin, C., Linacre, J., Lindgren, M., Lipeles, E., Lister, A., Litvintsev, D., Liu, C., Liu, T., Lockyer, N., Loginov, A., Loreti, M., Lovas, L., Lucchesi, D., Luci, C., Lueck, J., Lujan, P., Lukens, P., Lungu, G., Lyons, L., Lys, J., Lysak, R., MacQueen, D., Madrak, R., Maeshima, K., Makhoul, K., Maki, T., Maksimovic, P., Malde, S., Malik, S., Manca, G., Manousakis-Katsikakis, A., Margaroli, F., Marino, C., Marino, C., Martin, A., Martin, V., Martinez, M., Martinez-Ballarin, R., Maruyama, T., Mastrandrea, P., Masubuchi, T., Mathis, M., Mattson, M., Mazzanti, P., McFarland, K., McIntyre, P., McNulty, R., Mehta, A., Mehtala, P., Menzione, A., Merkel, P., Mesropian, C., Miao, T., Miladinovic, N., Miller, R., Mills, C., Milnik, M., Mitra, A., Mitselmakher, G., Miyake, H., Moggi, N., Moon, C., Moore, R., Morello, M., Morlok, J., Movilla Fernandez, P., Mulmenstadt, J., Mukherjee, A., Muller, T., Mumford, R., Murat, P., Mussini, M., Nachtman, J., Nagai, Y., Nagano, A., Naganoma, J., Nakamura, K., Nakano, I., Napier, A., Necula, V., 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., Griso, S., Palencia, E., Papadimitriou, V., Papaikonomou, A., Paramonov, 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., Poukhov, O., Pounder, N., Prakoshyn, F., Pronko, A., Proudfoot, J., 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., Safonov, A., Sakumoto, W., Salto, O., Santi, L., Sarkar, S., Sartori, L., Sato, K., 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., Sidoti, A., Sinervo, P., Sisakyan, A., Slaughter, A., Slaunwhite, J., Sliwa, K., Smith, J., Snider, F., Snihur, R., Soha, A., Somalwar, S., Sorin, V., Spalding, J., Spreitzer, T., Squillacioti, P., Stanitzki, M., St Denis, R., Stelzer, B., Stelzer-Chilton, O., Stentz, D., Strologas, J., Strycker, G., Stuart, D., Suh, J., Sukhanov, A., Suslov, I., Suzuki, T., Taffard, A., Takashima, R., Takeuchi, Y., Tanaka, R., Tecchio, M., Teng, P., Terashi, K., Tesarek, R., Thom, J., Thompson, A.S., Thompson, G., Thomson, E., Tipton, P., Ttito-Guzman, P., Tkaczyk, S., Toback, D., Tokar, S., Tollefson, K., Tomura, T., Tonelli, D., Torre, S., Torretta, D., Totaro, P., Tourneur, S., Trovato, M., Tsai, S., Tu, Y., Turini, N., Ukegawa, F., Vallecorsa, S., van Remortel, N., Varganov, A., Vataga, E., Vazquez, F., Velev, G., Vellidis, C., Veszpremi, V., Vidal, M., Vidal, R., Vila, I., Vilar, R., Vine, T., 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., Wright, T., Wu, X., Wurthwein, F., Wynne, S., Xie, S., Yagil, A., Yamamoto, K., Yamaoka, J., Yang, U., Yang, Y., Yao, W., Yeh, G., Yoh, J., Yorita, K., Yoshida, T., Yu, G., Yu, I., Yu, S., Yun, J., Zanello, L., Zanetti, A., 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
Published Online:6 February 2009

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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