Measurements of the B+, B0, meson and baryon lifetimes

• Published in: The journal of high energy physics Vol. 2014; no. 4
• Main Authors: Ajaltouni, Z., Alkhazov, G., Anderlini, L., Artamonov, A., Artuso, M., Barlow, R. J., Bedeschi, F., Benson, S., Bjørnstad, P. M., Blake, T., Blusk, S., Bursche, A., Akiba, K. Carvalho, Chiapolini, N., Ciba, K., Vidal, X. Cid, Ciezarek, G., Cogan, J., Counts, I., De Cian, M., De Paula, L., De Simone, P., Donleavy, S., Dzyuba, A., Rodrigues, F. Ferreira, Fitzpatrick, C., Frank, M., Frosini, M., Furfaro, E., Gershon, T., Gianelle, A., Gomes, A., Graugés, E., Greening, E., Gys, T., Haefeli, G., Morata, J. A. Hernando, van Herwijnen, E., Hill, D., Hutchcroft, D., John, M., Karacson, M., Komarov, I., Kreplin, K., Kruse, F., Kudryavtsev, V., Lambert, D., Lambert, R. W., Longstaff, I., Malde, S., Manca, G., Marks, J., Mathe, Z., Matteuzzi, C., Meier, F., Morello, M. J., Nandakumar, R., Needham, M., Nguyen, A. D., Nikitin, N., Obraztsov, V., Orlandea, M., Goicochea, J. M. Otalora, Palutan, M., Penso, G., Altarelli, M. Pepe, Perrin-Terrin, M., Pistone, A., Powell, A., Prisciandaro, J., Raven, G., Rodrigues, E., Romanovsky, V., Sabatino, G., Silva, J. J. Saborido, Guimaraes, V. Salustino, Sedes, B. Sanmartin, Satta, A., Schmelling, M., Schune, M.-H., Sciascia, B., Sciubba, A., Senderowska, K., Skidmore, N., Smith, E., Soler, F. J. P., Spaan, B., Steinkamp, O., Stoica, S., Straumann, U., Stroili, R., Szilard, D., Tran, M. T., Tsaregorodtsev, A., Tuning, N., Sierra, C. Vázquez, Vorobyev, V., Ward, D. R., Watson, N. K., Zhang, Y.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 16.04.2014
• Subjects: Classical and Quantum Gravitation; Elementary Particles; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Relativity Theory; String Theory; Lifetime; B physics; Flavor physics; Hadron-Hadron Scattering
• ISSN: 1029-8479
• DOI: 10.1007/JHEP04(2014)114

A bstract Measurements of b -hadron lifetimes are reported using pp collision data, corresponding to an integrated luminosity of 1.0 fb −1 , collected by the LHCb detector at a centre-of-mass energy of 7 TeV. Using the exclusive decays B + → J/ ψ K + , B 0 → J/ ψ K ∗ (892) 0 , , and the average decay times in these modes are measured to be where the first uncertainty is statistical and the second is systematic. These represent the most precise lifetime measurements in these decay modes. In addition, ratios of these lifetimes, and the ratio of the decay-width difference, ΔΓ d , to the average width, Γ d , in the B 0 system, ΔΓ d / Γ d = −0 . 044 ± 0 . 025 ± 0 . 011, are reported. All quantities are found to be consistent with Standard Model expectations.