Measurement of the Ξb− and Ωb− baryon lifetimes

Using a data sample of pp collisions corresponding to an integrated luminosity of 3 fb−1, the Ξb− and Ωb− baryons are reconstructed in the Ξb−→J/ψΞ− and Ωb−→J/ψΩ− decay modes and their lifetimes measured to beτ(Ξb−)=1.55−0.09+0.10 (stat)±0.03 (syst) ps,τ(Ωb−)=1.54−0.21+0.26 (stat)±0.05 (syst) ps. Th...

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Veröffentlicht in:	Physics letters. B 2014-09, Vol.736 (C), p.154-162
Hauptverfasser:	Ajaltouni, Z., An, L., Andreotti, M., Artamonov, A., Bencivenni, G., van Beuzekom, M., Blouw, J., Britsch, M., Britton, T., Cardinale, R., Charles, M., Cogan, J., Contu, A., Coquereau, S., Corti, G., Craik, D.C., De Capua, S., De Cian, M., De Paula, L., Di Canto, A., Donleavy, S., Dziurda, A., Färber, C., Farinelli, C., Ferguson, D., Fontanelli, F., Fu, J., Gauld, R., Ghez, Ph, Giubega, L., Gotti, C., Graciani Diaz, R., Gushchin, E., Henrard, P., Hernando Morata, J.A., Hombach, C., Jones, C.R., Joram, C., Kandybei, S., Khurewathanakul, C., Kolpin, M., Koppenburg, P., Kreps, M., Krokovny, P., Kruse, F., Langhans, B., Le Gac, R., Linn, C., Liu, G., Marks, J., Martins Tostes, D., Matteuzzi, C., Minard, M.-N., Mordà, A., Muster, B., Nakada, T., Neri, N., Nguyen, A.D., Obraztsov, V., Oyanguren, A., Pal, B.K., Palombo, F., Parkes, C., Patel, G.D., Petridis, K., Pinci, D., Pistone, A., Popov, D., Potterat, C., Rademacker, J.H., Raven, G., Reid, M.M., Ricciardi, S., Rodrigues, E., Rodriguez Perez, P., Santamarina Rios, C., Satriano, C., Savrie, M., Silva Coutinho, R., Simi, G., Sirendi, M., Skidmore, N., Stone, S., Storaci, B., Swientek, K., Thomas, E., Tisserand, V., Tsopelas, P., Vagnoni, V., Vazquez Gomez, R., Velthuis, J.J., Vieira, D., Voß, C., Voss, H., de Vries, J.A., Wallace, C., Wishahi, J., Wislicki, W., Wright, S., Yushchenko, O.
Format:	Artikel
Sprache:	eng
Schlagworte:	High Energy Physics - Experiment Physics PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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Beschreibung
Zusammenfassung:	Using a data sample of pp collisions corresponding to an integrated luminosity of 3 fb−1, the Ξb− and Ωb− baryons are reconstructed in the Ξb−→J/ψΞ− and Ωb−→J/ψΩ− decay modes and their lifetimes measured to beτ(Ξb−)=1.55−0.09+0.10 (stat)±0.03 (syst) ps,τ(Ωb−)=1.54−0.21+0.26 (stat)±0.05 (syst) ps. These are the most precise determinations to date. Both measurements are in good agreement with previous experimental results and with theoretical predictions.
ISSN:	0370-2693 1873-2445
DOI:	10.1016/j.physletb.2014.06.064