Mass and lifetime measurements of bottom and charm baryons in p p ̄ collisions at s =1.96TeV MASS and LIFETIME MEASUREMENTS of BOTTOM and ⋯ T. AALTONEN

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Journal Article

We report on mass and lifetime measurements of several ground state charmed and bottom baryons, using a data sample corresponding to 9.6fb-1 from pp̄ collisions at s=1.96TeV and recorded with the Collider Detector at Fermilab. Baryon candidates are reconstructed from data collected with an online event selection designed for the collection of long-lifetime heavy-flavor decay products and a second event selection designed to collect J/ ψ→μ+μ- candidates. First evidence for the process Ωb-→Ωc0π- is presented with a significance of 3.3σ. We measure the following baryon masses: M(Ξc0)=2470.85±0.24(stat) ±0.55(syst)MeV/c2,M(Ξc+)=2468.00±0.18(stat)±0.51(syst) MeV/c2,M(Λb)=5620.15±0.31(stat)±0.47(syst)MeV/c2,M(Ξb-)= 5793.4±1.8(stat)±0.7(syst)MeV/c2,M(Ξb0)=5788.7±4.3(stat) ±1.4(syst)MeV/c2,andM(Ωb-)=6047.5±3.8(stat)±0.6(syst) MeV/c2.The isospin splitting of the Ξb-,0 states is found to be M(Ξb-)-M(Ξb0)=4.7±4.7(stat)±0.7(syst)MeV/c2. The isospin splitting of the Ξc0,+ states is found to be M(Ξc0)-M(Ξc+)=2. 85±0.30(stat)±0.04(syst)MeV/c2. The following lifetime measurements are made: τ(Λb)=1.565±0.035(stat)±0. 020(syst)ps,τ(Ξb-)=1.32±0.14(stat)±0.02(syst)ps, τ(Ωb-)=1.66-0.40+0.53(stat)±0.02(syst)ps. © 2014 American Physical Society.

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Duke Authors

Cited Authors

  • Aaltonen, T; Amerio, S; Amidei, D; Anastassov, A; Annovi, A; Antos, J; Apollinari, G; Appel, JA; Arisawa, T; Artikov, A; Asaadi, J; Ashmanskas, W; Auerbach, B; Aurisano, A; Azfar, F; Badgett, W; Bae, T; Barbaro-Galtieri, A; Barnes, VE; Barnett, BA; Barria, P; Bartos, P; Bauce, M; Bedeschi, F; Behari, S; Bellettini, G; Bellinger, J; Benjamin, D; Beretvas, A; Bhatti, A; Bland, KR; Blumenfeld, B; Bocci, A; Bodek, A; Bortoletto, D; Boudreau, J; Boveia, A; Brigliadori, L; Bromberg, C; Brucken, E; Budagov, J; Budd, HS; 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; Cavalli-Sforza, M; Cerri, A; Cerrito, L; Chen, YC; Chertok, M; Chiarelli, G; Chlachidze, G; Cho, K; Chokheli, D; Clark, A; Clarke, C; Convery, ME; Conway, J; Corbo, M; Cordelli, M; Cox, CA; Cox, DJ; 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, JR; Donati, S; D'Onofrio, M; Dorigo, M; Driutti, A; Ebina, K; Edgar, R; Elagin, A; Erbacher, R

Published Date

  • April 22, 2014

Published In

Volume / Issue

  • 89 / 7

Electronic International Standard Serial Number (EISSN)

  • 1550-2368

International Standard Serial Number (ISSN)

  • 1550-7998

Digital Object Identifier (DOI)

  • 10.1103/PhysRevD.89.072014

Citation Source

  • Scopus