| dc.contributor.author | Aaltonen, Timo Antero | |
| dc.contributor.author | Casal Laraña, Bruno | |
| dc.contributor.author | Cuevas Maestro, Francisco Javier | |
| dc.contributor.author | Gómez Gramuglio, Gervasio | |
| dc.contributor.author | Palencia Cortezón, José Enrique | |
| dc.contributor.author | Ruiz Jimeno, Alberto | |
| dc.contributor.author | Scodellaro, Luca | |
| dc.contributor.author | Vilar Cortabitarte, Rocío | |
| dc.contributor.author | Vizán García, Jesús Manuel | |
| dc.contributor.other | Universidad de Cantabria | es_ES |
| dc.date.accessioned | 2018-06-15T06:48:47Z | |
| dc.date.available | 2018-06-15T06:48:47Z | |
| dc.date.issued | 2014-04 | |
| dc.identifier.issn | 1550-7998 | |
| dc.identifier.issn | 1550-2368 | |
| dc.identifier.other | FPA2014-55295-C3-1-R | |
| dc.identifier.other | FPA 2011-28694-C02-01 | |
| dc.identifier.uri | http://hdl.handle.net/10902/13901 | |
| dc.description.abstract | We report on mass and lifetime measurements of several ground state charmed and bottom baryons, using a data sample corresponding to 9.6 fb−1 from p¯p collisions at √s=1.96 TeV 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 Ω−b→Ω0cπ− is presented with a significance of 3.3σ . We measure the following baryon masses:
M(Ξ0c)=2470.85±0.24(stat)±0.55(syst) MeV/c2,
M(Ξ+c)=2468.00±0.18(stat)±0.51(syst) MeV/c2,
M(Λb)=5620.15±0.31(stat)±0.47(syst) MeV/c2,
M(Ξ−b)=5793.4±1.8(stat)±0.7(syst) MeV/c2,
M(Ξ0b)=5788.7±4.3(stat)±1.4(syst) MeV/c2, and
M(Ω−b)=6047.5±3.8(stat)±0.6(syst) MeV/c2.
The isospin splitting of the Ξ−,0b states is found to be M(Ξ−b)−M(Ξ0b)=4.7±4.7(stat)±0.7(syst) MeV/c2 . The isospin splitting of the Ξ0,+c states is found to be M(Ξ0c)−M(Ξ+c)=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(Ξ−b)=1.32±0.14(stat)±0.02(syst) ps,
τ(Ω−b)=1.66+0.53−0.40(stat)±0.02(syst) ps. | es_ES |
| dc.description.sponsorship | We thank the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported by the U.S. Department of Energy and National Science Foundation; the Italian Istituto Fisica Nucleare; the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Natural Sciences and Engineering Research Council of Canada;the National Science Council of the Republic of China; National Science Foundation; the A. P. Sloan Foundation; the Bundesministerium für Bildung und Forschung, Germany; the Korean World Class University Program, the National Research Foundation of Korea; the Science and Technology Facilities Council and the Royal Society, United Kingdom; the Russian Foundation for Basic Research; the Ministerio de Ciencia e Innovación,and Programa Consolider-Ingenio 2010, Spain; the Slovak R&D Agency; the Academy of Finland; the AustralianResearch Council (ARC); and the EU community Marie Curie Fellowship Contract No. 302103. | es_ES |
| dc.format.extent | 15 p. | es_ES |
| dc.language.iso | eng | es_ES |
| dc.publisher | American Physical Society | es_ES |
| dc.rights | © 2014 American Physical Society | * |
| dc.source | Phys. Rev. D, Vol. 89, Num. 7, Pag. 072014 (2014) | es_ES |
| dc.title | Mass and lifetime measurements of bottom and charm baryons in p¯p collisions at √s=1.96 TeV | es_ES |
| dc.type | info:eu-repo/semantics/article | es_ES |
| dc.relation.publisherVersion | https://doi.org/10.1103/PhysRevD.89.072014 | es_ES |
| dc.rights.accessRights | openAccess | es_ES |
| dc.identifier.DOI | 10.1103/PhysRevD.89.072014 | |
| dc.type.version | publishedVersion | es_ES |
