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DC Field | Value | Language |
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dc.contributor.author | Badalov, Alexey | - |
dc.contributor.author | Calvo Gómez, Míriam | - |
dc.contributor.author | Camboni, Alessandro | - |
dc.contributor.author | Garrido Beltrán, Lluís | - |
dc.contributor.author | Gascón Fora, David | - |
dc.contributor.author | Graciani Díaz, Ricardo | - |
dc.contributor.author | Graugés Pous, Eugeni | - |
dc.contributor.author | Marin Benito, Carla | - |
dc.contributor.author | Picatoste Olloqui, Eduardo | - |
dc.contributor.author | Rives Molina, Vicente José | - |
dc.contributor.author | Ruiz, Hugo (Ruiz Pérez) | - |
dc.contributor.author | Vilasis-Cardona, Xavier | - |
dc.contributor.author | LHCb Collaboration | - |
dc.date.accessioned | 2019-05-13T13:55:02Z | - |
dc.date.available | 2019-05-13T13:55:02Z | - |
dc.date.issued | 2014-07-15 | - |
dc.identifier.issn | 0031-9007 | - |
dc.identifier.uri | http://hdl.handle.net/2445/133085 | - |
dc.description.abstract | Using a proton-proton collision data sample corresponding to an integrated luminosity of 3 fb − 1 collected by LHCb at center-of-mass energies of 7 and 8 TeV, about 3800 Ξ 0 b → Ξ + c π − , Ξ + c → p K − π + signal decays are reconstructed. From this sample, the first measurement of the Ξ 0 b baryon lifetime is made, relative to that of the Λ 0 b baryon. The mass differences M ( Ξ 0 b ) − M ( Λ 0 b ) and M ( Ξ + c ) − M ( Λ + c ) are also measured with precision more than 4 times better than the current world averages. The resulting values are τ Ξ 0 b τ Λ 0 b = 1.006 ± 0.018 ± 0.010 , M ( Ξ 0 b ) − M ( Λ 0 b ) = 172.44 ± 0.39 ± 0.17 MeV / c 2 , M ( Ξ + c ) − M ( Λ + c ) = 181.51 ± 0.14 ± 0.10 MeV / c 2 , where the first uncertainty is statistical and the second is systematic. The relative rate of Ξ 0 b to Λ 0 b baryon production is measured to be f Ξ 0 b f Λ 0 b B ( Ξ 0 b → Ξ + c π − ) B ( Λ 0 b → Λ + c π − ) B ( Ξ + c → p K − π + ) B ( Λ + c → p K − π + ) = ( 1.88 ± 0.04 ± 0.03 ) × 1 0 − 2 , where the first factor is the ratio of fragmentation fractions, b → Ξ 0 b relative to b → Λ 0 b . Relative production rates as functions of transverse momentum and pseudorapidity are also presented. | - |
dc.format.extent | 10 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | American Physical Society | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.113.032001 | - |
dc.relation.ispartof | Physical Review Letters, 2014, vol. 113, num. 3, p. 032001 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevLett.113.032001 | - |
dc.rights | cc by (c) CERN; LHCb Collaboration, 2014 | - |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/es/ | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Física de partícules | - |
dc.subject.classification | Experiments | - |
dc.subject.other | Particle physics | - |
dc.subject.other | Experiments | - |
dc.title | Precision Measurement of the Mass and Lifetime of the Ξ0b Baryon | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 645755 | - |
dc.date.updated | 2019-05-13T13:55:02Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Física Quàntica i Astrofísica) |
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645755.pdf | 461.39 kB | Adobe PDF | View/Open |
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