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http://hdl.handle.net/2445/131430
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DC Field | Value | Language |
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dc.contributor.author | Graugés Pous, Eugeni | - |
dc.contributor.author | BABAR Collaboration | - |
dc.date.accessioned | 2019-04-04T13:36:31Z | - |
dc.date.available | 2019-04-04T13:36:31Z | - |
dc.date.issued | 2007-01-09 | - |
dc.identifier.issn | 1550-7998 | - |
dc.identifier.uri | http://hdl.handle.net/2445/131430 | - |
dc.description.abstract | We present measurements of the total production rates and momentum distributions of the charmed baryon Λ + c in e + e − → hadrons at a center-of-mass energy of 10.54 GeV and in Υ ( 4 S ) decays. In hadronic events at 10.54 GeV, charmed hadrons are almost exclusively leading particles in e + e − → c ¯ c events, allowing direct studies of c -quark fragmentation. We measure a momentum distribution for Λ + c baryons that differs significantly from those measured previously for charmed mesons. Comparing with a number of models, we find none that can describe the distribution completely. We measure an average scaled momentum of ⟨ x p ⟩ = 0.574 ± 0.009 and a total rate of N q ¯ q Λ c = 0.057 ± 0.002 ( exp . ) ± 0.015 ( BF ) Λ + c per hadronic event, where the experimental error is much smaller than that due to the branching fraction into the reconstructed decay mode, p K − π + . In Υ ( 4 S ) decays we measure a total rate of N Υ Λ c = 0.091 ± 0.006 ( exp . ) ± 0.024 ( BF ) per Υ ( 4 S ) decay, and find a much softer momentum distribution than expected from B decays into a Λ + c plus an antinucleon and one to three pions. | - |
dc.format.extent | 16 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/PhysRevD.75.012003 | - |
dc.relation.ispartof | Physical Review D, 2007, vol. 75, num. 1, p. 012003 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevD.75.012003 | - |
dc.rights | (c) American Physical Society, 2007 | - |
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 | Inclusive Λ+c production in e+e− annihilations at √s=10.54 GeV and in Υ(4S) decays | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 551682 | - |
dc.date.updated | 2019-04-04T13:36:32Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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551682.pdf | 587.73 kB | Adobe PDF | View/Open |
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