Antideuteron production in Υ(nS) decays and in e+e− → qq¯ at s√≈10.58 GeV
We present measurements of the inclusive production of antideuterons in e + e − annihilation into hadrons at ≈ 10.58 GeV center-of-mass energy and in Υ ( 1 S , 2 S , 3 S ) decays. The results are obtained using data collected by the BABAR detector at the PEP-II electron-positron collider. Assumi...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/131194 |
| Acceso en línea: | https://hdl.handle.net/2445/131194 |
| Access Level: | acceso abierto |
| Palabra clave: | Física de partícules Experiments Particle physics |
| Sumario: | We present measurements of the inclusive production of antideuterons in e + e − annihilation into hadrons at ≈ 10.58 GeV center-of-mass energy and in Υ ( 1 S , 2 S , 3 S ) decays. The results are obtained using data collected by the BABAR detector at the PEP-II electron-positron collider. Assuming a fireball spectral shape for the emitted antideuteron momentum, we find B ( Υ ( 1 S ) → ¯ d X ) = ( 2.81 ± 0.49 ( stat ) + 0.20 − 0.24 ( syst ) ) × 10 − 5 , B ( Υ ( 2 S ) → ¯ d X ) = ( 2.64 ± 0.11 ( stat ) + 0.26 − 0.21 ( syst ) ) × 10 − 5 , B ( Υ ( 3 S ) → ¯ d X ) = ( 2.33 ± 0.15 ( stat ) + 0.31 − 0.28 ( syst ) ) × 10 − 5 , and σ ( e + e − → ¯ d X ) = ( 9.63 ± 0.41 ( stat ) + 1.17 − 1.01 ( syst ) fb . |
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