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http://earchive.tpu.ru/handle/11683/57710
Title: | Observation of the decay Λ b 0 → ψ(2S)pπ− |
Authors: | Aaij, Roel Adeva, Bernardo Adinolfi, Marco Aidala, Christine Panshin, Gennady Leonidovich Strokov, Sergey Aleksandrovich Vagner, Aleksandr Rudolfovich |
Keywords: | физика; адронное взаимодействие |
Issue Date: | 2018 |
Publisher: | Томский политехнический университет |
Citation: | Observation of the decay Λ b 0 → ψ(2S)pπ− / R. Aaij [et al.] // Journal of High Energy Physics. — 2018. — № 8. — [131, 19 p.]. |
Abstract: | The Cabibbo-suppressed decay Λ b 0 → ψ(2S)pπ− is observed for the first time using a data sample collected by the LHCb experiment in proton-proton collisions corresponding to 1.0, 2.0 and 1.9 fb−1 of integrated luminosity at centre-of-mass energies of 7, 8 and 13 TeV, respectively. The ψ(2S) mesons are reconstructed in the μ+μ− final state. The branching fraction with respect to that of the Λ b 0 → ψ(2S)pK− decay mode is measured to beB(Λ0b→ψ(2S)pπ−)B(Λ0b→ψ(2S)pK−)=(11.4±1.3±0.2)%,B(Λb0→ψ(2S)pπ−)B(Λb0→ψ(2S)pK−)=(11.4±1.3±0.2)%,where the first uncertainty is statistical and the second is systematic. The ψ(2S)p and ψ(2S)π−mass spectra are investigated and no evidence for exotic resonances is found. |
URI: | http://earchive.tpu.ru/handle/11683/57710 |
Appears in Collections: | Репринты научных публикаций |
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