Observation of the Λ0b→χc1Λb0→χc1 (3872) pK− decay; Journal of High Energy Physics; Vol. 2019, iss. 9

Observation of the Λ0b→χc1Λb0→χc1 (3872) pK− decay; Journal of High Energy Physics; Vol. 2019, iss. 9

Dades bibliogràfiques
Parent link:Journal of High Energy Physics
Vol. 2019, iss. 9.— 2019.— [28, 19 p.]
Autor corporatiu: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов, Национальный исследовательский Томский политехнический университет Инженерная школа информационных технологий и робототехники Отделение автоматизации и робототехники (ОАР)
Altres autors: Aaij R. Roel, Beteta C. A. Carlos Abellan, Adeva B. Bernardo, Eydelman S. I. Semen Isaakovich, Kharisova A. E. Anastasiya Evgenjevna, Panshin G. L. Gennady Leonidovich, Strokov S. A. Sergey Aleksandrovich
Sumari:Title screen
Using proton-proton collision data, collected with the LHCb detector and corresponding to 1.0, 2.0 and 1.9 fb−1 of integrated luminosity at the centre-of-mass energies of 7, 8, and 13 TeV, respectively, the decay Λ0b→χc1Λb0→χc1(3872)pK− with χc1(3872) → J/ψ π+π− is observed for the first time. The significance of the observed signal is in excess of seven standard deviations. It is found that (58 ± 15)% of the decays proceed via the two-body intermediate state χc1(3872)Λ(1520). The branching fraction with respect to that of the Λ0bΛb0 → ψ(2S)pK− decay mode, where the ψ(2S) meson is reconstructed in the J/ψ π+π− final state, is measured to be:β(Λ0b→χc1(3872)pK−)/β(Λ0b→ψ(2S)pK−)×β(χc1(3872)→J/ψπ+π−)/β(ψ(2S)→J/ψπ+π−)=(5.4±1.1±0.2)×10−2,β(Λb0→χc1(3872)pK−)β(Λb0→ψ(2S)pK−)×β(χc1(3872)→J/ψπ+π−)β(ψ(2S)→J/ψπ+π−)=(5.4±1.1±0.2)×10−2,where the first uncertainty is statistical and the second is systematic.
Idioma:anglès
Publicat: 2019
Matèries:
электронный ресурс
труды учёных ТПУ
branching fraction
Hadron-Hadron scattering (experiments)
B physics
Exotics
Accés en línia:https://doi.org/10.1007/JHEP09(2019)028
Format: Electrònic Capítol de llibre
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663413

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