Êtes-vous un étudiant de l'EPFL à la recherche d'un projet de semestre?
Travaillez avec nous sur des projets en science des données et en visualisation, et déployez votre projet sous forme d'application sur GraphSearch.
We report the results of a search for the B -> Y(4260)K, Y(4260) -> J/psi pi(+)pi thorn p-decays. This study is based on a data sample corresponding to an integrated luminosity of 711 fb(-1), collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We investigate the J/psi pi(+)pi(-) thorn p-invariant mass distribution in the range 4.0 to 4.6 GeV/c(2) using both B+ -> J/psi pi(+)pi K--(+) and B-0 -> J/psi pi(+)pi K--(S)0 decays. We find excesses of events above the background levels, with significances of 2.1 and 0.9 standard deviations for charged and neutral B -> Y(4260)K decays, respectively, taking into account the systematic uncertainties. These correspond to upper limits on the product of branching fractions, B(B+ -> Y(4260)K+) x B(Y(4260) -> J/psi pi(+)pi(-)) < 1.4 x 10(-5) and B(B-0 -> Y(4260)K-0) x B(Y(4260) -> J/psi pi(+)pi(-)) < 1.7 x 10(-5) at the 90% confidence level.
Chargement
Chargement
Chargement
Chargement
Chargement
Tagir Aushev, Donghyun Kim, Ji Hyun Kim, Jing Li, Olivier Schneider, Mingkui Wang, Xiao Wang
Tagir Aushev, Vladislav Balagura, Sun Hee Kim, Ji Hyun Kim, Jing Li, Remi Léandre Albert Louvot, Olivier Schneider, Jean Wicht
Tagir Aushev, Ji Hyun Kim, Jing Li, Zhen Liu, Remi Léandre Albert Louvot, Olivier Schneider, Mingkui Wang