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Title: | Observation of the decay B¯0s→χc2K+K−B¯s0→χc2K+K− in the ϕ mass region |
Authors: | Aaij, Roel Adeva, Bernardo Adinolfi, Marco 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 B¯0s→χc2K+K−B¯s0→χc2K+K− in the ϕ mass region / R. Aaij [et al.] // Journal of High Energy Physics. — 2018. — № 8. — [191, 20 p.]. |
Abstract: | The B¯¯¯¯0s→χc2K+K−B¯s0→χc2K+K− decay mode is observed and its branching fraction relative to the corresponding χc1 decay mode, in a ±15 MeV/c2 window around the ϕ mass, is found to beB(B¯¯¯¯0s→χc2K+K−)B(B¯¯¯¯0s→χc1K+K−)=(17.1±3.1±0.4±0.9)%,B(B¯s0→χc2K+K−)B(B¯s0→χc1K+K−)=(17.1±3.1±0.4±0.9)%,where the first uncertainty is statistical, the second systematic and the third due to the knowledge of the branching fractions of radiative χc decays. The decay mode B¯¯¯¯0s→χc1K+K−B¯s0→χc1K+K−allows the B s 0 mass to be measured asm(B0s)=5366.83±0.25±0.27 MeV/c2,m(Bs0)=5366.83±0.25±0.27 MeV/c2,where the first uncertainty is statistical and the second systematic. A combination of this result with other LHCb determinations of the B s 0 mass is made. |
URI: | http://earchive.tpu.ru/handle/11683/57781 |
Appears in Collections: | Репринты научных публикаций |
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