$Amplitude analysis of the B0(s)→K∗0K¯∗0B(s)0→K∗0K¯∗0 decays and measurement of the branching fraction of the B0→K∗0K¯∗0B0→K∗0K¯∗0 decay; Journal of High Energy Physics; Vol. 2019, iss. 7$

Amplitude analysis of the B0(s)→K∗0K¯∗0B(s)0→K∗0K¯∗0 decays and measurement of the branching fraction of the B0→K∗0K¯∗0B0→K∗0K¯∗0 decay

Opis bibliograficzny
Parent link:	Journal of High Energy Physics Vol. 2019, iss. 7.— 2019.— [32, 30 p.]
organizacja autorów:	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)
Kolejni autorzy:	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
Streszczenie:	Title screen The B0→K∗0K¯∗0B0→K∗0K¯∗0 and B0s→K∗0K¯∗0Bs0→K∗0K¯∗0 decays are studied using proton-proton collision data corresponding to an integrated luminosity of 3 fb−1. An untagged and timeintegrated amplitude analysis of B0(s) → (K+π−)(K−π+) decays in two-body invariant mass regions of 150 MeV/c2 around the K∗0 mass is performed. A stronger longitudinal polarisation fraction in the B0→K∗0K¯∗0B0→K∗0K¯∗0 decay, fL = 0.724 ± 0.051 (stat) ± 0.016 (syst), is observed as compared to fL = 0.240 ± 0.031 (stat) ± 0.025 (syst) in the B0s→K∗0K¯∗0Bs0→K∗0K¯∗0 decay. The ratio of branching fractions of the two decays is measured and used to determine B(B0→K∗0K¯∗0)=(8.0±0.9(stat)±0.4(syst))×10−7B(B0→K∗0K¯∗0)=(8.0±0.9(stat)±0.4(syst))×10−7.
Język:	angielski
Wydane:	2019
Hasła przedmiotowe:	электронный ресурс труды учёных ТПУ B physics Hadron-Hadron scattering (experiments)
Dostęp online:	https://doi.org/10.1007/JHEP07(2019)032
Format:	Elektroniczne Rozdział
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663404

Opis
Streszczenie:	Title screen The B0→K∗0K¯∗0B0→K∗0K¯∗0 and B0s→K∗0K¯∗0Bs0→K∗0K¯∗0 decays are studied using proton-proton collision data corresponding to an integrated luminosity of 3 fb−1. An untagged and timeintegrated amplitude analysis of B0(s) → (K+π−)(K−π+) decays in two-body invariant mass regions of 150 MeV/c2 around the K∗0 mass is performed. A stronger longitudinal polarisation fraction in the B0→K∗0K¯∗0B0→K∗0K¯∗0 decay, fL = 0.724 ± 0.051 (stat) ± 0.016 (syst), is observed as compared to fL = 0.240 ± 0.031 (stat) ± 0.025 (syst) in the B0s→K∗0K¯∗0Bs0→K∗0K¯∗0 decay. The ratio of branching fractions of the two decays is measured and used to determine B(B0→K∗0K¯∗0)=(8.0±0.9(stat)±0.4(syst))×10−7B(B0→K∗0K¯∗0)=(8.0±0.9(stat)±0.4(syst))×10−7.
DOI:	10.1007/JHEP07(2019)032