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

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

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Parent link:	Journal of High Energy Physics Vol. 2019, iss. 7.— 2019.— [32, 30 p.]
Korporace:	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)
Další autoři:	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
Shrnutí:	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.
Jazyk:	angličtina
Vydáno:	2019
Témata:	электронный ресурс труды учёных ТПУ B physics Hadron-Hadron scattering (experiments)
On-line přístup:	https://doi.org/10.1007/JHEP07(2019)032
Médium:	Elektronický zdroj Kapitola
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663404

Popis
Shrnutí:	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