Amplitude analysis of the B0 (s)! K0K0 decays and measurement of the branching fraction of the B0! K0K0 decay
- Authors
- Aaij R
- Adeva B
- Adinolfi M
- Aidala CA
- Ajaltouni Z
- Akar S
- Akiba KC
- Albero AA
- Albicocco P
- Albrecht J
- Alepuz CR
- Alessio F
- Alexander M
- Alkhazov G
- Altarelli MP
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- Amato S
- Amhis Y
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- Anderlini L
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- Andreotti M
- Andrews JE
- Aoude RTJ
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- Artamonov A
- Artuso M
- Arzymatov K
- Aslanides E
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- Berezhnoy A
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- Berninghoff D
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- Publication date
- 1 January 2019
- Publisher
- 'Springer Science and Business Media LLC'
- Doi
Abstract
The B→ K∗ 0K¯ ∗ 0 and Bs0→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 B(s)0 → (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 B→ 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 Bs0→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))×10−7.[Figure not available: see fulltext.Similar works
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