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

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2019_JHigEnPhys_LHCb_Amplitude.pdf (666.55 KB)
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URI: https://hdl.handle.net/10347/45136
E-ISSN: 1029-8479
DOI: 10.1007/JHEP07(2019)032

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2019-07-05

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The B0 → K∗0K∗0 and Bs0 → K∗0K∗0 decays are studied using proton-proton collision data corresponding to an integrated luminosity of 3fb−1. An untagged and time- integrated amplitude analysis of B0 → (K+π−)(K−π+) decays in two-body invariant (s) mass regions of 150MeV/c2 around the K∗0 mass is performed. A stronger longitudinal polarisation fraction in the B0 → 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

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B physics| Hadron-Hadron scattering (experiments)

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The LHCb collaboration., Aaij, R., Abellán Beteta, C. et al. Amplitude analysis of the B0 (s) → K∗0K∗0 decays and measurement of the branching fraction of the B0 → K∗0K∗0 decay. J. High Energ. Phys. 2019, 32 (2019). https://doi.org/10.1007/JHEP07(2019)032

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We express our gratitude to our colleagues in the CERN accelerator departments for the excellent performance of the LHC. We thank the technical and administrative staff at the LHCb institutes. We acknowledge support from CERN and from the national agencies: CAPES, CNPq, FAPERJ and FINEP (Brazil); MOST and NSFC (China); CNRS/IN2P3 (France); BMBF, DFG and MPG (Germany); INFN (Italy); NWO (Netherlands); MNiSW and NCN (Poland); MEN/IFA (Romania); MSHE (Russia); MinECo (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (United Kingdom); DOE NP and NSF (U.S.A.). We acknowledge the computing resources that are provided by CERN, IN2P3 (France), KIT and DESY (Germany), INFN (Italy), SURF (Netherlands), PIC (Spain), GridPP (United Kingdom), RRCKI and Yandex LLC (Russia), CSCS (Switzerland), IFINHH (Romania), CBPF (Brazil), PL-GRID (Poland) and OSC (U.S.A.). We are indebted to the communities behind the multiple open-source software packages on which we depend. Individual groups or members have received support from AvH Foundation (Germany); JHEP07(2019)032 EPLANET, Marie Sk lodowska-Curie Actions and ERC (European Union); ANR, Labex P2IO and OCEVU, and Région Auvergne-Rhône-Alpes (France); Key Research Program of Frontier Sciences of CAS, CAS PIFI, and the Thousand Talents Program (China); RFBR, RSF and Yandex LLC (Russia); GVA, XuntaGal and GENCAT (Spain); the Royal Society and the Leverhulme Trust (United Kingdom)

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© 2019, The Author(s). This is an open access article distributed under the terms of the Creative Commons CC BY license
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