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

LHCb Collaboration

doi:10.1007/JHEP07(2019)032

Amplitude analysis of the B⁰_(s)→K^∗0 K̅^¯∗0 decays and measurement of the branching fraction of the B⁰→ K^∗0K̅¯^∗0 decay

LHCb Collaboration

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

157 Downloads (Pure)

Abstract

The B⁰→ K^∗0K̅¯^∗0 and B_s⁰→K^∗0 K̅^¯∗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 B⁰→ K^∗0K̅¯^∗0 decay, f_L = 0.724 ± 0.051 (stat) ± 0.016 (syst), is observed as compared to f_L = 0.240 ± 0.031 (stat) ± 0.025 (syst) in the B_s⁰→K^∗0 K̅^¯∗0 decay. The ratio of branching fractions of the two decays is measured and used to determine ℬ(B⁰→ K^∗0K̅¯^∗0)=(8.0±0.9(stat)±0.4(syst))×10⁻⁷.

Original language	English
Article number	32
Number of pages	31
Journal	Journal of High Energy Physics
Volume	2019
Issue number	7
DOIs	https://doi.org/10.1007/JHEP07(2019)032
Publication status	Published - 5 Jul 2019

Keywords

B physics
Hadron-Hadron scattering (experiments)

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1007/JHEP07(2019)032Licence: Creative Commons: Attribution (CC BY)

Aaij_et_al_Amplitude_analysis_of_the_B0(s)→K∗0_K̅¯∗0_decays_and_measurement_of_the_branching_fraction_of_the_B0→_K∗0K̅¯∗0_decay_Journal_of_High_Energy_Physics_2019Final published version, 667 KBLicence: Creative Commons: Attribution (CC BY)

Cite this

@article{c3cc7d8bf6704aa6b350958962cf2ee3,

title = "Amplitude analysis of the B0(s)→K∗0 K̅¯∗0 decays and measurement of the branching fraction of the B0→ K∗0K̅¯∗0 decay",

abstract = "The B0→ K∗0K̅¯∗0 and Bs0→K∗0 K̅¯∗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 B0→ K∗0K̅¯∗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∗0 K̅¯∗0 decay. The ratio of branching fractions of the two decays is measured and used to determine ℬ(B0→ K∗0K̅¯∗0)=(8.0±0.9(stat)±0.4(syst))×10−7.",

keywords = "B physics, Hadron-Hadron scattering (experiments)",

author = "\{LHCb Collaboration\} and R. Aaij and \{Abell{\'a}n Beteta\}, C. and B. Adeva and M. Adinolfi and Aidala, \{C. A.\} and Z. Ajaltouni and S. Akar and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and \{Alfonso Albero\}, A. and G. Alkhazov and \{Alvarez Cartelle\}, P. and Alves, \{A. A.\} and S. Amato and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and Andrews, \{J. E.\} and F. Archilli and \{Arnau Romeu\}, J. and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and Back, \{J. J.\} and S. Baker and V. Balagura and W. Baldini and S. Bifani and R. Calladine and G. Chatzikonstantinidis and N. Farley and P. Griffith and P. Ilten and C. Lazzeroni and L. Pescatore and J. Plews and D. Popov and A. Sergi and Slater, \{M. W.\} and Watson, \{N. K.\} and T. Williams and Zarebski, \{K. A.\}",

year = "2019",

month = jul,

day = "5",

doi = "10.1007/JHEP07(2019)032",

language = "English",

volume = "2019",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer",

number = "7",

}

TY - JOUR

T1 - Amplitude analysis of the B0(s)→K∗0 K̅¯∗0 decays and measurement of the branching fraction of the B0→ K∗0K̅¯∗0 decay

AU - LHCb Collaboration

AU - Aaij, R.

AU - Abellán Beteta, C.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Aidala, C. A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Alves, A. A.

AU - Amato, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreassi, G.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Archilli, F.

AU - Arnau Romeu, J.

AU - Artamonov, A.

AU - Artuso, M.

AU - Arzymatov, K.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bachmann, S.

AU - Back, J. J.

AU - Baker, S.

AU - Balagura, V.

AU - Baldini, W.

AU - Bifani, S.

AU - Calladine, R.

AU - Chatzikonstantinidis, G.

AU - Farley, N.

AU - Griffith, P.

AU - Ilten, P.

AU - Lazzeroni, C.

AU - Pescatore, L.

AU - Plews, J.

AU - Popov, D.

AU - Sergi, A.

AU - Slater, M. W.

AU - Watson, N. K.

AU - Williams, T.

AU - Zarebski, K. A.

PY - 2019/7/5

Y1 - 2019/7/5

N2 - The B0→ K∗0K̅¯∗0 and Bs0→K∗0 K̅¯∗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 B0→ K∗0K̅¯∗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∗0 K̅¯∗0 decay. The ratio of branching fractions of the two decays is measured and used to determine ℬ(B0→ K∗0K̅¯∗0)=(8.0±0.9(stat)±0.4(syst))×10−7.

AB - The B0→ K∗0K̅¯∗0 and Bs0→K∗0 K̅¯∗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 B0→ K∗0K̅¯∗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∗0 K̅¯∗0 decay. The ratio of branching fractions of the two decays is measured and used to determine ℬ(B0→ K∗0K̅¯∗0)=(8.0±0.9(stat)±0.4(syst))×10−7.

KW - B physics

KW - Hadron-Hadron scattering (experiments)

UR - https://www.scopus.com/pages/publications/85068778582

U2 - 10.1007/JHEP07(2019)032

DO - 10.1007/JHEP07(2019)032

M3 - Article

AN - SCOPUS:85068778582

SN - 1126-6708

VL - 2019

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 7

M1 - 32

ER -

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