First observation of the decay B<inf>s</inf><sup>0</sup>→K<sup>*0</sup>K̄<sup>*0</sup>

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, Y. Amhis, J. Anderson, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, L. ArrabitoA. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, S. Bachmann, J. J. Back, D. S. Bailey, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, A. Bates, C. Bauer, T. Bauer, A. Bay, I. Bediaga, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, M. Benayoun, G. Bencivenni, S. Benson, J. Benton, R. Bernet, M. O. Bettler, M. van Beuzekom, A. Bien, S. Bifani, A. Bizzeti, P. M. Bjørnstad, T. Blake, F. Blanc, C. Blanks, J. Blouw, S. Blusk, A. Bobrov, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, T. J.V. Bowcock, C. Bozzi, T. Brambach, J. van den Brand, J. Bressieux, D. Brett, S. Brisbane, M. Britsch, T. Britton, N. H. Brook, H. Brown, A. Büchler-Germann, I. Burducea, A. Bursche, J. Buytaert, S. Cadeddu, J. M. Caicedo Carvajal, O. Callot, M. Calvi, M. Calvo Gomez, A. Camboni, P. Campana, A. Carbone, G. Carboni, R. Cardinale, A. Cardini, L. Carson

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

The first observation of the decay B s 0→K *0*0 is reported using 35 pb -1 of data collected by LHCb in proton-proton collisions at a centre-of-mass energy of 7 TeV. A total of 49.8±7.5 Bs0→(K +π -)(K -π +) events are observed within ±50 MeV/c 2 of the B s 0 mass and 746 MeV/c 2<m <1046 MeV/c 2, mostly coming from a resonant B s 0→K *0*0 signal. The branching fraction and the CP-averaged K *0 longitudinal polarization fraction are measured to be B(B s 0→K *0*0)=(2.81±0.46(stat.)±0.45(syst.)±0.34(f s/f d))×10 -5 and f L=0.31±0.12(stat.)±0.04(syst.).

Original languageEnglish
Pages (from-to)50-58
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume709
Issue number1-2
DOIs
Publication statusPublished - 13 Mar 2012
Externally publishedYes

Bibliographical note

Funding Information:
We would like to thank J. Matías for useful discussions. 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 CERN and at the LHCb institutes, and acknowledge support from the National Agencies: National Agencies: CAPES , CNPq , FAPERJ and FINEP (Brazil); CERN ; NSFC (China); CNRS/IN2P3 (France); BMBF , DFG , HGF and MPG (Germany); SFI (Ireland); INFN (Italy); FOM and NWO (The Netherlands); SCSR (Poland); ANCS (Romania); MinES of Russia and Rosatom (Russia); MICINN , XuntaGal and GENCAT (Spain); SNSF and SER (Switzerland); NAS Ukraine (Ukraine); STFC (United Kingdom); NSF (USA). We also acknowledge the support received from the ERC under FP7 and the Region Auvergne .

Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Fingerprint

Dive into the research topics of 'First observation of the decay B<inf>s</inf><sup>0</sup>→K<sup>*0</sup>K̄<sup>*0</sup>'. Together they form a unique fingerprint.

Cite this