TY - JOUR
T1 - Observation of the Ξb −→J/ψΛK− decay
AU - The LHCb collaboration
AU - Aaij, R.
AU - Adeva, B.
AU - Adinolfi, M.
AU - Ajaltouni, Z.
AU - Akar, S.
AU - Albrecht, J.
AU - Alessio, F.
AU - Alexander, M.
AU - Ali, S.
AU - Alkhazov, G.
AU - Alvarez Cartelle, P.
AU - Alves, A. A.
AU - Amato, S.
AU - Amerio, S.
AU - Amhis, Y.
AU - An, L.
AU - Anderlini, L.
AU - Andreassi, G.
AU - Andreotti, M.
AU - Andrews, J. E.
AU - Appleby, R. B.
AU - Archilli, F.
AU - d'Argent, P.
AU - Arnau Romeu, J.
AU - Artamonov, A.
AU - Artuso, M.
AU - Aslanides, E.
AU - Auriemma, G.
AU - Baalouch, M.
AU - Babuschkin, I.
AU - Bachmann, S.
AU - Back, J. J.
AU - Badalov, A.
AU - Baesso, C.
AU - Baker, S.
AU - Balagura, V.
AU - Baldini, W.
AU - Barlow, R. J.
AU - Barschel, C.
AU - Barsuk, S.
AU - Barter, W.
AU - Baryshnikov, F.
AU - Baszczyk, M.
AU - Batozskaya, V.
AU - Batsukh, B.
AU - Battista, V.
AU - Bay, A.
AU - Beaucourt, L.
AU - Calvo Gomez, M.
AU - Vilasis-Cardona, X.
N1 - Funding Information:
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); NSFC (China); CNRS/IN2P3 (France); BMBF , DFG and MPG (Germany); INFN (Italy); FOM and NWO (The Netherlands); MNiSW and NCN (Poland); MEN/IFA (Romania); MinES and FASO (Russia); MINECO (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (United Kingdom); NSF (USA). We acknowledge the computing resources that are provided by CERN, IN2P3 (France), KIT and DESY (Germany), INFN (Italy), SURF (The Netherlands), PIC (Spain), GridPP (United Kingdom), RRCKI and Yandex LLC (Russia), CSCS (Switzerland), IFIN-HH (Romania), CBPF (Brazil), PL-GRID (Poland) and OSC (USA). 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), EPLANET , Marie Skłodowska-Curie Actions and ERC (European Union), Conseil Général de Haute-Savoie , Labex ENIGMASS and OCEVU , Région Auvergne (France), RFBR and Yandex LLC (Russia), GVA , XuntaGal and GENCAT (Spain), Herchel Smith Fund , The Royal Society , Royal Commission for the Exhibition of 1851 and the Leverhulme Trust (United Kingdom).
Publisher Copyright:
© 2017 The Author(s)
PY - 2017/1/1
Y1 - 2017/1/1
N2 - The observation of the decay Ξb −→J/ψΛK− is reported, using a data sample corresponding to an integrated luminosity of 3fb−1, collected by the LHCb detector in pp collisions at centre-of-mass energies of 7 and 8TeV. The production rate of Ξb − baryons detected in the decay Ξb −→J/ψΛK− is measured relative to that of Λb 0 baryons using the decay Λb 0→J/ψΛ. Integrated over the b-baryon transverse momentum pT<25GeV/c and rapidity 2.0−2, where fΞb − and fΛb 0 are the fragmentation fractions of b→Ξb − and b→Λb 0 transitions, and B represents the branching fraction of the corresponding b-baryon decay. The mass difference between Ξb − and Λb 0 baryons is measured to be M(Ξb −)−M(Λb 0)=177.08±0.47 (stat)±0.16 (syst)MeV/c2.
AB - The observation of the decay Ξb −→J/ψΛK− is reported, using a data sample corresponding to an integrated luminosity of 3fb−1, collected by the LHCb detector in pp collisions at centre-of-mass energies of 7 and 8TeV. The production rate of Ξb − baryons detected in the decay Ξb −→J/ψΛK− is measured relative to that of Λb 0 baryons using the decay Λb 0→J/ψΛ. Integrated over the b-baryon transverse momentum pT<25GeV/c and rapidity 2.0−2, where fΞb − and fΛb 0 are the fragmentation fractions of b→Ξb − and b→Λb 0 transitions, and B represents the branching fraction of the corresponding b-baryon decay. The mass difference between Ξb − and Λb 0 baryons is measured to be M(Ξb −)−M(Λb 0)=177.08±0.47 (stat)±0.16 (syst)MeV/c2.
UR - http://www.scopus.com/inward/record.url?scp=85030541375&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2017.06.045
DO - 10.1016/j.physletb.2017.06.045
M3 - Article
AN - SCOPUS:85030541375
SN - 0370-2693
VL - 772
SP - 265
EP - 273
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -