Abstract: A search is performed for D sJ (*) + mesons in the reactions pp → D ∗ +K S 0X and pp → D *0K +X using data collected at centre-of-mass energies of 7 and 8 TeV with the LHCb detector. For the D ∗ +K S 0 final state, the decays D *+ → D 0π + with D 0 → K −π + and D 0 → K −π +π +π − are used. For D *0K +, the decay D *0 → D 0π 0 with D 0 → K −π + is used. A prominent D s1(2536) + signal is observed in both D ∗ +K S 0 and D *0K + final states. The resonances D s1 *(2700) + and D s3 *(2860) + are also observed, yielding information on their properties, including spin-parity assignments. The decay D s2 *(2573) + → D ∗ +K S 0 is observed for the first time, at a significance of 6.9 σ, and its branching fraction relative to the D s2 *(2573) + → D +K S 0 decay mode is measured.[Figure not available: see fulltext.]
Bibliographical noteFunding 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 FANO (Russia); MinECo (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (United Kingdom); NSF (U.S.A.). 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 (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), EPLANET, Marie Sk lodowska-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), The Royal Society, Royal Commission for the Exhibition of 1851 and the Leverhulme Trust (United Kingdom).
© 2016, The Author(s).
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics