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LHCb collaboration; Aaij, R.; Beteta, C. Abellan; Adametz, A.; Adeva, B.; Adinolfi, M.; Adrover, C.; Affolder, A.; Ajaltouni, Z.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Cartelle, P. Alvarez; Alves Jr, A. A.; Amato, S.; Amhis, Y.; Anderlini, L.; Anderson, J.; Appleby, R. B.; Gutierrez, O. Aquines; Archilli, F.; Artamonov, A.; Artuso, M.; Aslanides, E.; Auriemma, G.; Bachmann, S.; Back, J. J.; Baesso, C. ... view all 620 authors View less authors (2012)
Publisher: Springer Berlin Heidelberg
Languages: English
Types: Article
Subjects: QC, Nuclear counters, Interaccions d'hadrons, Hadron interactions, Physics Institute, High Energy Physics - Experiment, Hadrons, Detectors de radiació, Física nuclear, 530 Physics, Nuclear physics, Nuclear and High Energy Physics
Abstract: Evidence for the hadronic annihilation decay mode B[superscript +] → D[superscript +][subscript s] φ is found with greater than 3σ significance. The branching fraction and CP asymmetry are measured to be B(B[superscript +] → D[superscript +][subscript s] φ) = 1.87 +1.25 −0.73 (stat) ± 0.19 (syst) ± 0.32 (norm) × 10[superscript −6], A[subscript CP] (B[superscript +] → D[superscript +][subscript s] φ) = −0.01 ± 0.41 (stat) ± 0.03 (syst). The last uncertainty on B(B[superscript +] → D[superscript +][subscript s] φ) is from the branching fractions of the B[superscript +]→ D[superscript +][subscript s] [bar over D][superscript 0] normalization mode and intermediate resonance decays. Upper limits are also set for the branching fractions of the related decay modes B [superscript +][subscript (c)] → D[superscript +][subscript (s)]K[superscript ∗0], B[superscript +][subscript (c)] → D[superscript +][subscript (s)][bar overK][superscript ∗0] and B[superscript +][subscript c] → D[superscript +][subscript s] φ, including the result B(B[superscript +] → D[superscript +]K[superscript ∗0]) < 1.8×10−6 at the 90% credibility level.
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    • 44 Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
    • 45 Department of Physics, University of Warwick, Coventry, United Kingdom
    • 46 STFC Rutherford Appleton Laboratory, Didcot, United Kingdom
    • 47 School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
    • 48 School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
    • 49 Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
    • 50 Imperial College London, London, United Kingdom
    • 51 School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
    • 52 Department of Physics, University of Oxford, Oxford, United Kingdom
    • 53 Syracuse University, Syracuse, NY, United States
    • 54 Pontif cia Universidade Catolica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil, associated to 2
    • 55 Institut fur Physik, Universitat Rostock, Rostock, Germany, associated to 11
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