First observation of B0 s→D*s2+Xμν̄- decays
Roel Aaij,Bernardo Adeva,Marco Adinolfi, C. Adrover,Anthony A. Affolder,Michaela Agari,Zeina J. Ajaltouni,Johannes Albrecht,Federico Alessio,Marc Alexander,P. Alvarez Cartelle,Alexandre Alonso Alves,S. F. Amato,Yasmine Amhis,Jan M. Amoraal,John T. Anderson,R. Antunes Nobrega,Robert B. Appleby,O. Aquines Gutierrez,A. Arefyev,L. Arrabito,Marina Artuso,E. L. Aslanides,Giulio Auriemma,Sebastian Bachmann,David S. Bailey,Vladislav Balagura,W. Baldini,Roger Barlow,C. Barschel,Sergey Ya Barsuk,Sergey G. Basiladze,Alison G. Bates,Christian W. Bauer,Th S. Bauer,Aurelio Bay,Ignacio Bediaga,K. S. Belous,Ivan M. Belyaev,Marc D. Benayoun,Giorgio Bencivenni,Roland Bernet,Marc Olivier Bettler,Martin G. Van Beuzekom,Simone Bifani,Andrea Bizzeti,P. M. Bjørnstad,Thomas A. Blake,F. L E Blanc,Christopher Blanks,Johan Blouw,Steven R. Blusk,Aleksandr V. Bobrov,Valerio Bocci,B. Bochin, Alex E. Bondar,Nikolai F. Bondar,W. Bonivento,Silvia Borghi,Alessandra Borgia,E. Bos,Themis J V Bowcock,Concezio Bozzi,T. 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De Paula,Patrizia De Simone,D. Décamp,Hubert Degaudenzi,Marc Deissenroth,L. Del Buono,Caterina Deplano,Olivier Deschamps,Francesco Dettori,Jeremy Kirk Dickens,Hans B. Dijkstra,Mihai Octavian Dima,S. Donleavy,PJ J. Dornan,D. Dossett,Anatoliy N. Dovbnya,Frédéric Dupertuis,Rustem I. Dzhelyadin,C. Eames,Sajan Easo,Ulrik Egede,Victor Yu Egorychev,Simon I. Eidelman,Daan Van Eijk,Franz Eisele,Stephan Eisenhardt,Lars M. Eklund,David G. D'Enterria,D. Esperante Pereira,L. Estève,Erica Fanchini,Ch Färber,G. Fardell,C. Farinelli,Stephen Farry,Vincent Fave,Víctor Fernández Albor,Massimiliano Ferro-Luzzi,Sergey N. Filippov,C. R. Fitzpatrick,Wilfred Flegel,Flavio Fontanelli,Roger W. Forty,Markus J. Frank,C. Frei,M. Frosini,J. L. Fungueiriño Pazos,S. Furcas,A. A. Gallas Torreira,Domenico D. Galli,Miriam Gandelman,Paolo Gandini,Ya Gao,Jean Christophe Garnier,Justin A. Garofoli,LI I. Garrido,Clara Gaspar,J. Gassner,N. Gauvin,Ph H. Gavillet,Marco Gersabeck,Tim J. Gershon,Ph Ghez,Valerie Gibson,Vladimir Vava Gligorov,Carla Göbel,D. Yu Golubkov,Andrey I. Golutvin,Alvaro H A Gomes,Guanghua Gong, Hui Gong,Hamish A. Gordon,M. Grabalosa Gándara,Ricardo Graciani Díaz,L. A. Granado Cardoso,Eugeni S. Graugés,Giacomo Graziani,Alexandru T. Grecu,S. Gregson,Baosong Gui,Evgeny N. Gushchin,Yu P. Guz,Zbigniew Guzik,Thierry Gys,Guido Haefeli,S. C. Haines,T. Hampson,Stephanie Hansmann-Menzemer,R. Harji,Neville Harnew,Paul F. Harrison,Jibo He,Karol Hennessy,Pierre Henrard,J. A. Hernando Morata,Eric E. Van Herwijnen,Adlène Hicheur,E. Hicks,Hans Jurgen Hilke,Werner P. Hofmann,Kostyantyn Holubyev,P. Hopchev,Wouter D. Hulsbergen,Philip John Hunt,Torkjell Huse,R. S. Huston,David E. Hutchcroft,V. M. Iakovenko,C. Iglesias Escudero,Christoph J. Ilgner,Philip H. Ilten,J. P. Imong,Richard Jacobsson,M. Jahjah Hussein,Eddy Jans,F. Jansen,P. Jaton,B. Jean-Marie,F. F. Jing,Malcolm J J John,Donald Randolph E Johnson,Christopher R. 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PHYSICS LETTERS B（2011）
引用 41|浏览205
摘要
Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays (B) over bar (0)(s) -> D+X mu(-)(nu) over bar and (B) over bar (0)(s) -> (DK+X)-K-0 mu(-)(nu) over bar are detected. Two structures are observed in the (DK+)-K-0 mass spectrum at masses consistent with the known D-s1(2536)(+) and D-s2*(2573)(+) mesons. The measured branching fractions relative to the total (B) over bar (0)(s) semileptonic rate are B((B) over bar (0)(s) -> (Ds2X)-X-*mu(-)(nu) over bar /B(B-2(-0) -> X mu(-)(nu) over bar) = (3.3 +/- 1.0 +/- 0.4)%, and B((B) over bar (0)(s) -> (Ds2X)-X-*mu(-)(nu) over bar /B(B-2(-0) -> X mu(-)(nu) over bar) = (5.4 +/- 1.2 +/- 0.5)%, where the first uncertainty is statistical and the second is systematic. This is the first observation of the D-s2*(+) state in B-s2*(+) decays; we also measure its mass and width. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.
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关键词
LHC,Semileptonic b decays,(B)over-bar(s)(0) meson
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