Search for the Flavor-Changing Neutral Current Decay D0→μ+μ− with the HERA-B Detector I Abt , M Adams , H Albrecht , A Aleksandrov , V Amaral , A Amorim , SJ Aplin , V Aushev , Y Bagaturia , V Balagura , M Bargiotti , O Barsukova , J Bastos , J Batista , C Bauer , TS Bauer , A Belkov , I Belotelov , A Bertin , B Bobchenko , M Bocker , A Bogatyrev , G Bohm , M Brauer , M Bruinsma , M Bruschi , P Buchholz , M Buchler , T Buran , J Carvalho , P Conde , C Cruse , M Dam , KM Danielsen , M Danilov , S De Castro , H Deppe , X Dong , HB Dreis , V Egorytchev , K Ehret , F Eisele , D Emeliyanov , S Essenov , L Fabbri , P Faccioli , M Feuerstack-Raible , J Flammer , B Fominykh , M Funcke , L Garrido , B Giacobbe , J Glass , D Goloubkov , Y Golubkov , A Golutvin , I Golutvin , I Gorbounov , A Gorisek , O Gouchtchine , DC Goulart , S Gradl , W Gradl , F Grimaldi , Y Guilitsky , JD Hansen , R Harr , JM Hernandez , W Hofmann , T Hott , W Hulsbergen , U Husemann , O Igonkina , M Ispiryan , T Jagla , C Jiang , F Khasanov , Y Kiryushin , KT Knopfle , H Kolanoski , S Korpar , C Krauss , P Kreuzer , P Krizan , D Krucker , S Kupper , T Kvaratskheliia , A Lanyov , K Lau , B Lewendel , T Lohse , B Lomonosov , R Manner , S Masciocchi , I Massa , I Matchikhilian , G Medin , M Medinnis , M Mevius , A Michetti , Y Mikhailov , R Mizuk , R Muresan , S Nam , M zur Nedden , M Negodaev , M Norenberg , S Nowak , MTNP de Vera , M Ouchrif , F Ould-Saada , C Padilla , D Peralta , R Pernack , R Pestotnik , M Piccinini , MA Pleier , M Poli , V Popov , A Pose , D Pose , S Prystupa , V Pugatch , Y Pylypchenko , J Pyrlik , K Reeves , D Ressing , H Rick , I Riu , P Robmann , V Rybnikov , F Sanchez , A Sbrizzi , M Schmelling , B Schmidt , A Schreiner , H Schroder , AJ Schwartz , AS Schwarz , B Schwenninger , B Schwingenheuer , F Sciacca , N Semprini-Cesari , J Shiu , S Shuvalov , L Silva , K Smirnov , L Sozuer , S Solunin , A Somov , S Somov , J Spengler , R Spighi , A Spiridonov , A Stanovnik , A Staric , C Stegmann , HS Subramania , A Symalla , I Tikhomirov , A Titov , I Tsakov , U Uwer , C van Eldik , Y Vassiliev , M Villa , A Vitale , I Vukotic , H Wahlberg , AH Walenta , M Walter , JJ Wang , D Wegener , U Werthenbach , H Wolters , R Wurth , A Wurz , Y Zaitsev , M Zavertyaev , T Zeuner , A Zhelezov , Z Zheng , R Zimmermann , T Zivko , A Zoccoli Physics letters B（2004）
摘要
We report on a search for the flavor-changing neutral current decay D-0 --> mu(+)mu(-) using 50 x 10(6) events recorded with a dimuon trigger in interactions of 920 GeV protons with nuclei by the HERA-B experiment. We find no evidence for such decays and set a 90% confidence level upper limit on the branching fraction beta(D-0 --> mu(+)mu(-)) < 2.0 x 10(-6). (C) 2004 Elsevier B.V. All rights reserved.
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关键词
decays of charmed mesons, FCNC
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