Upper limits for charm hadron decays to two muons plus hadrons

K Kodama ,M Teranaka,I Tezuka,E Niu,O Kusumoto,Y Tsuzuki,Y Isokane,K Hoshino,T Toshitou,M Aryal,M Kazuno,Y Tsuneoka,J Yokota,H Yuuki,S Yoshida,K Reibel,H Okabe,K Moriyama,H Tajima,K Taruma,P Skubic,G Fujioka,Y Zhang,T Abe,N Ushida,K Niu,T Hara,K Nakamura,T Okusawa,S Ogawa,S Nakanishi,A Gauthier,H Shibuya,A Mokhtarani,P M Yager ,Shuji Watanabe ,K Niwa ,Douglas M Potter ,R Lipton ,B Lundberg ,Hirokazu Kitamura ,J H Cho ,T Shin ,Y Sato ,J Russ ,J Dunlea ,M Komatsu ,B Baller ,J S Kang ,Hiroyuki Shibata ,K Y Kim ,Momoko Yamaki ,J Volk ,Hiroshi Fukushima ,C O Kim ,W R Nichols ,T Y Kim ,S D Chang ,M S Park ,S Y Bahk ,T I Kim ,V Paolone ,R M Edelstein ,S Willis ,K Fujiwara ,N W Reay ,M A Nomura ,M Miyanishi ,Toshio Koya ,T Yoshida ,K S Sim ,S G Frederiksen ,J Song ,Kenji Okada ,R A Sidwell ,C S Yoon ,M Y Pac ,J Wilcox ,N R Stanton ,T Fujii ,Chiaki Yokoyama ,D Gibaut ,D C Kim ,T Tominaga ,S B Lee ,S Nam ,Mitsuhiro Nakamura ,I G Park ,S Kuramata ,Yoshiki Takahashi ,H I Jang ,G Oleynik ,A Freyberger ,N Yasuda ,Jong-Kwan Woo ,S Aoki ,I T Lim ,M Chikawa ,Yuya Nakamura ,C Zhang ,S H Chung ,J Y Kim ,K.s Chung ,M Kobayashi ,R J Stefanski ,G Kalbfleisch ,Kimitaka Nakazawa ,J Snow ,B G Cheon ,J C Lee ,G Y Lim ,Masao Kamiya ,S K Kim

doi:10.1016/0370-2693(94)01610-o

Upper limits for charm hadron decays to two muons plus hadrons

K Kodama , M Teranaka + Show 111 more

https://doi.org/10.1016/0370-2693(94)01610-o

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Journal: Physics Letters B	Publication Date: Feb 1, 1995
Citations: 38

Affiliation: Osaka City University, Utsunomiya University, Toho University, Kobe University, Nagoya Institute of Technology, Nagoya University, Kansas State University, The Ohio State University, Okayama University, University of Oklahoma, Carnegie Mellon University, Aichi University of Education, University of California, Davis, Korea University, Fermilab, Chonnam National University

#Hybrid Emulsion Spectrometer #Visible Masses + Show 8 more

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Abstract

A search for charm hadron decays into two muons plus one or more hadrons has been carried out using a hybrid emulsion spectrometer. This technique is sensitive to modes with missing neutrals, e.g. π 0 μ + μ − and ϱ ± μ + μ −, as well as to constrained modes having visible invariant masses equal to those of charm states. No evidence for any such decays has been found, which allows upper limits at the 90% confidence level as low as 1.8 × 10 −4 to be placed on the branching fractions for charm-changing neutral-current and lepton-number violating decay modes.

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