Upper limits on the decay D0--> micro+ micro- and on D0-D-bar0 mixing.

W C Louis,K W Merritt,E I Rosenberg,K J Anderson,J G Heinrich,J E Pilcher,A J S Smith,K T Mcdonald,J P Alexander,C Biino,J S Conway,S Palestini,D T Simpson,F C Shoemaker,C E Adolphsen,J F Greenhalgh

doi:10.1103/physrevlett.56.1027

Upper limits on the decay D0--> micro+ micro- and on D0-D-bar0 mixing.

W C Louis, K W Merritt + Show 14 more

https://doi.org/10.1103/physrevlett.56.1027

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Journal: Physical Review Letters	Publication Date: Mar 10, 1986
Citations: 40

Affiliation: Princeton University, Iowa State University, Ames Laboratory, Fermi National Accelerator Laboratory, University of Chicago

#Decay D0 #Upper Limits

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Abstract

As a by-product to the study of muon pairs produced by 255-GeV/c pions, data from Fermilab yield upper limits on the decay D/sup 0/..--> mu../sup +/..mu../sup -/ and on D/sup 0/-D-bar/sup 0/ mixing. An unrestricted sample of 122 630 unlike-sign muon pairs allows a 90%-C.L. (confidence level) upper limit of 1.1 x 10/sup -5/ to be placed on the branching ratio of the charm-changing neutral-current decay D/sup 0/..--> mu../sup +/..mu../sup -/. From a sample of 3973 like-sign muon pairs, the ratio r = GAMMA(D-bar/sup 0/..--> mu../sup +/X)/GAMMA(D/sup 0/..--> mu.. -x) is determined to be r<5.6 x 10/sup -3/ at 90% C.L.

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