Updated Search for the Flavor-Changing Neutral-Current Decay $D^0 \to \mu^+ \mu^-$Aaltonen, T.perPhys., /Helsinki Inst. ofperAlvarez Gonzalez, B.perPhys., /Oviedo U. /Cantabria Inst. ofperAmerio, S.per/INFN, PaduaperAmidei, D.perU., /MichiganperAnastassov, A.perU., /NorthwesternperAnnovi, A.per/FrascatiperAntos, J.perU., /ComeniusperApollinari, G.per/FermilabperAppel, J. A.per/FermilabperApresyan, A.perU., /PurdueperArisawa, T.per/Waseda U. /Dubna, JINRperUnited States. Department of Energy.orgUSDOEFermi National Accelerator LaboratoryBatavia, IllinoisFermi National Accelerator Laboratory (FNAL), Batavia, IL2010-08-01engWe report on a search for the flavor-changing neutral-current decay D{sup 0} {yields} {mu}{sup +}{mu}{sup -} in p{bar p} collisions at {radical}s = 1.96TeV using 360 pb{sup -1} of integrated luminosity collected by the CDF II detector at the Fermilab Tevatron collider. A displaced vertex trigger selects long-lived D{sup 0} candidates in the {mu}{sup +}{mu}{sup -}, {pi}{sup +}{pi}{sup -}, and K{sup -}{pi}{sup +} decay modes. We use the Cabibbo-favored D{sup 0} {yields} K{sup -}{pi}{sup +} channel to optimize the selection criteria in an unbiased manner, and the kinematically similar D{sup 0} {yields} {pi}{sup +}{pi}{sup -} channel for normalization. We set an upper limit on the branching fraction {Beta}(D{sup 0} {yields} {mu}{sup +}{mu}{sup -}) < 2.1 x 10{sup -7} (3.0 x 10{sup -7}) at the 90% (95%) confidence level.8 pagesDecayFermilab Tevatron72 Physics Of Elementary Particles And FieldsFermilab Collider DetectorLuminosity Experiment-HepExperiment-HepOSTIUNTGDtext_articletextFERMILAB-PUB-10-337-EAC02-07CH11359986978
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ark:/67531/metadc1015498
2017-10-14, 08:36:47
mmilburn
2020-12-15, 21:12:39
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