Short-distance analysis of D-0-D-0 mixing
This is the pre-published version achieved from ArXiv. The published version is located at http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TVN-4GX1P39-4&_user=1516330&_coverDate=10%2F06%2F2005&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_acct=C000053443&_version=1&_urlVersion=0&_userid=1516330&md5=d3989ab3f9ee18a5c73eb9c4f8a284b6&searchtype=a
We study the Standard Model short-distance prediction for the mass and lifetime differences between the two neutral D meson mass eigenstates. We find that, despite αs/4π suppression, next-to-leading order (NLO) short-distance QCD corrections exceed the corresponding leading order (LO) amplitudes. For the lifetime difference, this stems from the lifting of helicity suppression of a light-quark intermediate state. We find yD is given by yNLO to a reasonable approximation but xD is greatly affected by destructive interference between xLO and xNLO. The net effect is to render yDxD6×10−7. Our NLO short-distance results, still smaller than most long-distance estimates, depend on the same two nonperturbative matrix elements of four-quark operators as in leading order.
E Golowich and AA Petrov. "Short-distance analysis of D-0-D-0 mixing" Physics Department Faculty Publication Series 625.1-2 (2005).
Available at: http://works.bepress.com/eugene_golowich/33