Study of D → K/Π+νe and Measurement of ????Vcs???? and ????Vcd???? at CLEO-c

Details Study of D → K/Π+νe and Measurement of ????Vcs???? and ????Vcd???? at CLEO-c Study of D → K/Π+νe and Measurement of ????Vcs???? and ????Vcd???? at CLEO-c

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009fuin.conf..408x&link_type=abstract

FUNDAMENTAL INTERACTIONS . Proceedings of the 23rd Lake Louise Winter Institute 2008 . Held 18 - 23 February 2008 in Lake Louise

Computer Science

Scientific paper

Using a 281 pb-1 data sample comprising 1.8 million D/line D mesons collected at the ψ(3770) with the CLEO-c detector, we measure absolute branching fractions as a function of q2, the invariant mass of the e+νe pair, for D0 → K-e+νe, D0 → π- e+νe, D^ + -> KS0 e^ + ν e and D+ → π0e+νe. We measure the absolute magnitudes of the form factors f_ + K (0) and f_ + π (0). Using unquenched Lattice QCD calculations of the form factor magnitudes, we extract the CKM matrix elements |Vcs| and |Vcd|. Our measurement of |Vcs| is the most precise direct determination to date. An extension of the analysis with the 818 pb-1 complete data set is also discussed.

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