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Comparison of D--> KS0 pi and D--> KL0 pi decay rates |
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| Authors: | He Q Insler J Muramatsu H Park C S Thorndike E H Yang F Coan T E Gao Y S Artuso M Blusk S Butt J Li J Menaa N Mountain R Nisar S Randrianarivony K Sia R Skwarnicki T Stone S Wang J C Zhang K Bonvicini G Cinabro D Dubrovin M Lincoln A Asner D M Edwards K W Briere R A Ferguson T Tatishvili G Vogel H Watkins M E Rosner J L Adam N E Alexander J P Cassel D G Duboscq J E Ehrlich R Fields L Gibbons L Gray R Gray S W Hartill D L Heltsley B K Hertz D Jones C D Kandaswamy J Kreinick D L Kuznetsov V E Mahlke-Krüger H Onyisi P U E Patterson J R Peterson D Pivarski J Riley D Ryd A Sadoff A J Schwarthoff H |
| Institution: | University of Rochester, Rochester, NY 14627, USA. |
| Abstract: | We present measurements of D--> KS0 pi and D--> KL0 pi branching fractions using 281 pb(-1) of psi(3770) data at the CLEO-c experiment. We find that B(D0--> KS0 pi 0) is larger than B(D0--> KL0 pi 0), with an asymmetry of R(D0)=0.108+/-0.025+/-0.024. For B(D+--> KS0 pi+) and B(D+--> KL0 pi+), we observe no measurable difference; the asymmetry is R(D+)=0.022+/-0.016+/-0.018. The D0 asymmetry is consistent with the value based on the U-spin prediction A(D0--> K0 pi 0)/A(D0--> K0 pi 0)=-tan2 theta C, where theta C is the Cabibbo angle. |
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