Comparison of D--> KS0 pi and D--> KL0 pi decay rates.
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,Shi X,Stroiney S,Sun W M,Wilksen T,Weinberger M,Athar S B,Patel R,Potlia V,Yelton J,Rubin P,Cawlfield C,Eisenstein B I,Karliner I,Kim D,Lowrey N,Naik P,Selen M,White E J,Wiss J,Mitchell R E,Shepherd M R,Besson D,Pedlar T K,Cronin-Hennessy D,Gao K Y,Hietala J,Kubota Y,Klein T,Lang B W,Poling R,Scott A W,Smith A,Zweber P,Dobbs S,Metreveli Z,Seth K K,Tomaradze A,Ernst J,Ecklund K M,Severini H,Love W,Savinov V,Aquines O,Li Z,Lopez A,Mehrabyan S,Mendez H,Ramirez J,Huang G S,Miller D H,Pavlunin V,Sanghi B,Shipsey I P J,Xin B,Adams G S,Anderson M,Cummings J P,Danko I,Hu D,Moziak B,Napolitano J,Null Null
Physical review letters（2008）
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摘要
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.
