Comparison of D--> KS0 pi and D--> KL0 pi decay rates

• Published in: Physical review letters Vol. 100; no. 9; p. 091801
• Main 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, 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
• Format: Journal Article
• Language: English
• Published: United States 07.03.2008
• ISSN: 0031-9007

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.