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. 2001 Aug 13;87(7):071802.
doi: 10.1103/PhysRevLett.87.071802. Epub 2001 Jul 26.

Rate measurement of D(0)-->K+pi(-)pi(0) and constraints on D(0) -- D(0) mixing

G Brandenburg  1 , A Ershov, D Y Kim, R Wilson, T Bergfeld, B I Eisenstein, J Ernst, G E Gladding, G D Gollin, R M Hans, E Johnson, I Karliner, M A Marsh, C Plager, C Sedlack, M Selen, J J Thaler, J Williams, K W Edwards, A J Sadoff, R Ammar, A Bean, D Besson, X Zhao, S Anderson, V V Frolov, Y Kubota, S J Lee, R Poling, A Smith, C J Stepaniak, J Urheim, S Ahmed, M S Alam, S B Athar, L Jian, L Ling, M Saleem, S Timm, F Wappler, A Anastassov, E Eckhart, K K Gan, C Gwon, T Hart, K Honscheid, D Hufnagel, H Kagan, R Kass, T K Pedlar, J B Thayer, E von Toerne, M M Zoeller, S J Richichi, H Severini, P Skubic, A Undrus, V Savinov, S Chen, J W Hinson, J Lee, D H Miller, E I Shibata, I P Shipsey, V Pavlunin, D Cronin-Hennessy, A L Lyon, E H Thorndike, T E Coan, V Fadeyev, Y S Gao, Y Maravin, I Narsky, R Stroynowski, J Ye, T Wlodek, M Artuso, K Benslama, C Boulahouache, K Bukin, E Dambasuren, G Majumder, R Mountain, T Skwarnicki, S Stone, J C Wang, A Wolf, S Kopp, M Kostin, A H Mahmood, S E Csorna, I Danko, K W McLean, Z Xu, R Godang, G Bonvicini, D Cinabro, M Dubrovin, S McGee, G J Zhou, A Bornheim, E Lipeles, S P Pappas, A Shapiro, W M Sun, A J Weinstein, D E Jaffe, R Mahapatra, G Masek, H P Paar, D M Asner, A Eppich, T S Hill, R J Morrison, H N Nelson, R A Briere, G P Chen, T Ferguson, H Vogel, J P Alexander, C Bebek, B E Berger, K Berkelman, F Blanc, V Boisvert, D G Cassel, P S Drell, J E Duboscq, K M Ecklund, R Ehrlich, P Gaidarev, L Gibbons, B Gittelman, S W Gray, D L Hartill, B K Heltsley, L Hsu, C D Jones, J Kandaswamy, D L Kreinick, M Lohner, A Magerkurth, T O Meyer, N B Mistry, E Nordberg, M Palmer, J R Patterson, D Peterson, D Riley, A Romano, H Schwarthoff, J G Thayer, D Urner, B Valant-Spaight, G Viehhauser, A Warburton, P Avery, C Prescott, A I Rubiera, H Stoeck, J Yelton; CLEO Collaboration
Affiliations

Rate measurement of D(0)-->K+pi(-)pi(0) and constraints on D(0) -- D(0) mixing

G Brandenburg et al. Phys Rev Lett. .

Abstract

We present an observation and time-integrated rate measurement of the decay D(0)-->K(+)pi(-)pi(0) produced in 9 fb(-1) of e(+)e(-) collisions near the Upsilon(4S) resonance. The signal is inconsistent with an upward fluctuation of the background by 4.9 standard deviations. We measured the time-integrated rate of D(0)-->K(+)pi(-)pi(0) normalized to the rate of D(0)-->K(+)pi(-)pi(0) to be 0.0043(+0.0011)(-0.0010) (stat)+/-0.0007 (syst). This decay can be produced by doubly Cabibbo-suppressed decays or by the D(0) evolving into a D(0) through mixing, followed by a Cabibbo-favored decay to K(+)pi(-)pi(0). We also found the CP asymmetry A = (9(+25)(-22))% be consistent with zero.

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