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

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

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 tim...

Полное описание

Библиографические подробности
Главные авторы: Brandenburg, G, Ershov, A, Kim, D, Wilson, R, Bergfeld, T, Eisenstein, B, Ernst, J, Gladding, G, Gollin, G, Hans, R, Johnson, E, Karliner, I, Marsh, M, Plager, C, Sedlack, C, Selen, M, Thaler, J, Williams, J, Edwards, K, Sadoff, A, Ammar, R, Bean, A, Besson, D, Zhao, X, Anderson, S
Формат: Journal article
Язык:English
Опубликовано: 2001
Описание
Итог: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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