Measurement of the Wrong-Sign Decays D{sup 0}{yields}K{sup +}{pi}{sup -}{pi}{sup 0} and D{sup 0}{yields}K{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -}, and Search for CP Violation

Journal Article · Fri Dec 02 04:00:00 EST 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.231801· OSTI ID:20699640

Tian, X C; Ban, Y; Ying, J ^[1]; Abe, K; Gershon, T; Haba, J; Hazumi, M; Ishikawa, A; Itoh, R; Iwasaki, Y; Katayama, N; Kichimi, H; Nakazawa, H; Nishida, S; Ozaki, H; Sakai, Y; Takasaki, F; Tamai, K; Tanaka, M; Tsukamoto, T ^[2]

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1. Peking University, Beijing (China)
2. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan); and others

Using 281 fb{sup -1} of data from the Belle experiment recorded at or near the {upsilon}(4S) resonance, we have measured the rates of the ''wrong-sign'' decays D{sup 0}{yields}K{sup +}{pi}{sup -}{pi}{sup 0} and D{sup 0}{yields}K{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -} relative to those of the Cabibbo-favored decays D{sup 0}{yields}K{sup -}{pi}{sup +}{pi}{sup 0} and D{sup 0}{yields}K{sup -}{pi}{sup +}{pi}{sup +}{pi}{sup -}. These wrong-sign decays proceed via a doubly Cabibbo-suppressed amplitude or via D{sup 0}-D{sup 0} mixing; the latter has not yet been observed. We obtain R{sub WS}(K{pi}{pi}{sup 0})=[0.229{+-}0.015(stat){sub -0.009}{sup +0.013}(syst)]% and R{sub WS}(K3{pi})=[0.320{+-}0.018(stat){sub -0.013}{sup +0.018}(syst)]%. The CP asymmetries are measured to be -0.006{+-}0.053 and -0.018{+-}0.044 for the K{sup +}{pi}{sup -}{pi}{sup 0} and K{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -} final states, respectively.

• OSTI ID: 20699640
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 23 Vol. 95; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
CABIBBO ANGLE
CP INVARIANCE
D NEUTRAL MESONS
HADRONIC PARTICLE DECAY
KAONS PLUS
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS