Study of the decay D+ → K*(892)+ KS0 in D+ → K+KS0π0

Ablikim, M.; Achasov, M. N.; Adlarson, P.; Ahmed, S.; Albrecht, M.; Aliberti, R.; Amoroso, A.; An, M. R.; An, Q.; Bai, X. H.; Bai, Y.; Bakina, O.; Ferroli, R. Baldini; Balossino, I; Ban, Y.; Begzsuren, K.; Berger, N.; Bertani, M.; Bettoni, D.; Bianchi, F.; Bloms, J.; Bortone, A.; Boyko, I; Briere, R. A.; Cai, H.; Cai, X.; Calcaterra, A.; Cao, G. F.; Cao, N.; Cetin, S. A.; Chang, J. F.; Chang, W. L.; Chelkov, G.; Chen, D. Y.; Chen, G.; Chen, H. S.; Chen, M. L.; Chen, S. J.; Chen, X. R.

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摘要

Based on an e(+)e(-) collision data sample corresponding to an integrated luminosity of 2.93 fb(-1) collected with the BESIII detector at root s = 3.773 GeV, the first amplitude analysis of the singly Cabibbo-suppressed decay D+ -> (K+KS0)pi(0) is performed. From the amplitude analysis, the K* (892)(+) K-S(0) component is found to be dominant with a fraction of (57.1 +/- 2.6 +/- 4.2)%, where the first uncertainty is statistical and the second systematic. In combination with the absolute branching fraction B(D+ -> K+ K-S(0)pi(0)) measured by BESIII, we obtain B(D+ -> K* (892)+K-S(0)) = (8.69 +/- 0.40 +/- 0.64 +/- 0.51) x 10(-3), where the third uncertainty is due to the branching fraction B(D+ -> (K+KS0)pi(0)). The precision of this result is significantly improved compared to the previous measurement. This result also differs from most of theoretical predictions by about 4 sigma, which may help to improve the understanding of the dynamics behind.

摘要

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