Amplitude analysis and branching fraction measurement of the decay Ds+ → K+π+π-

Ablikim, M.; Achasov, M. N.; Adlarson, P.; 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.; Batozskaya, V; Becker, D.; Begzsuren, K.; Berger, N.; Bertani, M.; Bettoni, D.; Bianchi, F.; Bloms, J.; Bortone, A.; Boyko, I; Briere, R. A.; Brueggemann, A.; Cai, H.; Cai, X.; Calcaterra, A.; Cao, G. F.; Cao, N.; Cetin, S. A.; Chang, J. F.; Chang, W. L.; Chelkov, G.; Chen, C.; Chen, G.; Chen, H. S.; Chen, M. L.

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摘要

Using 6.32 fb(-1) of e(+)e(-) collision data collected at the center-of-mass energies between 4.178 and 4.226 GeV with the BESIII detector, we perform an amplitude analysis of the decay D-s(+) -> K+pi(+)pi(-) and determine the amplitudes of the various intermediate states. The absolute branching fraction of D-s(+) -> K+pi(+)pi(-) is measured to be (6.11 +/- 0 .18(stat.) +/- 0.11(syst.)) x 10(-3). The branching fractions of the dominant intermediate processes D-s(+) -> K+C+rho(0), rho(0) -> pi(+)pi(-) and D-s(+) -> K*(892)(0)pi(+), K*(892)(0) -> K+pi(-) are determined to be (1.96 +/- 0.19(stat.) +/- 0.23(syst.)) x 10(-3) and (1.85 +/- 0.12(stat.) +/- 0.13(syst.)) x 10(-3), respectively. The intermediate resonances f(0)(500), f(0)(980), and f(0)(1370) are observed for the first time in this channel.

关键词

Branching fraction Charm Physics e(+)-e(-) Experiments Particle and Resonance Production