Amplitude analysis and branching fraction measurement of D-s(+) -> K-K+pi(+)pi(+)pi(-)
Citation
Ablikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Aliberti, R., ... & Koch, L. (2022). Amplitude analysis and branching-fraction measurement of D s+ $${\mathrm {D}} _ {\mathrm {s}}^{+} $$→ π+ π0η′. Journal of High Energy Physics, 2022(4), 1-26.Abstract
Using e+e− annihilation data corresponding to a total integrated luminosity of 6.32 fb−1 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 Ds+ → K−K+π+π+π− and determine the relative fractions and phases of different intermediate processes. Absolute branching fraction of Ds+→ K−K+π+π+π− decay is measured to be (6.60 ± 0.47stat.± 0.38syst.) × 10−3. The dominant intermediate process is Ds+→ a1(1260)+ϕ, ϕ → K−K+, a1(1260)+→ ρπ+, ρ → π+π−, with a branching fraction of (5.15 ± 0.41stat.± 0.32syst.) × 10−3. [Figure not available: see fulltext.] © 2022, The Author(s).
