Using 6.32 fb(-1) of e(+)e(-) collision data recorded by the BESIII detector at center-of-mass energies between 4.178 to 4.226 GeV, we present the first measurement of the decay D-s(+) -> f(0)(980)e(+)nu(e), f(0)(980) -> pi(0)pi(0). The product branching fraction of D-s(+) -> f(0)(980)e(+)nu(e), f(0)(980) -> pi(0)pi(0) is measured to be (7.9 +/- 1.4(stat) +/- 0.4(syst)) x 10(-4), with a statistical significance of 7.8 sigma. Furthermore, the upper limits on the product branching fractions of D-s(+) -> f(0)(500)e(+)nu(e) with f(0)(500) -> pi(0)pi(0) and the branching fraction of D-s(+) -> K(S)(0)K(S)(0)e(+)nu(e) are set to be 7.3 x 10(-4) and 3.8 x 10(-4) at 90% confidence level, respectively. Our results provide valuable inputs to the understanding of the structures of light scalar mesons.

Study of light scalar mesons through Ds+ →π0π0e+νe and KS0 KS0 e+νe decays

I. Garzia;
2022

Abstract

Using 6.32 fb(-1) of e(+)e(-) collision data recorded by the BESIII detector at center-of-mass energies between 4.178 to 4.226 GeV, we present the first measurement of the decay D-s(+) -> f(0)(980)e(+)nu(e), f(0)(980) -> pi(0)pi(0). The product branching fraction of D-s(+) -> f(0)(980)e(+)nu(e), f(0)(980) -> pi(0)pi(0) is measured to be (7.9 +/- 1.4(stat) +/- 0.4(syst)) x 10(-4), with a statistical significance of 7.8 sigma. Furthermore, the upper limits on the product branching fractions of D-s(+) -> f(0)(500)e(+)nu(e) with f(0)(500) -> pi(0)pi(0) and the branching fraction of D-s(+) -> K(S)(0)K(S)(0)e(+)nu(e) are set to be 7.3 x 10(-4) and 3.8 x 10(-4) at 90% confidence level, respectively. Our results provide valuable inputs to the understanding of the structures of light scalar mesons.
2022
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...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2501376
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