Using 2.93 fb-1 of e+e- collision data taken at a center-of-mass energy of 3.773 GeV by the BESIII detector at the BEPCII, we measure the branching fractions of the singly Cabibbo-suppressed decays D→ωππ to be B(D0→ωπ+π-)=(1.33±0.16±0.12)×10-3 and B(D+→ωπ+π0)=(3.87±0.83±0.25)×10-3, where the first uncertainties are statistical and the second ones systematic. The statistical significances are 12.9σ and 7.7σ, respectively. The precision of B(D0→ωπ+π-) is improved by a factor of 2.1 over prior measurements, and B(D+→ωπ+π0) is measured for the first time. No significant signal for D0→ωπ0π0 is observed, and the upper limit on the branching fraction is B(D0→ωπ0π0)<1.10×10-3 at the 90% confidence level. The branching fractions of D→ηππ are also measured and consistent with existing results.

Measurement of singly Cabibbo-suppressed decays D→ωππ

Amoroso A.;Bianchi F.;Bortone A.;Destefanis M.;De Mori F.;Greco M.;Lavezzi L.;Maggiora M.;Marcello S.;Sosio S.;Spataro S.;
2020-01-01

Abstract

Using 2.93 fb-1 of e+e- collision data taken at a center-of-mass energy of 3.773 GeV by the BESIII detector at the BEPCII, we measure the branching fractions of the singly Cabibbo-suppressed decays D→ωππ to be B(D0→ωπ+π-)=(1.33±0.16±0.12)×10-3 and B(D+→ωπ+π0)=(3.87±0.83±0.25)×10-3, where the first uncertainties are statistical and the second ones systematic. The statistical significances are 12.9σ and 7.7σ, respectively. The precision of B(D0→ωπ+π-) is improved by a factor of 2.1 over prior measurements, and B(D+→ωπ+π0) is measured for the first time. No significant signal for D0→ωπ0π0 is observed, and the upper limit on the branching fraction is B(D0→ωπ0π0)<1.10×10-3 at the 90% confidence level. The branching fractions of D→ηππ are also measured and consistent with existing results.
2020
Inglese
Esperti anonimi
102
5
052003-1
052003-12
12
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262
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Ablikim M.; Achasov M.N.; Adlarson P.; Ahmed S.; Albrecht M.; Amoroso A.; An Q.; Anita; Bai Y.; Bakina O.; Ferroli R.B.; Balossino I.; Ban Y.; Begzsur...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1760497
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