Using an e+e- A nnihilation data sample corresponding to an integrated luminosity of 2.93 fb-1 collected at the center-of-mass energy of 3.773 GeV with the BESIII detector, we measure the absolute branching fractions of D+→ηηπ+, D+→ηπ+π0, and D0→ηπ+π-to be (2.96±0.24±0.10)×10-3, (2.23±0.15±0.10)×10-3, and (1.20±0.07±0.04)×10-3, respectively, where the first uncertainties are statistical and the second ones are systematic. The D+→ηηπ+ decay is observed for the first time, and the branching fractions of D+(0)→ηπ+π0(-) are measured with much improved precision. In addition we test for CP asymmetries in the separated charge-conjugate branching fractions; no evidence of CP violation is found.

Observation of D+ →ηηπ+ and improved measurement of D0 (+) →ηπ+π-(0)

Garzia I.;Savrie M.;
2020

Abstract

Using an e+e- A nnihilation data sample corresponding to an integrated luminosity of 2.93 fb-1 collected at the center-of-mass energy of 3.773 GeV with the BESIII detector, we measure the absolute branching fractions of D+→ηηπ+, D+→ηπ+π0, and D0→ηπ+π-to be (2.96±0.24±0.10)×10-3, (2.23±0.15±0.10)×10-3, and (1.20±0.07±0.04)×10-3, respectively, where the first uncertainties are statistical and the second ones are systematic. The D+→ηηπ+ decay is observed for the first time, and the branching fractions of D+(0)→ηπ+π0(-) are measured with much improved precision. In addition we test for CP asymmetries in the separated charge-conjugate branching fractions; no evidence of CP violation is found.
2020
Ablikim, M.; Achasov, M. N.; Adlarson, P.; Ahmed, S.; Albrecht, M.; Alekseev, M.; Amoroso, A.; An, Q.; Anita, ; Bai, Y.; Bakina, O.; Ferroli, R. B.; B...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2472456
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