Measurements of the branching fractions of semileptonic D^+_s decays via e^+e^-→ D_s^+D_s^-

BESIII Collaboration,M. Ablikim,M. N. Achasov,P. Adlarson, O. Afedulidis,X. C. Ai,R. Aliberti,A. Amoroso,Q. An, Y. Bai,O. Bakina,I. Balossino,Y. Ban, H. -R. Bao,V. Batozskaya,K. Begzsuren,N. Berger,M. Berlowski,M. Bertani,D. Bettoni,F. Bianchi,E. Bianco,A. Bortone,I. Boyko,R. A. Briere,A. Brueggemann,H. Cai, X. Cai,A. Calcaterra,G. F. Cao,N. Cao,S. A. Cetin,J. F. Chang,G. R. Che,G. Chelkov,C. Chen,C. H. Chen,Chao Chen,G. Chen,H. S. Chen,H. Y. Chen,M. L. Chen,S. J. Chen,S. L. Chen,S. M. Chen,T. Chen,X. R. Chen,X. T. Chen,Y. B. Chen,Y. Q. Chen,Z. J. Chen,Z. Y. Chen,S. K. Choi,G. Cibinetto,F. Cossio,J. J. Cui,H. L. Dai,J. P. Dai,A. Dbeyssi,R. E. de Boer,D. Dedovich, C. Q. Deng,Z. Y. Deng,A. Denig,I. Denysenko,M. Destefanis,F. De Mori,B. Ding,X. X. Ding,Y. Ding, Y. Ding,J. Dong,L. Y. Dong,M. Y. Dong,X. Dong, M. C. Du,S. X. Du, Y. Y. Duan,Z. H. Duan,P. Egorov, Y. H. Fan,J. Fang, J. Fang,S. S. Fang,W. X. Fang,Y. Fang, Y. Q. Fang,R. Farinelli,L. Fava,F. Feldbauer,G. Felici,C. Q. Feng,J. H. 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arxiv（2024）

Cited 0|Views14

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Abstract

We measure the absolute branching fractions of semileptonic D^+_s decays via the e^+e^-→ D_s^*+D_s^*- process using e^+e^- collision data corresponding to an integrated luminosity of 10.64 fb^-1 collected by the BESIII detector at center-of-mass energies between 4.237 and 4.699 GeV. The branching fractions are ℬ(D_s^+→η e^+ν_e)=(2.35±0.11_ stat± 0.10_ syst)%, ℬ(D_s^+→η^' e^+ν_e)=(0.82±0.09_ stat± 0.04_ syst)%, ℬ(D_s^+→ϕ e^+ν_e)=(2.21±0.16_ stat± 0.11_ syst)%, ℬ(D_s^+→ f_0(980) e^+ν_e,f_0(980)→π^+π^-)=(0.15±0.02_ stat± 0.01_ syst)%, ℬ(D_s^+→ K^0 e^+ν_e)=(0.24±0.04_ stat± 0.01_ syst)%, and ℬ(D_s^+→ K^*0 e^+ν_e)=(0.19±0.03_ stat± 0.01_ syst)%. These results are consistent with those measured via the e^+e^-→ D_s^*±D_s^∓ process by BESIII and CLEO. The hadronic transition form factors D^+_s→η e^+ν_e, D^+_s→η^' e^+ν_e, and D^+_s→ K^0 e^+ν_e at four-momentum transfer squared q^2 = 0 are determined to be f^η_+(0) = 0.482 ± 0.011_ stat± 0.009_ syst±0.004_ input, f^η^'_+(0) = 0.562 ± 0.031_ stat± 0.014_ syst±0.003_ input, and f^K^0_+(0) = 0.624 ± 0.052_ stat± 0.013_ syst±0.002_ input.

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Measurements of the branching fractions of semileptonic D^+_s decays via e^+e^-→ D_s^*+D_s^*-

Measurements of the branching fractions of semileptonic D^+_s decays via e^+e^-→ D_s^+D_s^-