Measurement of the inclusive branching fraction for ψ(3686)→KS0+anything

Measurement of the inclusive branching fraction for ψ(3686)→KS0+anything

Using 5.9 pb−1 of e+e− annihilation data collected at center-of-mass energies from 3.640 to 3.701 GeV with the BESIII detector at the BEPCII Collider, we measure the observed cross sections of e+e−→KS0X (where X=anything). From a fit to these observed cross sections with the sum of continuum and ψ(3...

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Veröffentlicht in:Physics letters. B 2021-09, Vol.820, p.136576, Article 136576
Hauptverfasser: Bakina, O., Bertani, M., Bloms, J., Briere, R.A., Cao, G.F., Chang, J.F., Chang, W.L., Chen, X.R., Chen, Y.B., Cheng, W.S., Dai, X.C., Dbeyssi, A., Fava, L., Feng, C.Q., Fritsch, M., Gao, Y., Garzia, I., Gersabeck, E.M., Guo, Y.P., He, K.L., Irshad, M., Ji, X.B., Jiang, X.S., Jiao, J.B., Jin, S., Kopf, B., Lellmann, M., Li, C.H., Li, H., Li, H.J., Li, Ke, Li, W.D., Liang, H., Liao, L.Z., Libby, J., Liu, Fang, Liu, H.B., Liu, Z.Q., Lu, H.J., Lu, Y., Lu, Y.P., Luo, P.W., Luo, T., Lusso, S., Lyu, X.R., Ma, H.L., Ma, L.L., Ma, R.T., Ma, X.N., Ma, X.X., Maas, F.E., Nakhoul, S., Nefedov, Y., Ning, Z., Pacetti, S., Ping, J.L., Qi, H., Qi, M., Qi, T.Y., Qiao, C.F., Redmer, C.F., Rodin, V., Schelhaas, Y., Shi, H.C., Sun, G.X., Sun, Y.K., Sun, Y.Z., Sun, Z.T., Tang, C.J., Wang, L.L., Wang, W.H., Wang, X.L., Wang, Y., Wang, Y.F., Wang, Z., Wang, Zongyuan, Wei, D.H., Weidenkaff, P., White, D.J., Wilkinson, G., Wu, Z., Xiao, Y.J., Xing, T.Y., Xu, G.F., Xu, Y.C., Yan, W.C., Yuan, C.Z., Yuan, Y., Yue, C.X., Zhang, B.X., Zhang, J.Z., Zhang, T.J., Zhao, J., Zhao, J.Y., Zhao, J.Z., Zhao, M.G., Zhao, Y.X., Zhu, J., Zhu, S.H., Zhu, Z.A.
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Sprache:eng
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BESIII
formula omitted
Inclusive branching fraction
KS0
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Zusammenfassung:Using 5.9 pb−1 of e+e− annihilation data collected at center-of-mass energies from 3.640 to 3.701 GeV with the BESIII detector at the BEPCII Collider, we measure the observed cross sections of e+e−→KS0X (where X=anything). From a fit to these observed cross sections with the sum of continuum and ψ(3686) and J/ψ Breit-Wigner functions and considering initial state radiation and the BEPCII beam energy spread, we obtain for the first time the product of ψ(3686) leptonic width and inclusive decay branching fraction Γψ(3686)eeB(ψ(3686)→KS0X)=(373.8±6.7±20.0) eV, and assuming Γψ(3686)ee is (2.33±0.04) keV from PDG value, we measure B(ψ(3686)→KS0X)=(16.04±0.29±0.90)%, where the first uncertainty is statistical and the second is systematic.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2021.136576