Observation of e<sup>+</sup>e<sup>-</sup> → D<inf>s</inf><sup>+</sup>D(∗)<sup>0</sup> K<sup>-</sup> and study of the P-wave Ds mesons

Date Issued
01-01-2019
Author(s)
Ablikim, M.
Achasov, M. N.
Ahmed, S.
Albrecht, M.
Alekseev, M.
Amoroso, A.
An, F. F.
An, Q.
Bai, Y.
Bakina, O.
Ferroli, R. Baldini
Ban, Y.
Begzsuren, K.
Bennett, D. W.
Bennett, J. V.
Berger, N.
Bertani, M.
Bettoni, D.
Bianchi, F.
Boyko, I.
Briere, R. A.
Cai, H.
Cai, X.
Calcaterra, A.
Cao, G. F.
Cetin, S. A.
Chai, J.
Chang, J. F.
Chang, W. L.
Chelkov, G.
Chen, G.
Chen, H. S.
Chen, J. C.
Chen, M. L.
Chen, S. J.
Chen, Y. B.
Cheng, W. S.
Cibinetto, G.
Cossio, F.
Dai, H. L.
Dai, J. P.
Dbeyssi, A.
Dedovich, D.
Deng, Z. Y.
Denig, A.
Denysenko, I.
Destefanis, M.
Mori, F. De
Ding, Y.
Dong, C.
Dong, J.
Dong, L. Y.
Dong, M. Y.
Dou, Z. L.
Du, S. X.
Fan, J. Z.
Fang, J.
Fang, S. S.
Fang, Y.
Farinelli, R.
Fava, L.
Feldbauer, F.
Felici, G.
Feng, C. Q.
Fritsch, M.
Fu, C. D.
Fu, Y.
Gao, Q.
Gao, X. L.
Gao, Y. N.
Gao, Y. G.
Gao, Z.
Garillon, B.
Garzia, I.
Gilman, A.
Goetzen, K.
Gong, L.
Gong, W. X.
Gradl, W.
Greco, M.
Gu, L. M.
Gu, M. H.
Gu, S.
Gu, Y. T.
Guo, A. Q.
Guo, L. B.
Guo, R. P.
Guo, Y. P.
Guskov, A.
Haddadi, Z.
Han, S.
Hao, X. Q.
Harris, F. A.
He, K. L.
Heinsius, F. H.
Held, T.
Heng, Y. K.
Hou, Z. L.
Hu, H. M.
Hu, J. F.
DOI
Abstract
Studies of e+e- → Ds+D(∗)0 K- and the -wave charmed-strange mesons are performed based on an e+e- collision data sample corresponding to an integrated luminosity of 567 pb-1 collected with the BESIII detector at √s = 4.600 GeV. The processes of e+e- → Ds+D(∗)0 K- and Ds+D(∗)0 K- are observed for the first time and are found to be dominated by the modes Ds+ Ds1 (2536)- and Ds+ Ds2∗ (2573)-, respectively. The Born cross sections are measured to be σB (e+e- → Ds+D(∗)0 K-) = (10.1 ± 2.3 ± 0.8) pb and σB (e+e- → Ds+D(∗)0 K-) = (19.4 ± 2.3 ± 1.6) pb, and the products of Born cross section and the decay branching fraction are measured to be σB (e+e- → Ds+Ds1(2536)- + c.c.). ℬ(Ds1(2536)- → D0∗ K-) = (7.5 ± 1.8 ± 0.7) pb and σB(e+e- → Ds+Ds2∗(2573)- + c.c.). ℬ(D∗s2 (2573)- → D0K-) = (19.7 ± 2.9 ± 2.0) pb. For the Ds1(2536)-1 and D∗s2 (2573)- mesons, the masses and widths are measured to be M(Ds1(2536)-1) = (2537.7 ± 0.5 ± 3.1) MeV/c2, λ(D∗s2(2573)-1) = (17.2 ± 3.6 ± 1.1) MeV. The spin-parity of the D∗s2 (2573)- meson is determined to be Jp = 2+. In addition, the processes e+e- → Ds+D(∗)0 K- are searched for using the data samples taken at four (two) center-of-mass energies between 4.416 (4.527) and 4.575 GeV, and upper limits at the 90% confidence level on the cross sections are determined.
Volume
43
Subjects