Yayın: Measurement of e+e- → π0π0ψ(3686) at √s from 4.009 to 4.600 GeV and observation of a neutral charmoniumlike structure
Tarih
Kurum Yazarları
Tapan, İlhan
Yazarlar
Achasov, M. N.
Ahmed, S.
Albrecht, M.
Amoroso, A.
An, F. F.
An, Q.
Bai, J. Z.
Bakina, O.
Ferroli, R. Baldini
Ban, Y.
Danışman
Dil
Türü
Yayıncı:
Amer Physical Soc
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Özet
We investigate the process e(+)e(-) -> K (K) over barJ/psi at center-of-mass energies from 4.189 to 4.600 GeV using 4.7 fb(-1) of data collected by the BESIII detector at the BEPCII collider. The Born cross sections for the reactions e(+)e(-) -> K(+)K(-)J/psi and K(S)(0)K(S)(0)J/psi are measured as a function of center-of-mass energy. The energy dependence of the cross section for e(+)e(-) -> K(+)K(-)J/psi is shown to differ from that for pi(+)pi(-)J/psi in the region around the Y(4260). In addition, there is evidence for a structure around 4.5 GeV in the e(+)e(-) -> K(+)K(-)J/psi cross section that is not present in pi(+)pi(-)J/psi.
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Decay, Science & technology, Physical sciences, Astronomy & astrophysics, Physics, particles & fields, Astronomy & astrophysics, Physics