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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Cilt Başlığı
Özet
Using ethorne-collision data collected with the BESIII detector at the BEPCII collider corresponding to an integrated luminosity of 5.2 fb(-1) at center-of-mass energies (root s) from 4.009 to 4.600 GeV, the process e(+)e(-) -> pi(0)pi(0)psi(3686) is studied for the first time. The corresponding Born cross sections are measured and found to be half of those of the reaction e(+)e(-) -> pi(0)pi(0)psi(3686). This is consistent with the expectation from isospin symmetry. Furthermore, the Dalitz plots for pi(0)pi(0)psi(3686) are accordant with those of pi(0)pi(0)psi(3686) at all energy points, and a neutral analog to the structure in pi(+/-)psi(3686) around 4040 MeV/c(2) first observed at root s = 4.416 GeV is observed in the isospin neutral mode at the same energy.
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Konusu
Charm, Decay, Science & technology, Physical sciences, Astronomy & astrophysics, Physics, particles & fields, Astronomy & astrophysics, Physics