Using data samples with a total integrated luminosity of 20.1 fb-1 collected by the BESIII detector operating at the BEPCII collider, the cross section of the process e+e-→π+π-ψ(3686) is measured at center-of-mass energies between 4.0076 and 4.6984 GeV. The measured cross section is consistent with previous results, and with much improved precision. A fit to the measured energy-dependent cross section, which includes three Breit-Wigner functions and a nonresonant contribution, confirms the existence of the charmonium-like states Y(4220), Y(4390), and Y(4660). This is the first observation of the Y(4660) at the BESIII experiment.

Cross section measurement of e+e−→π+π−ψ(3686) from s=4.0076  GeV to 4.6984 GeV

Garzia, I.;Scodeggio, M.;
2021

Abstract

Using data samples with a total integrated luminosity of 20.1 fb-1 collected by the BESIII detector operating at the BEPCII collider, the cross section of the process e+e-→π+π-ψ(3686) is measured at center-of-mass energies between 4.0076 and 4.6984 GeV. The measured cross section is consistent with previous results, and with much improved precision. A fit to the measured energy-dependent cross section, which includes three Breit-Wigner functions and a nonresonant contribution, confirms the existence of the charmonium-like states Y(4220), Y(4390), and Y(4660). This is the first observation of the Y(4660) at the BESIII experiment.
2021
Ablikim, M.; Achasov, M.  N.; Adlarson, P.; Ahmed, S.; Albrecht, M.; Aliberti, R.; Amoroso, A.; An, M.  R.; An, Q.; Bai, X.  H.; Bai, Y.; Bakina, O.; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2506033
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