The energy-dependent cross section for e+e- -> eta psi(2S) is measured at 18 center of mass energies from 4.288 to 4.951 GeV using the BESIII detector. Using the same data samples, we also perform the first search for the reaction e+e- -> eta Xtilde(3872), but no evidence is found for the Xtilde(3872) in the pi+pi- J/psi. mass distribution. At each of the 18 center of mass energies, upper limits at the 90% confidence level on the cross section for e+e- -> eta psi(2S) and on the product of the e+e- -> eta Xtilde(3872) cross section with the branching fraction of Xtilde(3872) -> pi+pi-J/psi are reported.

Cross section measurement of e+e- →ηψ (2S) and search for e+e- →η X (3872)

Amoroso, A.;Bianchi, F.;Destefanis, M.;De Mori, F.;Greco, M.;Maggiora, M.;Marcello, S.;Sosio, S.;Spataro, S.;
2024-01-01

Abstract

The energy-dependent cross section for e+e- -> eta psi(2S) is measured at 18 center of mass energies from 4.288 to 4.951 GeV using the BESIII detector. Using the same data samples, we also perform the first search for the reaction e+e- -> eta Xtilde(3872), but no evidence is found for the Xtilde(3872) in the pi+pi- J/psi. mass distribution. At each of the 18 center of mass energies, upper limits at the 90% confidence level on the cross section for e+e- -> eta psi(2S) and on the product of the e+e- -> eta Xtilde(3872) cross section with the branching fraction of Xtilde(3872) -> pi+pi-J/psi are reported.
2024
109
11
112004-1
112004-17
charmonium, Xtilde(3872)
Ablikim, M.; Achasov, M. N.; Adlarson, P.; Afedulidis, O.; Ai, X. C.; Aliberti, R.; Amoroso, A.; An, Q.; Bai, Y.; Bakina, O.; Balossino, I.; Ban, Y.; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/2027978
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