Measurement of the cross section of e+e-→ ηπ+π- at center-of-mass energies from 3.872 GeV to 4.700 GeV

作者：Ablikim, M.; Achasov, M. N.; Adlarson, P.; Albrecht, M.; Aliberti, R.; Amoroso, A.; An, M. R.; An, Q.; Bai, X. H.; Bai, Y.; Bakina, O.; Ferroli, R. Baldini; Balossino, I; Ban, Y.; Batozskaya, V; Becker, D.; Begzsuren, K.; Berger, N.; Bertani, M.; Bettoni, D.; Bianchi, F.; Bloms, J.; Bortone, A.; Boyko, I; Briere, R. A.; Brueggemann, A.; Cai, H.; Cai, X.; Calcaterra, A.; Cao, G. F.; Cao, N.; Cetin, S. A.; Chang, J. F.; Chang, W. L.; Chelkov, G.; Chen, C.; Chen, Chao; Chen, G.; Chen, H. S.

来源：JOURNAL OF HIGH ENERGY PHYSICS, 2022, (12): 153.

DOI：10.1007/JHEP12(2022)153

• Charm Physics
• e(+)-e(-) Experiments

Using data samples with an integrated luminosity of 19 fb(-1) at twenty-eight center-of-mass energies from 3.872 GeV to 4.700 GeV collected with the BESIII detector at the BEPCII electron-positron collider, the process e(+)e(-) -> eta(+)pi(-) and the intermediate process e(+)e(-) -> eta rho(0) are studied for the first time. The Born cross sections are measured. No significant resonance structure is observed in the cross section lineshape.