Measurement of e+e-→pK- Λ plus c.c. cross sections between 4.009 GeV and 4.951 GeV

作者：Ablikim, M.; Achasov, M. N.; Adlarson, P.; Ai, X. C.; Aliberti, R.; Amoroso, A.; An, M. R.; An, Q.; Bai, Y.; Bakina, O.; Balossino, I.; Ban, Y.; Batozskaya, V.; Begzsuren, K.; Berger, N.; Berlowski, M.; Bertani, M.; Bettoni, D.; Bianchi, F.; Bianco, E.; 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, T. T.; Chang, W. L.; Che, G. R.; Chelkov, G.; Chen, C.; Chen, Chao; Chen, G.

来源：JOURNAL OF HIGH ENERGY PHYSICS, 2023, (12): 27.

DOI：10.1007/JHEP12(2023)027

• e(+)-e(-) Experiments
• Quarkonium

Using e(+)e(-) collision datasets corresponding to a total integrated luminosity of 21.7 fb(-1) collected with the BESIII detector at the BEPCII collider at center-of-mass energies ranging from 4.009 GeV to 4.951 GeV, the energy-dependent cross sections of e(+)e-->-Lambda<overline>+. are measured for the first time. By fitting these energy-dependent cross sections, we search for the excited psi states psi(4160) and psi(4415), and the vector charmonium-like states psi(4230), psi(4360), and psi(4660). No evidence for these is observed and the upper limits on the branching fractions of these states decaying into -Lambda<overline>+.. are set at the 90% confidence level.