Measurement of e+ e- → φη' cross sections at center-of-mass energies from 3.508 to 4.951 GeV and search for the decay ψ(3770) → φη'

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.; 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.; Chen, H. S.

来源：Physical Review D, 2023, 108(5): 052015.

DOI：10.1103/PhysRevD.108.052015

• JONA-LASINIO MODEL
• BRANCHING FRACTION
• ANNIHILATION
• CHARMONIUM
• TOF

The cross sections of the e(+) e(-) -> phi eta' process at center-of-mass energies from 3.508 to 4.951 GeV are measured with high precision using 26.1 fb(-1) data collected with the BESIII detector operating at the BEPCII storage ring. The cross sections are of the order of a few picobarn and decrease as the center-of-mass energy increases as s(-n/2) with n = 4.35 +/- 0.14. This result is in agreement with the Nambu-Jona-Lasinio model prediction of n = 3.5 +/- 0.9. In addition, the charmless decay psi(3770) -> phi eta' is searched for by fitting the measured cross sections, yet no significant signal is observed. The upper limit of B(psi(3770) -> phi eta') at the 90% confidence level is determined to be 2.3 x 10(-5).