Using data samples collected at center-of-mass energies of √s = 4.009, 4.230, 4.260, and 4.360 GeV with the BESIII detector operating at the BEPCII collider, we perform a search for the process e+e− → γχcJ (J=0, 1, 2) and find evidence for e+e− → γχc1 and e+e− → γχc2 with statistical significances of 3.0σ and 3.4σ, respectively. The Born cross sections σB(e+e− → γχcJ), as well as their upper limits at the 90% confidence level (C.L.) are determined at each center-of-mass energy.

Evidence for e+e- →γχc1,2 at center-of-mass energies from 4.009 to 4.360 GeV

AMOROSO, Antonio;BIANCHI, Fabrizio;DESTEFANIS, Marco Giovanni Maria;DE MORI, FRANCESCA;GRECO, Michela;HU, Jifeng;MAGGIORA, MARCO;MARCELLO, Simonetta;SOSIO, Stefano;SPATARO, STEFANO GIOVANNI;
2015-01-01

Abstract

Using data samples collected at center-of-mass energies of √s = 4.009, 4.230, 4.260, and 4.360 GeV with the BESIII detector operating at the BEPCII collider, we perform a search for the process e+e− → γχcJ (J=0, 1, 2) and find evidence for e+e− → γχc1 and e+e− → γχc2 with statistical significances of 3.0σ and 3.4σ, respectively. The Born cross sections σB(e+e− → γχcJ), as well as their upper limits at the 90% confidence level (C.L.) are determined at each center-of-mass energy.
2015
39
4
041001-1
041001-9
http://iopscience.iop.org/1674-1137/39/4/041001/pdf/1674-1137_39_4_041001.pdf
decays of hadronic; electron-positron collisions; hadron production by; Heavy quarkonia; Nuclear and High Energy Physics; Astronomy and Astrophysics; Instrumentation
Ablikim, M.; Achasov, M.N.; Ai, X.C.; Albayrak, O.; Albrecht, M.; Ambrose, D.J.; Amoroso, A.; An, F.F.; An, Q.; Bai, J.Z.; Baldini Ferroli, R.; Ban, Y...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1571674
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