Using a data sample collected with the BESIII detector operating at the BEPCII storage ring at a center-of-mass energy of s=4.600 GeV, we search for the production of e+e-→φχc0,1,2. A search is also performed for the charmonium-like state X(4140) in the radiative transition e+e-→γX(4140) with X(4140) subsequently decaying into φJ/ψ. The processes e+e-→φχc1 and φχc2 are observed for the first time, each with a statistical significance of more than 10σ, and the Born cross sections are measured to be (4.2-1.0+1.7±0.3) and (6.7-1.7+3.4±0.5) pb, respectively, where the first uncertainties are statistical and the second systematic. No significant signals are observed for e+e-→φχc0 and e+e-→γX(4140) and upper limits on the Born cross sections at 90% C.L. are provided at s=4.600 GeV.

Observation of e + e - → φ χ c 1 and φ χ c 2 at s = 4.600 GeV

Farinelli, R.;Garzia, I.;Mezzadri, G.;
2018

Abstract

Using a data sample collected with the BESIII detector operating at the BEPCII storage ring at a center-of-mass energy of s=4.600 GeV, we search for the production of e+e-→φχc0,1,2. A search is also performed for the charmonium-like state X(4140) in the radiative transition e+e-→γX(4140) with X(4140) subsequently decaying into φJ/ψ. The processes e+e-→φχc1 and φχc2 are observed for the first time, each with a statistical significance of more than 10σ, and the Born cross sections are measured to be (4.2-1.0+1.7±0.3) and (6.7-1.7+3.4±0.5) pb, respectively, where the first uncertainties are statistical and the second systematic. No significant signals are observed for e+e-→φχc0 and e+e-→γX(4140) and upper limits on the Born cross sections at 90% C.L. are provided at s=4.600 GeV.
2018
Ablikim, M.; Achasov, M. N.; Ahmed, S.; Albrecht, M.; Amoroso, A.; An, F. F.; An, Q.; Bai, J. Z.; Bai, Y.; Bakina, O.; Baldini Ferroli, R.; Ban, Y.; B...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2398090
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