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.File | Dimensione | Formato | |
---|---|---|---|
PhysRevD.97.032008.pdf
accesso aperto
Descrizione: Full text editoriale
Tipologia:
Full text (versione editoriale)
Licenza:
Creative commons
Dimensione
422.32 kB
Formato
Adobe PDF
|
422.32 kB | Adobe PDF | Visualizza/Apri |
I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.