Evidence for e+e-→γηc (1S) at center-of-mass energies between 4.01 and 4.60 GeV

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Evidence for e+e-→γηc (1S) at center-of-mass energies between 4.01 and 4.60 GeV	347 KB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1103/PhysRevD.96.051101

Title: Evidence for e+e-→γηc (1S) at center-of-mass energies between 4.01 and 4.60 GeV
Creator: Achasov, M. N.
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Ahmed, S.
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Chelkov, G. A.
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Ablikim, M.
Date: 2017
DOI: 10.1103/PhysRevD.96.051101
Description: We present first evidence for the process e+e−→γηc(1S) at six center-of-mass energies between 4.01 and 4.60 GeV using data collected by the BESIII experiment operating at BEPCII. We measure the Born cross section at each energy using a combination of twelve ηc(1S) decay channels. We also combine all six energies under various assumptions for the energy-dependence of the cross section. If the process is assumed to proceed via the Y(4260), we measure a peak Born cross section σpeak(e+e−→γηc(1S))=2.11±0.49(stat.)±0.36(syst.) pb with a statistical significance of 4.2σ.

Created: 06-12-2018

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Радиофизический факультет Evidence for e+e-→γηc (1S) at center-of-mass energies between 4.01 and 4.60 GeV