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Study of e(+)e(-) -> omega chi(cJ) at Center of Mass Energies from 4.21 to 4.42 GeV
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2015 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 114, no 9, 092003Article in journal (Refereed) Published
Abstract [en]

Based on data samples collected with the BESIII detector at the BEPCII collider at nine center of mass energies from 4.21 to 4.42 GeV, we search for the production of e(+)e(-) -> omega chi(cJ) (J = 0, 1, 2). The process e(+)e(-) -> omega chi(c0) is observed for the first time, and the Born cross sections at root s = 4.23 and 4.26 GeV are measured to be (55.4 +/- 6.0 +/- 5.9) and (23.7 +/- 5.3 +/- 3.5) pb, respectively, where the first uncertainties are statistical and the second are systematic. The omega chi(c0) signals at the other seven energies and the e(+)e(-) -> omega chi(c1) and omega chi(c2) signals are not significant, and the upper limits on the cross sections are determined. By examining the omega chi(c0) cross section as a function of center of mass energy, we find that it is inconsistent with the line shape of the Y(4260) observed in e(+)e(-) -> pi(+)pi(-) J/psi Assuming the omega chi(c0) signals come from a single resonance, we extract the mass and width of the resonance to be (4230 +/- 8 +/- 6) MeV/c(2) and (38 +/- 12 +/- 2) MeV, respectively, and the statistical significance is more than 9 sigma.

Place, publisher, year, edition, pages
2015. Vol. 114, no 9, 092003
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Physical Sciences
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URN: urn:nbn:se:uu:diva-251814DOI: 10.1103/PhysRevLett.114.092003ISI: 000350976700007PubMedID: 25793804OAI: oai:DiVA.org:uu-251814DiVA: diva2:808229
Available from: 2015-04-27 Created: 2015-04-24 Last updated: 2017-12-04Bibliographically approved

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Johansson, TordKupsc, AndrezejSchönning, KarinWolke, Magnus

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