Measurement of masses of the Xi(c)(2645) and Xi(c)(2815) baryons and observation of Xi(c)(2980) ---> Xi(c)(2645)pi
Feb, 200813 pages
Published in:
- Phys.Lett.B 665 (2008) 9-15
e-Print:
- 0802.3968 [hep-ex]
Report number:
- KEK-PREPRINT-2007-79,
- BELLE-PREPRINT-2008-7
Experiments:
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Abstract: (Elsevier)
We report a precise measurement of the masses of the Ξc(2645) and Ξc(2815) baryons using a data sample of 414 fb −1 collected by the Belle Collaboration at the KEKB e+e− collider. The states Ξc(2645)0,+ are observed in the Ξc+,0π−,+ decay modes, while the Ξc(2815)0,+ are reconstructed in the Ξc(2645)+,0π−,+ decay modes. The following mass splittings are determined: mΞc(2645)+−mΞc(2645)0=(−0.1±0.3(stat)±0.6(syst)) MeV/c2 and mΞc(2815)+−mΞc(2815)0=(−3.4±1.9(stat)±0.9(syst)) MeV/c2 with a much better precision than the current world averages. We also observe a new decay mode, Ξc(2980)0,+→Ξc(2645)+,0π−,+ .Note:
- 13 pages, 4 figures, submitted to Phys. Lett. B
- 13.25.Gv
- 13.20.Jf
- 13.25.Ft
- 14.40.Lb
- anti-p p: colliding beams
- anti-p p: inclusive reaction
- W: hadroproduction
- photon: associated production
- W: leptonic decay
- coupling: (3gauge boson)
References(21)
Figures(4)