Measurements of the Sigma_c^0 and Sigma_c^{++} Mass Splittings

Details Measurements of the Sigma_c^0 and Sigma_c^{++} Mass Splittings Measurements of the Sigma_c^0 and Sigma_c^{++} Mass Splittings

2000-05-08

arxiv.org/abs/hep-ex/0005011v1

Phys.Lett.B488:218-224,2000

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, 2 figures

Scientific paper

10.1016/S0370-2693(00)00867-4

Using a high statistics sample of photoproduced charmed particles from the FOCUS experiment at Fermilab (FNAL-E831), we measure the mass splittings of the charmed baryons Sigma_c^0 and Sigma_c^{++}. We find M(Sigma_c^0 - Lambda_c^+) = 167.38 +/- 0.21 +/- 0.13 MeV/c^2 and M(Sigma_c^++ - Lambda_c^+) = 167.35 +/- 0.19 +/- 0.12 MeV/c^2 with samples of 362 +/- 36 and 461 +/- 39 events, respectively. We measure the isospin mass splitting M(Sigma_c^++ - Sigma_c^0) to be -0.03 +/- 0.28 +/- 0.11 Mev/c^2. The first errors are statistical and the second are systematic.

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