New experimental tests of sum rules for charmed baryon masses

Details New experimental tests of sum rules for charmed baryon masses New experimental tests of sum rules for charmed baryon masses

1999-01-13

arxiv.org/abs/hep-ph/9901294v1

Phys.Rev. D59 (1999) 117502

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, latex, no figures

Scientific paper

10.1103/PhysRevD.59.117502

New experimental measurements are used to test model independent sum rules for charmed baryon masses. Sum rules for medium-strong mass differences are found to be reasonably well satisfied with increasing accuracy, and the new measurements permit an improved prediction of $2778\pm 9$ MeV for the mass of the $\Omega_c^{*0}$. But an isospin breaking sum rule for the $\Sigma_c$ mass splittings is still in significant disagreement posing a serious problem for the quark model of charmed baryons. Individual $\Sigma_c$ mass splittings are investigated, using the new CLEO measurement of the $\Xi_c^\prime$ mass splitting, but the accuracy is not yet sufficient for a good test.

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