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Heavy-baryon spectroscopy from lattice QCD. (English) Zbl 1219.81257

Summary: We use a four-dimensional lattice calculation of the full-QCD (quantum chromodynamics, the non-abelian gauge theory of the strong interactions of quarks and gluons) path integrals needed to determine the masses of the charmed and bottom baryons. In the charm sector, our results are in good agreement with experiment within our systematics, except for the spin-1/2 \(\Xi _{cc}\), for which we found the isospin-averaged mass to be \(\Xi _{cc}\) to be \(3665\pm 17\pm 14_{-78}^{+0}\) MeV. We predict the mass of the (isospin-averaged) spin-1/2 \(\Omega _{cc}\) to be \(3763\pm 19\pm 26_{-79}^{+13}\) MeV. In the bottom sector, our results are also in agreement with experimental observations and other lattice calculations within our statistical and systematic errors. In particular, we find the mass of the \(\Omega_b\) to be consistent with the recent CDF measurement. We also predict the mass for the as yet unobserved \(\Xi_b'\) to be \(5955(27)\) MeV.

MSC:

81V35 Nuclear physics
81V05 Strong interaction, including quantum chromodynamics
81T13 Yang-Mills and other gauge theories in quantum field theory
81T25 Quantum field theory on lattices
81T80 Simulation and numerical modelling (quantum field theory) (MSC2010)
81-08 Computational methods for problems pertaining to quantum theory

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References:

[1] Liu, L.; Lin, H.-W.; Orginos, K.; Walker-Loud, A., Singly and doubly charmed \(J = 1 / 2\) baryon spectrum from lattice QCD
[2] Lin, H.-W.; Cohen, S. D.; Mathur, N.; Orginos, K., Bottom-hadron mass splittings from static-quark action on \(2 + 1\)-flavor lattices, Phys. Rev. D, 80, 054027 (2009)
[3] Abazov, V. M., Observation of the doubly strange \(b\) baryon \(\Omega_b^-\), Phys. Rev. Lett., 101, 232002 (2008)
[4] Aaltonen, T., Observation of the \(\Omega_b^-\) and measurement of the properties of the \(\Xi_b^-\) and \(\Omega_b^-\)
[5] Na, H.; Gottlieb, S., Heavy baryon mass spectrum from lattice QCD with \(2 + 1\) dynamical sea quark flavors, PoS LATTICE2008, 119 (2008)
[6] Lewis, R.; Woloshyn, R. M., Bottom baryons from a dynamical lattice QCD simulation, Phys. Rev. D, 79, 014502 (2009)
[7] Detmold, W.; Lin, C. J.D.; Wingate, M., Bottom hadron mass splittings in the static limit from \(2 + 1\) flavour lattice QCD · Zbl 1194.81258
[8] Lin, H.-W., First results from \(2 + 1\) dynamical quark flavors on an anisotropic lattice: light-hadron spectroscopy and setting the strange-quark mass, Phys. Rev. D, 79, 034502 (2009)
[9] Edwards, R. G.; Joo, B.; Lin, H.-W., Tuning for three-flavors of anisotropic clover fermions with stout-link smearing, Phys. Rev. D, 78, 054501 (2008)
[10] Peardon, M., A novel quark-field creation operator construction for hadronic physics in lattice QCD
[11] Edwards, R. G.; Joo, B., The Chroma software system for lattice QCD, Nucl. Phys. Proc. Suppl., 140, 832 (2005)
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