Lattice Calculation of Baryon Masses using the Clover Fermion Action

D. Pleiter; G. Schierholz; LHPC Collaboration: D. G. Richards; P. E. L. Rakow; QCDSF Collaboration: M. Gockeler; R. Horsley; UKQCD Collaboration: C. M. Maynard

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Lattice Calculation of Baryon Masses using the Clover Fermion Action

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arxiv nucl-th/0206049 v1 pith:3DRTCWLM submitted 2002-06-19 nucl-th

LHPC Collaboration: D. G. Richards , QCDSF Collaboration: M. Gockeler , R. Horsley , D. Pleiter , P. E. L. Rakow , G. Schierholz , UKQCD Collaboration: C. M. Maynard This is my paper

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keywords massesnucleonactionbaryoncalculationcloverfermionparity

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We present a calculation of the lowest-lying baryon masses in the quenched approximation to QCD. The calculations are performed using a non-perturbatively improved clover fermion action, and a splitting is found between the masses of the nucleon and its parity partner. An analysis of the mass of the first radial excitation of the nucleon finds a value considerably larger than that of the parity partner of the nucleon, and thus little evidence for the Roper resonance as a simple three-quark state

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