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The static-light baryon spectrum from twisted mass lattice QCD

  • European Collaboration
  • Marc Wagner
  • Christian Wiese
Article

Abstract

We compute the static-light baryon spectrum by means of Wilson twisted mass lattice QCD using N f  = 2 flavors of sea quarks. As light u/d valence quarks we consider quarks, which have the same mass as the sea quarks with corresponding pion masses in the range 340 MeV ≲ m PS ≲ 525 MeV,aswellaspartially quenched s quarks, which have a mass around the physical value. We consider all possible combinations of two light valence quarks, i.e. Λ, Σ, Ξ and Ω baryons corresponding to isospin I ∈ {0, 1/2, 1} and strangeness S ∈{0, − 1, − 2} as well as angular momentum of the light degrees of freedom j ∈{0, 1} and parity P ∈{+ , −}. We extrapolate in the light u/d and in the heavy b quark mass to the physical point and compare with available experimental results. Besides experimentally known positive parity states we are also able to predict a number of negative parity states, which have neither been measured in experiments nor previously been computed by lattice methods.

Keywords

Lattice QCD B-Physics 

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Copyright information

© SISSA, Trieste, Italy 2011

Authors and Affiliations

  • European Collaboration
  • Marc Wagner
    • 1
  • Christian Wiese
    • 1
  1. 1.Humboldt-Universität zu Berlin, Institut für PhysikBerlinGermany

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