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Ratio m(c)/m(s) with Wilson fermions.

Stephan Dürr1, Giannis Koutsou

  • 1Bergische Universität Wuppertal, Gaußstraße 20, 42119 Wuppertal, Germany.

Physical Review Letters
|May 1, 2012
PubMed
Summary
This summary is machine-generated.

We calculated the charm to strange quark mass ratio using lattice quantum chromodynamics (QCD) simulations. Our results yield m(c)/m(s) = 11.27(30)(26), providing crucial data for particle physics.

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Area of Science:

  • * Quantum Chromodynamics (QCD) and lattice gauge theory.
  • * Hadron spectroscopy and fundamental particle properties.

Background:

  • * Precise determination of quark masses is essential for understanding the Standard Model.
  • * Lattice QCD provides a non-perturbative approach to calculating these fundamental parameters.

Purpose of the Study:

  • * To compute the ratio of the charm quark mass to the strange quark mass, m(c)/m(s).
  • * To employ advanced lattice QCD techniques for high precision.

Main Methods:

  • * Utilized N(f)=2 dynamical clover-improved fermion configurations from the QCDSF Collaboration.
  • * Employed a mass-independent O(a)-improved Wilson-type action in the valence sector.
  • * Performed extrapolations to the physical pion mass, zero lattice spacing, and infinite volume.

Main Results:

  • * The quark mass ratio was determined to be m(c)/m(s) = 11.27(30)(26).
  • * Minimized cutoff effects, even in the charm quark mass region.

Conclusions:

  • * The calculated m(c)/m(s) ratio offers a precise value from first-principles lattice QCD calculations.
  • * This result contributes to refining parameters within the Standard Model of particle physics.