Dynamical study of BK with improved staggered quarks

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We report here on the preliminary results for the calculation of the Kaon parameter BK using improved staggered fermions. The scaling corrections that affected previous staggered determinations of BK have been proved to be reduced by using improved actions (HYP, Asqtad) in the quenched approximation. This improved behaviour allows us to perform a reliable dynamical calculation of BK including quark vacuum polarization effects using the MILC (2+1) flavour dynamical configurations. We also discuss the renormalization effects with the Asqtad action and the possible ways to improve the calculation.

References (26)

  • A.J. Buras et al.

    Nucl. Phys. B

    (1990)
    S. Herrlich et al.

    Nucl. Phys. B

    (1994)

    Phys. Rev. D

    (1995)

    Nucl. Phys. B

    (1996)
    M. Ciuchini et al.

    Nucl. Phys. B

    (1998)
  • A.J. Buras

    Weak Hamiltonian, CP violation and rare decays

    (1998)
    G. Buchalla et al.

    Rev. Mod. Phys.

    (1996)
  • J. Charles

    Eur. Phys. J. C

    (2005)
    M. Bona

    J. High Energy Phys.

    (2005)
  • S. Aoki

    Phys. Rev. Lett.

    (1998)
  • E. Gámiz et al.

    Nucl. Phys. Proc. Suppl.

    (2005)
  • Y. Aoki
  • T. Bae et al.

    Proc. Sci.

    (2005)
    J. Kim et al.

    Proc. Sci.

    (2005)
  • A. Hasenfratz et al.

    Phys. Rev. D

    (2001)
  • C.W. Bernard

    Phys. Rev. D

    (2001)
  • Q. Mason

    Phys. Rev. Lett.

    (2005)
  • C.T.H. Davies

    Phys. Rev. Lett.

    (2004)
  • U. Nierste
  • A. Pich et al.

    Phys. Lett. B

    (1985)
    J. Prades et al.

    Z. Phys. C

    (1991)

    • Cited by (0)

    ⁎

    Talk presented by E. Gámiz at Workshop on Computational Hadron Physics, Cyprus, September 14-17, 2005.

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