- Physical Review Journals
All JournalsPhysics Magazine
Access Provided by Xinjiang University

Physical Review D

Export citation

Export citation

Choose format for download:

Download Citation
  • Access by Xinjiang University

Improved determination of BK with staggered quarks

Taegil Bae1, Yong-Chull Jang1, Hwancheol Jeong1, Chulwoo Jung2, Hyung-Jin Kim2, Jangho Kim1, Jongjeong Kim1, Kwangwoo Kim1, Sunghee Kim1 et al. (SWME Collaboration)

Sunghee Kim1, Weonjong Lee1, Jaehoon Leem1, Jeonghwan Pak1, Sungwoo Park1, Stephen R. Sharpe3, and Boram Yoon4 (SWME Collaboration)

  • 1Department of Physics and Astronomy, Lattice Gauge Theory Research Center, FPRD, and CTP, Seoul National University, Seoul 151-747, South Korea
  • 2Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA
  • 3Physics Department, University of Washington, Seattle, Washington 98195-1560, USA
  • 4Los Alamos National Laboratory, Theoretical Division T-2, MS B283, Los Alamos, New Mexico 87545, USA

PDF

Phys. Rev. D 89, 074504 – Published 8 April, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.074504

Abstract

We present results for the kaon mixing parameter BK obtained using improved staggered fermions on a much enlarged set of MILC asqtad lattices. Compared to our previous publication, which was based largely on a single ensemble at each of the three lattice spacings a≈0.09  fm, 0.06 fm and 0.045 fm, we have added seven new fine and four new superfine ensembles, with a range of values of the light and strange sea-quark masses. We have also increased the number of measurements on one of the original ensembles. This allows us to do controlled extrapolations in the light and strange sea-quark masses, which we do simultaneously with the continuum extrapolation. This reduces the extrapolation error and improves the reliability of our error estimates. Our final result is B^K=0.7379±0.0047(stat)±0.0365(sys).

View figure in article

Article Text

References (23)

  1. R. Arthur et al. (RBC and UKQCD Collaborations), Phys. Rev. D 87, 094514 (2013).
  2. T. Bae, Y.-C. Jang, C. Jung, H.-J. Kim, J. Kim et al., Phys. Rev. Lett. 109, 041601 (2012).
  3. S. Durr, Z. Fodor, C. Hoelbling, S. Katz, S. Krieg et al., Phys. Lett. B 705, 477 (2011).
  4. C. Aubin, J. Laiho, and R. S. Van de Water, Phys. Rev. D 81, 014507 (2010).
  5. S. Aoki, Y. Aoki, C. Bernard, T. Blum, G. Colangelo et al., arXiv:1310.8555.
  6. T. Bae, Y.-C. Jang, C. Jung, H.-J. Kim, J. Kim, J. Kim, K. Kim, W. Lee, S. R. Sharpe, and B. Yoon, Phys. Rev. D 82, 114509 (2010).
  7. T. Bae, Y.-C. Jang, H. Jeong, J. Kim, J. Kim et al., Proc. Sci., LATTICE2013 (2013) 476 [arXiv:1310.7319].
  8. J. Kim, W. Lee, and S. R. Sharpe, Phys. Rev. D 83, 094503 (2011).
  9. A. Bazavov, D. Toussaint, C. Bernard, J. Laiho, C. DeTar et al., Rev. Mod. Phys. 82, 1349 (2010).
  10. A. Hasenfratz and F. Knechtli, Phys. Rev. D 64, 034504 (2001).
  11. C. Bernard (private communication).
  12. C. Davies, E. Follana, I. Kendall, G. P. Lepage, and C. McNeile (HPQCD Collaboration), Phys. Rev. D 81, 034506 (2010).
  13. W.-J. Lee and S. R. Sharpe, Phys. Rev. D 60, 114503 (1999).
  14. C. Aubin and C. Bernard, Phys. Rev. D 68, 034014 (2003).
  15. R. S. Van de Water and S. R. Sharpe, Phys. Rev. D 73, 014003 (2006).
  16. G. P. Lepage, B. Clark, C. T. H. Davies, K. Hornbostel, P. B. Mackenzie, C. Morningstar, and H. Trottier, Nucl. Phys. B, Proc. Suppl. 106, 12 (2002).
  17. B. Yoon, T. Bae, H.-J. Kim, J. Kim, J. Kim et al., Proc. Sci., LAT2009 (2009) 263 [arXiv:0910.5581].
  18. B. Yoon, Y.-C. Jang, J. Korean Phys. Soc. 63, 145 (2013).
  19. J. Kim, C. Jung, H.-J. Kim, W. Lee, and S. R. Sharpe, Phys. Rev. D 83, 117501 (2011).
  20. A. Bazavov et al. (Fermilab Lattice and MILC Collaborations), Phys. Rev. D 85, 114506 (2012).
  21. G. Martinelli, C. Pittori, C. T. Sachrajda, M. Testa, and A. Vladikas, Nucl. Phys. B445, 81 (1995).
  22. J. Kim, B. Yoon, and W. Lee, Proc. Sci., LATTICE2012 (2012) 241 [arXiv:1211.2077].
  23. A. T. Lytle and S. R. Sharpe, Phys. Rev. D 88, 054506 (2013).

Outline

Information

Phys. Rev. D 89, 074504– Published 8 April, 2014
  • Received 20 February 2014

© 2014 American Physical Society

Sign In to Your Journals Account

Filter

Filter

Article Lookup

Enter a citation