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High Energy Physics - Phenomenology

arXiv:hep-ph/0406094 (hep-ph)
[Submitted on 8 Jun 2004 (v1), last revised 15 Sep 2004 (this version, v2)]

Title:Kaon mixing and the charm mass

Authors:O. Cata, S. Peris (IFAE and UAB)
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Abstract: We study contributions to the Delta S=2 weak Chiral Lagrangian producing K0-K0bar mixing which are not enhanced by the charm mass. For the real part, these contributions turn out to be related to the box diagram with up quarks but, unlike in perturbation theory, they do not vanish in the limit m_u->0. They increase the leading contribution to the K_L-K_S mass difference by ~10%. This means that short distances amount to (90+-15)% of this mass difference. For the imaginary part, we find a correction to the lambda_c^2 m_c^2 term of -5% from the integration of charm, which is a small contribution to epsilon_K. The calculation is done in the large-Nc limit and we show explicitly how to match short and long distances.
Comments: 20 pages, 5 figures. Typos fixed
Subjects: High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Lattice (hep-lat)
Cite as: arXiv:hep-ph/0406094
  (or arXiv:hep-ph/0406094v2 for this version)
  https://doi.org/10.48550/arXiv.hep-ph/0406094
Journal reference: JHEP0407:079,2004
Related DOI: https://doi.org/10.1088/1126-6708/2004/07/079

Submission history

From: Santi Peris [view email]
[v1] Tue, 8 Jun 2004 13:06:55 UTC (37 KB)
[v2] Wed, 15 Sep 2004 12:23:47 UTC (37 KB)
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