Abstract
Abstract
We present the calculation of the short-distance power corrections to the CP-violation parameter εK coming from dimension-8 operators in the ∆S = 2 effective Hamiltonian. A first estimate of this contribution, obtained for large-Nc and in the chiral limit, was provided in ref. [1]. Here we evaluate and include the $$ \mathcal{O}\left({m}_K^2/{m}_c^2\right) $$
O
m
K
2
/
m
c
2
and $$ \mathcal{O}\left({\Lambda}_{\mathrm{QCD}}^2/{m}_c^2\right) $$
O
Λ
QCD
2
/
m
c
2
contributions that, a priori, could induce $$ \mathcal{O} $$
O
(1) corrections to previous estimates, as mK is numerically of order ΛQCD. Our computation shows that there are several dimension-8 operators besides the one considered before. Their effect on εK, however, accidentally cancels out to a large extent, leaving the final correction at the level of 1%.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear and High Energy Physics
Reference26 articles.
1. O. Catà and S. Peris, Kaon mixing and the charm mass, JHEP 07 (2004) 079 [hep-ph/0406094] [INSPIRE].
2. M. Ciuchini et al., 2000 CKM triangle analysis: A Critical review with updated experimental inputs and theoretical parameters, JHEP 07 (2001) 013 [hep-ph/0012308] [INSPIRE].
3. UTfit collaboration, The UTfit collaboration average of D meson mixing data: Winter 2014, JHEP 03 (2014) 123 [arXiv:1402.1664] [INSPIRE].
4. C. Alpigiani et al., Unitarity Triangle Analysis in the Standard Model and Beyond, in 5th Large Hadron Collider Physics Conference, (2017) [arXiv:1710.09644] [INSPIRE].
5. Utfit collaboration, http://www.utfit.org/UTfit/.
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