epsilon-prime / epsilon in the Standard Model
(1988) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 203, n° 3, p. 272-278 (1988)
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- Abstract
- We study the dependence of var epsilon′/var epsilon on the values of the top quark mass mt, B-meson lifetime τ(B), Image and the strange quark mass ms (1 GeV) in the framework of the standard model. We use the 1/N approach to calculate the hadronic matrix elements. We find a simple formula for var epsilon′/var epsilon as a function of the parameters listed above which to an excellent accuracy describes our numerical results. Restrictions from the experimental value of var epsilon allow two solutions for var epsilon′/var epsilon, one of which can be ruled out by the recently observed B0−Image 0 mixing. For Image , τB=1.1×10−12 s and 55 GeV less-than-or-equals, slant mt less-than-or-equals, slant 130 GeV find var epsilon′/var epsilon=[150 Mev/ms(1 GeV)]2·(1.7±1.0)×1.0−3. For ms(1 GeV) > 150 MeV the central experimental value for var epsilon′/var epsilon implies mt=O(50 GeV. Further constraints on var epsilon′/var epsilon coming from B0−Image 0 mixing are discussed.
- Affiliations
Munich, Max Planck Inst.
Citations
Buras, A. J., & Gérard, J.-M. (1988). epsilon-prime / epsilon in the Standard Model. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 203(3), 272-278. https://doi.org/10.1016/0370-2693(88)90551-5 (Original work published 1988)