A 1993 look at the lower bound on the top quark mass from CP violation

1993/07/22 by Andrzej J. Buras · 2 citations
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1016/0370-2693(93)91023-g

published as Phys.Lett.B317:449-453,1993 · latex, 8p, 3 figs not included, MPI-Ph/93-52 and TUM-T31-45/93

arxiv created 1993/07/22 · openalex publication_date 1993/11/01 · arxiv updated 2010/11/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We point out that the lower bound on m_t from the CP violation parameter ε_K has increased considerably. Using Wolfenstein parametrization of the CKM matrix we derive an analytic expression for this bound as a function of | V_cb|, | V_ub/V_cb| and the non-perturbative parameter B_K. For B_K≤ 0.80,| V_cb |≤ 0.040 and | V_ub/V_cb|≤ 0.10 we find m_t > 130 GeV. However, for B_K ≤ 0.70, | V_cb| ≤ 0.038 and | V_ub/V_cb| ≤ 0.08 the bound is raised to m_t > 205~GeV. The lower bound on m_t from B^o- B^o mixing is also reconsidered.

Cited by

• An analytic formula and an upper bound for in the Standard Model
• Waiting for the top quark mass,K+→π+νν¯,Bs0-B¯s0mixing, andCPasymmetries inBdecays