Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-11-13
Phys.Rev.D80:034033,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
68 pages, 3 figures; published version, including a discussion of the results of Ref. (5) and the new Appendix J
Scientific paper
10.1103/PhysRevD.80.034033
We calculate, with several corrections, the non-relativistic binding by Higgs exchange and gluon exchange between six top and six anti-top quarks (actually replaced by left-handed b quarks from time to time). The remarkable result is that, within our calculational accuracy of the order of 14% in the top quark Yukawa coupling g_t, the experimental running top-quark Yukawa coupling g_t = 0.935 happens to have just that value which gives a perfect cancellation of the unbound mass = 12 top-quark masses by this binding energy. In other words the bound state is massless to the accuracy of our calculation. Our calculation is in disagreement with a similar calculation by Kuchiev et al., but this deviation may be explained by a phase transition. We and Kuchiev et al. compute on different sides of this phase transition.
Froggatt Colin D.
Nielsen Holger Bech
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