Why should we care about the top quark Yukawa coupling?
By Fedor Bezrukov, M. Shaposhnikov. Journal of Experimental and Theoretical Physics, 2014
138 citations recorded by the source corpus.
In the cosmological context, for the Standard Model to be valid up to the scale of inflation, the top quark Yukawa coupling yt should not exceed the critical value ytcrit, coinciding with good precision (about 0.2‰) with the requirement of the stability of the electroweak vacuum. So, the exact measurements of yt may give an insight on the possible existence and the energy scale of new physics above 100 GeV, which is extremely sensitive to yt. We overview the most recent theoretical computations of and the experimental measurements of ytcrit and the experimental measurements of yt. Within the theoretical and experimental uncertainties in yt, the required scale of new physics varies from 107 GeV to the Planck scale, urging for precise determination of the top quark Yukawa coupling.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/e444e225e2ede410b487b7e4607a92759c91f6b1
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In Nuclear and High Energy Physics
Citations in the corpus
- Higgs Inflation (2018, background): “Neglecting the effect of potential higher dimensional operators, the critical value of the top Yukawa coupling separating the region of absolute stability from the metastability/instability1 regions is given by [15]”
- The nonperturbative functional renormalization group and its applications (2020, background): “42Whether or not the electroweak vacuum is absolutely stable or metastable sensitively depends [1257] on the value of the top quark mass [1258, 1259].”