Hierarchy problem: Difference between revisions

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== Examples in particle physics ==
===The Higgs mass===
In [[particle physics]], the most important hierarchy problem is the question that asks why the [[weak force]] is 10<sup>24</sup> times as strong as [[gravity]].<ref>http://web.mit.edu/sahughes/www/8.022/lec01.pdf {{Bare URL PDF|date=March 2022}}</ref> Both of these forces involve constants of nature, the [[Fermi constant]] for the weak force and the [[Newtonian constant of gravitation]] for gravity. Furthermore, if the [[Standard Model]] is used to calculate the quantum corrections to Fermi's constant, it appears that Fermi's constant is surprisingly large and is expected to be closer to Newton's constant unless there is a delicate cancellation between the bare value of Fermi's constant and the quantum corrections to it.
 
[[File:Hqmc-vector.svg|thumb|300px|right|Cancellation of the [[Higgs boson]] quadratic [[mass renormalization]] between [[fermion]]ic [[top quark]] loop and [[scalar field|scalar]] stop [[squark]] tadpole [[Feynman diagram]]s in a [[supersymmetry|supersymmetric]] extension of the [[Standard Model]]]]