Testing naturalness at 100 TeV

Chuan Ren Chen, Jan Hajer, Tao Liu, Ian Low, Hao Zhang

研究成果: 雜誌貢獻文章

3 引文 斯高帕斯(Scopus)

摘要

Solutions to the electroweak hierarchy problem typically introduce a new symmetry to stabilize the quadratic ultraviolet sensitivity in the self-energy of the Higgs boson. The new symmetry is either broken softly or collectively, as for example in supersymmetric and little Higgs theories. At low energies such theories contain naturalness partners of the Standard Model fields which are responsible for canceling the quadratic divergence in the squared Higgs mass. Post the discovery of any partner-like particles, we propose to test the aforementioned cancellation by measuring relevant Higgs couplings. Using the fermionic top partners in little Higgs theories as an illustration, we construct a simplified model for naturalness and initiate a study on testing naturalness. After electroweak symmetry breaking, naturalness in the top sector requires aT = − λt 2 at leading order, where λt and aT are the Higgs couplings to a pair of top quarks and top partners, respectively. Using a multivariate method of Boosted Decision Tree to tag boosted particles in the Standard Model, we show that, with a luminosity of 30 ab−1 at a 100 TeV pp-collider, naturalness could be tested with a precision of 10% for a top partner mass up to 2.5 TeV.

原文英語
文章編號129
期刊Journal of High Energy Physics
2017
發行號9
DOIs
出版狀態已發佈 - 2017 九月 1

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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