New physics from high energy tops

Author:

Farina Marco,Mondino CristinaORCID,Pappadopulo Duccio,Ruderman Joshua T.

Abstract

Abstract Precision measurements of high energy top quarks at the LHC constitute a powerful probe of new physics. We study the effect of four fermion operators involving two tops and two light quarks on the high energy tail of the $$ t\overline{t} $$ t t ¯ invariant mass distribution. We use existing measurements at a center of mass energy of 13 TeV, and state of the art calculations of the Standard Model contribution, to derive bounds on the coefficients of these operators. We estimate the projected reach of the LHC at higher luminosities and discuss the validity of these limits within the Effective Field Theory description. We find that current measurements constrain the mass scale of these operators to be larger than about 1–2 TeV, while we project that future LHC data will be sensitive to mass scales of about 3–4 TeV. We apply our bounds to constrain composite Higgs models with partial compositeness and models with approximate flavor symmetries. We find our limits to be most relevant to flavor non-universal models with a moderately large coupling of the heavy new physics states to third generation quarks.

Publisher

Springer Science and Business Media LLC

Subject

Nuclear and High Energy Physics

Cited by 15 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Physics Beyond the Standard Model Associated with the Top Quark;Annual Review of Nuclear and Particle Science;2023-09-25

2. UV physics from IR features: New prospects from top flavor violation;Physical Review D;2023-05-17

3. Unitarity bounds on effective field theories at the LHC;Journal of High Energy Physics;2022-04-26

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5. Parton distributions in the SMEFT from high-energy Drell-Yan tails;Journal of High Energy Physics;2021-07

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