Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 6, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP06(2015)028
Keywords
Supersymmetry Phenomenology; Phenomenology of Field Theories in Higher Dimensions
Categories
Funding
- STFC [ST/J002798/1, ST/L000326/1]
- London Centre for Terauniverse Studies (LCTS) from the European Research Council [26732]
- Graduate Teaching Assistantship from King's College London
- Science and Technology Facilities Council [ST/L000326/1, ST/J002798/1] Funding Source: researchfish
- STFC [ST/J002798/1, ST/L000326/1] Funding Source: UKRI
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We develop a universal approach to the one-loop effective field theory (EFT) using the Covariant Derivative Expansion (CDE) method. We generalise previous results to include broader classes of UV models, showing how expressions previously obtained assuming degenerate heavy-particle masses can be extended to non-degenerate cases. We apply our method to the general MSSM with non-degenerate stop squarks, illustrating our approach with calculations of the coefficients of dimension-6 operators contributing to the hgg and h gamma gamma couplings, and comparing with exact calculations of one-loop Feynman diagrams. We then use present and projected future sensitivities to these operator coefficients to obtain present and possible future indirect constraints on stop masses. The current sensitivity is already comparable to that of direct LHC searches, and future FCC-ee measurements could be sensitive to stop masses above a TeV. The universality of our one-loop EFT approach facilitates extending these constraints to a broader class of UV models.
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