Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 12, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP12(2016)052
Keywords
Beyond Standard Model; Effective field theories; Kaon Physics
Categories
Funding
- LABEX Lyon Institute of Origins of the Universite de Lyon within the program of the French government [ANR-10-LABX-0066, ANR-11-IDEX-0007]
- People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme (FP7) under REA grant [PIOF-GA-2012-330458]
- LABEX Lyon Institute of Origins of the Universite de Lyon within the program of the French government [ANR-10-LABX-0066, ANR-11-IDEX-0007]
- People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme (FP7) under REA grant [PIOF-GA-2012-330458]
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We analyze the decays K -> pi l nu and P -> l nu (P = K, pi, l = e, mu) using a low-energy Effective-Field-Theory approach to parametrize New Physics and study the complementarity with baryon beta decays. We then provide a road map for a global analysis of the experimental data, with all the Wilson coefficients simultaneously, and perform a fit leading to numerical bounds for them and for V-us. A prominent result of our analysis is a reinterpretation of the well-known V-ud-V-us diagram as a strong constraint on new physics. Finally, we reinterpret our bounds in terms of the SU(2)(L) x U(1)Y-invariant operators, provide bounds to the corresponding Wilson coefficients at the TeV scale and compare our results with collider searches at the LHC.
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