Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 11, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP11(2017)020
Keywords
Effective Field Theories; Global Symmetries; Supersymmetric Effective Theories; Space-Time Symmetries
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Funding
- MIUR-FIRB [RBFR12H1MW]
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We discuss the only two viable realizations of fermion compositeness described by a calculable relativistic effective field theory consistent with unitarity, crossing symmetry and analyticity: chiral-compositeness vs goldstino-compositeness. We construct the e ffective theory of N Goldstini and show how the Standard Model can emerge from this dynamics. We present new bounds on either type of compositeness, for quarks and leptons, using dilepton searches at LEP, dijets at the LHC, as well as low-energy observables and precision measurements. Remarkably, a scale of compositeness for Goldstino-like electrons in the 2TeV range is compatible with present data, and so are Goldstino-like first generation quarks with a compositeness scale in the 10TeV range. Moreover, assuming maximal R-symmetry, goldstino-compositeness of both right-and left-handed quarks predicts exotic spin-1/2 colored sextet particles that are potentially within the reach of the LHC.
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