2017/06/30 by Brando Bellazzini, Francesco Riva, Javi Serra +1
Physics and Astronomy · #Effective field theory #Elementary particle #Fermion #High-Energy Particle Collisions Research #Observable #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Quark #Standard Model (mathematical formulation) #Symmetry (geometry) #Symmetry breaking #hep-ph #hep-th
paper · pdf · doi:10.1007/jhep11(2017)020
published as JHEP 1711 (2017) 020 · 32 pages on how Thomson might have discovered supersymmetry; v2: few typos fixed and comments added
openalex created_date 2017/06/23 · openalex publication_date 2017/11/01 · arxiv created 2017/11/13 · arxiv updated 2017/12/06 · openalex updated_date 2026/08/05
A bstract 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 effective theory of N <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>N</mml:mi> </mml:math> 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 2 TeV range is compatible with present data, and so are Goldstino-like first generation quarks with a compositeness scale in the 10 TeV 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.