A model of dynamical SUSY breaking

Supersymmetric (SUSY) models and dynamical breaking of symmetries have been used to explain hierarchies of mass scales. We find that a chiral representation, (10) over bar circle plus (5) over bar circle plus 2.5 in SUSY SU(5) in the hidden sector, breaks global SUSY dynamically, by producing a composite field phi below the SU(5) confinement scale. This dynamical SUSY breaking can have two important applications, one in particle physics and the other in cosmology. Gravitational effects transmit this dynamical breaking to the standard model(SM) superpartners and the quintessential vacuum energy. The SM superpartners feel the effects just by the magnitude of the gravitino mass while the smallness of the quintessential vacuum energy is due to the composite nature of a singlet field phi. The composite phi carries a global charge which is hardly broken in SUSY and hence its phase can be used toward a quintessential axion for dark energy of the Universe. (C) 2019 The Author(s). Published by Elsevier B.V.