2017
DOI: 10.1016/j.physletb.2017.05.065
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Gauge coupling unification without leptoquarks

Abstract: We propose an interpretation of the gauge coupling unification scale which is not related to any new particle threshold. We revisit Grand Unified Theories and show that it is possible to completely eliminate the scalar as well as vector leptoquarks from the particle physics spectrum. As a consequence, in our approach the gauge hierarchy problem is put on different grounds, and the proton may be absolutely stable. In order to achieve that, we employ a number of nonlinear gauge-invariant constraints which only a… Show more

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Cited by 21 publications
(19 citation statements)
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“…Of course, even if one evades any heavy mass thresholds coming with the physics beyond the SM, the Planck scale enters unavoidably any theory comprising the SM and General Relativity (GR). As the Planck Email addresses: Mikhail.Shaposhnikov@epfl.ch (Mikhail Shaposhnikov), Andrey.Shkerin@epfl.ch (Andrey Shkerin) 1 This requirement does not exclude Grand Unified Theories, which can be constructed without leptoquarks [3]. mass M P does not represent a mass of any particle but rather serves as a parameter measuring the strength of gravitational interaction (for an overview see, e.g.…”
Section: Introduction and Setupmentioning
confidence: 99%
“…Of course, even if one evades any heavy mass thresholds coming with the physics beyond the SM, the Planck scale enters unavoidably any theory comprising the SM and General Relativity (GR). As the Planck Email addresses: Mikhail.Shaposhnikov@epfl.ch (Mikhail Shaposhnikov), Andrey.Shkerin@epfl.ch (Andrey Shkerin) 1 This requirement does not exclude Grand Unified Theories, which can be constructed without leptoquarks [3]. mass M P does not represent a mass of any particle but rather serves as a parameter measuring the strength of gravitational interaction (for an overview see, e.g.…”
Section: Introduction and Setupmentioning
confidence: 99%
“…We assume that the new particles are coupled sufficiently strongly to the Higgs field 3. In fact, this observation can well be applied to the case of new physics much below the Planck scale.For example, in[7] an interpretation of the gauge coupling unification scale was proposed, which is not related to any new particle threshold; see also[8].…”
mentioning
confidence: 99%
“…We first decompose the metric g into the background Schwarzschild-de Sitter and a small perturbation h: (15) such that the g is given by…”
Section: Perturbationsmentioning
confidence: 99%