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Comment on “SU(5) octet scalar at the LHC” (CROSBI ID 219450)

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Doršner, Ilja Comment on “SU(5) octet scalar at the LHC” // Physical review. D, Particles, fields, gravitation, and cosmology, 91 (2015), 118701-1-118701-2. doi: 10.1103/PhysRevD.91.118701

Podaci o odgovornosti

Doršner, Ilja

engleski

Comment on “SU(5) octet scalar at the LHC”

I address the validity of results presented in [S. Khalil, S. Salem, and M. Allam, Phys. Rev. D 89, 095011 (2014)] with regard to unification of gauge couplings within a particular SU(5) framework. The scalar sector of the proposed SU(5) model contains one 5- dimensional, one 24-dimensional, and one 45-dimensional representation. The authors discuss one specific unification scenario that supports the case for the LHC accessible color octet scalar. I show that the unification analysis in question is based on (i) an erroneous assumption related to the issue of nucleon stability and (ii) an incorrect input for the applicable set of renormalization group equations. This, in my view, invalidates the aforementioned gauge coupling unification study. I also question a source of the fermion mass relations presented in that work.

Grand Unification; Proton Decay; SU(5) Gauge Group;

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Podaci o izdanju

91

2015.

118701-1-118701-2

objavljeno

1550-7998

10.1103/PhysRevD.91.118701

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Fizika

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