Physics Letters B (Mar 2015)

Phases with modular ground states for symmetry breaking by rank 3 and rank 2 antisymmetric tensor scalars

  • Stephen L. Adler

DOI
https://doi.org/10.1016/j.physletb.2015.01.037
Journal volume & issue
Vol. 742
pp. 231 – 235

Abstract

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Working with explicit examples given by the 56 representation in SU(8), and the 10 representation in SU(5), we show that symmetry breaking of a group G⊃G1×G2 by a scalar in a rank three or two antisymmetric tensor representation leads to a number of distinct modular ground states. For these broken symmetry phases, the ground state is periodic in an integer divisor p of N, where N>0 is the absolute value of the nonzero U(1) generator of the scalar component Φ that is a singlet under the simple subgroups G1 and G2. Ground state expectations of fractional powers Φp/N provide order parameters that distinguish the different phases. For the case of period p=1, this reduces to the usual Higgs mechanism, but for divisors N≥p>1 of N it leads to a modular ground state with periodicity p, implementing a discrete Abelian symmetry group U(1)/Zp. This observation may allow new approaches to grand unification and family unification.