Solutions to the strong-CP problem in a world with gravity
1992; Elsevier BV; Volume: 282; Issue: 1-2 Linguagem: Inglês
10.1016/0370-2693(92)90491-l
ISSN1873-2445
AutoresR. Holman, Stephen D. H. Hsu, Thomas W. Kephart, Edward W. Kolb, Richard Watkins, Lawrence M. Widrow,
Tópico(s)Particle physics theoretical and experimental studies
ResumoWe examine various solutions of the strong-CP problem to determine their sensitivity to possible violations of global symmetries by Planck scale physics. While some solutions remain viable even in the face of such effects, violations of the Peccei-Quinn (PQ) symmetry by non-renormalizable operators of dimension less than 10 will generally shift the value of θ to values inconsistent with the experimental bound θ≲10−9. We show that it is possible to construct axion models wheregauge symmetries protect the PQ symmetry to the requisite level.
Referência(s)