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Stellar test of the physics of unification

J. P. P. Vieira, C. J. A. P. Martins, M. J. P. F. G. Monteiro

We discuss the feasibility of using solar-type main-sequence stars as probes of fundamental physics and unification. We use a simple polytropic stellar structure model and study its sensitivity to variations of the gravitational, strong and electroweak coupling constants in the context of unification scenarios. We quantify the sensitivity of the Sun’s interior temperature to these variations, finding |Δα/α| ≲ 1.3×10-4 for a ’canonical’ choice of unification scenario, and discuss prospects for future improvements.

Physical Review D
Volume 86, Issue 4, Page 043003_1
2012 August

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Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia