The strong CP problem, general covariance, and horizons

Autor(es)

Torrieri, Giorgio ^[1] ; Truran, Henrique ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, Rua Sergio Buarque de Holanda 777, BR-13083859 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Classical and Quantum Gravity; v. 38, n. 21 NOV 4 2021.
• Citações Web of Science: 0

Resumo

We discuss the strong CP problem in the context of quantum field theory in the presence of horizons. We argue that general covariance places constraints on the topological structure of the theory. In particular, it means that coherence between different topological sectors must have no observable consequence, because the degrees of freedom beyond a causal horizon must be traced over for general covariance to apply. Since the only way for this to occur in QCD is for theta = 0, this might lead to a solution of the strong CP problem without extra observable dynamics. (AU)

• Processo FAPESP: 17/05685-2 - Física hadrônica em colisões nucleares de altas energias
• Beneficiário: Jun Takahashi
• Modalidade de apoio: Auxílio à Pesquisa - Projetos Especiais
• Processo FAPESP: 21/01700-2 - Uma teoria de campo eficaz de equilíbrio relativístico local
• Beneficiário: Donato Giorgio Torrieri
• Modalidade de apoio: Auxílio à Pesquisa - Regular