Journal
PHYSICAL REVIEW D
Volume 81, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.81.034022
Keywords
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Funding
- Ministry of Education, Culture, Sports, Science and Technology of Japan [20340047, 20105001, 20105003]
- Nagoya University
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We consider chiral perturbation theory with a nonzero theta term. Because of the CP violating term, the vacuum of chiral fields is shifted to a nontrivial element on the SU(N-f) group manifold. The CP violation also provides mixing of different CP eigenstates, between scalar and pseudoscalar, or vector and axialvector, operators. We investigate up to O(theta(2)) effects on the mesonic two-point correlators of chiral perturbation theory to the one-loop order. We also address the effects of fixing topology, by using saddle-point integration in the Fourier transform with respect to theta.
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