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2009

Chiral perturbation theory in a theta vacuum

Aoki, Sinya, Fukaya, Hidenori

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We consider chiral perturbation theory (ChPT) with a non-zero theta term.

Due to the CP violating term, the vacuum of chiral fields is shifted to a non-trivial 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 upto O(theta^2) effects on the mesonic two point correlators of ChPT to the one-loop order.

Chiral perturbation theory in a theta vacuum · Around

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