New solutions to the strong CP problem
نویسندگان
چکیده
منابع مشابه
Magnetic Monopoles As a New Solution to Strong CP Problem
A non-perturbative solution to strong CP problem is proposed. It is shown that the gauge orbit space with gauge potentials and gauge tranformations restricted on the space boundary in non-abelian gauge theories with a θ term has a magnetic monopole structure if there is a magnetic monopole in the ordinary space. The Dirac’s quantization condition in the corresponding quantum theories ensures th...
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We analyse the impact of quantum gravity on the possible solutions to the strong CP problem which utilize the spontaneously broken discrete symmetries, such as parity and time reversal invariance. We find that the stability of the solution under Planck scale effects provides an upper limit on the scale Λ of relevant symmetry breaking. This result is model dependent and the bound is most restric...
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The possibility of naturally suppressing strong CP-violation in the grand unified SU(5) model is examined. We show that a recent solution to the quark-lepton mass ratio problem by Georgi and Jarlskog can be extended in such a way as to yield a zero strong CP violating parameter 0 at the tree level and a small value for it coming from higher order effects, along with reasonable mass ratios and m...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2005
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2004.11.040