Can the axions of standard-like superstring models solve the strong CP problem?
نویسندگان
چکیده
منابع مشابه
The Strong CP Problem and Axions
I describe how the QCD vacuum structure, necessary to resolve the U(1)A problem, predicts the presence of a P, T and CP violating term proportional to the vacuum angle θ̄. To agree with experimental bounds, however, this parameter must be very small (θ̄ ≤ 10). After briefly discussing some possible other solutions to this, so-called, strong CP problem, I concentrate on the chiral solution propose...
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15 صفحه اولQcd, Strong Cp and Axions
The physical origin of the strong CP problem in QCD, rooted in the structures of the vacuum of the standard model, is reviewed. The chiral solution to this problem, with its accompanying axion, is explained and various characteristics of axions are detailed. Although visible axion models are excluded experimentally, models with very light and very weakly coupled axions are still tenable. The as...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1993
ISSN: 0370-2693
DOI: 10.1016/0370-2693(93)90460-y