ar X iv : h ep - p h / 02 02 17 1 v 2 2 8 M ar 2 00 2 UT - 02 - 09 Higher - Dimensional QCD without the Strong CP Problem
نویسندگان
چکیده
QCD in a five-dimensional sliced bulk with chiral extra-quarks on the boundaries is generically free from the strong CP problem. Accidental axial symmetry is naturally present except for suppressed breaking interactions, which plays a role of the Peccei-Quinn symmetry to make the strong CP phase sufficiently small.
منابع مشابه
ar X iv : h ep - p h / 02 02 17 1 v 1 1 8 Fe b 20 02 UT - 02 - 09 Higher - Dimensional QCD without the Strong CP Problem
QCD in a five-dimensional sliced bulk with chiral extra-quarks on the boundaries is generically free from the strong CP problem. Accidental axial symmetry is naturally present except for suppressed breaking interactions, which plays a role of the Peccei-Quinn symmetry to make the strong CP phase sufficiently small.
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