On the Emerging Phenomenology of (a
نویسنده
چکیده
We discuss phenomenology of the vacuum condensate 〈(Aμ)min〉 in pure gauge theories, where Aμ is the gauge potential. Both Abelian and non-Abelian cases are considered. In case of the compact U(1) the non-perturbative part of the condensate 〈(Aμ)min〉 is saturated by monopoles. In the non-Abelian case, a two-component picture for the condensate is presented according to which finite values of order ΛQCD are associated both with large and short distances. We obtain a lower bound on the 〈(Aμ)min〉 by considering its change at the phase transition. Numerically, it produces an estimate similar to other measurements. Possible physical manifestations of the condensate are discussed.
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تاریخ انتشار 2000