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Width of the confining string in Yang-Mills theory
1Dipartimento di Fisica Teorica, Università di Torino, and INFN, Sezione di Torino, via P. Giuria 1, 10125 Torino, Italy.
Abstract:
We investigate the transverse fluctuations of the confining string connecting two static quarks in (2+1)D SU(2) Yang-Mills theory using Monte Carlo calculations. The exponentially suppressed signal is extracted from the large noise by a very efficient multilevel algorithm. The resulting width of the string increases logarithmically with the distance between the static quark charges. Corrections at intermediate distances due to universal higher-order terms in the effective string action are calculated analytically. They accurately fit the numerical data.
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