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X-WR-CALNAME:Centre for Mathematical Sciences
X-ORIGINAL-URL:http://math-sciences.org
X-WR-CALDESC:Events for Centre for Mathematical Sciences
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TZOFFSETFROM:+0000
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DTSTART:20110101T000000
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DTSTART;TZID=UTC:20111208T160000
DTEND;TZID=UTC:20111208T170000
DTSTAMP:20211023T173638
CREATED:20151210T234322Z
LAST-MODIFIED:20151211T163430Z
UID:340-1323360000-1323363600@math-sciences.org
SUMMARY:Agostino Patella (CERN)
DESCRIPTION:k-String Tension and the 1/N Expansion\nI will address the question of whether the large-N expansion of the k-string tension in pure SU(N) gauge theories must contain only even powers of 1/N (as in the sine law)\, or whether odd-power contributions can also appear (as in Casimir scaling). A simple argument would suggest that\, since the Wilson loops in the reducible tensorial representation contain only even powers of 1/N\, the same should be true for the k-string tension. I will show that this argument is not correct and in general 1/N corrections are expected. The cancellation of the odd powers in 1/N for the tensorial reducible representation is nontrivial\, and it is generated by very different mechanisms in the open and closed string channels. I will substantiate this picture with a computation in the framework of the strong-coupling expansion for the lattice-discretized theory and I will discuss what results are expected to be valid in the continuum limit.
URL:http://math-sciences.org/event/agostino-patella-cern/
LOCATION:Room 205\, 2-5\, Kirkby Place\, Plymouth\, PL4 6DT\, United Kingdom
CATEGORIES:Seminars,Theoretical Physics
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