Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-09-12
Phys.Lett.B629:102-110,2005
Physics
High Energy Physics
High Energy Physics - Theory
12 pages, v2, v3: minor corrections, footnotes and references added, v3: to appear in Phys. Lett. B
Scientific paper
10.1016/j.physletb.2005.09.054
Recently, it was demonstrated that one-loop energy shifts of spinning superstrings on AdS5xS5 agree with certain Bethe equations for quantum strings at small effective coupling. However, the string result required artificial regularization by zeta-function. Here we show that this matching is indeed correct up to fourth order in effective coupling; beyond, we find new contributions at odd powers. We show that these are reproduced by quantum corrections within the Bethe ansatz. They might also identify the "three-loop discrepancy" between string and gauge theory as an order-of-limits effect.
Beisert Niklas
Tseytlin Arkady A.
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