On one-loop correction to energy of spinning strings in S^5

A.A. Tseytlin; I.Y. Park; S.A. Frolov

On one-loop correction to energy of spinning strings in S⁵

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arxiv hep-th/0408187 v2 pith:3BL5IOLF submitted 2004-08-24 hep-th

On one-loop correction to energy of spinning strings in S⁵

S.A. Frolov , I.Y. Park , A.A. Tseytlin This is my paper

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We revisit the computation (hep-th/0306130) of 1-loop AdS_5 x S^5 superstring sigma model correction to energy of a closed circular string rotating in S^5. The string is spinning around its center of mass with two equal angular momenta J_2=J_3 and its center of mass angular momentum is J_1. We revise the argument in hep-th/0306130 that the 1-loop correction is suppressed by 1/J factor (J= J_1 + 2 J_2 is the total SO(6) spin) relative to the classical term in the energy and use numerical methods to compute the leading 1-loop coefficient. The corresponding gauge theory result is known (hep-th/0405055) only in the J_1=0 limit when the string solution becomes unstable and thus the 1-loop shift of the energy formally contains an imaginary part. While the comparison with gauge theory may not be well-defined in this case, our numerical string theory value of the 1-loop coefficient seems to disagree with the gauge theory one. A plausible explanation should be (as in hep-th/0405001) in the different order of limits taken on the gauge theory and the string theory sides of the AdS/CFT duality.

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