Mass renormalization in string theory: special states

被引：0
作者：
Roji Pius
Arnab Rudra
Ashoke Sen
机构：
[1] Harish-Chandra Research Institute,
[2] Department of Applied Mathematics and Theoretical Physics,undefined
来源：
Journal of High Energy Physics | / 2014卷
关键词：
Superstrings and Heterotic Strings; Bosonic Strings;
D O I：
暂无
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学科分类号：
摘要：
String theory gives a well defined procedure for computing the S-matrix of BPS or a class of massless states, but similar calculation for general massive states is plagued with difficulties due to mass renormalization effect. In this paper we describe a procedure for computing the renormalized masses and S-matrix elements in bosonic string theory for a special class of massive states which do not mix with unphysical states under renormalization. Even though this requires working with off-shell amplitudes which are ambiguous, we show that the renormalized masses and S-matrix elements are free from these ambiguities. We also argue that the masses and S-matrix elements for general external states can be found by examining the locations of the poles and the residues of the S-matrix of special states. Finally we discuss generalizations to heterotic and superstring theories.
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