TY - JOUR
T1 - Using reparametrization invariance to define vacuum infinities in string path integrals
AU - Callan, Curtis Gove
AU - Thorlacius, L.
N1 - Funding Information:
* Work supported by the Department of Energy, contract DE-AC03-76SF00515. ** Supported in part by DOE grant DE-AC02-84-15534.
PY - 1989/6/5
Y1 - 1989/6/5
N2 - Path integrals for interacting world sheet sigma models play a key role in string theory. For open strings, the relevant path integral is one-dimensional and has direct physical interpretation as a source term for closed string fields. This means that the vacuum divergences (Möbius infinities) of the path integral must be renormalized correctly. In this paper we show that reparametrization invariance Ward identities, apart from specifying the equations of motion of space-time background gauge fields, also serve to fix the renormalization scheme of the vacuum divergences.
AB - Path integrals for interacting world sheet sigma models play a key role in string theory. For open strings, the relevant path integral is one-dimensional and has direct physical interpretation as a source term for closed string fields. This means that the vacuum divergences (Möbius infinities) of the path integral must be renormalized correctly. In this paper we show that reparametrization invariance Ward identities, apart from specifying the equations of motion of space-time background gauge fields, also serve to fix the renormalization scheme of the vacuum divergences.
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U2 - 10.1016/0550-3213(89)90603-2
DO - 10.1016/0550-3213(89)90603-2
M3 - Article
AN - SCOPUS:0000956103
SN - 0550-3213
VL - 319
SP - 133
EP - 154
JO - Nuclear Physics, Section B
JF - Nuclear Physics, Section B
IS - 1
ER -