TY - JOUR
T1 - String loop corrections to beta functions
AU - Callan, Curtis Gove
AU - Lovelace, C.
AU - Nappi, C. R.
AU - Yost, S. A.
N1 - Funding Information:
It is natural to ask whether this method can be generalized to deal with the effects of string loop (i.e. quantum) corrections. There is a well-defined string-loop expansion parameter, e ~ (where ~ is the background dilaton field) and it is plausible both that the background field equations of motion should have a power series expansion in e -~ and that they be derivable from a spacetime effective action, itself having a power series expansion in e ~. What is not clear is whether such loop-corrected equations of motion could be interpreted as the conformal invariance conditions of some appropriately generalized two-dimensional field theory. A posi- 1 Supported in part by DOE grant DE-AC02-76ER-03072. 2 On leave from Rutgers University. Supported in part by NSF grant PHY84-15534. 3 Supported in part by NSF grant PHY-80-19754.
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 1987
Y1 - 1987
N2 - We study the problem of finding the beta functions, and the associated spacetime effective action, for interacting open and closed strings propagating in background fields. String loop divergences play a crucial role in this problem. Cancelling them against sigma model divergences gives a consistent set of loop-corrected beta functions, which can be derived from a simple generalization of the string-tree-level effective action. This suggests the existence of new string theories which are conformally invariant only after all world sheets have been summed.
AB - We study the problem of finding the beta functions, and the associated spacetime effective action, for interacting open and closed strings propagating in background fields. String loop divergences play a crucial role in this problem. Cancelling them against sigma model divergences gives a consistent set of loop-corrected beta functions, which can be derived from a simple generalization of the string-tree-level effective action. This suggests the existence of new string theories which are conformally invariant only after all world sheets have been summed.
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U2 - 10.1016/0550-3213(87)90227-6
DO - 10.1016/0550-3213(87)90227-6
M3 - Article
AN - SCOPUS:0000464617
SN - 0550-3213
VL - 288
SP - 525
EP - 550
JO - Nuclear Physics, Section B
JF - Nuclear Physics, Section B
IS - C
ER -