Multiloop Amplitudes of Light-cone Gauge Bosonic String Field Theory in Noncritical Dimensions

Ishibashi, Nobuyuki; Murakami, Koichi

doi:10.1007/JHEP09(2013)053

Multiloop Amplitudes of Light-cone Gauge Bosonic String Field Theory in Noncritical Dimensions

Jul 23, 2013

39 pages

Published in:

JHEP 09 (2013) 053

Published: 2013

e-Print:

1307.6001 [hep-th]

DOI:

10.1007/JHEP09(2013)053

Report number:

UTHEP-659,
OIQP-13-12

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Abstract: (arXiv)

We study the multiloop amplitudes of the light-cone gauge closed bosonic string field theory for

d \neq 26

. We show that the amplitudes can be recast into a BRST invariant form by adding a nonstandard worldsheet theory for the longitudinal variables

X^{\pm}

and the reparametrization ghost system. The results obtained in this paper for bosonic strings provide a first step towards the examination whether the dimensional regularization works for the multiloop amplitudes of the light-cone gauge superstring field theory.

Note:

45 pages, 8 figures; v2: references and clarifications added

String Field Theory
Conformal Field Models in String Theory
BRST Symmetry
string model: boson
field theory: string
invariance: Becchi-Rouet-Stora
regularization: dimensional
light cone gauge
reparametrization
superstring

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