A note on W_{2,s} strings

Details A note on W_{2,s} strings A note on W_{2,s} strings

1994-02-23

arxiv.org/abs/hep-th/9402133v1

Phys.Lett.B327:241-248,1994

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, CTP TAMU-8/94, LZU-TH-94/02

Scientific paper

10.1016/0370-2693(94)90724-2

BRST operators for two-dimensional theories with spin-2 and spin-$s$ currents, generalising the $W_3$ BRST operator of Thierry-Mieg, have previously been obtained. The construction was based on demanding nilpotence of the BRST operators, making no reference to whether or not an underlying $W$ algebra exists. In this paper, we analyse the known cases ($s=3$, 4, 5 and 6), showing that the two $s=4$ BRST operators are associated with the $W\!B_2$ algebra, and that two of the four $s=6$ BRST operators are associated with the $W\!G_2$ algebra. We discuss the cohomology of all the known higher-spin BRST operators, the Weyl symmetry of their physical states, and their relation with certain minimal models. We also obtain the BRST operator for the case $s=7$.

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