Phys. Rev. Lett. 60, 1599–1601 (1988)Where the sign of the metric makes a differenceSee Also: Erratum Received 15 September 1987; published in the issue dated 18 April 1988 The groups Pin(n,m) and Pin(m,n) are not isomorphic, and the obstruction classes to their respective bundles are different. It follows that for nonorientable superstring theories the contributions to a Polyakov path integral from surfaces with positive metric are different from the contributions from those with negative metrics. © 1988 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.60.1599
DOI:
10.1103/PhysRevLett.60.1599
PACS:
02.40.+m, 11.17.+y
See AlsoErratum: Steven Carlip and Cécile DeWitt-Morette, Where the Sign of the Metric Makes a Difference, Phys. Rev. Lett. 60, 2704 (1988). |
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