Anomaly cancellation in M-theory: a critical review
نویسندگان
چکیده
منابع مشابه
Anomaly cancellation in M - theory
We show the complete cancellation of gauge and gravitational anomalies in the Mtheory of Horava and Witten using their boundary contribution, and a term coming from the existence of two and five-branes. A factor of three discrepancy noted in an earlier work is resolved. We end with a comment on flux quantization. e-mail: [email protected] In the M-theory of Horava and Witten [1] sever...
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We present calculation of the anomaly cancellation in M–theory on orbifolds S/ZZ2 and T /ZZ2 in the upstairs approach. The main requirement that allows one to uniquely define solutions to the modified Bianchi identities in this case is that the field strength G be globally defined on S1 or T 5 and properly transforming under ZZ2. We solve for general G that satisfies these requirements and expl...
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We study gravitational anomalies for fivebranes in M theory. We show that an apparent anomaly in diffeomorphisms acting on the normal bundle is cancelled by a careful treatment of the M theory Chern-Simons coupling in the presence of fivebranes. One interesting aspect of our treatment is the way in which a magnetic object (the fivebrane) is smoothed out through coupling to gravity and the resul...
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This paper deals with magnetic equations of the type dH = J where the current J is a δ–function on a brane worldvolume and H a p–form field strength. In many situations in M–theory this equation needs to be solved for H in terms of a potential. A standard universality class of solutions, involving Dirac–branes, gives rise to strong intermediate singularities in H which in many physically releva...
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2003
ISSN: 0550-3213
DOI: 10.1016/j.nuclphysb.2003.10.002