By Sam B. Treiman, Roman Jackiw

ISBN-10: 0691083975

ISBN-13: 9780691083971

Present algebra is still our such a lot profitable research of basic particle interactions. This choice of surveys on present algebra and anomalies is a successor quantity to Lectures On present Algebra And Its functions. because the conception is to a wide quantity version self sufficient, prior effects have retained their validity, whereas quantum chromodynamics and the electro-weak unification offer a dynamical foundation.

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Mat. Fiz. 43, 210 (1980)] j N. Marcus and A. Sagnotti, Nuovo Cim. A 87, 1 (1985). [81] L. Brink, S. S. Kim and P. 2993 [hep-th]]. [82] R. Kallosh and M. Soroush, Nucl. Phys. 4106 [hep-th]]. [83J M. Bianchi, H. Elvang and D. Z. 0757 [hep-th]]. [84] R. Kallosh and T. 3414 [hep-th]]. [85] R. Kallosh, C. H. Lee and T. 3417 [hep-thJ]. [86] S. He and H. 4533 [hep-th]. [87] J. Brodel and L. J . 5704 [hep-th]]. [88] M. Bianchi, S. Ferrara and R. 0057 [hep-th]]. CHAIRMAN: L. J. DIXON Scientific Secretaries: V.

Given two QFTs X and Y, are they in the same component? If so, is the path between them "finite length" or "infinite length" ? • How "big" is theory space? Can we show that the number of QFTs satisfying some conditions is finite, and estimate the number? • How many parameters (or measurements) do we need to characterize a QFT? At weak coupling, we can answer this, but more generally? These are analogous to mathematical questions about manifolds which can be answered. Indeed, there has been a lot of progress in this type of mathematics, namely the theory of spaces of Riemannian manifolds, and Ricci flow.

A. Kosower, Phys. Lett. B 394, 105 (1997) [hep-th/9611127J. [62J Z. Bern, L. J . Dixon and D. A. Kosower, JHEP 0001, 027 (2000) [hep-ph/0001001]i JHEP 0408, 012 (2004) [hep-ph/0404293]. [63] Z. Bern, L. J. Dixon and D. A. Kosower, Nucl. Phys. B 513, 3 (1998) [hep-ph/9708239]. [64J R. Britto, F. Cachazo and B. Feng, Nucl. Phys. B 115, 499 (2005) [hep-th/0412308]; R. Britto, F. Cachazo, B. Feng and E. Witten, Phys. Rev. Lett. 94, 181602 (2005) [hepth/0501052]. [65J Z. Bern, L. J. Dixon and D. A. Kosower, Phys.

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