Read e-book online Confinement, Duality, and Non-Perturbative Aspects of QCD PDF

By Pierre van Baal

ISBN-10: 0306458268

ISBN-13: 9780306458262

ISBN-10: 030647056X

ISBN-13: 9780306470561

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Extra resources for Confinement, Duality, and Non-Perturbative Aspects of QCD (NATO Science Series: B:)

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However in the real world we expect the tensors to have narrower decay widths than the scalars because their decays into light pseudoscalars require non-zero angular momentum and corresponding near-threshold suppression factors. Thus they should be easier to identify experimentally - and that is their interest for us here. Experimentally we find the following lightest tensor states20. There is an isoscalar with width, , a second isoscalar , an isovector and a strange isodoublet The first isoscalar decays mainly into pions while the second decays mainly into strange mesons.

So we drop the mass corresponding to the largest value of a and try again. We keep doing this until we get a good fit. ) Such lattice spacings are small enough that we are not surprised that higher order terms in should be small. We show the mass ratios in Fig. 1 together with the best fit of the form in eq. (2). We obtain the continuum mass ratio: The fit is obviously a very good one (with a confidence level of 85%) and it is clear that the calculations of the different groups are entirely consistent with each other.

Kenway (UKQCD Collaboration), Nucl. Phys. B (Proc. ) 53 (1997) 206. 25. A. Rowland, Nucl. Phys. B (Proc. Suppl,) 53 (1997) 308. 26. M. Lüscher et al. (Alpha Collaboration), DESY preprint 96-222, hep-lat/9611015. 27. M. Lüscher et al. (Alpha Collaboration), Nucl. Phys. B491 (1997) 323. 28. S. Sint and P. Weisz, FSU preprint FSU-SCRI-97-24, hep-lat/9704001. 29. J. Gasser and H. Leutwyler, Phys. Rep. C87 (1982) 108. 40 30. 31. 32. 33. 34. 35. 36. S. Aoki and A. Gocksch, Phys. Rev. D45 (1992) 3845.

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Confinement, Duality, and Non-Perturbative Aspects of QCD (NATO Science Series: B:) by Pierre van Baal


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