منابع مشابه
On Group Averaging for SO(n,1)
The technique known as group averaging provides powerful machinery for the study of constrained systems. However, it is likely to be well defined only in a limited set of cases. Here, we investigate the possibility of using a ‘renormalized’ group averaging in certain models. The results of our study may indicate a general connection between superselection sectors and the rate of divergence of t...
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We review some aspects of the use of a technique known as group averaging, which provides a tool for the study of constrained systems. We focus our attention on the case where the gauge group is non–compact, and a ‘renormalized’ group averaging method must be introduced. We discuss the connection between superselection sectors and the rate of divergence of the group averaging integral.
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Perturbative gravity about global de Sitter space is subject to linearizationstability constraints. Such constraints imply that quantum states of matter fields couple consistently to gravity only if the matter state has vanishing de Sitter charges; i.e., only if the state is invariant under the symmetries of de Sitter space. As noted by Higuchi, the usual Fock spaces for matter fields contain n...
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In the context of the local Langlands philosopy for R, Adams, Barbasch and Vogan describe a bijection between the simple Harish-Chandra modules for a real reductive group G(R) and the space of “complete geometric parameters”—a space of equivariant local systems on a variety on which the Langlands-dual of G(R) acts. By a conjecture of Soergel, this bijection can be enhanced to an equivalence of ...
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This article reports world averages for measurements on b-hadron properties obtained by the Heavy Flavor Averaging Group (HFAG) using the available results as of summer 2004 conferences. In the averaging, the input parameters used in the various analyses are adjusted (rescaled) to common values, and all known correlations are taken into account. The averages include b-hadron lifetimes, B-oscill...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics D
سال: 1999
ISSN: 0218-2718,1793-6594
DOI: 10.1142/s0218271899000365