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- W2158954923 abstract "AbstractWe review briefly some well known facts about trace anomaly and thenconcentrate on its ’infrared’ manifestation. Among other things we show bymeans of dispersion relations that dilatations and translations are conflictingsymmetries. We discuss the occurrence of some subtraction constants in con-vergent dispersion relations and illustrate it on the process H → γγ in theelectroweak theory. 1 Physical aspects From the beginning of 1970’s we know that dilatation and conformal symmetries ofquantum field theories in flat space-time are in general broken by quantum effects[1, 2, 3, 4]. The corresponding Noether currents thus possess anomalous divergences.This phenomenon has some important physical consequences. First it explains natu-rally fairly large hadronic masses (see e.g. [5]). It also allows one to make interestinglow-energy predictions for various matrix elements [6].Another physical case [2], known for a long time, concerns the asymptotic be-haviour of the basic QCD observable R(s) which in the lowest order is simply givenby the quark-parton model (QPM)R(s) ≡σ" @default.
- W2158954923 created "2016-06-24" @default.
- W2158954923 creator A5082741356 @default.
- W2158954923 date "1998-09-25" @default.
- W2158954923 modified "2023-09-27" @default.
- W2158954923 title "Some Aspects of Trace Anomaly" @default.
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- W2158954923 hasPublicationYear "1998" @default.
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