Algebraic vacuum limits of QCD condensates from in-medium projections of Lorentz tensors
Algebraic vacuum limits of QCD condensates from in-medium projections of Lorentz tensors
Buchheim, T.; Kämpfer, B.; Hilger, T.
Utilizing the in-medium Lorentz decomposition of operators generating QCD condensates we derive general constraints among the latter ones by the requirement of a smooth transition from medium to vacuum. In this way we relate the vacuum limits of heretofore unrelated condensates and provide consistency checks for the vacuum saturation hypothesis and the heavy quark mass expansion. The results are general and depend only on the rank and symmetry of the Lorentz tensors to be decomposed. The derived prescription enables to uniquely and directly identify operator product expansion contributions which are algebraically specific for in-medium situations and in particular useful for operators with a higher rank, i.e. larger than three. Four-quark condensates in mass dimension six are exemplified.
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Contribution to WWW
http://arxiv.org/abs/1511.06234 -
Journal of Physics G - Nuclear and Particle Physics 43(2016), 055105
DOI: 10.1088/0954-3899/43/5/055105
Cited 7 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-22731