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Getting to grips with hadrons
No full textA short discussion concerning the lattice QCD approach to physics of hadrons is made to non-specialists. A special attention is given to topics that are of particular interest to the nuclear physics community.PACS: 11.15.Ha Lattice Gauge Theory – 12.39.Fe Chiral Lagrangian
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
B-parameters of the complete set of matrix elements of DB = 2 operators from the lattice
No full textWe compute on the lattice the 'bag' parameters of the five Delta-B = 2 operators of the supersymmetric basis, by combining their values determined in full QCD and in the static limit of HQET. The extrapolation of the QCD results from the accessible heavy-light meson masses to the B-meson mass is constrained by the static result. The matching of the corresponding results in HQET and in QCD is for the first time made at NLO accuracy in the MS over bar (NDR) renormalization scheme. All results are obtained in the quenched approximation
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