共查询到20条相似文献,搜索用时 31 毫秒
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《Nuclear Physics B》2006,732(3):444-462
In this paper we discuss representations of the Birman–Wenzl–Murakami algebra as well as of its dilute extension containing several free parameters. These representations are based on superalgebras and their baxterizations permit us to derive novel trigonometric solutions of the graded Yang–Baxter equation. In this way we obtain the multiparametric R-matrices associated to the , and quantum symmetries. Two other families of multiparametric R-matrices not predicted before within the context of quantum superalgebras are also presented. The latter systems are indeed non-trivial generalizations of the vertex model when both distinct edge variables statistics and extra free-parameters are admissible. 相似文献
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《Physics letters. [Part B]》2006,643(6):336-341
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Stephan Narison 《Physics letters. [Part B]》2013,718(4-5):1321-1333
Using recent values of the QCD (non-)perturbative parameters given in Table 1 and an estimate of the N3LO QCD perturbative contributions based on the geometric growth of the PT series, we re-use QCD spectral sum rules (QSSR) known to N2LO PT series and including all dimension-six NP condensate contributions in the full QCD theory, for improving the existing estimates of and from the open charm and beauty systems. We especially study the effects of the subtraction point on “different QSSR data” and use (for the first time) the Renormalization Group Invariant (RGI) scale-independent quark masses in the analysis. The estimates [rigourous model-independent upper bounds within the SVZ framework] reported in Table 8: , and , , which improve previous QSSR estimates, are in perfect agreement (in values and precisions) with some of the experimental data on and on recent lattice simulations within dynamical quarks. These remarkable agreements confirm both the success of the QSSR semi-approximate approach based on the OPE in terms of the quark and gluon condensates and of the Minimal Duality Ansatz (MDA) for parametrizing the hadronic spectral function which we have tested from the complete data of the and ? systems. The values of the running quark masses and from are in good agreement though less accurate than the ones from recent and ? sum rules. 相似文献
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Jussi Kalkkinen 《Nuclear Physics B》2006,740(3):328-347
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《Nuclear Physics B》2006,732(3):463-486
Starting from critical RSOS lattice models with appropriate inhomogeneities, we derive two component nonlinear integral equations to describe the finite volume ground state energy of the massive perturbation of the coset models. When while the value of k is fixed, the equations correspond to the current–current perturbation of the WZW model. Then modifying one of the kernel functions of these equations, we propose two component nonlinear integral equations for the fractional supersymmetric sine-Gordon models. The lattice versions of our equations describe the finite size effects in the corresponding lattice models, namely in the critical models, in the isotropic higher-spin vertex models, and in the anisotropic higher-spin vertex models. Numerical and analytical checks are also performed to confirm the correctness of our equations. These type of equations make it easier to treat the excited state problem. 相似文献
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Luke M. Butcher 《Physics letters. A》2018,382(36):2555-2560
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