Mesonic Low-Energy Constants
نویسندگان
چکیده
منابع مشابه
Mesonic low-energy constants
We review the status of the coupling constants of chiral Lagrangians in the meson sector, the so-called low-energy constants (LECs). Special emphasis is put on the chiral SU(2) and SU(3) Lagrangians for the strong interactions of light mesons. The theoretical and experimental input for determining the corresponding LECs is discussed. In the two-flavour sector, we review the knowledge of the O(p...
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The progress in determining the coupling constants of mesonic chiral Lagrangians is reviewed, with emphasis on the work performed in three successive European Networks (Eurodaphne I and II, Euridice). Reliable estimates of those constants are essential for making full use of next-to-next-to-leading-order calculations in chiral perturbation theory. The precision in the values of the strong coupl...
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Lattice NRQCD with leading finite lattice spacing errors removed is used to calculate decay constants of mesons made up of heavy quarks. Quenched simulations are done with a tadpole improved gauge action containing plaquette and six-link rectangular terms. The tadpole factor is estimated using the Landau link. For each of the three values of the coupling constant considered, quarkonia are calcu...
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The branching ratios of the measured decay KL → ππee and of the still unmeasured decay K → ππee are calculated to next-to-leading order in Chiral Perturbation Theory (CHPT). Recent experimental results are used to determine two possible values of the combination (N r 16 −N17) of weak lowenergy couplings (LECs) from the O(p4) chiral Lagrangian. The obtained values are compared to the predictions...
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ژورنال
عنوان ژورنال: Annual Review of Nuclear and Particle Science
سال: 2014
ISSN: 0163-8998,1545-4134
DOI: 10.1146/annurev-nucl-102313-025528