Results 71 to 80 of about 57,829 (262)

Bilocal Field Approach and Semileptonic Heavy Meson Decays

, 1992
In this paper we consider the bilocal field approach for $QCD$. We obtain a bilocal effective meson action with a potential kernel given in relativistic covariant form.
Kalinovsky, Yu. L., Kaschluhn, L.
core   +2 more sources

SU(3) analysis of non-factorizable contributions to decays of Bottom mesons emitting two pseudoscalar mesons [PDF]

arXiv, 2023
Two-body weak decays of bottom mesons into two pseudoscalar mesons are examined employing SU(3) flavor symmetry for the nonfactorizable matrix elements. Using certain measured Cabibo-favored modes, we fix the reduced matrix elements and predict the branching ratios of the Cabibbo-angle favored and suppressed decays of B and Bs mesons.
arxiv  

Incompleteness of complete pseudoscalar-meson photoproduction [PDF]

Physical Review C, 2013
[Background] A complete set is a minimum set of observables which allows one to determine the underlying reaction amplitudes unambiguously. Pseudoscalar-meson photoproduction from the nucleon is characterized by four such amplitudes and complete sets involve single- and double-polarization observables.
Vrancx, Tom, Ryckebusch, Jan, Van Cuyck, Tom, Vancraeyveld, Pieter   +3 more
openaire   +4 more sources

Chiral Lagrangian Parameters for Scalar and Pseudoscalar Mesons

, 2003
The results of a high-statistics study of scalar and pseudoscalar meson propagators in quenched lattice QCD are presented. For two values of lattice spacing, $\beta=5.7$ ($a \approx .18$ fm) and 5.9 ($a \approx .12$ fm), we probe the light quark mass ...
A.X. El-Khadra, C. Bernard, D.B. Kaplan, E. Eichten, G.P. Lepage, H. Thacker, H. Wittig, J. Gasser, J. Heitger, J. Iizuka, J. Iizuka, J. Smit, N. Isgur, R. Frezzotti, R. Frezzotti, R. Narayanan, R. Narayanan, S. Okubo, S. Okubo, S. Prelovsek, S. Sharpe, S. Sharpe, S.R. Sharpe, T. Bhattacharya, V.I. Lesk, W. Bardeen, W. Bardeen, W. Bardeen, W. Bardeen, W. Bardeen, Y. Kuramashi   +30 more
core   +1 more source

Meson electromagnetic form factors

EPJ Web of Conferences, 2012
The electromagnetic structure of the pseudoscalar meson nonet is completely described by the sophisticated Unitary&Analytic model, respecting all known theoretical properties of the corresponding form factors.
Dubničková Anna Z., Dubnička Stanislav   +1 more
doaj   +1 more source

Pseudoscalar mesons and instantons [PDF]

Nuclear Physics B, 1983
Abstract We discuss the QCD sum rules for the correlators of pseudoscalar currents with quantum numbers of π, K, η, η′ mesons. In the framework of the instanton model of the QCD vacuum suggested earlier by the author, we calculate SU(3) breaking effects such as K, η masses and ηη′ mixing, as well as the U(1) breaking effect, the η′ mass.
openaire   +2 more sources

Mixing and decay constants of pseudoscalar mesons [PDF]

Physical Review D, 1998
14 pages, uses feynmp ...
Th. Feldmann, Berthold Stech, P. Kroll
openaire   +2 more sources

Mass Spectrum of Noncharmed and Charmed Meson States in Extended Linear-Sigma Model

Particles
The mass spectrum of different meson particles is generated using an effective Lagrangian of the extended linear-sigma model (eLSM) for scalar and pseudoscalar meson fields and quark flavors, up, down, strange, and charm.
Azar I. Ahmadov, Azzah A. Alshehri, Abdel Nasser Tawfik   +2 more
doaj   +1 more source

Chiral dynamics in form factors, spectral-function sum rules, meson-meson scattering and semilocal duality

, 2012
In this work, we perform the one-loop calculation of the scalar and pseudoscalar form factors in the framework of U(3) chiral perturbation theory with explicit tree level exchanges of resonances.
G. Grayer, H. Georgi, J. A. Oller, J. Ruiz de Elvira, P. Estabrooks, P. Pascual, P. D. B. Collins, Zhi-Hui Guo   +7 more
core   +1 more source

Chiral Properties of Pseudoscalar Mesons on a Quenched $20^4$ Lattice with Overlap Fermions [PDF]

, 2001
The chiral properties of the pseudoscalar mesons are studied numerically on a quenched $20^4$ lattice with the overlap fermion. We elucidate the role of the zero modes in the meson propagators, particularly that of the pseudoscalar meson.
Dong, S. J., Draper, T., Horvath, I., Lee, F. X., Liu, K. F., Zhang, J. B.   +5 more
core   +3 more sources