Results 51 to 60 of about 27,828 (268)
Effective masses of diquarks [PDF]
, 2002 We study meson and diquark bound states using the rainbow-ladder truncation of QCD's Dyson-Schwinger equations. The infrared strength of the rainbow-ladder kernel is described by two parameters.
Maris, P.
core +2 more sources
Effects of light-by-light scattering in the Lamb shift and hyperfine structure of muonic hydrogen [PDF]
EPJ Web of Conferences, 2019 We calculate the meson exchange contribution to the interaction operator of muon and proton, which is determined by the meson coupling with two photon state.
Dorokhov A. E. +3 more
doaj +1 more source
Heavy Meson Masses in the \epsilon-Regime of HM\chi PT
, 2011 The pseudoscalar and vector heavy meson masses are calculated in the \epsilon-regime of Heavy Meson Chiral Perturbation Theory to order \epsilon^4. The results of this calculation will allow the determination of low-energy coefficients (LECs) directly ...
C. G. Boyd, L. Liu, Raúl A. Briceño
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Relics of Supersymmetry in Ordinary 1-flavor QCD: Hairpin Diagrams and Scalar-Pseudoscalar Degeneracy [PDF]
, 2007 The large-$N_c$ orientifold planar equivalence between $\mathcal{N}=1$ SUSY Yang-Mills theory and ordinary 1-flavor QCD suggests that low-energy quark-gluon dynamics in QCD should be constrained by the supersymmetry of the parent theory.
Keith-Hynes, Patrick, Thacker, H. B.
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EPJ Web of Conferences, 2018 The firm understanding of standard quark-antiquark states (including excited states) is necessary to search for non-conventional mesons with the same quantum numbers.
Piotrowska M., Giacosa F.
doaj +1 more source
European Physical Journal C: Particles and Fields, 2019 We study the scattering of the light-flavor pseudoscalar mesons ($$\pi , K, \eta $$ π,K,η ) off the ground-state charmed mesons ($$D,D_s$$ D,Ds ) within chiral effective field theory.
Zhi-Hui Guo +4 more
doaj +1 more source
Low-lying even parity meson resonances and spin-flavor symmetry [PDF]
, 2010 A study is presented of the $s-$wave meson-meson interactions involving members of the $\rho-$nonet and of the $\pi-$octet. The starting point is an SU(6) spin-flavor extension of the SU(3) flavor Weinberg-Tomozawa Lagrangian.
A. V. Manohar +6 more
core +2 more sources
A tmQCD mixed-action approach to flavour physics
EPJ Web of Conferences, 2018 We discuss a mixed-action approach in which sea quarks are regularised using non-perturbatively O(a) improved Wilson fermions, while a fully-twisted tmQCD action is used for valence quarks.
Herdoíza Gregorio +4 more
doaj +1 more source
Role of vector and pseudoscalar mesons in understanding $1/2^-$ $N^*$ and $\Delta$ resonances
, 2013 A study of nonstrange meson-baryon systems has been made with the idea of understanding the properties of the low-lying $1/2^-$ $N^*$ and $\Delta$ resonances.
Hosaka, A. +3 more
core +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 +1 more source