Results 51 to 60 of about 28,157 (248)

Amplitude ambiguities in pseudoscalar meson photoproduction [PDF]

Physical Review C, 1996
7 ...
Keaton, Greg, Workman, Ron
openaire   +3 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., Martynenko A. P., Martynenko F. A., Radzhabov 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
core   +1 more source

Excited vector mesons: phenomenology and predictions for a yet unknown vector ss state with a mass of about 1.93 GeV

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

Towards a precise determination of the scattering amplitudes of the charmed and light-flavor pseudoscalar mesons

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, Liuming Liu, Ulf-G. Meißner, J. A. Oller, A. Rusetsky   +4 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

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, Pena Carlos, Preti David, Romero José Ángel, Ugarrio Javier   +4 more
doaj   +1 more source

ON THE COMPLEXION OF PSEUDOSCALAR MESONS [PDF]

International Journal of Modern Physics A, 2005
A strongly momentum-dependent dressed-quark mass function is basic to QCD. It is central to the appearance of a constituent-quark mass-scale and an existential prerequisite for Goldstone modes. Dyson-Schwinger equation (DSEs) studies have long emphasised this importance, and have proved that QCD's Goldstone modes are the only pseudoscalar mesons to ...
Hoell, A., Krassnigg, A., Roberts, C. D., Wright, S. V.   +3 more
openaire   +2 more sources

Negative Parity N* Resonances in an Extended GBE

, 2003
In this paper, we calculate the masses and mixing angles of L=1 negative parity N* resonances in an extended GBE (Goldstone-boson-exchange model) with harmonic-oscillator wave functions.
Brodsky, Brown, Capstick, Chizma, Chodos, Close, De Rújula, Glozman, Glozman, Hernández, Hey, Isgur, Isgur, Isgur, Isgur, Isgur, Isgur, Isgur, Jun He, Koniuk, McClary, Vento, Wagenbrunn, Wagenbrunn, Wagenbrunn, Ya Glozman, Yu-Bing Dong   +26 more
core   +1 more source

Radiative decays of mesons in the NJL model [PDF]

, 2001
We revisit the theoretical predictions for anomalous radiative decays of pseudoscalar and vector mesons. Our analysis is performed in the framework of the Nambu-Jona-Lasinio model, introducing adequate parameters to account for the breakdown of chiral ...
Dumm, D. Gomez, Epele, L., Fanchiotti, H., Grunfeld, A. G.   +3 more
core   +3 more sources