Results 31 to 40 of about 25,991 (134)

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

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

The Pseudoscalar Meson Mass to Two Loops in Three-Flavor Partially Quenched $\chi$PT

, 2004
This paper presents a first study of the pseudoscalar meson masses to two loops, or NNLO, within the supersymmetric formulation of partially quenched chiral perturbation theory (PQ$\chi$PT).
F. Farchioni, J. Bijnens, J. Bijnens, J. Bijnens, Johan Bijnens, Niclas Danielsson, Timo A. Lähde   +6 more
core   +1 more source

Pseudoscalar mesons in hot, dense matter [PDF]

Physical Review C, 2004
33 pages, 12 figures, PRC ...
Yu. L. Kalinovsky, Pedro Costa, M. C. Ruivo, C. A. de Sousa   +3 more
openaire   +3 more sources

Chiral dynamics in U(3) unitary chiral perturbation theory [PDF]

, 2012
We perform a complete one-loop calculation of meson-meson scattering, and of the scalar and pseudoscalar form factors in U(3) chiral perturbation theory with the inclusion of explicit resonance fields.
Albaladejo, Bernard, Colangelo, Collins, Di Vecchia, Dobado, Dobado, Ecker, Ecker, Ecker, Gasser, Gasser, Guo, Guo, Guo, Herrera-Siklody, J. Ruiz de Elvira, J.A. Oller, Jamin, Jamin, Jido, Kaiser, Llanes-Estrada, Meißner, Nakamura, Oller, Oller, Oller, Oller, Oller, Oller, Oller, Pelaez, Peláez, Peláez, Peláez, Pich, Rosenzweig, Weinberg, Weinberg, Weinberg, Witten, Witten, Witten, Zhi-Hui Guo, ʼt Hooft   +45 more
core   +2 more sources

Distribution amplitudes of pseudoscalar mesons

, 2006
Presented at XXIV International Symposium on Lattice Field Theory, July 23-28 2006, Tucson Arizona ...
Braun, Vladimir M., Göckeler, Meinulf, Horsley, Roger, Perlt, H., Pleiter, Dirk, Rakow, Paul E. L, Schierholz, Gerrit, Schiller, A., Schroers, W., Stüben, Hirnnerk, Zanotti, James M.   +10 more
openaire   +3 more sources

The annihilation of virtual photons into pseudoscalar mesons [PDF]

The European Physical Journal C, 2001
We investigate the possibility to constrain the pion distribution amplitude from the gamma* gamma* -> pi transition. For a surprisingly large range in the two photon virtualities we find that the transition form factor is essentially independent of the distribution amplitude. This in turn entails a parameter-free prediction of QCD. The gamma* gamma*
Diehl, M., Kroll, P., Vogt, C.
openaire   +5 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

Pseudoscalar Mesons and Emergent Mass

Few-Body Systems
AbstractDespite its role in the continuing evolution of the Universe, only a small fraction of the mass of visible material can be attributed to the Higgs boson alone. The overwhelmingly dominant share may/should arise from the strong interactions that act in the heart of nuclear matter; namely, those described by quantum chromodynamics.
Raya, Khépani, Bashir, Adnan, Binosi, Daniele, Roberts, Craig D., Rodríguez Quintero, José   +4 more
openaire   +3 more sources

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., Khemchandani, K. P., Nagahiro, H., Torres, A. Martínez   +3 more
core   +1 more source