Results 91 to 100 of about 1,684,231 (310)

Self-consistent covariant description of vector meson decay constants and chirality-even quark-antiquark distribution amplitudes up to twist-3 in the light-front quark model [PDF]

, 2013
Although the meson decay amplitude described by a two-point function may be regarded as one of the simplest possible physical observables, it is interesting that this apparently simple amplitude bears abundant fundamental information on QCD vacuum ...
H. Choi, C. Ji
semanticscholar   +1 more source

Decay constants and form factors of s-wave and p-wave mesons in the covariant light-front quark model

, 2011
We reanalyze the decay constants of s-wave and p-wave mesons and D, B ->M form factors, where M represents a pseudoscalar meson, a vector meson, a scalar meson, or an axial vector meson within a covariant light-front quark model.
Abada A, Abe K Belle Collaboration, Amsler C, Asner D Heavy Flavor Averaging Group, Aubert B, Ball P, Bernard C, Bjorken J D, Bjorken J D, Close F E, Feldmann T, Flynn J M, Hwang C W, Nakamura K, R C Verma, Rosner J L Stone S, Suzuki M   +16 more
core   +1 more source

Axial, induced pseudoscalar, and pion-nucleon form factors in manifestly Lorentz-invariant chiral perturbation theory [PDF]

, 2006
We calculate the nucleon form factors G_A and G_P of the isovector axial-vector current and the pion-nucleon form factor G_piN in manifestly Lorentz-invariant baryon chiral perturbation theory up to and including order O(p^4). In addition to the standard
J. Gegelia, K. S. Kuzmin, M. R. Schindler, S. Scherer, S. Scherer, T. Fuchs   +5 more
core   +2 more sources

Conservation challenges and opportunities for native apple (Malus) species in Canada

PLANTS, PEOPLE, PLANET, EarlyView.
Apple, one of the world's most widely cultivated and economically important fruit crops, has two wild relatives native to Canada. In this review, we describe the importance of these native apple species to Indigenous heritage and the current threats the species faces due to pests, diseases, and habitat loss.
Terrell T. Roulston, Chelsey Geralda Armstrong, Mckenna Batstone, Kyle Bobiwash, Sylvia Grace Borda, Dionne Bunsha, Claudia Ciotir, Brian C. Husband, Paul Manning, Tara L. Moreau, Amritpal S. Singh, Tyler W. Smith, Jens Ulrich, Zoë Migicovsky   +13 more
wiley   +1 more source

Dilepton production in proton-proton reaction at 4.5 GeV with the HADES spectrometer [PDF]

EPJ Web of Conferences
Spectra of dileptons emitted in hadron collisions are important tool to study electromagnetic decays of resonances and the validity of the Vector Meson Dominance model.
Abou Yassine Rayane
doaj   +1 more source

Vector meson production at low x from gauge/gravity duality [PDF]

, 2013
A bstractWe use gauge/gravity duality to study vector meson (J/Ψ, ρ0, Ω, Φ) production in electron-proton scattering, in the limit of high center of mass energy at fixed momentum transfer, corresponding to the limit of low Bjorken x, where the process is
M. Costa, M. Djurić, N. Evans
semanticscholar   +1 more source

A Linear Sigma Model with Three Flavors and Vector and Axial-Vector Mesons

, 2010
We outline the extension of the globally chirally invariant Nf = 2 linear sigma model with vector and axial-vector degrees of freedom to Nf=3. We present preliminary results concerning the scalar meson masses.Comment: Prepared for the Proceedings of the ...
Giacosa, Francesco, Kovacs, Peter, Parganlija, Denis, Rischke, Dirk H., Wolf, Gyorgy   +4 more
core   +1 more source

Scaling from microsite to landscape to resolve litter decomposition dynamics in globally extensive drylands

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Decomposition is the transformation of dead organic matter into its inorganic constituents. In most biomes, decomposition rates can be accurately predicted with simple mathematical models, but these models have long under‐predicted decomposition in globally extensive ...
Heather L. Throop, Jiwei Li, Daryl L. Moorhead, Sasha C. Reed, Katherine E. O. Todd‐Brown, Alexi C. Besser, Dellena Evelyn Bloom, Thomas C. Ingalls, Alejandro Cueva   +8 more
wiley   +1 more source

Axial anomaly and vector meson dominance model [PDF]

, 2013
A connection between the axial anomaly and the vector meson dominance model is revealed for the processes of pseudoscalar meson-photon transitions. The analytic continuation of the anomaly sum rules, which are exact QCD relations following follow from ...
Y. Klopot, A. Oganesian, O. Teryaev
semanticscholar   +1 more source

Information on the structure of the rho meson from the pion form-factor

, 2009
The electromagnetic pion form-factor is calculated in a Bethe-Salpeter approach which accounts for pion rescattering. In the scattering kernel the pion-pion contact interaction from lowest-order chiral perturbation theory is considered together with an ...
F. Klingl, S. Leupold
core   +1 more source