Results 101 to 110 of about 280,926 (312)

Meson-meson interactions in a nonperturbative chiral approach [PDF]

open access: yesPhysical Review D, 1999
27 pages, 12 figures.
Oller, JA   +2 more
openaire   +6 more sources

Grass functional traits reflect the long history of fire and grazers in the savannas of Texas

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Understanding relationships among grass traits, fire, and herbivores may help improve conservation strategies for savannas that are threatened by novel disturbance regimes. Emerging theory, developed in Africa, emphasizes that functional traits of savanna grasses reflect the distinct ways that fire and grazers consume biomass ...
Ashish N. Nerlekar   +2 more
wiley   +1 more source

In-medium Properties of the η′-Meson from Photonuclear Reactions

open access: yesEPJ Web of Conferences, 2012
Investigations of in-medium properties of the η′-meson are presented. The photoproduction of η′-mesons off 12C, 40Ca, 93Nb and 208Pb nuclei has been measured with the Crystal Barrel/TAPS detector system at the ELSA accelerator in Bonn.
Nanova Mariana
doaj   +1 more source

Convergence of the barycentre of measures from Fuchsian action groups [PDF]

open access: yes, 2013
We prove the pointwise ergodic convergence of the sequence of barycentres of empirical measures which are defined from the action of Fuchsian groups and by maps valuated in CAT(0)−spaces.
Meson, Alejandro Mario   +1 more
core   +2 more sources

S-wave Meson-Nucleon Interactions and the Meson Mass in Nuclear Matter from Chiral Effective Lagrangians

open access: yes, 1995
Chiral effective lagrangians may differ in their prediction of meson-nucleon scattering amplitudes off-meson-mass-shell, but must yield identical S-matrix elements.
Thorsson, Vesteinn, Wirzba, Andreas
core   +2 more sources

Measurement of the fragmentation fraction ratio fs/fd and its dependence on B meson kinematics [PDF]

open access: yes, 2013
A bstractThe relative production rate of $ B_s^0 $ and B0 mesons is determined with the hadronic decays $ B_s^0\to D_s^{-}{\pi^{+}} $ and B0 → D−K+.
R. Aaij   +499 more
semanticscholar   +1 more source

Exclusive vector meson production at high energies and gluon saturation [PDF]

open access: yesSymposium on Designing Interactive Systems, 2014
We systematically study exclusive diffractive (photo) production of vector mesons ($J/\psi$, $\psi(2s)$, $\phi$ and $\rho$) off protons in high-energy collisions and investigate whether the production is a sensitive probe of gluon saturation. We confront
N. Armesto, A. Rezaeian
semanticscholar   +1 more source

Theoretical study of the γγ→meson-meson reaction [PDF]

open access: yesAIP Conference Proceedings, 1998
We present a unified picture which studies simultaneously the gamma gamma-->pi^+ pi^-, pi^0 pi^0, K^+ K^-, K^0 bar{K}^0, pi^0 eta reactions up to about sqrt(s)=1.4 GeV reproducing the experimental cross sections. The present work implements in an accurate way the final state interactions of the meson-meson system, which is shown to be essential in ...
Oller Berber, José Antonio   +1 more
openaire   +7 more sources

Phylogenomics, historical biogeography, and diversification of leaf traits in the Malagasy‐endemic genus Uncarina (Pedaliaceae)

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Uncarina contains 14 species of woody plants endemic to Madagascar. Its occurrence across dryland biomes on the island make it an interesting system to study the diversification of the flora. Methods Using samples of all species and 512 nuclear loci, we reconstructed phylogenetic trees to examine species relationships and assess their ...
Jeffrey P. Rose   +3 more
wiley   +1 more source

$\eta \to \pi^0 \gamma \gamma$ decay within unitarized chiral perturbation theory [PDF]

open access: yes, 2002
We improve the calculations of the $\eta \to \pi^0 \gamma \gamma$ decay within the context of meson chiral lagrangians. We use a chiral unitary approach for the meson-meson interaction, thus generating the $a_0(980)$ resonance and fixing the longstanding
A. A. Bel’kov   +48 more
core   +3 more sources

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