• Aucun résultat trouvé

[PDF] Top 20 Distribution amplitude for the photon-pion transition

Has 10000 "Distribution amplitude for the photon-pion transition" found on our website. Below are the top 20 most common "Distribution amplitude for the photon-pion transition".

Distribution amplitude for the photon-pion transition

Distribution amplitude for the photon-pion transition

... on the value of ξ ...because the sign of ξ defines the shape of the axial ...to the evaluation of the integrals (2.4-2.5). The meson DA, φ M (z) , is chosen to be ... Voir le document complet

7

Pion-photon transition distribution amplitudes in the Nambu-Jona-Lasinio model

Pion-photon transition distribution amplitudes in the Nambu-Jona-Lasinio model

... define the pion-photon transition distribution amplitudes (TDA) in a field theoretic formalism from a covariant Bethe-Salpeter approach for the determination of the ... Voir le document complet

12

Computing transition rates for the 1-D stochastic Ginzburg–Landau–Allen–Cahn equation for finite-amplitude noise with a rare event algorithm

Computing transition rates for the 1-D stochastic Ginzburg–Landau–Allen–Cahn equation for finite-amplitude noise with a rare event algorithm

... analyse the transition rates and duration of reactive trajectories of the stochastic 1-D Allen-Cahn equations for both the Freidlin-Wentzell regime (weak noise or temperature limit) and ... Voir le document complet

32

Chirping a two-photon transition in a multi-state ladder

Chirping a two-photon transition in a multi-state ladder

... address the problem of a manifold of intermediate states. In the case of a multi-state ladder with a harmonic manifold we have the interference of all excitation paths, that is the weighted ... Voir le document complet

12

The Valence Quark Distribution of the Pion

The Valence Quark Distribution of the Pion

... of the forward γ ⋆ π → γ ⋆ π scattering amplitude is evaluated and related to the structure ...that the introduction of non- perturbative effects, linked to the size of the ... Voir le document complet

3

Observation of photon polarization in the $b \to s\gamma$ transition

Observation of photon polarization in the $b \to s\gamma$ transition

... mass distribution of the selected B + → K + π − π + γ signal is modeled with a double-tailed Crystal Ball [18] probability density function (PDF), with power-law tails above and below the B ...mass. ... Voir le document complet

17

Confinement and cut-off: A model for the Pion Quark Distribution Function

Confinement and cut-off: A model for the Pion Quark Distribution Function

... of the pion, in which the qqπ vertex is described by a simple pseudoscalar coupling, and where possible singularities are buried in the mass and cou- pling parameters, so that the ... Voir le document complet

3

Exclusive Neutral Pion Electroproduction in the Deeply Virtual Regime

Exclusive Neutral Pion Electroproduction in the Deeply Virtual Regime

... including the Regge model and the general- ized parton distribution (GPD) ...by the Regge theory, which ex- ploits the analytic properties of the scattering amplitude in ... Voir le document complet

23

A simple model for generalised parton distributions of the pion

A simple model for generalised parton distributions of the pion

... to the off-diagonal case [2,3,4]. For the latter, the off-forward structure functions are related to the off-forward γ ∗ -hadron amplitude and appear as convolutions of ... Voir le document complet

5

Consistent model for \pi N transition distribution amplitudes and backward pion electroproduction

Consistent model for \pi N transition distribution amplitudes and backward pion electroproduction

... present the results of calculation of I(ξ) in our composite model for πN TDAs of ...out, the coefficients T α , T α 0 (33), which can be read from the Table I of ...to the alternative ... Voir le document complet

39

Analytic amplitude models for forward scattering

Analytic amplitude models for forward scattering

... (demanding the use of exact dispersion relations), or add lower trajectories to the existing ...be the subject of a future study. Secondly the inclusion of other data may very well allow one ... Voir le document complet

13

Bootstrap Equations for String-Like Amplitude

Bootstrap Equations for String-Like Amplitude

... even the simplest (tree level) bootstrap system for the physical parameters of 2 → 2 hadron scattering looks very intricate and ...as the non-trivial geometry of Mandelstam complex plane, ... Voir le document complet

7

The Substantial Model Of The Photon

The Substantial Model Of The Photon

... the atomic level and to the experimental data. The purpose of this article is to fill this gap and to provide a more detailed and well-grounded substantial model of the ...on the ... Voir le document complet

57

Bootstrap and the parameters of pion nucleon resonances

Bootstrap and the parameters of pion nucleon resonances

... (in the sense of Weinberg), the assumption that the perturbation theory (loop expansion for the scatter- ing amplitudes) is self consistent, together with the general ... Voir le document complet

6

Analytic pion form factor

Analytic pion form factor

... 2016) The pion electromagnetic form factor and two-pion production in electron-positron collisions are simultaneously fitted by a vector dominance model evolving to perturbative QCD at large momentum ... Voir le document complet

10

The photon wave function

The photon wave function

... consider the latter as the real (or imaginary) part of  and 1  , as it is customary in the 2 harmonic represent n of ssical ...to the wave function (9) merely corresponds to introducing a ... Voir le document complet

12

Pion physics in the Liege intranuclear cascade model

Pion physics in the Liege intranuclear cascade model

... C. Pion average potential We want to introduce the average potential energy felt by a π sitting inside the ...nucleus. The first idea is to turn, as for nucleons, to the ... Voir le document complet

17

One loop amplitude for Heterotic string on T 2

One loop amplitude for Heterotic string on T 2

... that the first two lines match as they should. The polynomials in the 3rd line of ( ...in the volume suppressed part of ( 3.10 ). In both ( 3.16 ) and ( 3.17 ) the first line is ... Voir le document complet

31

Universal distribution of random matrix eigenvalues near the "birth of a cut'' transition.

Universal distribution of random matrix eigenvalues near the "birth of a cut'' transition.

... this transition shows logarithmic and non-analytical ...instead, the power of N changes in a saw teeth ...mathematics. The reason of their success for most of their applications is their ... Voir le document complet

35

Tantalum STJ for Photon Counting Detectors

Tantalum STJ for Photon Counting Detectors

... [6]. The multilayer is deposited in- situ by DC-Magnetron sputtering. The aluminum oxide barrier is obtained by static oxidation (200 mbar of pure oxygen atmosphere during 30 ...since the square ... Voir le document complet

5

Show all 10000 documents...