Results 61 to 70 of about 8,701 (188)
Exclusive high-$Q^2$ electroproduction: light-cone wave functions and electromagnetic form factors of mesons, [PDF]
, 1995 We apply the light-cone technique to electroproduction reaction $ep\to e\pi^+n$ long considered as a means of measuring the electromagnetic form factor of the pion.
Anisovich +39 more
core +2 more sources
Electroproduction of pion pairs
, 2006 We study hard exclusive electroproduction of two pions in the QCD factorization approach at next-to-leading order (NLO) in the strong coupling. The pion pair can be produced both in an isovector and in an isoscalar state. The angular distribution of the produced pion pairs allows one to project out a component that depends on the interference of the ...
Ivanov, D. Yu. +3 more
openaire +3 more sources
Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018 The QCD light‐front Hamiltonian equation HLF|Ψ〉 = M2|Ψ〉 derived from quantization at fixed LF time τ = t + z/c provides a causal, frame‐independent method for computing hadron spectroscopy as well as dynamical observables such as structure functions, transverse momentum distributions, and distribution amplitudes. The QCD Lagrangian with zero quark mass
Stanley J. Brodsky, Ralf Hofmann
wiley +1 more source
Role of Resonances in the Electromagnetic Production of Kaon Near Threshold
EPJ Web of Conferences, 2012 Kaon photo- and electroproduction processes near their production thresholds are investigated by using an effective Lagrangian method. It is found that the nucleon and hyperon resonances play a considerably important role in this kinematics.
Mart T.
doaj +1 more source
The light baryon resonance spectrum in a coupled-channel approach – Recent results of the Jülich-Bonn model [PDF]
EPJ Web of ConferencesWe present recent results from the Jülich-Bonn dynamical coupledchannel approach, where the spectrum of nucleon and Delta resonances is extracted based on a combined study of the pion- and photon-induced production of πN, ηN, KΛ and KΣ final states.
Rönchen Deborah
doaj +1 more source
Sivers Effect in Dihadron Electroproduction
EPJ Web of Conferences, 2015 The Sivers effect in polarized SIDIS can be measured in two hadron production as sine modulations involving the azimuthal angles ϕT and ϕR of both the total and the relative transverse momenta of the hadron pair, complementary to the conventional single ...
Kotzinian Aram +2 more
doaj +1 more source
Unintegrated gluon distribution from forward polarized $$\rho $$ ρ -electroproduction
European Physical Journal C: Particles and Fields, 2018 We present here some arguments to support our suggestion that data on the helicity structure for the hard exclusive electroproduction of $$\rho $$ ρ mesons at HERA (and in possible future high-energy electron-proton colliders) provide useful information ...
Andrèe Dafne Bolognino +3 more
doaj +1 more source
Nucleon-to-pion transition distribution amplitudes and backward electroproduction of pions [PDF]
, 2012 Baryon to meson transition distribution amplitudes (TDAs), non-diagonal matrix elements of the nonlocal three quark operator between a nucleon and a meson state, extend the concept of generalized parton distributions. These non-perturbative objects which
Pire, B. +2 more
core +1 more source
, 2011 By extending our previous isobar model to the K^0Lambda isospin channel we investigate the properties of the K^0Lambda photo- and electroproduction at energies near threshold.
Mart, T.
core +1 more source
Invariant amplitudes for pion electroproduction [PDF]
The European Physical Journal A, 2007 The invariant amplitudes for pion electroproduction on the nucleon are evaluated by dispersion relations at constant t with MAID as input for the imaginary parts of these amplitudes. In the threshold region these amplitudes are confronted with the predictions of several low-energy theorems derived in the soft-pion limit.
PASQUINI, BARBARA +2 more
openaire +3 more sources