310 citations · 4.4k across the 121 of their papers we have counts for
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The Covariant Approach for the Radiative Decay of the J/Ψ Meson and Relation to Amplitudes Extracted in the Helicity Basis
A. V. Anisovich, K. V. Nikonov, A. V. Sarantsev
We have developed the covariant approach for the partial wave analysis of the radiative decay of the vector meson into two pseudoscalar mesons based on the orbital momentum- intrin…
Vertex operators for production of baryon resonances in nucleon-gamma collisions with preserving gauge invariance and analyticity
A. V. Anisovich, V. V. Anisovich, A. V. Sarantsev
Vertex operators for photo- and electro-production of baryon states with arbitrary spin-parity, , are constructed. The operators obey gauge invariance and analytic…
Propagators of resonances and rescatterings of the decay products
A. V. Anisovich, V. V. Anisovich, M. A. Matveev +3
Hadronic resonance propagators which take into account the analytical properties of decay processes are built in terms of the dispersion relation technique. Such propagators can de…
Study of ambiguities in scattering amplitudes
A. V. Anisovich, R. Beck, E. Klempt +4
Amplitudes for the reaction are reconstructed from data on the differential cross section , the recoil polarization , and on the spin rotation parameter $β…
Properties of baryon resonances from a multichannel partial wave analysis
A. V. Anisovich, R. Beck, E. Klempt +3
Properties of nucleon and resonances are derived from a multichannel partial wave analysis. The statistical significance of pion and photo-induced inelastic reactions off proto…
Search for Narrow Nucleon Resonance in
A. V. Anisovich, E. Klempt, V. Kuznetsov +4
Results of a partial wave analysis of new high-statistics data on from MAMI are presented. A fit using known broad resonances and only standard background amplitudes can…
Nucleon resonances in the fourth resonance region
A. V. Anisovich, E. Klempt, V. A. Nikonov +2
Nucleon and resonances in the fourth resonance region are studied in a multichannel partial-wave analysis which includes nearly all available data on pion- and photo-induced re…
Sigma-Meson and Confinement Singularity
A. V. Anisovich, V. V. Anisovich, M. A. Matveev +5
We describe the meson-meson data for the () wave at MeV in two approaches: (i) the K-matrix approach and (ii) the dispersion relation D-m…
P-wave excited baryons from pion- and photo-induced hyperon production
A. V. Anisovich, E. Klempt, V. A. Nikonov +2
We report evidence for , , , , , and , and find indications that might hav…
Quark-diquark Systematics of Baryons: Spectral Integral Equations for Systems Composed by Light Quarks
A. V. Anisovich, V. V. Anisovich, M. A. Matveev +3
For baryons composed by the light quarks () we write spectral integral equation using the notion of two diquarks: (i) axial--vector state, , with the spin …
Quark--Diquark Systematics of Baryons and the SU(6)SYMMETRY for Light States
A. V. Anisovich, V. V. Anisovich, M. A. Matveev +3
We continue our attempts to systematize baryons, which are composed of light quarks (), as quark--diquark systems. The notion of two diquarks is used: (i) , with…
Searching for the quark--diquark systematics of baryons composed by light quarks
A. V. Anisovich, V. V. Anisovich, M. A. Matveev +3
Supposing quark--diquark structure of baryons, we look for systematics of baryons composed of light quarks (). We systematize baryons using the notion of two diquarks: (i) a…
Photoproduction of pions and properties of baryon resonances from a Bonn-Gatchina partial wave analysis
A. V. Anisovich, E. Klempt, V. A. Nikonov +3
Masses, widths and photocouplings of baryon resonances are determined in a coupled-channel partial wave analysis of a large variety of data. The Bonn-Gatchina partial wave formalis…
Two-pion decays of mesons and confinement singularities
A. V. Anisovich, V. V. Anisovich, M. A. Matveev +3
We consider the two-pion decay of the -meson, the -state of the constituent quarks -- the decay being determined by the transition contains informa…
The rho -> gamma pi and omega -> gamma pi decays in quark-model approach and estimation of coupling for pion emission by quark
A. V. Anisovich, V. V. Anisovich, L. G. Dakhno +3
In the framework of the relativistic and gauge invariant spectral integral technique, we calculate radiative decays rho(770)-> gamma pi(140) and omega(780)-> gamma pi(140) supposin…
Photoproduction of mesons off neutrons from a deuteron target
A. V. Anisovich, I. Jaegle, E. Klempt +4
A formalism is developed for the partial wave analysis of data on meson photoproduction off deuterons and applied to photoproduction of and mesons. Different interpretati…
Further evidence for N(1900)P_{13} from photoproduction of hyperons
V. A. Nikonov, A. V. Anisovich, E. Klempt +2
We report further evidence for from an analysis of a large variety of photo- and pion-induced reactions, in particular from the new CLAS measurements of double pola…
Baryon resonances and polarization transfer in hyperon photoproduction
A. V. Anisovich, V. Kleber, E. Klempt +3
A partial wave analysis is presented of data on photoproduction of hyperons including single and double polarization observables. The large spin transfer probability reported by th…
Baryon-baryon and baryon-antibaryon interaction amplitudes in the spin--momentum operator expansion method
A. V. Anisovich, V. V. Anisovich, E. Klempt +2
Partial wave scattering amplitudes in baryon-baryon and baryon-antibaryon collisions and amplitudes for the production and decay of baryon resonances are constructed in the framewo…
Partial decay widths of baryons in the spin-momentum operator expansion method
A. V. Anisovich, A. V. Sarantsev
The cross sections for photo- and pion-induced production of baryon resonances and their partial decay widths to the two--body and multi--body final states are calculated in the fr…
Radiative decays of quarkonium states, momentum operator expansion and nilpotent operators
A. V. Anisovich, V. V. Anisovich, V. N. Markov +3
We present the method of calculation of radiative decays of composite quark-antiquark systems with different J^{PC}: (Q\bar Q)_{in} -> gamma (Q\bar Q)_{out}. The method is relativi…
The Riddle of the f0(980) and a0(980): Are They the Quark-Antiquark States?
A. V. Anisovich, V. V. Anisovich, L. G. Dakhno +4
A list of arguments favouring quark-antiquark nature of a0(980) and f0(980) is presented.
Determination of quark-antiquark component of the photon wave function for u, d, s quarks
A. V. Anisovich, V. V. Anisovich, L. G. Dakhno +2
Based on the data for the transitions pi0, eta, eta' -> gamma gamma^*(Q^2) and reactions of the e^+ e^- -annihilations, e^+ e^- -> rho0, omega, phi and e^+ e^--> hadrons at 1<E_{e^…
Observation of the Second Tensor Nonet with the L3 Experiment
V. A. Schegelsky, A. V. Sarantsev, V. A. Nikonov +2
This paper was withdrawn by arXiv administrators upon request of the Chairperson and Spokesperson of the L3 Collaboration.