Determining pseudoscalar meson photoproduction amplitudes from complete experiments

  title={Determining pseudoscalar meson photoproduction amplitudes from complete experiments},
  author={Andrew M. Sandorfi and Samuel D. Hoblit and Hiroyuki Kamano and T.-S.H. Lee},
  journal={Journal of Physics G},
A new generation of complete experiments is focused on a high precision extraction of pseudoscalar meson photoproduction amplitudes. Here, we review the development of the most general analytic form of the cross section, dependent upon the three polarization vectors of the beam, target and recoil baryon, including all single-, double- and triple-polarization terms involving 16 spin-dependent observables. We examine the different conventions that have been used by different authors, and we… 

On the spin-observables in pseudoscalar meson photoproduction

  • K. Nakayama
  • Physics
    Journal of Physics G: Nuclear and Particle Physics
  • 2019
Spin-observables in pseudoscalar meson photoproduction is discussed. This work is complementary to the earlier works on this topic. Here, the reaction amplitude is expressed in Pauli-spin basis which

Explicit derivation of the completeness condition in pseudoscalar meson photoproduction

By exploiting the underlying symmetries of the relative phases of the pseudoscalar meson photoproduction amplitude, we determine all the possible sets of four double-spin observables that resolve the

Determining dominant partial waves in photoproduction via moment analysis

Important insights into the excitation spectra of baryons are provided by measurements of polarization observables in reactions that involve particles with spin. The photoproduction of a single

The complete experiment problem of pseudoscalar meson photoproduction in a truncated partial wave analysis

One of the remaining open challenges in Standard Model phenomenology is the formation of bound states of quarks in the strong coupling regime of Quantum Chromodynamics (QCD). This is true in

Determination of Polarization Transfer Coefficients and Hyperon Induced Polarization for Quasi–Free Hyperon Photoproduction off the Bound Neutron

The spectrum of the excited nucleon (N∗) states provides key information on the relevant degrees of freedom within the nucleon. The determination of the N∗ spectrum requires an extensive set of

Determining the dominant partial wave contributions from angular distributions of single- and double-polarization observables in pseudoscalar meson photoproduction

Abstract.This work presents a simple method to determine the significant partial wave contributions to experimentally determined observables in pseudoscalar meson photoproduction. First, fits to

Photo- and Electrocouplings of Nucleon Resonances

Advances in the exploration of the spectrum and structure of the excited states of the nucleon from experiments with electromagnetic probes on proton targets are presented. Impressive progress has

Unravelling the Excitation Spectrum of the Nucleon

The low-energy structure of QCD lies encoded in the excited states of the nucleon, a complicated overlap of many resonances. Recent Lattice calculations have confirmed the longstanding quark model



Completeness rules for spin observables in pseudoscalar meson photoproduction

The number and type of measurements needed to ascertain the amplitudes for pseudoscalar meson photoproduction are analyzed in this paper. It is found that eight carefully selected measurements can

Threshold pion photoproduction on nucleons

Pion photo- and electroproduction of the nucleon at threshold is reviewed in theory and experiment. In this region the leading S-wave amplitudes (E0+) are predicted by low-energy theorems (LET) based

Photo- and electroproduction of eta mesons

Eta photo- and electroproduction off the nucleon is investigated in an effective lagrangian approach that contains Born terms and both vector meson and nucleon resonance contributions. In particular,

Kaon photoproduction: Data consistency, coupling constants, and polarization observables.

A thorough analysis of the existing differential cross section data up to 1.4 GeV shows the Orsay data to be internally inconsistent, and a rather simple reaction mechanism with the extracted main kaon-hyperon-nucleon coupling constants in agreement with the SU(3) predictions is proposed.

Spin observables at threshold for meson photoproduction.

The expected nodal structure of all sixteen observables near threshold, their evolution with momentum, the role of the centrifugal barrier on threshold multipole amplitudes, and the roles of resonance effects on spin observables are discussed.

Review of Particle Physics

  • K. Olive
  • Physics, Environmental Science
    Physical review. D, Particles and fields
  • 1996
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,283 new measurements from 899 papers, we list, evaluate, and average measured properties of

Differential cross section and recoil polarization measurements for the γp→K+Λ reaction using CLAS at Jefferson Lab

We present measurements of the differential cross section and Lambda recoil polarization for the gamma p to K+ Lambda reaction made using the CLAS detector at Jefferson Lab. These measurements cover

Principles and problems of phase-shift analysis

Phase-shift analysis is the extraction of the scattering amplitude from the scattering cross section and other experimentally observable quantities such as polarizations. When only elastic scattering