Photoproduction of Neutral Pions off Protons

Abstract

Photoproduction of neutral pions has been studied with the CBELSA/TAPS detector in the reaction $\gamma p\to p{\pi }^0$ for photon energies between 0.85 and 2.50 GeV. The ${\pi }^0$ mesons are observed in their dominant neutral decay mode: ${\pi }^0\to \gamma \gamma$. For the first time, the differential cross sections cover the very forward region, ${\theta }_{c.m.}<60^{\circ }$. A partial-wave analysis of these data within the Bonn-Gatchina framework observes the high-mass resonances $G_{17}$(2190), $D_{13}$(2080), and $D_{15}$(2070).

arXiv comment12 pages, 9 figures, minor modifications to PWA section

References in corpus (19)

• Baryon spectroscopy
• Differential cross section and recoil polarization measurements for the gamma p to K+ Lambda reaction using CLAS at Jefferson Lab
• Photoproduction of $\eta$ and $\eta \prime$ Mesons off Protons
• Partial wave decomposition of pion and photoproduction amplitudes
• ${\pi }^{+}$ photoproduction on the proton for photon energies from 0.725 to 2.875 GeV
• Photoproduction of Baryons Decaying into N pi and N eta
• ${\pi }^0$ photoproduction on the proton for photon energies from 0.675 to 2.875 GeV
• Neutral pion photoproduction off protons in the energy range 0.3 GeV < E(gamma) < 3 GeV
• Test of low-energy theorems for p(\vec{gamma},π^{0})p in the threshold region
• Partial decay widths of baryons in the spin-momentum operator expansion method
• The helicity amplitudes A${}_{1/2}$ and A${}_{3/2}$ for the D${}_{13}(1520)$ resonance obtained from the $\vec{\gamma }\vec{p}\to p{\pi }^0$ reaction}
• Nucleon resonance decay by the $K^0{\Sigma }^{+}$ channel
• Photoproduction of pi0-mesons off protons from the Delta(1232) region to E(gamma) = 3 GeV
• K^0 pi^0 Sigma^+ and K^*0 Sigma^+ photoproduction off the proton
• Partial wave analysis of the reaction gamma p -> p omega$ and the search for nucleon resonances
• P-wave excited baryons from pion- and photo-induced hyperon production
• Moment-operator expansion for the two-meson, two-photon and fermion-antifermion states
• Measurement of the Beam Asymmetry $\Sigma$ in the Forward Direction for pi0 Photoproduction
• Backward-angle photoproduction of ${\pi }^0$ mesons on the proton at $E_{\gamma }$ = 1.5--2.4 GeV

Cited by in corpus (16)

• QCD and strongly coupled gauge theories: challenges and perspectives
• Properties of baryon resonances from a multichannel partial wave analysis
• Progress Toward Understanding Baryon Resonances
• High statistics study of the reaction $\gamma p\to p{\pi }^0\eta$
• Photocouplings at the Pole from Pion Photoproduction
• Well-established nucleon resonances revisited by double-polarization measurements
• Light Baryon Spectroscopy
• Measurement of pi^0 photoproduction on the proton at MAMI C
• Updated SAID analysis of pion photoproduction data
• Photoproduction of ω Mesons off the Proton
• Photoproduction of pi0-mesons off neutrons in the nucleon resonance region
• First measurement of the polarization observable $E$ and helicity-dependent cross sections in single ${\pi }^0$ photoproduction from quasi-free nucleons
• Coupled-channel analysis of pion- and eta-electroproduction with the Jülich-Bonn-Washington model
• Neutral pion photoproduction on the nucleon in a chiral quark model
• Photoproduction of {\boldmath{${\pi }^0$}} Mesons off Protons and Neutrons in the Second and Third Nucleon Resonance Region
• Single-energy partial wave analysis for pion photoproduction with fixed-t analyticity