Cross Section Measurements of Charged Pion Photoproduction in Hydrogen and Deuterium from 1.1 to 5.5 GeV

Abstract

The differential cross section for the gamma +n --> pi- + p and the gamma + p --> pi+ n processes were measured at Jefferson Lab. The photon energies ranged from 1.1 to 5.5 GeV, corresponding to center-of-mass energies from 1.7 to 3.4 GeV. The pion center-of-mass angles varied from 50 degree to 110 degree. The pi- and pi+ photoproduction data both exhibit a global scaling behavior at high energies and high transverse momenta, consistent with the constituent counting rule prediction and the existing pi+ data. The data suggest possible substructure of the scaling behavior, which might be oscillations around the scaling value. The data show an enhancement in the scaled cross section at center-of-mass energy near 2.2 GeV. The differential cross section ratios at high energies and high transverse momenta can be described by calculations based on one-hard-gluon-exchange diagrams.

18 pages, 19 figures

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Cited by in corpus (36)

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• ${\pi }^0$ photoproduction on the proton for photon energies from 0.675 to 2.875 GeV
• Photocouplings at the Pole from Pion Photoproduction
• Light Baryon Spectroscopy
• Photoproduction Reactions and Non-Strange Baryon Spectroscopy
• Transition between nuclear and quark-gluon descriptions of hadrons and light nuclei
• A measurement of the differential cross section for the reaction $\gamma n\to {\pi }^{-}p$ from deuterium
• Determination of exotic hadron structure by constituent-counting rule for hard exclusive processes
• Amplitude analysis of gamma n --> pi- p data above 1 GeV
• Regge approach to charged-pion photoproduction at invariant energies above 2 GeV
• Rescattering in Meson Photoproduction off Few Body Systems
• Deep exclusive ${\pi }^{+}$ electroproduction off the proton at CLAS
• Dynamical coupled channel calculation of pion and omega meson production
• Constituent-counting rule in photoproduction of hyperon resonances
• Hard Photodisintegration of a Proton Pair
• Unitarity constraints on charged pion photoproduction at large p_perp
• Backward pion photoproduction
• A relativistic framework to determine the nuclear transparency from A(p,2p) reactions
• Separated Response Function Ratios in Exclusive, Forward pi^{+/-} Electroproduction
• The Higgs mass derived from the U(3) Lie group
• Features of $\omega$ photoproduction off nucleon target at forward angles : Dominance of $\pi$ exchange with Regge cuts and scaling of differential cross sections
• Wide-angle photo- and electroproduction of pions to twist-3 accuracy
• Neutron to proton mass difference, parton distribution functions and baryon resonances from dynamics on the Lie group u(3)
• Operator Approach to Isospin Violation in Pion Photoproduction
• Separated Response Functions in Exclusive, Forward ${\pi }^{\pm }$ Electroproduction on Deuterium
• Determination of the Beam-Spin Asymmetry of Deuteron Photodisintegration in the Energy Region $E_{\gamma }=1.1-2.3$ GeV
• Production potential of hidden-strange molecular pentaquarks through the ${\pi }^{-}p\to K^{\ast }\Sigma$ process
• Role of $\omega$-meson exchange in scaling of the $\gamma p\to {\pi }^{0}p$ process from a Regge-type model with resonances
• The Constituent Counting Rule and Omega Photoproduction
• Transparency of the $\gamma (n,p){\pi }^{-}$ reaction in nuclei
• Producing $\Lambda (1405)$ and $\Lambda (1520)$ in ${\pi }^{-}p$ reaction to explore their inner structures
• Exotic-Hadron Signature by Constituent-Counting Rule in Perturbative QCD
• Internal structure of exotic hadrons by high-energy exclusive reactions