Coherent electroproduction of pions from {sup 3}He

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.54.32· OSTI ID:286047

Loucks, R J; Pandharipande, V R ^[1]

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1. Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801 (United States)

The {sup 3}He({ital e},{ital e}{sup {prime}}{pi}{sup +}){sup 3}H reaction is the simplest of the coherent charged pion electroproduction reactions in nuclear physics. It is sensitive to the structure of the trinucleons, and can be studied with the high duty factor electron accelerators now available. It may also provide some insight for understanding the basic {ital p}({ital e},{ital e}{sup {prime}}{pi}{sup +}){ital n} reaction if the latter can be described within the constituent quark models of nucleons. In this work, we calculate the ratio of {ital p}({ital e},{ital e}{sup {prime}}{pi}{sup +}){ital n} and {sup 3}He({ital e},{ital e}{sup {prime}}{pi}{sup +}){sup 3}H cross sections for two kinematical conditions with invariant photon-nucleon mass {ital W}=1160 and 1230 MeV, respectively. The four important contributions to this ratio are identified as (i) the finite size (i.e., the form factor) of the trinucleons, (ii) the spin-isospin correlations in the trinucleons, (iii) the finite range of the propagation of the struck proton, and (iv) the possible pion-nucleon final state interactions. Together they reduce the ratio of the cross section to {approximately}0.4 in this kinematic range. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 286047
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 1 Vol. 54; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COHERENT ACCELERATORS
CORRELATIONS
CROSS SECTIONS
ELECTRON REACTIONS
ELECTRONS
ELECTROPRODUCTION
FINAL-STATE INTERACTIONS
HELIUM 3
HELIUM 3 TARGET
ISOSPIN
PIONS PLUS
SPIN