Comparison of Pion- and Photon-Induced Reactions on <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">C</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>12</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span>

R. D. McKeown; J. P. Schiffer; H. E. Jackson; M. Paul; S. J. Sanders; J. R. Specht; E. J. Stephenson; R. P. Redwine; R. E. Segel; J. Arends; J. Eyink; H. Hartmann; A. Hegerath; B. Mecking; G. Nöldeke; H. Rost

doi:10.1103/PhysRevLett.45.2015

Comparison of Pion- and Photon-Induced Reactions on ${}^{12}C$

R. D. McKeown, J. P. Schiffer, H. E. Jackson, M. Paul, S. J. Sanders, J. R. Specht, E. J. Stephenson, R. P. Redwine, R. E. Segel, J. Arends, J. Eyink, H. Hartmann, A. Hegerath, B. Mecking, G. Nöldeke, and H. Rost

Phys. Rev. Lett. 45, 2015 – Published 22 December 1980

Abstract

The proton spectra from pion- and photon-induced reactions on ${}^{12}C$ at the $Δ (\frac{3}{2}, \frac{3}{2})$ resonance are found to be very similar in shape, and in their variation with angle. It seems reasonable to assume that these protons arise from a common reaction mechanism ( $Δ$ production) for the two projectiles. The absolute cross sections for producing protons with pions and with photons are in roughly the same ratio as the total inelastic pion yield to the total photopion yield.

Received 8 September 1980

DOI:https://doi.org/10.1103/PhysRevLett.45.2015

Authors & Affiliations

R. D. McKeown, J. P. Schiffer, H. E. Jackson, M. Paul^*, S. J. Sanders, J. R. Specht, and E. J. Stephenson^†

Argonne National Laboratory, Argonne, Illinois 60439

R. P. Redwine

Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

R. E. Segel

Northwestern University, Evanston, Illinois 60201

J. Arends, J. Eyink, H. Hartmann, A. Hegerath, B. Mecking, G. Nöldeke, and H. Rost

Physikalisches Institut, Universität Bonn, D-5300 Bonn, West Germany

^*Present address: Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem, Israel.
^†Present address: Indiana University Cyclotron Facility, Bloomington, Ind. 47401.