Measurement of the Coherent Dissociation Reaction <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>p</mi><mo>+</mo><mi>A</mi><mo>→</mo><mi>p</mi><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow><mo>+</mo><mi>A</mi></math></span>

R. M. Edelstein; E. J. Makuchowski; C. M. Meltzer; E. L. Miller; J. S. Russ; B. Gobbi; J. L. Rosen; H. A. Scott; S. L. Shapiro; L. Strawczynski

doi:10.1103/PhysRevLett.38.185

Measurement of the Coherent Dissociation Reaction $p + A \to p π^{+} π^{-} + A$

R. M. Edelstein, E. J. Makuchowski, C. M. Meltzer, E. L. Miller, J. S. Russ, B. Gobbi, J. L. Rosen, H. A. Scott, S. L. Shapiro, and L. Strawczynski

Phys. Rev. Lett. 38, 185 – Published 31 January 1977

Abstract

The coherent reaction $p + A \to p π^{+} π^{-} + A$ was measured at 22.5 and 15.3 GeV in order to study diffraction dissociation free from normal Regge exchange background. Glauber-model analysis yields a $pN \to N^{*} N$ signal in good agreement with $pp$ scattering. Through the model it is found that $σ_{T} (N^{*} N)$ decreases rapidly from 36±3 mb for $M (N^{*}) = 1.4$ GeV to 18±4 mb for $M >~ 1.7$ GeV and that $α (N^{*} N) \sim - 0.5$ for $M < 1.7$ GeV.

Received 12 July 1976

DOI:https://doi.org/10.1103/PhysRevLett.38.185

Authors & Affiliations

R. M. Edelstein, E. J. Makuchowski, C. M. Meltzer^*, E. L. Miller^†, and J. S. Russ

Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213

B. Gobbi, J. L. Rosen, and H. A. Scott^‡

Northwestern University, Evanston, Illinois 60201

S. L. Shapiro^§ and L. Strawczynski

Rochester University, Rochester, New York 14627

^*Present address: ELSCINT, Inc., P. O. Box 297, Palisades Park, N. J. 07650.
^†Present address: General Automation, Inc., 1055 South East Street, Anaheim, Calif. 92805.
^‡Present address: Cornell University, Ithaca, N. Y. 14850.
^§Present address: Stanford Linear Accelerator Center, Stanford University, Stanford, Calif. 94305.