Measurement of the Ratio <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mfrac><mrow><mi>σ</mi><mo>(</mo><mrow><mmultiscripts><mrow><mi mathvariant="normal">C</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>12</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow><mo>(</mo><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow><mo>,</mo><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow><mi>p</mi><mo>)</mo><mrow><mmultiscripts><mrow><mi mathvariant="normal">B</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>11</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow><mo>)</mo></mrow><mrow><mi>σ</mi><mo>(</mo><mrow><mmultiscripts><mrow><mi mathvariant="normal">C</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>12</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow><mo>(</mo><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow><mo>,</mo><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow><mi>p</mi><mo>)</mo><mrow><mmultiscripts><mrow><mi mathvariant="normal">B</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>11</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow><mo>)</mo></mrow></mfrac></math></span>

H. J. Ziock; R. J. Ellis; K. O. H. Ziock; J. Bolger; E. Boschitz; J. Arvieux; R. Corfu; J. Piffaretti

doi:10.1103/PhysRevLett.43.1919

Measurement of the Ratio $\frac{σ ({}^{12}C (π^{+}, π^{+} p) {}^{11}B)}{σ ({}^{12}C (π^{-}, π^{-} p) {}^{11}B)}$

H. J. Ziock, R. J. Ellis, K. O. H. Ziock, J. Bolger, E. Boschitz, J. Arvieux, R. Corfu, and J. Piffaretti

Phys. Rev. Lett. 43, 1919 – Published 24 December 1979

Abstract

The cross section of the pion-induced proton-knockout reaction ${}^{12}C$ → ${}^{11}B$ has been measured with positive and negative pions. The ratio of the cross sections is compared with the ratio calculated in the plane-wave impulse approximation and agreement is found for those events that lead to particle-stable final states.