Study of the Reaction <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow><mi>p</mi><mo>→</mo><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><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><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow><mi>p</mi></math></span> at 3.9 <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mfrac><mrow><mi mathvariant="normal">GeV</mi></mrow><mrow><mi>c</mi></mrow></mfrac></math></span>

K. Abe; A. D. Johnson; V. J. Stenger; P. G. Wohlmut

doi:10.1103/PhysRevD.2.91

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Study of the Reaction $π^{-} p \to π^{-} π^{-} π^{-} π^{+} π^{+} p$ at 3.9 $\frac{GeV}{c}$

K. Abe^*, A. D. Johnson, V. J. Stenger, and P. G. Wohlmut

University of Hawaii, Honolulu, Hawaii

^*Present address: Department of Physics, Tohoku University, Japan.

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Phys. Rev. D 2, 91 – Published 1 July, 1970

DOI: https://doi.org/10.1103/PhysRevD.2.91

Abstract

We have obtained 459 events of the type $π^{-} p \to π^{-} π^{-} π^{-} π^{+} π^{+} p$ at 3.9 $\frac{GeV}{c}$ . The cross section is found to be 0.115±0.011 mb. Strong $Δ^{+ +} (1236)$ production is observed, along with the production of $ρ^{0}$ in association with the $Δ^{+ +} (1236)$ . A statistically significant ${A_{1}}^{-}$ signal is present. An anomalous enhancement is observed at 1.4-GeV $π^{+} π^{+} p$ mass which is mainly caused by the strong $Δ^{+ +} (1236)$ production. No meaningful structure is seen in any of the four- or five-body invariant-mass spectra. The data have been fitted with a model of incoherent resonance production.

References (13)

H. Drevermann, U. Idschok, G. Winter, K. Böckmann, A. J. Apostolakis, G. Briggs, C. A. Kitchen, J. V. Major, C. L. Pols, J. Schotanus, D. Toet, R. T. Van de Walle, R. Lestienne, P. Fleury, C. Grosso, B. Quassiati, G. Rinaudo, and A. Werbrouck, Phys. Rev. 161, 1356 (1967)
F. Bomse, S. Borenstein, E. B. Brucker, A. Callahan, J. Cole, D. Ellis, D. Gillespie, G. Luste, E. Moses, A. Pevsner, and R. Zdanis, Phys. Rev. 162, 1328 (1967)
J. Campbell and M. A. Ijaz, Bull. Am. Phys. Soc. 12, 915 (1967) J. Campbell, A. Naeem, and M. A. Ijaz, ibid. 13, 32 (1968)
R. A. Luke and V. G. Lind, Bull. Am. Phys. Soc. 13, 589 (1968) R. H. Allen and V. G. Lind, ibid. 13, 589 (1968)
P. Daronian, A. Daudin, B. Gandois, C. Kochowski, and L. Mosca, in Topical Conference on High-Energy Collisions of Hadrons, CERN Report No. 68-7, 1968, Vol. II, p. 226 (unpublished)
E. D. Alyea, Jr., R. R. Crittenden, K. F. Galloway, K. Y. Yee, H. J. Martin, and K. F. Suen, Phys. Rev. Letters 21, 1421 (1968)
P. G. Wohlmut, M.S. thesis, University of Hawaii Report No. UH-511-18-68, 1967 (unpublished)
A. D. Johnson, M.S. thesis, University of Hawaii Report No. UH-511-17-68, 1967 (unpublished)
P. G. Wohlmut, University of Hawaii (private communication)
J. Friedman, Alvarez Programming Group Note No. P-156, 1966, Lawrence Radiation Laboratory, University of California, Berkeley (unpublished)
P. G. Wohlmut, K. Abe, A. D. Johnson, and V. J. Stenger, Nucl. Phys. (to be published)
G. Goldhaber, W. B. Fowler, S. Goldhaber, T. F. Huang, T. E. Kalogeropoulos, and W. M. Powell, Phys. Rev. Letters 3, 181 (1959)
G. Goldhaber, S. Goldhaber, W. Lee, and A. Pais, Phys. Rev. 120, 300 (1960)

[c1] H. Drevermann, U. Idschok, G. Winter, K. Böckmann, A. J. Apostolakis, G. Briggs, C. A. Kitchen, J. V. Major, C. L. Pols, J. Schotanus, D. Toet, R. T. Van de Walle, R. Lestienne, P. Fleury, C. Grosso, B. Quassiati, G. Rinaudo, and A. Werbrouck, Phys. Rev. 161, 1356 (1967)

[c2] F. Bomse, S. Borenstein, E. B. Brucker, A. Callahan, J. Cole, D. Ellis, D. Gillespie, G. Luste, E. Moses, A. Pevsner, and R. Zdanis, Phys. Rev. 162, 1328 (1967)

[c3] J. Campbell and M. A. Ijaz, Bull. Am. Phys. Soc. 12, 915 (1967) J. Campbell, A. Naeem, and M. A. Ijaz, ibid. 13, 32 (1968)

[c4] R. A. Luke and V. G. Lind, Bull. Am. Phys. Soc. 13, 589 (1968) R. H. Allen and V. G. Lind, ibid. 13, 589 (1968)

[c5] P. Daronian, A. Daudin, B. Gandois, C. Kochowski, and L. Mosca, in Topical Conference on High-Energy Collisions of Hadrons, CERN Report No. 68-7, 1968, Vol. II, p. 226 (unpublished)

[c6] E. D. Alyea, Jr., R. R. Crittenden, K. F. Galloway, K. Y. Yee, H. J. Martin, and K. F. Suen, Phys. Rev. Letters 21, 1421 (1968)

[c7] P. G. Wohlmut, M.S. thesis, University of Hawaii Report No. UH-511-18-68, 1967 (unpublished)

[c8] A. D. Johnson, M.S. thesis, University of Hawaii Report No. UH-511-17-68, 1967 (unpublished)

[c9] P. G. Wohlmut, University of Hawaii (private communication)

[c10] J. Friedman, Alvarez Programming Group Note No. P-156, 1966, Lawrence Radiation Laboratory, University of California, Berkeley (unpublished)

[c11] P. G. Wohlmut, K. Abe, A. D. Johnson, and V. J. Stenger, Nucl. Phys. (to be published)

[c12] G. Goldhaber, W. B. Fowler, S. Goldhaber, T. F. Huang, T. E. Kalogeropoulos, and W. M. Powell, Phys. Rev. Letters 3, 181 (1959)

[c13] G. Goldhaber, S. Goldhaber, W. Lee, and A. Pais, Phys. Rev. 120, 300 (1960)

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Study of the Reaction $π^{-} p \to π^{-} π^{-} π^{-} π^{+} π^{+} p$ at 3.9 $\frac{GeV}{c}$

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Study of the Reaction π−p→π−π−π−π+π+p at 3.9 GeVc

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Study of the Reaction $π^{-} p \to π^{-} π^{-} π^{-} π^{+} π^{+} p$ at 3.9 $\frac{GeV}{c}$