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Phys. Rev. C 21, 306 - 323 (1980)

Production and knockout of nucleon isobars from helium by 5 GeV pions
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S. Jonsson, S. Dahlgren, T. Ekelöf *, P. Grafström *, E. Hagberg, A. Hallgren, and S. Kullander
Gustaf Werner Institute, University of Uppsala, S-751 21 Uppsala, Sweden

B. Badełek and J. Nassalski
Institute of Experimental Physics and Nuclear Research, University of Warsaw, 00-681 Warsaw, Poland

J. Berthot, P. Cotte, C. Doré, L. Meritet, M. Querrou, and F. Vazeille
Laboratoire de Physique Corpusculaire, IN2P3, University of Clermont-Ferrand, 63170 Aubiere, France

J. P. Burq, M. Chemarin, M. Chevallier, B. Ille, and M. Lambert
Institut de Physique Nucléaire, IN2P3, University of Lyon, 69621 Villeurbanne, France

G. Fäldt *
Institute of Theoretical Physics, University of Stockholm, S-113 46 Stockholm, Sweden

P. C. Gugelot
Physics Department, University of Virginia, Charlottesville, Virginia Charlottesville, Virginia 22901

Received 5 April 1979

Using both recoil and fast-particle spectrometers, the reaction π-+4He→π-+3H+x has been measured for triton momenta in the region 0.24-0.60 GeV/c. The experimental spectra are presented as functions of triton momentum and angle and of mass of the unmeasured object. In the theoretical analysis it is assumed that the final state can be reached via quasielastic scattering from N*3H states and via N* productions from the p3H state of helium. The most credible of three investigated p3H wave functions requires one percent of N*3H states in the mass range 1.08-1.80 GeV/c2.

NUCLEAR REACTIONS 4He(π-,π-x)t, E=5 GeV, Et>10 MeV measured σ(θt,mx), σ(mx,Et), σ(mx,θt); deduced p-t wave-f, x-t prob. 1.1<mx<1.8 GeV. p(π-,π-)x, E=5 GeV, measured σ(mx).


©1980 The American Physical Society

URL: http://link.aps.org/abstract/PRC/v21/p306
DOI: 10.1103/PhysRevC.21.306

* Present address: CERN, 1211 Geneva 23, Switzerland.

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