@article{f85b267592ea4dadb189618a8128c329,
title = "Cross channel isospin amplitudes for 3.9 GeV/c π+-p → π(Nπ) compared with the predictions of a double exchange model",
abstract = "A cross-channel isospin analysis has been carried out on a prism plot separated sample of 3.9 GeV/c π+-p → π(Nπ) events. An enhancement is observed in the low (Nπ) invariant mass region for an I = 1 2 state of the Nπ system when the isospin for the cross channel is both IE = 0 and 1. These results and those of similar analyses at 8 and 16 GeV/c are compared with the predictions of a double-exchange model and good agreement is obtained. Neither interpretation of this phenomenon as a resonance nor as a consequence of diffraction dissociation in the usual definition, non-resonating single pomeron exchange, explains all the features of the results.",
author = "G. Berlad and B. Haber and Hodous, {M. F.} and Hulsizer, {R. I.} and V. Kistiakowsky and A. Levy and Pless, {I. A.} and Singer, {R. A.} and J. Wolfson and Yamamoto, {R. K.}",
note = "Funding Information: There is now considerable evidence for the existence of an enhancement of the I = ½ (NTr) invariant mass spectrum centered about 1250 MeV. This has been observed in a cross channel isospin analysis oflr-+p ~ zr(Nrr) at 8 and 16 GeV/c \[1,2\], as well as final state isospin analysis oflr+p ~ 7r(NTr) at 8 and 16 GeV/c 13\] and 7r+N n(Nrr) at 13 GeV/c \[4\].I t has also been seen in pN ~ N(Nlr) \[51 and Kp ~ K(prr) \[6\].I n this paper we present further evidence for this enhancement from a cross channel isospin analysis of zr~p ~ rr(Nn) at 3.9 GeV/c. The application of cross channel isospin analysis to single-pion production processes was first suggested by Foldy and Peierls \[7\] and worked out in detail by Koba et al. \[8\].T his analysis permits the calculation of three amplitudes specified * This work is supported in part through funds provided by the Atomic Energy Commission under Contract No. AT(I 1-1) 3069. ** Present address: The Weizmann Institute of Science, Israel. *** On leave of absence from Tel-Aviv University, Israel. Present address: Argonne National Laboratory, Argonne, Illinois.",
year = "1974",
month = jun,
day = "11",
doi = "10.1016/0550-3213(74)90467-2",
language = "אנגלית",
volume = "75",
pages = "93--111",
journal = "Nuclear Physics, Section B",
issn = "0550-3213",
publisher = "Elsevier",
number = "1",
}