Evidence for Δ− components in nuclei

• Published in: Physics letters. B Vol. 419; no. 1; pp. 25 - 29
• Main Authors: Morris, C.L., Zumbro, J.D., McGill, J.A., Seestrom, S.J., Whitton, R.M., Reidel, C.M., Williams, A.L., Braunstein, M.R., Kohler, M.D., Kriss, B.J., Høibråten, S., Ouyang, J., Peterson, R.J., Wise, J.E.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 12.02.1998
• Subjects: 25.80.Hp; 24.80.-x; 21.65.+f
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/S0370-2693(97)01453-6

Ratios of double-differential cross sections for incident 500-MeV pions are presented for ( π +, π +p) and ( π +, π −p) reactions on 12,13C, 90Zr, and 208Pb. A comparison with intra-nuclear cascade-model calculations suggest that the outgoing pion spectra show a feature consistent with quasi-free scattering from the Δ − component of the nuclear ground state wave function.