Test of s-channel helicity conservation in inelastic p0 diffraction in 20-GeV photoproduction

K. Abe, T. C. Bacon, J. Ballam, A. V. Bevan, H. H. Bingham, J. E. Brau, K. Braune, D. Brick, W. M. Bugg, J. M. Butler, W. Cameron, H. O. Cohn, G. Condo, D. C. Colley, S. Dado, R. Diamond, P. Dingus, R. Erickson, R. C. Field, B. FranekN. Fujiwara, R. Gearhart, T. Glanzman, I. M. Godfrey, J. J. Goldberg, A. T. Goshaw, G. Hall, E. R. Hancock, T. Handler, H. J. Hargis, E. L. Hart, M. J. Harwin, K. Hasegawa, R. I. Hulsizer, M. Jobes, G. E. Kalmus, D. P. Kelsey, T. Kitagaki, A. Levy, P. W. Lucas, W. A. Mann, E. McCrory, R. Merenyi, R. Milburn, C. Milstene, K. C. Moffeit, A. Napier, S. Noguchi, F. Ochiai, S. O'Neale, A. P.T. Palounek, I. A. Pless, P. Rankin, H. Sagawa, T. Sato, J. Schneps, S. J. Sewell, J. Shank, A. M. Shapiro, J. Shimony, R. Sugahara, A. Suzuki, K. Takahashi, K. Tamai, S. Tanaka, S. Tether, D. A. Waide, W. D. Walker, M. Widgoff, C. G. Wilkins, S. Wolbers, C. A. Woods, A. Yamaguchi, R. K. Yamamoto, S. Yamashita, Y. Yoshimura, G. P. Yost, H. Yuta

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


The reaction pfast0p+- has been studied with the linearly polarized 20-GeV monochromatic photon beam at the SLAC Hybrid Facility to test the prediction of s-channel helicity conservation in inelastic diffraction for t<0.4 (GeV/c)2. In a sample of 1934 events from this reaction, the 0 decay-angular distributions and spin-density-matrix elements are consistent with s-channel helicity conservation, the +- mass shape displays the same skewing as seen in the reaction pp+-, and the p+- mass distribution compares well and scales according to the vector dominance model with that produced in pfastp+-.

Original languageEnglish (US)
Pages (from-to)2288-2293
Number of pages6
JournalPhysical Review D
Issue number9
StatePublished - 1985
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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