Evidence for longitudinal photon polarization in muon-pair production by pions

K. J. Anderson, R. N. Coleman, K. P. Karhi, C. B. Newman, J. E. Pilcher, E. I. Rosenberg, J. J. Thaler, G. E. Hogan, K. T. McDonald, G. H. Sanders, A. J.S. Smith

Research output: Contribution to journalArticle

Abstract

Data on-pair production by pions are examined as a function of x and PT for longitudinal photon polarization. Evidence in the form of a sin2* term in the helicity angular distribution is observed for x near 1. This is conclusive evidence that production in this region is not predominantly through on-shell quark annihilation. The result is consistent with a calculation based on quantum chromodynamics.

Original languageEnglish (US)
Pages (from-to)1219-1222
Number of pages4
JournalPhysical review letters
Volume43
Issue number17
DOIs
StatePublished - Jan 1 1979

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Evidence for longitudinal photon polarization in muon-pair production by pions'. Together they form a unique fingerprint.

  • Cite this

    Anderson, K. J., Coleman, R. N., Karhi, K. P., Newman, C. B., Pilcher, J. E., Rosenberg, E. I., Thaler, J. J., Hogan, G. E., McDonald, K. T., Sanders, G. H., & Smith, A. J. S. (1979). Evidence for longitudinal photon polarization in muon-pair production by pions. Physical review letters, 43(17), 1219-1222. https://doi.org/10.1103/PhysRevLett.43.1219