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

doi:10.1103/PhysRevLett.43.1219

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

Physics

Research output: Contribution to journal › Article

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 language	English (US)
Pages (from-to)	1219-1222
Number of pages	4
Journal	Physical review letters
Volume	43
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.43.1219
State	Published - Jan 1 1979

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.43.1219

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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

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

In: Physical review letters, Vol. 43, No. 17, 01.01.1979, p. 1219-1222.

Research output: Contribution to journal › Article

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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.",

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

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AU - Rosenberg, E. I.

AU - Thaler, J. J.

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