Experimental Study of Muon Pairs Produced by 252-GeV Pions on Tungsten

The E615 collaboration Conway, J.S. ; Adolphsen, C.E. ; Alexander, J.P. ; et al.
Phys.Rev.D 39 (1989) 92-122, 1989.
Inspire Record 280845 DOI 10.17182/hepdata.23151

We present the results of a study of muon pairs with invariant masses greater than 4.05 GeV/c2 produced in high-energy pion-nucleon interactions. The production cross section together with the inferred pion and nucleon structure functions are reported and compared with other experiments and with QCD predictions. The transverse-momentum distributions are also presented. Finally, the full angular distribution in cosθ and φ is given as a function of mass, Feynman x, and transverse momentum. Longitudinal photon polarization is seen in the lower portion of the mass range at high xπ. This result is compared with a higher-twist model.

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