First observation of hadron production in e+e- collisions at 13 and 17 GeV CMS energy with the pluto detector at petra Pluto Collaboration

Details First observation of hadron production in e+e- collisions at 13 and 17 GeV CMS energy with the pluto detector at petra Pluto Collaboration First observation of hadron production in e+e- collisions at 13 and 17 GeV CMS energy with the pluto detector at petra Pluto Collaboration

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979phlb...81..410b&link_type=abstract

Physics Letters B, Volume 81, Issue 3-4, p. 410-415.

Physics

40

Scientific paper

First results from the magnetic detector PLUTO at the new e+e- storage ring PETRA are shown. The ratio R of the cross section for hadron production to that for μ-pair production has been measured to be R = 5.0 +/- 0.5 at 13 GeV and 4.3 +/-0.5 at 17 GeV. Both values have an additional systematic error of 20%. The events show a typical 2-jet structure. The mean transverse momentum approaches a constant value with increasing energy implying a shrinkage of the jet opening angle.

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