A method for identifying stopped pions in a high-resolution scintillator bar detector is presented. I apply my technique to measure the axial mass MADelta for production of the Delta(1232) resonance by neutrino, with the result M ADelta = 1.16 +/- 0.20 GeV (68% CL) (limited by statistics). The result is produced from the measured spectrum of reconstructed momentum-transfer Q2. I proceed by varying the value of MADelta in a Rein-Sehgal-based Monte Carlo to produce the best agreement, using shape only (not normalization). The consistency of this result with recent reanalyses of previous bubble-chamber experiments is discussed.
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- Physics, Elementary Particles and High Energy;Physics, Astronomy and Astrophysics;Physics, Radiation