Lepton Mass Effects in Single Pion Production by Neutrinos - High Energy Physics - PhenomenologyReport as inadecuate




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Abstract: We reconsider the Feynman-Kislinger-Ravndal model applied toneutrino-excitation of baryon resonances. The effects of lepton mass areincluded, using the formalism of Kuzmin, Lyubushkin and Naumov. In addition wetake account of the pion-pole contribution to the hadronic axial vectorcurrent. Application of this new formalism to the reaction numu + p -> mu +Delta at Enu approx 1 GeV gives a suppressed cross section at small angles,in agreement with the screening correction in Adler-s forward scatteringtheorem. Application to the process nutau + p -> tau + Delta at Enu approx7 GeV leads to the prediction of right-handed tau polarization forforward-going leptons, in line with a calculation based on an isobar model. Ourformalism represents an improved version of the Rein-Sehgal model,incorporating lepton mass effects in a manner consistent with PCAC.



Author: Ch. Berger, L. M. Sehgal

Source: https://arxiv.org/







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