Lepton mass effects in single pion production by neutrinos

被引：91

作者：

Berger, Ch. ^{[1
]}

Sehgal, L. M. ^{[2
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany

[2] Rhein Westfal TH Aachen, Inst Theoret Phys E, D-5100 Aachen, Germany

来源：

PHYSICAL REVIEW D | 2007年 / 76卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.76.113004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We reconsider the Feynman-Kislinger-Ravndal model applied to neutrino-excitation of baryon resonances. The effects of lepton mass are included, using the formalism of Kuzmin, Lyubushkin, and Naumov. In addition we take account of the pion-pole contribution to the hadronic axial vector current. Application of this new formalism to the reaction nu(mu)+p ->mu(-)+Delta(++) at E-nu similar to 1 GeV gives a suppressed cross section at small angles, in agreement with the screening correction in Adler's forward-scattering theorem. Application to the process nu(tau)+p ->tau(-)+Delta(++) at E-nu similar to 7 GeV leads to the prediction of right-handed tau(-) polarization for forward-going leptons, in line with a calculation based on an isobar model. Our formalism represents an improved version of the Rein-Sehgal model, incorporating lepton mass effects in a manner consistent with partially conserved axial-vector current.

引用

页数：8

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