Rescaling the cc data using the prediction that nc 1

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Unformatted text preview: dels involving Á resonance production Kelkar et al. (1997), Singh et al. (2006), AlvarezRuso et al. (2007), Amaro et al. (2009), T. Leitner et al. (2009), Hernandez et al. (2010), Nakamura, S. X. et al. (2010), and Martini, Ericson, and Chanfray (2011). Because this latter class involves Á formation, their validity is limited to the low-energy region. An excellent review of the current experimental and theoretical situation is available in AlvarezRuso (2011a). The study and prediction of coherent pion production is important as it provides another source of potential background for neutrino oscillation experiments. E. Multipion production As mentioned, the baryonic resonances created in neutrino-nucleon interactions can potentially decay to multipion final states. Other inelastic processes, such as deep inelastic scattering, can also contribute a copious source TABLE XIII. Modern measurements of CC (top) and NC (bottom) coherent pion production by neutrinos, at the time of this writing. Measurements are listed from K2K (Hasegawa et al., 2005), MiniBooNE (Aguilar-Arevalo et al., 2008), NOMAD (Kullenberg et al., 2009), and SciBooNE (Hiraide et al., 2008; Kurimoto et al., 2010a, 2010b). All are ratio measurements performed at low energy, with the exception of the absolute coherent pion production cross section measurement recently reported by NOMAD. Higher energy coherent pion production results have also been recently reported by the MINOS experiment (Cherdack, 2011). Experiment Target E Measurement K2K SciBooNE SciBooNE MiniBooNE NOMAD SciBooNE C8 H8 C8 H8 C8 H8 CH2 C-based C8 H8 1.3 GeV 1.1 GeV 1.1, 2.2 GeV 1.1 GeV 24.8 GeV 1.1 GeV ðCC coherent þ =CCÞ ðCC coherent þ =CCÞ ðCC coherent þ =NC coherent 0 Þ ðNC coherent 0 =NC 0 Þ ðNC coherent 0 Þ ðNC coherent 0 =CCÞ Rev. Mod. Phys., Vol. 84, No. 3, July–September 2012 Joseph A. Formaggio and G. P. Zeller: From eV to EeV: Neutrino cross sections . . . ) (10-38 cm2 / ncl.) 1332 1 + - 10 -1 µ- p ANL, PRD 28, 2714 (1983), D BNL, PRD 34, 2554 (1986), D 2 2 NUANCE (resonant+DIS) ( µ n 10 -2 0 2 4 6 8 10 12 14 16 18 E (GeV) FIG. 23. Existing measurements of the  n ! À pþ À scattering cross section as a function of neutrino energy. Also shown is the prediction from Casper (2002) including both resonant and DIS contributions to this reaction channel. of multipion final states depending on the neutrino energy. Figures 23–25 show existing measurements of neutrinoinduced di-pion production cross sections compared to an example prediction including contributions from both resonant and deep inelastic scattering mechanisms. Because of the inherent complexity of reconstructing multiple pions final states, there are not many existing experimental measurements of this process. All of the existing measurements have been performed strictly using deuterium-filled bubble chambers. Improved measurements will be important because they test our understanding of the transition regio...
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