Measurement of K+ production cross section by 8 GeV protons using high-energy neutrino interactions in the SciBooNE detector

作者：Cheng G^*; Mariani C; Alcaraz Aunion J L; Brice S J; Bugel L; Catala Perez J; Conrad J M; Djurcic Z; Dore U; Finley D A; Franke A J; Giganti C; Gomez Cadenas J J; Guzowski P; Hanson A; Hayato Y; Hiraide K; Jover Manas G; Karagiorgi G; Katori T; Kobayashi Y K; Kobilarcik T; Kubo H; Kurimoto Y; Louis W C; Loverre P F; Ludovici L; Mahn K B M; Masuike S; Matsuoka K; McGary V T; Metcalf W; Mills G B; Mitsuka G

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2011, 84(1): 012009.

DOI：10.1103/PhysRevD.84.012009

The SciBooNE Collaboration reports K+ production cross section and rate measurements using high-energy daughter muon neutrino scattering data off the SciBar polystyrene (C8H8) target in the SciBooNE detector. The K+ mesons are produced by 8 GeV protons striking a beryllium target in Fermilab Booster Neutrino Beam line (BNB). Using observed neutrino and antineutrino events in SciBooNE, we measure d(2)sigma/dpd Omega = (5.34 +/- 0.76) mb/(GeV/c x sr) for p + Be -> K+ + X at mean K+ energy of 3.9 GeVand angle (with respect to the proton beam direction) of 3.7 degrees, corresponding to the selected K+ sample. Compared to Monte Carlo predictions using previous higher energy K+ production measurements, this measurement, which uses the NUANCE neutrino interaction generator, is consistent with a normalization factor of 0.85 +/- 0.12. This agreement is evidence that the extrapolation of the higher energy K+ measurements to an 8 GeV beam energy using Feynman scaling is valid. This measurement reduces the error on the K+ production cross section from 40% to 14%.

• 出版日期2011-7-28
• 单位MIT; Los Alamos