RevModPhys.84.1307

Also shown is the prediction from casper 2002

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Unformatted text preview: n and will provide a constraint on potential backgrounds for neutrino oscillation experiments operating in higher energy beams. F. Kaon production Neutrino interactions in this energy range can also produce final states involving strange quarks. Some of the contributing strange production channels at intermediate energies include the following processes: (10-38 cm2 / ncl.) CC:  n ! 1 À K þ Ã0 NC:  p !  K þ Ã 0 0) + µ- p NUANCE (resonant+DIS)  p ! À K þ Æþ   n !   K 0 Æ0   n !  À K þ Æ0   n !   K þ ÆÀ   n !   K À Æþ : (79) ( µ p 10 -2   p !   K 0 Æþ   n !  À K 0 Æþ ANL, PRD 28, 2714 (1983), D 2   p !   K þ Æ0  n ! À K þ n -1  n !  K 0 Ã 0  n ! À K0 p 10  p !  À K þ p 1 2 3 4 5 6 7 E (GeV) (10-38 cm2 / ncl.) FIG. 24. Existing measurements of the  p ! À pþ 0 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. 1 + +) 10-1 µ- n ANL, PRD 28, 2714 (1983), D2 NUANCE (resonant+DIS) ( µ p 10 -2 1 2 3 4 5 6 7 E (GeV) FIG. 25. Existing measurements of the  p ! À nþ þ 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. Rev. Mod. Phys., Vol. 84, No. 3, July–September 2012 These reactions typically have small cross sections due in part to the kaon mass and because the kaon channels are not enhanced by any dominant resonance. Measuring neutrinoinduced kaon production is of interest primarily as a source of potential background for proton decay searches. Proton decay " modes containing a final-state kaon, p ! Kþ , have large branching ratios in many supersymmetry grand unified theory models. Because there is a nonzero probability that an atmospheric neutrino interaction can mimic such a proton decay signature, estimating these background rates has become an increasingly important component to such searches. Figure 26 shows the only two experiments which have published cross sections on the dominant associated production channel,  n ! À K þ Ã0 . Both bubble chamber measurements were performed on a deuterium target and are based on less than 30 events combined. Many other measurements of strange particle production yields have been performed throughout the years, most using bubble chambers (Barish et al., 1974; Deden et al., 1975; Berge et al., 1976, 1978; Blietschau et al., 1976; Bell et al., 1978; Hasert et al., 1978; Krenz et al., 1978b; Baker et al., 1981, 1986; Bosetti et al., 1982; Brock et al., 1982; Grassler et al., 1982; Son et al., 1983; Aderholz et al., 1992; Willocq et al., 1992; Jones et al., 1993; DeProspo et al., 1994; Agababyan et al., 2006). More recently, NOMAD has reported NC and CC strange particle production yields and multiplicities for a variety of reaction kinematics (Astier et al.,...
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This document was uploaded on 09/28/2013.

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