Pion Production in Proton-Beryllium Collisions at 12.4 GeV/c

Cho, Y.; Derrick, M.; Marmer, G. J.; Wangler, T.P.; Day, John; Kalbaci, P.; Маршак, М. Л.; Randolph, J. K.; Key, A.W.

doi:10.1103/physrevd.4.1967

Cited by 34 publications

(26 citation statements)

References 11 publications

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“…Furthermore, a correction to rescale the HARP Sanford-Wang parametrization at 12.9 GeV/c beam momentum to the 10-15 GeV/c beam momenta of the past Al datasets is applied [22]. Given these model-dependent corrections, it was found that the HARP results are consistent with Ref.…”

Section: Comparison With Existing Forward Pion Production Data On Alumentioning

confidence: 65%

Measurement of the production cross-section of positive pions in p–Al collisions at

et al. 2006

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A precision measurement of the double-differential production cross-section, d2 σ π + /dpdΩ, for pions of positive charge, performed in the HARP experiment is presented. The incident particles are protons of 12.9 GeV/c momentum impinging on an aluminium target of 5% nuclear interaction length. The measurement of this cross-section has a direct application to the calculation of the neutrino flux of the K2K experiment. After cuts, 210 000 secondary tracks reconstructed in the forward spectrometer were used in this analysis. The results are given for secondaries within a momentum range from 0.75 GeV/c to 6.5 GeV/c, and within an angular range from 30 mrad to 210 mrad. The absolute normalization was performed using prescaled beam triggers counting protons on target. The overall scale of the cross-section is known to better than 6%, while the average point-to-point error is 8.2%.

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Section: Comparison With Existing Forward Pion Production Data On Alumentioning

confidence: 65%

Measurement of the production cross-section of positive pions in p–Al collisions at

et al. 2006

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“…New measurements with full-acceptance spectrometers are forthcoming from BNL E910 [150,132] which took thin-target data, from HARP at CERN which studied a replica of the MiniBooNE Be target [190] and of the K2K Al target, and from Fermilab E907 which studied 120 GeV/c protons incident on a replica of the NuMI target [160]. [156,25,81]. b Possible normalization discrepency with Allaby et al [17].…”

Section: Hadron Production Experimentsmentioning

confidence: 99%

“…The experiment scaled up the older, more complete d 2 N/dpdΩ results to agree with the normalizations of the newer experiment (such was suggested by Sanford & Wang, who had tried a fit to all invariant cross section data [189]) and quoted [141] 30% errors on the neutrino flux as a result. Another round of beam surveys was done [81] which fixed the normalization problem and covered the full phase space, and these results were used in subsequent papers [71,155]. As the authors of [71] put it: "The calculation of the ν flux ... requires a detailed discussion, which we will defer to a subsequent publication."…”

Section: Introductionmentioning

confidence: 99%

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Accelerator neutrino beams

Köpp

2007

Physics Reports

112

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Neutrino beams at from high-energy proton accelerators have been instrumental discovery tools in particle physics. Neutrino beams are derived from the decays of charged π and K mesons, which in turn are created from proton beams striking thick nuclear targets. The precise selection and manipulation of the π/K beam control the energy spectrum and type of neutrino beam. This article describes the physics of particle production in a target and manipulation of the particles to derive a neutrino beam, as well as numerous innovations achieved at past experimental facilities.

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“…The original analysis of the K2K oscillation data [30] used the Sanford-Wang fit of the so-called "Cho-CERN compilation" which was based largely on the production data of Cho et al [100]. The Cho data is from proton collisions with beryllium at 12.4 GeV/c necessitating a scaling in proton momentum and target atomic mass before being used to simulate the KEK beamline.…”

Section: C1 Significance Of Harp Data For K2kmentioning

confidence: 99%

A measurement of hadron production cross sections for the simulation of accelerator neutrino beams and a search for muon-neutrino to electron-neutrino oscillations in the Δm2 about equals 1-eV2 region

Schmitz

2008

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First, charged pion and proton production is measured at the HARP experiment for two experimental configurations relevant to two contemporary accelerator-based neutrino beams. Double-differential cross-sections for π + , π − and proton production are presented for proton+beryllium collisions at 8.9 GeV/c and proton+aluminum collisions at 12.9 GeV/c. These data have been used in the predictions of neutrino fluxes by the K2K experiment in Japan and the MiniBooNE and SciBooNE experiments at Fermilab.Second, a search for evidence of muon neutrino to electron neutrino oscillations at MiniBooNE is presented. MiniBooNE was designed to search for evidence of ν µ → ν e oscillations consistent with a mass-squared splitting near 1 eV 2 . Evidence of such an oscillation was reported by the LSND collaboration in the 1990s but has not been confirmed by other experiments. A method which combines the electron neutrino candidate sample with the high statistics muon neutrino candidate sample to define a single χ 2 statistic is developed. A complete description of experimental uncertainties is contained within a correlated error matrix which includes correlations between the two samples. This correlation reduces the uncertainty on the prediction of the smaller statistics electron sample and improves MiniBooNE's sensitivity to oscillations. Analysis of the MiniBooNE electron candidate data reveals no evidence of direct ν µ → ν e oscillations consistent with this interpretation of the LSND data.

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Pion Production in Proton-Beryllium Collisions at 12.4 GeV/c

Cited by 34 publications

References 11 publications

Measurement of the production cross-section of positive pions in p–Al collisions at

Measurement of the production cross-section of positive pions in p–Al collisions at

Accelerator neutrino beams

A measurement of hadron production cross sections for the simulation of accelerator neutrino beams and a search for muon-neutrino to electron-neutrino oscillations in the Δm<sup>2</sup> about equals 1-eV<sup>2</sup> region

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