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Title

Measurement of the production cross-section of positive pions in p-Al collisions at 12.9 GeV/c

AuthorsHARP Collaboration; Catanesi, M. G.; Apollonio, M.; Cervera Villanueva, Anselmo ; Burguet Castell, Jordi; Gómez Cadenas, Juan José ; Novella, Pau ; Sorel, Michel ; Tornero, Ana María
Issue Date2-Jan-2006
PublisherElsevier
CitationNuclear Physics - Section B 732 (1-2): 1-45 (2006)
AbstractA precision measurement of the double-differential production cross-section, d(2)sigma(pi+)/dpd Omega 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, 210000 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 to 6.5 GeV/c. and within an angular range from 30 mrad to 2 10 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%.
Publisher version (URL)http://dx.doi.org/10.1016/j.nuclphysb.2005.10.016
URIhttp://hdl.handle.net/10261/42701
DOI10.1016/j.nuclphysb.2005.10.016
ISSN0550-3213
Appears in Collections:(IFIC) Artículos
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