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

A 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 leng...

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Detalles Bibliográficos
Autores: HARP Collaboration, Catanesi, M. G., Apollonio, M., Cervera Villanueva, Anselmo, Burguet Castell, Jordi, Gómez Cadenas, Juan José, Novella, Pau, Sorel, Michel, Tornero, Ana María
Tipo de recurso: artículo
Fecha de publicación:2006
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/42701
Acceso en línea:http://hdl.handle.net/10261/42701
Access Level:acceso abierto
Palabra clave:ddc:500.2
Descripción
Sumario:A 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%.

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