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Search for eV (pseudo)scalar penetrating particles in the SPS neutrino beam

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Search for eV (pseudo)scalar penetrating particles in the SPS neutrino beam

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dc.contributor.author NOMAD Collaboration
dc.contributor.author Astier, P.
dc.contributor.author Cervera Villanueva, Anselmo
dc.contributor.author Gómez Cadenas, Juan José
dc.date.accessioned 2015-12-21T09:48:36Z
dc.date.available 2015-12-21T09:48:36Z
dc.date.issued 2000
dc.identifier.citation NOMAD Collaboration Astier, P. Cervera Villanueva, Anselmo Gómez Cadenas, Juan José 2000 Search for eV (pseudo)scalar penetrating particles in the SPS neutrino beam Physics Letters B 479 4 371 380
dc.identifier.uri http://hdl.handle.net/10550/49648
dc.description.abstract We carried out a model-independent search for light scalar or pseudoscalar particles a's (an example of which is the axion) that couple to two photons by using a photon-regeneration method at high energies allowing a substantial increase in the sensitivity to eV masses.\ The experimental set-up is based on elements of the CERN West Area Neutrino Facility (WANF) beam line and theNOMAD neutrino detector.\ The new particles, if they exist, could be produced through the Primakoff effect in interactions of high energy photons, generated by the 450 GeV protons in the CERN SPS neutrino target, with virtual photons from the WANF horn magnetic field.\ The particles would penetrate the downstream shieldingand would be observed in the NOMAD neutrino detector through their re-conversion into real high energy photons byinteracting with the virtual photons from the magnetic field of the NOMAD dipole magnet.\ From the analysis of the data collected during the 1996 run with 1.08×1019 protons on target, 312 candidate events with energy between 5 and 140 GeV were found.\ This number is in general agreement with the expectation of 272±18 background events from standard neutrino processes.\ A 90 % CL upper limit on the aγγ-coupling gaγγ< 1.5×10−4 GeV−1 for a masses up to 40 eV is obtained.
dc.language.iso eng
dc.relation.ispartof Physics Letters B, 2000, vol. 479, num. 4, p. 371-380
dc.subject Física
dc.title Search for eV (pseudo)scalar penetrating particles in the SPS neutrino beam
dc.type journal article es_ES
dc.date.updated 2015-12-21T09:48:36Z
dc.identifier.doi 10.1016/S0370-2693(00)00375-0
dc.identifier.idgrec 069915
dc.rights.accessRights open access es_ES

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