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Search for a new gauge boson in pi(0) decays
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| dc.contributor.author | NOMAD Collaboration | |
| dc.contributor.author | Altegoer, J. | |
| dc.contributor.author | Cervera Villanueva, Anselmo | |
| dc.contributor.author | Gómez Cadenas, Juan José | |
| dc.date.accessioned | 2015-12-21T10:22:18Z | |
| dc.date.available | 2015-12-21T10:22:18Z | |
| dc.date.issued | 1998 | |
| dc.identifier.citation | NOMAD Collaboration Altegoer, J. Cervera Villanueva, Anselmo Gómez Cadenas, Juan José 1998 Search for a new gauge boson in pi(0) decays Physics Letters B 428 1-2 197 205 | |
| dc.identifier.uri | http://hdl.handle.net/10550/49651 | |
| dc.description.abstract | A search was made for a new light gauge boson X which might be produced in pi(0) -->, gamma + X decay from neutral pions generated by 450 GeV protons in the CERN SPS neutrino target. The X's would penetrate the downstream shielding and be observed in the NOMAD detector via the Primakoff effect, in the process of X --> pi(0) conversion in the external Coulomb field of a nucleus. With 1.45 x 10(18) protons on target, 20 candidate events with energy between 8 and 140 GeV were found from the analysis of neutrino data. This number is in agreement with the expectation of 18.1 +/- 2.8 background events from standard neutrino processes. A new 90% C.L. upper limit on the branching ratio Br(pi(0) --> Y + X)< (3.3 to 1.9)X 10(-5) for X masses ranging from 0 to 120 MeV/c(2) is obtained. | |
| dc.language.iso | eng | |
| dc.relation.ispartof | Physics Letters B, 1998, vol. 428, num. 1-2, p. 197-205 | |
| dc.subject | Física | |
| dc.title | Search for a new gauge boson in pi(0) decays | |
| dc.type | journal article | es_ES |
| dc.date.updated | 2015-12-21T10:22:18Z | |
| dc.identifier.doi | 10.1016/S0370-2693(98)00402-X | |
| dc.identifier.idgrec | 069927 | |
| dc.rights.accessRights | open access | es_ES |
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