Search for a new gauge boson in $π^{0}$ decays
| dc.creator | The NOMAD Collaboration | |
| dc.creator | al, J. Altegoer et | |
| dc.date | 1998-04-05 | |
| dc.date.accessioned | 2026-07-07T12:02:21Z | |
| dc.date.available | 2026-07-07T12:02:21Z | |
| dc.description | A search was made for a new light gauge boson $X$ which might be produced in $π^{0}\toγ+ X$ 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 $X \toπ^{0}$ conversion in the external Coulomb field of a nucleus. With $1.45\times10^{18}$ 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$\pm$2.8 background events from standard neutrino processes. A new 90% C.L. upper limit on the branching ratio $Br(π^{0}\toγ+ X)< (3.3 to 1.9) \times10^{-5}$ for $X$ masses ranging from 0 to 120 MeV/c^2 is obtained. | |
| dc.description | 15 pages, LaTex, 6 eps figures included, submitted to Physics Letters B | |
| dc.identifier | https://arxiv.org/abs/hep-ex/9804003 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/9804003 | |
| dc.identifier | Phys.Lett.B428:197-205,1998 | |
| dc.identifier | doi:10.1016/S0370-2693(98)00402-X | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/207409 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Search for a new gauge boson in $π^{0}$ decays | |
| dc.type | text |