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The NA62 experiment at CERN Super Proton Synchrotron was designed to measure BR(K+ → π+νv̄) with an in-fight technique, never used before for this measurement. This decay is characterised by a very precise prediction in the Standard Model. Its branching ratio, which is expected to be less than 10-10, is one of the best candidates to indicate indirect effects of new physics beyond SM at the highest mass scales. NA62 result on K+ → π+νv̄ from the full 2016 data set is described. Also a search for an invisible dark photon A′ has been performed, exploiting the efficient photon-veto capability and high resolution tracking of the NA62. The signal stems from the chain K+ → π+π0 followed by π0 → A′γ. No significant statistical excess has been identified. Upper limits on the dark photon coupling to the ordinary photon as a function of the dark photon mass have been set, improving on the previous limits over the mass range 60 - 110 MeV/c2.
Physics beyond the standard model with kaons at NA62 / Massarotti, P., Aliberti, R., Ambrosino, F., Ammendola, R., Angelucci, B., Antonelli, A., Anzivino, G., Arcidiacono, R., Barbanera, M., Biagioni, A., Bician, L., Biino, C., Bizzeti, A., Blazek, T., Bloch-Devaux, B., Bonaiuto, V., Boretto, M., Bragadireanu, M., Britton, D., Brizioli, F., et al.. - In: AIP CONFERENCE PROCEEDINGS. - ISSN 0094-243X. - 2249:(2020), p. 030003. (15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, MENU 2019 Carnegie Mellon University, usa 2019) [10.1063/5.0009508].
Physics beyond the standard model with kaons at NA62
The NA62 experiment at CERN Super Proton Synchrotron was designed to measure BR(K+ → π+νv̄) with an in-fight technique, never used before for this measurement. This decay is characterised by a very precise prediction in the Standard Model. Its branching ratio, which is expected to be less than 10-10, is one of the best candidates to indicate indirect effects of new physics beyond SM at the highest mass scales. NA62 result on K+ → π+νv̄ from the full 2016 data set is described. Also a search for an invisible dark photon A′ has been performed, exploiting the efficient photon-veto capability and high resolution tracking of the NA62. The signal stems from the chain K+ → π+π0 followed by π0 → A′γ. No significant statistical excess has been identified. Upper limits on the dark photon coupling to the ordinary photon as a function of the dark photon mass have been set, improving on the previous limits over the mass range 60 - 110 MeV/c2.
Physics beyond the standard model with kaons at NA62 / Massarotti, P., Aliberti, R., Ambrosino, F., Ammendola, R., Angelucci, B., Antonelli, A., Anzivino, G., Arcidiacono, R., Barbanera, M., Biagioni, A., Bician, L., Biino, C., Bizzeti, A., Blazek, T., Bloch-Devaux, B., Bonaiuto, V., Boretto, M., Bragadireanu, M., Britton, D., Brizioli, F., et al.. - In: AIP CONFERENCE PROCEEDINGS. - ISSN 0094-243X. - 2249:(2020), p. 030003. (15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, MENU 2019 Carnegie Mellon University, usa 2019) [10.1063/5.0009508].
Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1210668
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