The results of a search for π0 decays to a photon and an invisible massive dark photon at the NA62 experiment at the CERN SPS are reported. From a total of 4.12 × 108 tagged π0 mesons, no signal is observed. Assuming a kinetic-mixing interaction, limits are set on the dark photon coupling to the ordinary photon as a function of the dark photon mass, improving on previous searches in the mass range 60–110 MeV/c2. The present results are interpreted in terms of an upper limit of the branching ratio of the electro-weak decay π→ γνν¯ , improving the current limit by more than three orders of magnitude.

Search for production of an invisible dark photon in π 0 decays / Cortina Gil, E., Kleimenova, A., Minucci, E., Padolski, S., Petrov, P., Shaikhiev, A., Volpe, R., Georgiev, G., Kozhuharov, V., Litov, L., Numao, T., Petrov, Y., Velghe, B., Bryman, D., Fu, J., Husek, T., Jerhot, J., Kampf, K., Zamkovsky, M., Aliberti, R., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2019:5(2019), pp. N/A-N/A. [10.1007/JHEP05(2019)182]

Search for production of an invisible dark photon in π 0 decays

Bizzeti A.;
2019

Abstract

The results of a search for π0 decays to a photon and an invisible massive dark photon at the NA62 experiment at the CERN SPS are reported. From a total of 4.12 × 108 tagged π0 mesons, no signal is observed. Assuming a kinetic-mixing interaction, limits are set on the dark photon coupling to the ordinary photon as a function of the dark photon mass, improving on previous searches in the mass range 60–110 MeV/c2. The present results are interpreted in terms of an upper limit of the branching ratio of the electro-weak decay π→ γνν¯ , improving the current limit by more than three orders of magnitude.
2019
Inglese
2019
5
N/A
N/A
Beyond Standard Model; Exotics; Fixed target experiments; Rare decay
open
info:eu-repo/semantics/article
Contributo su RIVISTA::Articolo su rivista
262
Search for production of an invisible dark photon in π 0 decays / Cortina Gil, E., Kleimenova, A., Minucci, E., Padolski, S., Petrov, P., Shaikhiev, A., Volpe, R., Georgiev, G., Kozhuharov, V., Litov, L., Numao, T., Petrov, Y., Velghe, B., Bryman, D., Fu, J., Husek, T., Jerhot, J., Kampf, K., Zamkovsky, M., Aliberti, R., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2019:5(2019), pp. N/A-N/A. [10.1007/JHEP05(2019)182]
Cortina Gil, E.; Kleimenova, A.; Minucci, E.; Padolski, S.; Petrov, P.; Shaikhiev, A.; Volpe, R.; Georgiev, G.; Kozhuharov, V.; Litov, L.; Numao, T.; ...espandi
199
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1210024
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