Search for production of an invisible dark photon in (0) decays

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Gil, E Cortina, Kleimenova, A, Minucci, E, Padolski, S, Petrov, P, Shaikhiev, A, Volpe, R, Georgiev, G, Kozhuharov, V, Litov, L et al (show 190 more authors) , Numao, T, Petrov, Y, Velghe, B, Bryman, D, Fu, J, Husek, T, Jerhot, J, Kampf, K, Zamkovsky, M, Aliberti, R, Khoriauli, G, Kunze, J, Lomidze, D, Peruzzo, L, Vormstein, M, Wanke, R, Dalpiaz, P, Fiorini, M, Neri, I, Norton, A, Petrucci, F, Wahl, H, Ramusino, A Cotta, Gianoli, A, Iacopini, E, Latino, G, Lenti, M, Parenti, A, Bizzeti, A, Bucci, F, Antonelli, A, Lanfranchi, G, Mannocchi, G, Martellotti, S, Moulson, M, Spadaro, T, Ambrosino, F, Capussela, T, Corvino, M, Di Filippo, D, Massarotti, P, Mirra, M, Napolitano, M, Saracino, G, Anzivino, G, Brizioli, F, Imbergamo, E, Lollini, R, Piandani, R, Santoni, C, Barbanera, M, Cenci, P, Checcucci, B, Lubrano, P, Lupi, M, Pepe, M, Piccini, M, Costantini, F, Di Lella, L, Doble, N, Giorgi, M, Giudici, S, Lamanna, G, Lari, E, Pedreschi, E, Sozzi, M, Cerri, C, Fantechi, R, Pontisso, L, Spinella, F, Mannelli, I, D'Agostini, G, Raggi, M, Biagioni, A, Leonardi, E, Lonardo, A, Valente, P, Vicini, P, Ammendola, R, Bonaiuto, V, Fucci, A, Salamon, A, Sargeni, F, Arcidiacono, R, Bloch-Devaux, B, Boretto, M, Menichetti, E, Migliore, E, Soldi, D, Biino, C, Filippi, A, Marchetto, F, Engelfried, J, Estrada-Tristan, N, Bragadireanu, AM, Ghinescu, SA, Hutanu, OE, Enik, T, Falaleev, V, Kekelidze, V, Korotkova, A, Madigozhin, D, Misheva, M, Molokanova, N, Movchan, S, Polenkevich, I, Potrebenikov, Yu, Shkarovskiy, S, Zinchenko, A, Fedotov, S, Gushchin, E, Khotyantsev, A, Kudenko, Y, Kurochka, V, Medvedeva, M, Mefodev, A, Kholodenko, S, Kurshetsov, V, Obraztsov, V, Ostankov, A, Semenov, V, Sugonyaev, V, Yushchenko, O, Bician, L, Blazek, T, Cerny, V, Kucerova, Z, Bernhard, J, Ceccucci, A, Danielsson, H, De Simone, N, Duval, F, Dobrich, B, Federici, L, Gamberini, E, Gatignon, L, Guida, R, Hahn, F, Holzer, EB, Jenninger, B, Koval, M, Laycock, P, Miotto, G Lehmann, Lichard, P, Mapelli, A, Marchevski, R, Massri, K, Noy, M, Palladino, V, Perrin-Terrin, M, Pinzino, J, Ryjov, V, Schuchmann, S, Venditti, S, Bache, T, Brunetti, MB, Duk, V, Fascianelli, V, Fry, JR, Gonnella, F, Goudzovski, E, Iacobuzio, L, Lazzeroni, C, Lurkin, N, Newson, F, Parkinson, C, Romano, A, Sergi, A, Sturgess, A, Swallow, J, Heath, H, Page, R, Trilov, S, Angelucci, B, Britton, D, Graham, C, Protopopescu, D, Carmignani, J, Dainton, JB, Jones, RWL, Ruggiero, G, Fulton, L, Hutchcroft, D ORCID: 0000-0002-4174-6509, Maurice, E, Wrona, B, Conovaloff, A, Cooper, P, Coward, D, Rubin, P and Collaboration, NA62 (2019) Search for production of an invisible dark photon in (0) decays. JOURNAL OF HIGH ENERGY PHYSICS, 2019 (5).

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title> <jats:p>The results of a search for <jats:italic>π</jats:italic> <jats:sup>0</jats:sup> 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 × 10<jats:sup>8</jats:sup> tagged <jats:italic>π</jats:italic> <jats:sup>0</jats:sup> 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/<jats:italic>c</jats:italic> <jats:sup>2</jats:sup>. The present results are interpreted in terms of an upper limit of the branching ratio of the electro-weak decay <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ {\pi}^0\to \gamma \nu \overline{\nu} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>π</mml:mi> <mml:mn>0</mml:mn> </mml:msup> <mml:mo>→</mml:mo> <mml:mi>γ</mml:mi> <mml:mi>ν</mml:mi> <mml:mover> <mml:mi>ν</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> </jats:alternatives> </jats:inline-formula>, improving the current limit by more than three orders of magnitude.</jats:p>

Item Type:	Article
Uncontrolled Keywords:	Beyond Standard Model, Exotics, Fixed target experiments, Rare decay
Depositing User:	Symplectic Admin
Date Deposited:	15 Aug 2019 09:47
Last Modified:	19 Jan 2023 00:29
DOI:	10.1007/JHEP05(2019)182
Open Access URL:	http://doi.org/10.1007/JHEP05(2019)182
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3051817