Search for a light dark photon in muonium decay


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Аннотация

About 0.85 × 105 events involving stopped μ+ and muonium decay were observed in a nuclear photoemulsion with the aim of searches for a light dark photon (DPh) in the decay process DPh → e+e. With a probability of about 10−5, no event of the decay μ+е+νμνе accompanied by an electron–positron pair was observed. In the interval of 1.1 MeV ≤ mDPh ≤ 60 MeV, the mixing parameter ε2 was estimated at about 10−5 to 10−4.

Авторлар туралы

V. Dubinina

Institute for Theoretical and Experimental Physics

Email: vladimir@itep.ru
Ресей, Bol’shaya Cheremuskinskaya ul. 25, Moscow, 117218

N. Egorenkova

Institute for Theoretical and Experimental Physics

Email: vladimir@itep.ru
Ресей, Bol’shaya Cheremuskinskaya ul. 25, Moscow, 117218

E. Pozharova

Institute for Theoretical and Experimental Physics

Email: vladimir@itep.ru
Ресей, Bol’shaya Cheremuskinskaya ul. 25, Moscow, 117218

N. Polukhina

Lebedev Physical Institute; National Research Nuclear University MEPhI

Email: vladimir@itep.ru
Ресей, Leninskii pr. 53, Moscow, 119991; Kashirskoe sh. 31, Moscow, 115409

V. Smirnitsky

Institute for Theoretical and Experimental Physics

Хат алмасуға жауапты Автор.
Email: vladimir@itep.ru
Ресей, Bol’shaya Cheremuskinskaya ul. 25, Moscow, 117218

N. Starkov

Lebedev Physical Institute

Email: vladimir@itep.ru
Ресей, Leninskii pr. 53, Moscow, 119991

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