Dark photon search in the mass range between 1.5 and 3.4 GeV/c2

The BESIII Collaboration

Результат исследования: Научные публикации в периодических изданияхстатья

21 Цитирования (Scopus)

Аннотация

Using a data set of 2.93 fb−1 taken at a center-of-mass energy s=3.773 GeV with the BESIII detector at the BEPCII collider, we perform a search for an extra U(1) gauge boson, also denoted as a dark photon. We examine the initial state radiation reactions e+e→e+eγISR and e+e→μ+μγISR for this search, where the dark photon would appear as an enhancement in the invariant mass distribution of the leptonic pairs. We observe no obvious enhancement in the mass range between 1.5 and 3.4 GeV/c2 and set a 90% confidence level upper limit on the mixing strength of the dark photon and the Standard Model photon. We obtain a competitive limit in the tested mass range.

Язык оригиналаанглийский
Страницы (с-по)252-257
Число страниц6
ЖурналPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Том774
DOI
СостояниеОпубликовано - 10 ноя 2017

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