abstract

• The NA62 experiment at CERN, designed to study the ultra-rare decay K -> pi( ) nu(nu) over bar, has also collected data in beam-dump mode. In this configuration, dark photons may be produced by protons dumped on an absorber and reach a decay volume beginning 80 m downstream. A search for dark photons decaying in flight to mu( ) mu(-) pairs is reported, based on a sample of 1.4 x 10(17) protons on dump collected in 2021. No evidence for a dark photon signal is observed. A region of the parameter space is excluded at 90%25 CL, improving on previous experimental limits for dark photon masses between 215 and 550MeV/c(2).

authors

• Engelfried Jatzkowski Jurgen
• The NA62 Collaboration

publication date

• 2023-01-01

funding provided via

• Charles University Research Center [UF100308]; Ministero dell\'Istruzione, dell\'Universit e della Ricerca (MIUR); (Project GAP), Italy [UF0758946, ST/J00412X/1]; Royal Society [ST/M005798/1, 268062]; STFC [336581, 802836, 701386]; ERC [754496, 842407, 893101, 101023808]; EU; [UNCE/SCI/013]; Marie Curie Actions (MSCA) [101023808] Funding Source: Marie Curie Actions (MSCA)  Grant

published in

• Journal of High Energy Physics  Journal

keywords

• Beyond Standard Model; Exotics; Fixed Target Experiments; Dark Matter

Digital Object Identifier (DOI)

• 10.1007/JHEP09(2023)035

PubMed ID

start page

end page

volume

issue

• 9