Adare, A. and Afanasiev, S. and Aidala, C. and Ajitanand, N. N. and Akiba, Y. and Csanád, Máté and Csörgő, Tamás and Dávid, Gábor and Imrek, József and Kiss, Ádám and Varga-Kőfaragó, Mónika and Nagy, Márton and Ster, András and Sziklai, János István and Tarján, Péter and Vargyas, Márton and Vértesi, Róbert (2015) Search for dark photons from neutral meson decays in p+p and d+Au collisions at √sNN=200 GeV. PHYSICAL REVIEW C, 91. ISSN 2469-9985
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Abstract
The standard model (SM) of particle physics is spectacularly successful, yet the measured value of the muon anomalous magnetic moment (g − 2)μ deviates from SM calculations by 3.6σ. Several theoretical models attribute this to the existence of a “dark photon,” an additional U(1) gauge boson, which is weakly coupled to ordinary photons. The PHENIX experiment at the Relativistic Heavy Ion Collider has searched for a dark photon, U , in π0, η → γe+e− decays and obtained upper limits of O(2 × 10−6) on U -γ mixing at 90% CL for the mass range 30 < mU < 90 MeV/c2. Combined with other experimental limits, the remaining region in the U -γ mixing parameter space that can explain the (g − 2)μ deviation from its SM value is nearly completely excluded at the 90% confidence level, with only a small region of 29 < mU < 32 MeV/c2 remaining
Item Type: | Article |
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Subjects: | Q Science / természettudomány > QC Physics / fizika |
SWORD Depositor: | MTMT SWORD |
Depositing User: | MTMT SWORD |
Date Deposited: | 10 Oct 2023 14:25 |
Last Modified: | 10 Oct 2023 14:25 |
URI: | http://real.mtak.hu/id/eprint/176448 |
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