Search for Dark Photons from Neutral Meson Decays in [math][mi]p[/mi][mo]+[/mo][mi]p[/mi][/math] and [math][mi]d[/mi][mo]+[/mo][mi Mathvariant
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Published: 2015
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DOWNLOAD EBOOKThe standard model (SM) of particle physics is spectacularly successful, yet the measured value of the muon anomalous magnetic moment (g-2)[mu] deviates from SM calculations by 3.6[sigma]. 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. For this study, the PHENIX experiment at the Relativistic Heavy Ion Collider has searched for a dark photon, U, in [pi]0, [eta]2!gamma]e+e- decays and obtained upper limits of [theta](2×10-6) on U-[gamma] mixing at 90% C.L. for the mass range 30