Article
Search for dark photons from neutral meson decays in p plus p and d plus Au collisions at root s(NN)=200 GeV
Physical Review C
Document Type
Article
Publication Version
Published Version
Publication Date
3-10-2015
DOI
10.1103/PhysRevC.91.031901
Abstract
The 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. The PHENIX experiment at the Relativistic Heavy Ion Collider has searched for a dark photon, U, in pi(0), eta -> gamma e(+)e(-) decays and obtained upper limits of O(2 x 10(-6)) on U-gamma mixing at 90% C.L. for the mass range 30 < m(U) < 90 MeV/c(2). Combined with other experimental limits, the remaining region in the U-gamma mixing parameter space that can explain the (g - 2)(mu) deviation from its SM value is nearly completely excluded at the 90% confidence level, with only a small region of 29 < m(U) < 32 MeV/c(2) remaining.
Copyright Owner
American Physical Society
Copyright Date
2015
Language
en
File Format
application/pdf
Citation Information
Andrew Adare, Nicole Apadula, Sarah C. Campbell, Lei Ding, et al.. "Search for dark photons from neutral meson decays in p plus p and d plus Au collisions at root s(NN)=200 GeV" Physical Review C Vol. 91 Iss. 3 (2015) p. 031901 Available at: http://works.bepress.com/craig-ogilvie/53/
This is an article from Physical Review C 92 (2015): 031901, doi:10.1103/PhysRevC.91.031901. Posted with permission.