Search for dark photons from neutral meson decays in p+p and d+Au collisions at √sNN = 200 GeV

• Published in: Physical review. C, Nuclear physics Nuclear physics, 2015-03, Vol.91 (3)
• Main Authors: Akimoto, R., Alfred, M., Appelt, E., Asai, J., Averbeck, R., Baksay, G., Barnes, P. D., Bassalleck, B., Ben-Benjamin, J., Camacho, C. M., Campbell, S., Castera, P., Churyn, A., Cole, B. A., Constantin, P., Dehmelt, K., Deshpande, A., Desmond, E. J., Ding, L., Drees, K. A., Durum, A., Efremenko, Y. V., Fields, D. E., Fleuret, F., Franz, A., Fujiwara, K., Garg, P., Gong, X., Grosse Perdekamp, M., Hachiya, T., Haggerty, J. S., Hahn, K. I., Hamagaki, H., Holzmann, W., Hori, Y., Hoshino, T., Ishihara, M., Issah, M., Jeon, S. J., Kang, J. S., Kasai, M., Khachatryan, V., Kijima, K. M., Kim, D. H., Kim, S. H., Kim, Y. J., Kim, Y. K., Koblesky, T., Lee, S. H., Lichtenwalner, P., Liebing, P., Maguire, C. F., Manion, A., Masui, H., Means, N., Meles, A., Meredith, B., Mitchell, J. T., Moon, H. J., Motschwiller, S., Nam, S., Nguyen, M., Niida, T., Nouicer, R., Novitzky, N., Nyanin, A. S., Orjuela Koop, J. D., Park, B. H., Park, S., Perry, J., Pisani, R. P., Purschke, M. L., Richardson, E., Roche, G., Rosati, M., Rosen, C. A., Sato, T., Savastio, M., Semenov, V., Shigaki, K., Shukla, P., Silva, C. L., Sourikova, I. V., Suire, C., Sumita, T., Tomášek, L., Tomita, Y., Towell, M., Vargyas, M., Velkovska, J., Vértesi, R., Vrba, V., Watanabe, Y., Watanabe, Y. S., Winter, D., Wright, R. M., Xie, W., Yalcin, S., Yamaura, K., Yang, R.
• Format: Article
• Language: English
• Subjects: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; detector; energies; NUCLEAR PHYSICS AND RADIATION PHYSICS; proton; rays
• ISSN: 0556-2813; 1089-490X
• DOI: 10.1103/PhysRevC.91.031901

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. For this study, 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 θ(2×10-6) on U-γ mixing at 90% C.L. for the mass range 30