Won, E.Adachi, I.Aihara, H.Al Said, S.Asner, D. M.Aushev, T.Ayad, R.Badhrees, I.Bakich, A. M.Bansal, V.Barberio, E.Behera, P.Bhuyan, B.Biswal, J.Bobrov, A.Bozek, A.Bracko, M.Cervenkov, D.Chekelian, V.Chen, A.Cheon, B. G.Chilikin, K.Chistov, R.Cho, K.Chobanova, V.Choi, Y.Cinabro, D.Dash, N.Di Carlo, S.Dolezal, Z.Drsal, Z.Dutta, D.Eidelman, S.Epifanov, D.Farhat, H.Fast, J. E.Ferber, T.Fulsom, B. G.Gaur, V.Gabyshev, N.Garmash, A.Gillard, R.Goldenzweig, P.Greenwald, D.Haba, J.Hayasaka, K.Hayashii, H.Hou, W. -S.Iijima, T.Inami, K.Inguglia, G.Ishikawa, A.Itoh, R.Iwasaki, Y.Jaegle, I.Jeon, H. B.Joffe, D.Joo, K. K.Julius, T.Kang, K. H.Kawasaki, T.Kim, D. Y.Kim, J. B.Kim, K. T.Kim, M. J.Kim, S. H.Kim, Y. J.Kinoshita, K.Kodys, P.Krizan, P.Krokovny, P.Kuhr, T.Kulasiri, R.Kwon, Y. -J.Lange, J. S.Lee, I. S.Li, C. H.Li, L.Li, Y.Gioi, L. LiLibby, J.Liventsev, D.Luo, T.Masuda, M.Matsuda, T.Matvienko, D.Miyabayashi, K.Miyata, H.Mizuk, R.Mohanty, G. B.Nakano, E.Nakao, M.Nakazawa, H.Nanut, T.Nath, K. J.Natkaniec, Z.Nayak, M.Nishida, S.Ogawa, S.Okuno, S.Pakhlov, P.Pal, B.Park, C. -S.Paul, S.Pedlar, T. K.Piilonen, L. E.Pulvermacher, C.Rauch, J.Ritter, M.Sahoo, H.Sakai, Y.Sandilya, S.Santelj, L.Sanuki, T.Sato, Y.Savinov, V.Schluter, T.Schneider, O.Schnell, G.Schwanda, C.Seino, Y.Semmler, D.Senyo, K.Seon, O.Seong, I. S.Shebalin, V.Shen, C. P.Shibata, T. -A.Shiu, J. -G.Simon, F.Staric, M.Sumiyoshi, T.Takizawa, M.Tamponi, U.Tenchini, F.Trabelsi, K.Uchida, M.Uehara, S.Uglov, T.Unno, Y.Uno, S.Urquijo, P.Usov, Y.Van Hulse, C.Varner, G.Varvell, K. E.Vorobyev, V.Wang, C. H.Wang, M. -Z.Watanabe, M.Watanabe, Y.Widmann, E.Yamaoka, J.Ye, H.Yook, Y.Yuan, C. Z.Yusa, Y.Zhang, Z. P.Zhilich, V.Zhukova, V.Zhulanov, V.Zupanc, A.2017-01-242017-01-242017-01-24201610.1103/PhysRevD.94.092006https://infoscience.epfl.ch/handle/20.500.14299/133618WOS:000388823900002We report a search for a dark vector gauge boson U' that couples to quarks in the decay chain D*(+) -> D-0 pi(+), D-0 -> K-S(0) eta, eta -> U'gamma, U' -> pi(+)pi- No signal is found and we set a mass-dependent limit on the baryonic fine structure constant of 10(-3)-10(-2) in the U' mass range of 290 to 520 MeV/c(2). This analysis is based on a data sample of 976 fb(-1) collected by the Belle experiment at the KEKB asymmetric-energy e(+)e(-) collider.text::journal::journal article::research article