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    Achasov, M. N.; Amoroso, A.; An, F. F.; Bennett, D. W.; Boger, E.; Boyko, I.; Chen, G.; Chen, H. Y.; Chen, S. J.; Chen, X. R.; Cheng, H. P.; Dai, J. P.; Dedovich, D.; Destefanis, M.; Fang, X.; Fang, Y.; Feldbauer, F.; Fioravanti, E.; Gong, W. X.; Gu, Y. T.; Haddadi, Z.; Han, S.; Hao, X. Q.; Held, T.; Hu, H. M.; Kalantar-Nayestanaki, N.; Kang, X. S.; Kavatsyuk, M.; Kliemt, R.; Kupsc, A.; Lange, J. S.; Li, P. R.; Li, W. D.; Li, X. N.; Li, Z. B.; Liang, Y. T.; Liao, G. R.; Liu, F. H.; Liu, H. B.; Liu, J. B.; Liu, K.; Liu, P. L.; Liu, Q.; Lou, X. C.; Lu, H. J.; Luo, C. L.; Luo, T.; Ma, F. C.; Maas, F. E.; Mao, Z. P.; Marcello, S.; Messchendorp, J. G.; Mo, X. H.; Morales Morales, C.; Ouyang, Q.; Pettersson, J.; Ping, R. G.; Qi, M.; Qin, N.; Rashid, K. H.; Ruan, X. D.; Sarantsev, A.; Shan, W.; Sheng, H. Y.; Song, W. M.; Song, X. Y.; Sun, J. F.; Sun, S. S.; Sun, Z. J.; Sun, Z. T.; Tang, C. J.; Tang, X.; Tiemens, M.; Varner, G. S.; Wang, M.; Wang, W.; Wang, Z. G.; Weber, T.; Weidenkaff, P.; Xia, L. G.; Xiao, D.; Xie, Y. G.; Yang, H. X.; Yang, Y. X.; Yu, B. X.; Yu, J. S.; Zallo, A.; Zhang, C.; Zhang, J. Y.; Zhang, J. Z.; Zhang, L.; Zhao, J. Y.; Zhao, Lei; Zhemchugov, A.; Zhong, B.; Zhu, X. L.; Zhu, Y. C.; Zhu, Z. A.; Zhuang, J.; Zotti, L.

    Physical review. D, Particles, fields, gravitation, and cosmology, 10/2015, Letnik: 92, Številka: 7
    Journal Article

    Using 2.92  fb −1 of electron-positron annihilation data collected at a center-of-mass energy of √s=3.773  GeV with the BESIII detector, we present an improved measurement of the branching fraction B(D + → ωe + ν e )=(1.63±0.11±0.08)×10 −3 . The parameters defining the corresponding hadronic form factor ratios at zero momentum transfer are determined for the first time; we measure them to be r V =1.24±0.09±0.06 and r 2 =1.06±0.15±0.05. The first and second uncertainties are statistical and systematic, respectively. We also search for the decay D + → ϕe + ν e . An improved upper limit B(D + → ϕe + ν e )<1.3×10 −5 is set at 90% confidence level.