Year: 2019
Type: article
Abstract: Using a data sample corresponding to an integrated luminosity of $2.93\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ recorded by the BESIII detector at a center-of-mass energy of 3.773 GeV, we present an analysis of the decays ${D}^{0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}{e}^{+}{\ensuremath{\nu}}_{e}$ and ${D}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{e}^{+}{\ensuremath{\nu}}_{e}$. By performing a partial wave analysis, the ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ $S$-wave contribution to ${D}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{e}^{+}{\ensuremath{\nu}}_{e}$ is observed to be $(25.7\ifmmode\pm\else\textpm\fi{}1.6\ifmmode\pm\else\textpm\fi{}1.1)%$ with a statistical significance greater than $10\ensuremath{\sigma}$, besides the dominant $P$-wave contribution. This is the first observation of the $S$-wave contribution. We measure the branching fractions $\mathcal{B}({D}^{0}\ensuremath{\rightarrow}{\ensuremath{\rho}}^{\ensuremath{-}}{e}^{+}{\ensuremath{\nu}}_{e})=(1.445\ifmmode\pm\else\textpm\fi{}0.058\ifmmode\pm\else\textpm\fi{}0.039)\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}3}$, $\mathcal{B}({D}^{+}\ensuremath{\rightarrow}{\ensuremath{\rho}}^{0}{e}^{+}{\ensuremath{\nu}}_{e})=\phantom{\rule{0ex}{0ex}}(1.860\ifmmode\pm\else\textpm\fi{}0.070\ifmmode\pm\else\textpm\fi{}0.061)\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}3}$, and $\mathcal{B}\mathbf{(}{D}^{+}\ensuremath{\rightarrow}{f}_{0}(500){e}^{+}{\ensuremath{\nu}}_{e},{f}_{0}(500)\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}\mathbf{)}=(6.30\ifmmode\pm\else\textpm\fi{}0.43\ifmmode\pm\else\textpm\fi{}0.32)\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}4}$. An upper limit of $\mathcal{B}\mathbf{(}{D}^{+}\ensuremath{\rightarrow}{f}_{0}(980){e}^{+}{\ensuremath{\nu}}_{e},{f}_{0}(980)\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}\mathbf{)}<2.8\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}5}$ is set at the 90% confidence level. We also obtain the hadronic form factor ratios of $D\ensuremath{\rightarrow}\ensuremath{\rho}{e}^{+}{\ensuremath{\nu}}_{e}$ at ${q}^{2}=0$ assuming the single-pole dominance parametrization: ${r}_{V}={[V(0)]/[{A}_{1}(0)]}=1.695\ifmmode\pm\else\textpm\fi{}0.083\ifmmode\pm\else\textpm\fi{}0.051$, ${r}_{2}={[{A}_{2}(0)]/[{A}_{1}(0)]}=\phantom{\rule{0ex}{0ex}}0.845\ifmmode\pm\else\textpm\fi{}0.056\ifmmode\pm\else\textpm\fi{}0.039$.
Source: Physical Review Letters
Authors: M. Ablikim, M. N. Achasov, S. Ahmed, M. Albrecht, M. Alekseev, A. Amoroso, F. F. An, Q. An, Y. Bai, O. Bakina, R. Baldini Ferroli, Y. Ban, K. Begzsuren, D. W. Bennett, J. V. Bennett, N. Berger, M. Bertani, D. Bettoni, F. Bianchi, E. Boger, I. Boyko, R. A. Briere, H. Cai, X. Cai, A. Calcaterra, G. F. Cao, S. A. Cetin, J. Chai, J. F. Chang, W. L. Chang, G. Chelkov, G. Chen, H. S. Chen, J. C. Chen, M. L. Chen, P. L. Chen, S. J. Chen, X. R. Chen, Y. B. Chen, W. Cheng, X. K. Chu, G. Cibinetto, F. Cossio, H. L. Dai, J. P. Dai, A. Dbeyssi, D. Dedovich, Z. Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, C. Dong, J. Dong, L. Y. Dong, M. Y. Dong, Z. L. Dou, S. X. Du, P. F. Duan, J. Fang, S. S. Fang, Y. Fang, R. Farinelli, L. Fava, S. Fegan, F. Feldbauer, G. Felici, C. Q. Feng, E. Fioravanti, M. Fritsch, C. D. Fu, Q. Gao, X. L. Gao, Y. Gao, Y. G. Gao, Z. Gao, B. Garillon, I. Garzia, A. Gilman, K. Goetzen, L. Gong, W. X. Gong, W. Gradl, M. Greco, L. M. Gu, M. H. Gu, Y. T. Gu, A. Q. Guo, L. B. Guo, R. P. Guo, Y. P. Guo, A. Guskov, Z. Haddadi, S. Han, X. Q. Hao, F. A. Harris, K. L. He, X. Q. He, F. H. Heinsius, T. Held, Y. K. Heng, Z. L. Hou, H. M. Hu, J. F. Hu, T. Hu, Y. Hu, G. S. Huang, J. S. Huang, X. T. Huang, X. Z. Huang, Z. L. Huang, T. Hussain, W. Ikegami Andersson, M. Irshad, Q. Ji, Q. P. Ji, X. B. Ji, X. L. Ji, H. L. Jiang, X. S. Jiang, X. Y. Jiang, J. B. Jiao, Z. Jiao, D. P. Jin, S. Jin, Y. Jin, T. Johansson, A. Julin, N. Kalantar-Nayestanaki, X. S. Kang, M. Kavatsyuk, B. C. Ke, I. K. Keshk, T. Khan, A. Khoukaz, P. Kiese, R. Kiuchi, R. Kliemt, L. Koch, O. B. Kolcu, B. Kopf, M. Kornicer, M. Kuemmel, M. Kuessner, A. Kupsc, M. Kurth, W. Kühn, J. S. Lange, P. Larin, L. Lavezzi, S. Leiber, H. Leithoff, C. Li, Cheng Li, D. M. Li, F. Li, F. Y. Li, G. Li, H. B. Li, H. J. Li, J. C. Li, J. W. Li, K. J. Li, Kang Li, Ke Li, Lei Li, P. L. Li, P. R. Li, Q. Y. Li, T. Li, W. D. Li, W. G. Li, X. L. Li, X. N. Li, X. Q. Li, Z. B. Li, H. Liang, Y. F. Liang, Y. T. Liang, G. R. Liao, L. Z. Liao, J. Libby, C. X. Lin, D. X. Lin, B. Liu, B. J. Liu, C. X. Liu, D. Liu, D. Y. Liu, F. H. Liu, Fang Liu, Feng Liu, H. B. Liu, H. L. Liu, H. M. Liu, Huanhuan Liu, Huihui Liu, J. B. Liu, J. Y. Liu, K. Y. Liu, Ke Liu, L. D. Liu, Q. Liu, S. B. Liu, X. Liu, Y. B. Liu, Z. A. Liu, Zhiqing Liu, Y. F. Long, X. C. Lou, H. J. Lu, J. G. Lu, Y. Lu, Y. P. Lu, C. L. Luo, M. X. Luo, T. Luo, X. L. Luo, S. Lusso, X. R. Lyu, F. C. Ma, H. L. Ma, L. L. Ma, M. M. Ma, Q. M. Ma, X. N. Ma, X. Y. Ma, Y. M. Ma, F. E. Maas, M. Maggiora, S. Maldaner, Q. A. Malik, A. Mangoni, Y. J. Mao, Z. P. Mao, S. Marcello, Z. X. Meng, J. G. Messchendorp, G. Mezzadri, J. Min, T. J. Min, R. E. Mitchell, X. H. Mo, Y. J. Mo, C. Morales Morales, N. Yu. Muchnoi, H. Muramatsu, A. Mustafa, S. Nakhoul, Y. Nefedov, F. Nerling, I. B. Nikolaev, Z. Ning, S. Nisar, S. L. Niu, X. Y. Niu, S. L. Olsen, Q. Ouyang, S. Pacetti, Y. Pan, M. Papenbrock, P. Patteri, M. Pelizaeus, J. Pellegrino, H. P. Peng, Z. 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Zhou, X. K. Zhou, X. R. Zhou, X. Y. Zhou, Xiaoyu Zhou, Xu Zhou, A. N. Zhu, J. Zhu, J. Zhu, K. Zhu, K. J. Zhu, S. Zhu, S. H. Zhu, X. L. Zhu, Y. C. Zhu, Y. S. Zhu, Z. A. Zhu, J. Zhuang, B. S. Zou, J. H. Zou
Institutions: Institute of High Energy Physics, Siberian Branch of the Russian Academy of Sciences, Budker Institute of Nuclear Physics, Helmholtz Institute Mainz, Ruhr University Bochum, Istituto Nazionale di Fisica Nucleare, Sezione di Torino, University of Turin, University of Science and Technology of China, Southeast University, Joint Institute for Nuclear Research, Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, Peking University, Institute of Physics and Technology, Indiana University Bloomington, Indiana University, Carnegie Mellon University, Johannes Gutenberg University Mainz, Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara, Wuhan University, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Istanbul Bilgi University, University of South China, Nanjing University, Lanzhou University, Shanghai Jiao Tong University, Liaoning University, Nankai University, Zhengzhou University, University of Ferrara, Università degli Studi del Piemonte Orientale “Amedeo Avogadro”, Central China Normal University, Tsinghua University, University of Minnesota, GSI Helmholtz Centre for Heavy Ion Research, Guangxi University, Nanjing Normal University, University of Groningen, Henan Normal University, University of Hawaiʻi at Mānoa, University of Hawaii System, University of Science and Technology Liaoning, Shandong University, University of the Punjab, Uppsala University, Huangshan University, University of Jinan, University of Münster, Justus-Liebig-Universität Gießen, Soochow University, Sun Yat-sen University, Hangzhou Normal University, Beijing Institute of Petrochemical Technology, China Center of Advanced Science and Technology, Sichuan University, Guangxi Normal University, Indian Institute of Technology Madras, Shanxi University, Henan University of Science and Technology, Zhejiang University, Fudan University, Istituto Nazionale di Fisica Nucleare, University of Perugia, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, COMSATS University Islamabad, Lahore Campus, Beihang University, Hunan Normal University, Near East University, Hunan University, Xinyang Normal University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,750
Funders: U.S. Department of Energy, Strong, National Research Foundation, Deutsche Forschungsgemeinschaft, Rijksuniversiteit Groningen, Koninklijke Nederlandse Akademie van Wetenschappen, National Natural Science Foundation of China, Chinese Academy of Sciences, National Research Foundation of Korea, Vetenskapsrådet, Istituto Nazionale di Fisica Nucleare, CAS Center for Excellence in Particle Physics, Shanghai Key Laboratory for Particle Physics and Cosmology, Instituto Nazionale di Fisica Nucleare, Institute of High Energy Physics
Awards: G1272654690, EXPERIMENTAL RESEARCH AT THE INTENSITY FRONTIER IN HIGH ENERGY PHYSICS, G1612394202, G1652990914, G1732074323, G1857410302, G222768804, G2351810572, G245929358, G251892408, G3057911798, G3153357558, RESEARCH IN HIGH ENERGY PHYSICS, G3273050174, G40748299, UNDERSTANDING QCD IN THE LIGHT MESON SECTOR (WITH EMPHASIS ON MAPPING GLUONIC EXCITATIONS)..., G5402569047, EXPERIMENTAL INVESTIGATIONS OF HADRON SPECTROSCOPY AT ACCELERATOR FACILITIES, G568990336, G5951996050, 北京谱仪III上Ds衰变的实验研究, RESEARCH IN EXPERIMENTAL AND THEORETICAL HIGH ENERGY PHYSICS, G711355526, G7113737004, G7528314403, G7583682821, G772929444, G7797782958, G7924189137, G8292866527, G868043634, UNDERSTANDING QCD IN THE LIGHT MESON SECTOR (WITH EXPHASIS ON MAPPING GLUONIC EXCITATIONS) USING PION AND PHOTON PROBES, G8981979363
OpenAlex ID: W2953053643