\begin{document}$ D^+\to e^+\nu_{e} $\end{document} using an \begin{document}$ e^+e^- $\end{document} collision data sample with an integrated luminosity of 20.3 fb\begin{document}$ ^{-1} $\end{document} collected with the BESIII detector at a center-of-mass energy of 3.773 GeV. Significant signal is not observed, and an upper limit on the branching fraction of \begin{document}$ D^+\to e^+\nu_{e} $\end{document} is set as \begin{document}$ 9.7 \times 10^{-7} $\end{document}, at a confidence level of 90%. Our upper limit is an order of magnitude smaller than the previous limit for this decay mode."> Search for the leptonic decay <inline-formula><tex-math id="M241">\begin{document}${\boldsymbol D^{\bf +}{\bf\to}{\boldsymbol e}^{\bf +}\boldsymbol\nu_{\boldsymbol e}}$\end{document}</tex-math><alternatives><graphic specific-use="online" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="//www.macurncorp.com/hepnp/article/app/id/51ecc4c4-c325-4b6c-8eda-32532c2a4fe8/CPC-2025-0036_M241.jpg"/><graphic specific-use="print" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="//www.macurncorp.com/hepnp/article/app/id/51ecc4c4-c325-4b6c-8eda-32532c2a4fe8/CPC-2025-0036_M241.png"/></alternatives></inline-formula> -
  • [1]

    B. C. Ke, J. Koponen, H. B. Liet al., Ann. Rev. Nucl. Part. Sci.73, 285 (2023), arXiv: 2310.05228[hep-ex]

  • [2]

    D. Silverman and H. Yao, Phys. Rev. D38, 214 (1988)

  • [3]

    B. I. Eisensteinet al., Phys. Rev. D78, 052003 (2008)

  • [4]

    M. Ablikimet al., Chin. Phys. C48, 123001 (2024), arXiv: 2406.05827[hep-ex]

  • [5]

    M. Ablikimet al., Chin. Phys. C37, 123001 (2013), arXiv: 1307.2022[hep-ex]

  • [6]

    M. Ablikimet al., Nucl. Instrum. Meth. A614, 345 (2010)

  • [7]

    C. Yuet al., BEPCⅡ Performance and Beam Dynamics Studies on Luminosity, in7th International Particle Accelerator Conference(2016) p. TUYA01

  • [8]

    M. A.,et al., Chin. Phys. C44, 040001 (2020)

  • [9]

    J. Lu, Y. Xiao, and X. Ji, Radiat. Detect. Technol. Methods4, 337 (2020)

  • [10]

    J. W. Zhang,et al., Radiat. Detect. Technol. Methods6, 289 (2022)

  • [11]

    X. Liet al., Radiat. Detect. Technol. Methods1, 13 (2017)

  • [12]

    Y. X. Guoet al., Radiat. Detect. Technol. Methods1, 15 (2017)

  • [13]

    P. Caoet al., Nucl. Instrum. Meth. A953, 163053 (2020)

  • [14]

    S. Ag ostinelliet al., Nucl. Instrum. Meth. A506, 250 (2003)

  • [15]

    S. Jadach, B. F. L. Ward, and Z. Was, Comput. Phys. Commun.130, 260 (2000)

  • [16]

    S. Jadach, B. F. L. Ward, and Z. Was, Phys. Rev. D63, 113009 (2001)

  • [17]

    D. J. Lange, Nucl. Instrum. Meth. A462, 152 (2001)

  • [18]

    R. G. Ping, Chin. Phys. C32, 599 (2008)

  • [19]

    R. Workmanet al., PTEP2022, 083C (2022)

  • [20]

    J. C. Chen, G. S. Huang, X. R. Qiet al., Phys. Rev. D62, 034003 (2000)

  • [21]

    E. Barberio, B. van Eijk, and Z. Was, Comput. Phys. Commun.66, 115 (1991)

  • [22]

    A. Ryd, D. Lange, and N. Kuznetsova, documentation available at: https://evtgen.hepforge.org/doc

  • [23]

    J. Adleret al., Phys. Rev. Lett.62, 1821 (1989)

  • [24]

    H. Albrechtet al., Phys. Lett. B241, 278 (1990)

  • [25]

    G. Punziet al., Phys. Lett. B10, 48550 (2003)

  • [26]

    W. Verkerke and D. Kirkby, https://root.cern/download/ doc/RooFit_Users_Manual_2.91-33.pdf, (2019)

  • [27]

    K. Stensonet al.,A more exact solution for incorporating multiplicative systematic uncertainties in branching ratio limits, https://doi.org/10.48550/arXiv.physics/0605236

Baidu
map