Search for the radiative leptonic decay $D^{+}\to \gamma e^{+}{\nu }_e$ using Deep Learning

Abstract

Using 20.3$\mathrm{f}{\mathrm{b}}^{-1}$ of $e^{+}{e}^{-}$ annihilation data collected at a center-of-mass energy of 3.773$\mathrm{GeV}$ with the BESIII detector, we report an improved search for the radiative leptonic decay $D^{+}\to \gamma e^{+}{\nu }_e$. An upper limit on its partial branching fraction for photon energies $E_{\gamma }>10\mathrm{MeV}$ was determined to be $1.2\times 10^{-5}$ at 90\% confidence level; this excludes most current theoretical predictions. A sophisticated deep learning approach, which includes thorough validation and is based on the Transformer architecture, was implemented to efficiently distinguish the signal from massive backgrounds.

arXiv comment16 pages, 6 figures

References in corpus (22)

• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Future Physics Programme of BESIII
• ParticleNet: Jet Tagging via Particle Clouds
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Radiative leptonic decays of B mesons in QCD
• Precision Measurement of B(D+ -> mu+ nu) and the Pseudoscalar Decay Constant fD+
• Thinking outside the ROCs: Designing Decorrelated Taggers (DDT) for jet substructure
• DisCo Fever: Robust Networks Through Distance Correlation
• Machine Learning Uncertainties with Adversarial Neural Networks
• First lattice calculation of radiative leptonic decay rates of pseudoscalar mesons
• Precision measurements of $B(D^{+}\to {\mu }^{+}{\nu }_{\mu })$, the pseudoscalar decay constant $f_{D^{+}}$, and the quark mixing matrix element $|V_{\mathrm{cd}}|$
• Combined estimation for multi-measurements of branching ratio
• Observation of the leptonic decay $D^{+}\to {\tau }^{+}{\nu }_{\tau }$
• Study of Radiative Leptonic D Meson Decays
• Measurement of the integrated luminosity of the data collected at 3.773 GeV by BESIII from 2021 to 2024
• Radiative Leptonic Decays of D_s^\pm and D^\pm Mesons
• Visualization for physics analysis improvement and applications in BESIII
• Search for the Radiative Leptonic Decay $D^{+}\to \gamma e^{+}{\nu }_e$
• Factorization of Radiative Leptonic Decays of $B^{-}$ and $D^{-}$ Mesons
• Factorization of Radiative Leptonic Decays of $B^{-}$ and $D^{-}$ Mesons Including the Soft Photon Region