Search for lepton-flavor-violating decays <i>D</i><SUP>0</SUP> → <i>X</i><SUP>0</SUP><i>e</i><SUP>±</SUP>μ<SUP>∓</SUP>

Lees, JP, Poireau, V, Tisserand, V, Grauges, E, Palano, A, Eigen, G, Brown, DN, Kolomensky, Yu G, Fritsch, M, Koch, H
et al (show 230 more authors) (2020) Search for lepton-flavor-violating decays <i>D</i><SUP>0</SUP> → <i>X</i><SUP>0</SUP><i>e</i><SUP>±</SUP>μ<SUP>∓</SUP>. PHYSICAL REVIEW D, 101 (11). 112003-.

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We present a search for seven lepton-flavor-violating neutral charm decays of the type $D^{0}\rightarrow X^{0} e^{\pm} \mu^{\mp}$, where $X^{0}$ represents a $\pi^{0}$, $K^{0}_{\rm S}$, $\bar{K^{*0}}$, $\rho^{0}$, $\phi$, $\omega$, or $\eta$ meson. The analysis is based on $468$ fb$^{-1}$ of $e^+e^-$ annihilation data collected at or close to the $\Upsilon(4S)$ resonance with the BaBar detector at the SLAC National Accelerator Laboratory. No significant signals are observed, and we establish 90\% confidence level upper limits on the branching fractions in the range $(5.0 - 22.5)\times 10^{-7}$. The limits are between one and two orders of magnitude more stringent than previous measurements.

Item Type: Article
Additional Information: 12 pages, 2 figures, to be submitted to Physical Review D. arXiv admin note: text overlap with arXiv:1905.00608
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 03 Jul 2020 08:55
Last Modified: 14 Oct 2023 22:29
DOI: 10.1103/PhysRevD.101.112003
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