More Like this

1. Search for a ${\tau }^{+}{\tau }^{-}$ Resonance in $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}{\tau }^{+}{\tau }^{-}$ Events with the Belle II Experiment

   https://doi.org/10.1103/PhysRevLett.131.121802  

   Adachi, I; Adamczyk, K; Aggarwal, L; Ahmed, H; Aihara, H; Akopov, N; Aloisio, A; Anh_Ky, N; Asner, D M; Atmacan, H; et al (September 2023, Physical Review Letters)
2. Search for $B^0\to {\tau }^{\pm }{\ell }^{\mp }$ ( $\ell =e$ , $\mu$ ) with a hadronic tagging method at Belle

   https://doi.org/10.1103/PhysRevD.104.L091105  

   Atmacan, H.; Schwartz, A. J.; Kinoshita, K.; Adachi, I.; Adamczyk, K.; Aihara, H.; Al Said, S.; Asner, D. M.; Aulchenko, V.; Aushev, T.; et al (November 2021, Physical Review D)
3. Search for the Lepton Flavor Violating Decays $B^{+}\to K^{+}{\tau }^{\pm }{\ell }^{\mp }$ ( $\ell =e$ , $\mu$ ) at Belle

   https://doi.org/10.1103/PhysRevLett.130.261802  

   Watanuki, S.; de Marino, G.; Trabelsi, K.; Adachi, I.; Aihara, H.; Asner, D. M.; Atmacan, H.; Aulchenko, V.; Aushev, T.; Ayad, R.; et al (June 2023, Physical Review Letters)
4. Search for $D^0$ meson decays to ${\pi }^{+}{\pi }^{-}{e}^{+}{e}^{-}$ and $K^{+}{K}^{-}{e}^{+}{e}^{-}$ final states

   https://doi.org/10.1103/PhysRevD.111.L091101  

   Aaij, R; Abdelmotteleb, A_S W; Abellan_Beteta, C; Abudinén, F; Ackernley, T; Adefisoye, A A; Adeva, B; Adinolfi, M; Adlarson, P; Agapopoulou, C; et al (May 2025, Physical Review D)

   A search for $D^0$meson decays to the ${\pi }^{+}{\pi }^{-}{e}^{+}{e}^{-}$and $K^{+}{K}^{-}{e}^{+}{e}^{-}$final states is reported using a sample of proton-proton collisions collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of $6{\mathrm{fb}}^{-1}$. The decay $D^0\to {\pi }^{+}{\pi }^{-}{e}^{+}{e}^{-}$is observed for the first time when requiring that the two electrons are consistent with coming from the decay of a $\varphi$or ${\rho }^0/\omega$meson. The corresponding branching fractions are measured relative to the $D^0\to K^{-}{\pi }^{-}[e^{+}{e}^{-}{]}_{{\rho }^0/\omega }$decay, where the two electrons are consistent with coming from the decay of a ${\rho }^0$or $\omega$meson. No evidence is found for the $D^0\to K^{+}{K}^{-}{e}^{+}{e}^{-}$decay and world-best limits are set on its branching fraction. The results are compared to, and found to be consistent with, the branching fractions of the $D^0\to {\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$and $D^0\to K^{+}{K}^{-}{\mu }^{+}{\mu }^{-}$decays recently measured by LHCb and confirm lepton universality at the current precision. © 2025 CERN, for the LHCb Collaboration2025CERN 

   more » « less
5. Observation of ${\tau }^{-}\to {\pi }^{-}{\nu }_{\tau }{e}^{+}{e}^{-}$ and search for ${\tau }^{-}\to {\pi }^{-}{\nu }_{\tau }{\mu }^{+}{\mu }^{-}$

   https://doi.org/10.1103/PhysRevD.100.071101  

   Jin, Y.; Aihara, H.; Epifanov, D.; Adachi, I.; Al Said, S.; Asner, D. M.; Aulchenko, V.; Aushev, T.; Ayad, R.; Babu, V.; et al (October 2019, Physical Review D)