R. Kumar

activity

20242026

most citedSearch for the lepton-flavor-violating

I ¨ ^{-} \to e^{\mp} ℓ^{\pm} ℓ^{\mp}

decays at Belle II

1 citations · 1 across the 5 of their papers we have counts for

collaborators

Showing 2025Show all

24 papers · 1 filter

hep-ex2025★ 4 cited

Search for a Dark Higgs Boson Produced in Association with Inelastic Dark Matter at the Belle II Experiment

Belle II Collaboration, I. Adachi, L. Aggarwal +437

Inelastic dark matter models that have two dark matter particles and a massive dark photon can reproduce the observed relic dark matter density without violating cosmological limit…

hep-ex2025

Measurement of the $D^{0} \to K^{-} I ¨ ^{+} e^{+} e^{-}$ branching fraction and search for $D^{0} \to I ¨ ^{+} I ¨ ^{-} e^{+} e^{-}$ and $D^{0} \to K^{+} K^{-} e^{+} e^{-}$ decays at Belle

Belle, Belle II Collaborations, : +481

We present a study of the rare charm meson decays $D^{0} \to K^{+} K^{-} e^{+} e^{-}$ , $I ¨ ^{+} I ¨ ^{-} e^{+} e^{-}$ , and $K^{-} I ¨ ^{+} e^{+} e^{-}$ using a 942 fb $^{- 1}$ data se…

hep-ex2025

Search for an Axion-Like Particle in $B \to K^{(*)} a (\to I^^{3} I^^{3})$ Decays at Belle

Belle, Belle II Collaborations, : +422

We report a search for an axion-like particle $a$ in $B \to K^{(*)} a (\to I^^{3} I^^{3})$ decays using data collected with the Belle detector at the KEKB asymmetric energy el…

hep-ex2025

Measurement of the $I^_{c}^{+}$ lifetime

An absolute measurement of the $I^_{c}^{+}$ lifetime is reported using $I^_{c}^{+} \to p K^{-} I ¨ ^{+}$ decays in events reconstructed from data collected by the Belle II experiment at t…

hep-ex2025

Search for lepton flavor-violating decay modes $B^{0} \to K^{* 0} I ¨ ^{\pm} ℓ^{\mp}$ ( $ℓ = e, I^¼$ ) with hadronic B-tagging at Belle and Belle II

Belle, Belle II Collaborations, : +375

We present the results of a search for the charged-lepton-flavor violating decays $B^{0} \to K^{* 0} I ¨ ^{\pm} ℓ^{\mp}$ , where $ℓ^{\mp}$ is either an electron or a muon. The…

physics.ins-det2025

Radiation damage study of Belle II silicon strip sensors with 90 MeV electron irradiation

K. Adamczyk, H. Aihara, K. Amos +58

The silicon strip sensors of the Belle II silicon vertex detector were irradiated with 90 MeV electron beams up to an equivalent 1-MeV-neutron fluence of $3.0\times 10^{13}~{\rm n}…

Search for a Dark Higgs Boson Produced in Association with Inelastic Dark Matter at the Belle II Experiment

Measurement of the D0→K−I¨+e+e− branching fraction and search for D0→I¨+I¨−e+e− and D0→K+K−e+e− decays at Belle

Search for an Axion-Like Particle in B→K(∗)a(→I^3I^3) Decays at Belle

Measurement of the I^c+​ lifetime

Search for lepton flavor-violating decay modes B0→K∗0I¨±ℓ∓ (ℓ=e,I^¼) with hadronic B-tagging at Belle and Belle II

Radiation damage study of Belle II silicon strip sensors with 90 MeV electron irradiation

Measurement of the $D^{0} \to K^{-} I ¨ ^{+} e^{+} e^{-}$ branching fraction and search for $D^{0} \to I ¨ ^{+} I ¨ ^{-} e^{+} e^{-}$ and $D^{0} \to K^{+} K^{-} e^{+} e^{-}$ decays at Belle

Search for an Axion-Like Particle in $B \to K^{(*)} a (\to I^^{3} I^^{3})$ Decays at Belle

Measurement of the $I^_{c}^{+}$ lifetime

Search for lepton flavor-violating decay modes $B^{0} \to K^{* 0} I ¨ ^{\pm} ℓ^{\mp}$ ( $ℓ = e, I^¼$ ) with hadronic B-tagging at Belle and Belle II