K. Fischer

collaborators

4 papers

hep-ex2024

Search for di-photon decays of an axion-like particle in radiative $J / I ¨ $ decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +614

We search for the di-photon decay of a light pseudoscalar axion-like particle, $a$ , in radiative $J / I ¨ $ decays, using 10 billion $J / I ¨ $ events collected with the BESIII detector. W…

hep-ex2024

Search for the leptonic decays $D^{+} \to e^{+} I^½_{e}$ and $D^{+} \to I^¼^{+} I^½_{I^} ¼$

BESIII Collaboration, M. Ablikim, M. N. Achasov +572

We present the first search for the leptonic decays $D^{*+} \to e^{+} I^½_{e}$ and $D^{*+} \to I^¼^{+} I^½_{I^} ¼$ by analyzing a data sample of electron-positron collisions recorded with the BESII…

hep-ex2024

Measurement of $e^{+} e^{-} \to I ¨ I^\cdot^{'}$ cross sections at $s =$ 2.000 to 3.080 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +610

The Born cross sections for the process $e^{+} e^{-} \to I ¨ I^\cdot^{'}$ are measured at 22 center-of-mass energies from 2.000 to 3.080 GeV using data collected with the BESIII detect…

hep-ex2024

Search for the Rare Decays $D_{s}^{+} \to h^{+} (h^{0}) e^{+} e^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +628

Using 7.33~fb $^{- 1}$ of $e^{+} e^{-}$ collision data collected by the BESIII detector at center-of-mass energies in the range of $s = 4.128 - 4.226$ ~GeV, we search for the rare…

Search for di-photon decays of an axion-like particle in radiative J/I¨ decays

Search for the leptonic decays D∗+→e+I^½e​ and D∗+→I^¼+I^½I^​¼

Measurement of e+e−→I¨I^⋅′ cross sections at s​= 2.000 to 3.080 GeV

Search for the Rare Decays Ds+​→h+(h0)e+e−

Search for di-photon decays of an axion-like particle in radiative $J / I ¨ $ decays

Search for the leptonic decays $D^{+} \to e^{+} I^½_{e}$ and $D^{+} \to I^¼^{+} I^½_{I^} ¼$

Measurement of $e^{+} e^{-} \to I ¨ I^\cdot^{'}$ cross sections at $s =$ 2.000 to 3.080 GeV

Search for the Rare Decays $D_{s}^{+} \to h^{+} (h^{0}) e^{+} e^{-}$