A. Kupsc

activity

20072026

most citedMeasurement of eta meson decays into lepton-antilepton pairs

43 citations · 70 across the 15 of their papers we have counts for

collaborators

16 papers

hep-ex2026

First Measurement of the Absolute Branching Fraction of $η_{c} \to γ γ$

BESIII Collaboration, M. Ablikim, M. N. Achasov +691

We apply a tag-and-probe method to precisely measure the absolute branching fraction of the decay $η_{c} \to γ γ$ with the BESIII experiment at BEPCII. Starting with a large initial s…

hep-ex2026

Search for sub-GeV dark particles in $η \to π^{0} + invisible$ decay

BESIII Collaboration, M. Ablikim, M. N. Achasov +685

Using (10087 $\pm$ 44) $\times$ 10 $^{6}$ $J / ψ$ events collected with the BESIII detector at the BEPCII collider at the center-of-mass energy of $s = 3.097 GeV$ , we report the…

hep-ex2025

First measurement of the cross sections for $e^{+} e^{-} \to K^{0} K^{-} π^{+} J / ψ + c . c .$ at $s$ from 4.396 to 4.951 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +701

Using $e^{+} e^{-}$ collision data at 19 center-of-mass energies ranging from $4.396$ to $4.951 GeV$ corresponding to a total integrated luminosity of $8.86 fb^{- 1}$ coll…

hep-ex2025

Helicity amplitude and branching fraction measurement of $χ_{c J} \to Λ Λ ˉ$

BESIII Collaboration, M. Ablikim, M. N. Achasov +689

Utilizing $2712.4 \pm 14.3$ million $ψ (3686)$ events accumulated by the BESIII experiment, we perform a partial wave analysis of $ψ (3686) \to γ χ_{c J} \to γ Λ Λ ˉ$ decay…

hep-ex2025

Measurements of branching fractions of $D^{0} \to K^{-} 3 π^{+} 2 π^{-}$ , $D^{0} \to K^{-} 2 π^{+} π^{-} 2 π^{0}$ and $D^{+} \to K^{-} 3 π^{+} π^{-} π^{0}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +687

Utilizing $7.9 f b^{- 1}$ of $e^{+} e^{-}$ collision data taken with the BESIII detector at the center-of-mass energy of 3.773 GeV, we report the measurements of absolute branching f…

hep-ex2025

Measurement of the branching fractions of doubly Cabibbo-suppressed $D$ decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +653

By analyzing $e^{+} e^{-}$ collision data collected at the center-of-mass energy of 3.773~GeV with the BESIII detector, corresponding to an integrated luminosity of 20.3~fb $^{- 1}$ , we m…

First Measurement of the Absolute Branching Fraction of ηc​→γγ

Search for sub-GeV dark particles in η→π0+invisible decay

First measurement of the cross sections for e+e−→K0K−π+J/ψ+c.c. at s​ from 4.396 to 4.951 GeV

Helicity amplitude and branching fraction measurement of χcJ​→ΛΛˉ

Measurements of branching fractions of D0→K−3π+2π−, D0→K−2π+π−2π0 and D+→K−3π+π−π0

Measurement of the branching fractions of doubly Cabibbo-suppressed D decays

First Measurement of the Absolute Branching Fraction of $η_{c} \to γ γ$

Search for sub-GeV dark particles in $η \to π^{0} + invisible$ decay

First measurement of the cross sections for $e^{+} e^{-} \to K^{0} K^{-} π^{+} J / ψ + c . c .$ at $s$ from 4.396 to 4.951 GeV

Helicity amplitude and branching fraction measurement of $χ_{c J} \to Λ Λ ˉ$

Measurements of branching fractions of $D^{0} \to K^{-} 3 π^{+} 2 π^{-}$ , $D^{0} \to K^{-} 2 π^{+} π^{-} 2 π^{0}$ and $D^{+} \to K^{-} 3 π^{+} π^{-} π^{0}$

Measurement of the branching fractions of doubly Cabibbo-suppressed $D$ decays