F. Hanisch

collaborators

5 papers

hep-ex2025

Study of the electromagnetic Dalitz decay $J / I ¨ \to e^{+} e^{-} I ¨ ^{0}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +640

We report the first measurement of the di-electron invariant mass dependent transition form factor in the electromagnetic Dalitz decay $J / I ¨ \to e^{+} e^{-} I ¨ ^{0}$ using $(10087 \pm 44) \…

hep-ex2025

Measurement of Born cross section of $e^{+} e^{-} \to I^£^{0} I^ˉ £^{0}$ at $s = 3.50 - 4.95$ GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +654

Using $e^{+} e^{-}$ collision data collected with the BESIII detector at the BEPCII collider at thirty-two center-of-mass energies from 3.50 to 4.95 GeV, corresponding to an integrated…

hep-ex2024

Search for the double Dalitz decays $I^\cdot / I^\cdot^{'} \to e^{+} e^{-} I^¼^{+} I^¼^{-}$ and $I^\cdot^{'} \to I^¼^{+} I^¼^{-} I^¼^{+} I^¼^{-}$

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

Using a data sample of $(10087 \pm 44) \times 1 0^{6}$ $J / I ¨ $ events collected with the BESIII detector, we search for the decays $I^\cdot / I^\cdot^{'} \to e^{+} e^{-} I^¼^{+} I^¼^{-}$ and $Î·' \to Î¼^+Î¼^-Î…

hep-ex2024

Observation of $I ¨ _{c J} \to p p ˉ K_{S}^{0} K^{-} I ¨ ^{+} + c . c .$

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

By analyzing $(27.12 \pm 0.14) \times 1 0^{8}$ $I ¨ (3686)$ events collected with the BESIII detector operating at the BEPCII collider, the decays of $Ï_{cJ} \to p \bar{p} K^0_S K^- Ï^+ +…

hep-ex2024

Search for the massless dark photon with $D^0\toÏÎ³'$ and $D^0\toÎ³Î³'$

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

Using $7.9 f b^{- 1}$ of $e^{+} e^{-}$ collision data collected at $s = 3.773$ GeV with the BESIII detector at the BEPCII collider, we search for the massless dark photon with t…

Study of the electromagnetic Dalitz decay J/I¨→e+e−I¨0

Measurement of Born cross section of e+e−→I^£0I^ˉ£0 at s​=3.50−4.95 GeV

Search for the double Dalitz decays I^⋅/I^⋅′→e+e−I^¼+I^¼− and I^⋅′→I^¼+I^¼−I^¼+I^¼−

Observation of I¨cJ​→ppˉ​KS0​K−I¨++c.c.

Search for the massless dark photon with $D^0\toÏÎ³'$ and $D^0\toÎ³Î³'$

Study of the electromagnetic Dalitz decay $J / I ¨ \to e^{+} e^{-} I ¨ ^{0}$

Measurement of Born cross section of $e^{+} e^{-} \to I^£^{0} I^ˉ £^{0}$ at $s = 3.50 - 4.95$ GeV

Search for the double Dalitz decays $I^\cdot / I^\cdot^{'} \to e^{+} e^{-} I^¼^{+} I^¼^{-}$ and $I^\cdot^{'} \to I^¼^{+} I^¼^{-} I^¼^{+} I^¼^{-}$

Observation of $I ¨ _{c J} \to p p ˉ K_{S}^{0} K^{-} I ¨ ^{+} + c . c .$

Search for the massless dark photon with $D^0\toÏÎ³'$ and $D^0\toÎ³Î³'$