M. Lellmann

activity

20242026

collaborators

97 papers

hep-ex2026

Search for the charged lepton flavour violating decay $η^{'} \to e μ$

BESIII Collaboration, M. Ablikim, M. N. Achasov +765

Based on $(8998 \pm 40) \times 1 0^{6}$ $J / ψ$ events collected in $e^{+} e^{-}$ collisions at $s = 3.097$ GeV with the BESIII detector, we present a search for the charged lepton flavou…

hep-ex2026

Proof of principle for nucleon polarization measurement at BESIII

BESIII Collaboration, M. Ablikim, M. N. Achasov +754

A novel technique for measuring the spin polarization of final-state nucleons in a general-purpose spectrometer is validated. Using $10.09 \times 1 0^{9}$ $J / I ¨ $ events at BESIII, the…

hep-ex2026

Study of the $e^{+} e^{-} \to I ¨ ^{+} I ¨ ^{-} D_{s}^{+} D_{s}^{-}$ process from $s$ = 4.42 to 4.95 GeV at BESIII

BESIII Collaboration, M. Ablikim, M. N. Achasov +782

Based on $8.5 fb^{- 1}$ of $e^{+} e^{-}$ collision data collected at center-of-mass energies between 4.42 and 4.95 GeV with the BESIII detector at the BEPCII storage ring, we inves…

hep-ex2026

Precise Measurement of Chromoelectric Dipole Moment of the Charm Quark

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

The combined symmetry of charge conjugation and parity ( $C P$ ) is tested in the hadronic transition $I ¨ (3686) \to I ¨ ^{+} I ¨ ^{-} J / I ¨ $ , using a dataset of $(2712.4 \pm 14.3) \times 1 0^{6}$ $Ï…

hep-ex2026

First measurement of $I^£^{+} n \to I^ p$ and $I^£^{+} n \to I^£^{0} p$ cross sections via $I^£^{+}$ -nucleus scattering at an electron-positron collider

BESIII Collaboration, M. Ablikim, M. N. Achasov +678

Using $(1.0087 \pm 0.0044) \times 1 0^{10}$ $J / I ¨ $ events collected with the BESIII detector at the BEPCII storage ring, the reactions $I^£^{+} n \to I^ p$ and $Î£^{+}n\rightarrowÎ£^…

hep-ex2026

Observation of $I ¨ _{c J} (J = 0, 1, 2) \to p p ˉ I^\cdot I^\cdot$

BESIII Collaboration, M. Ablikim, M. N. Achasov +677

Using $(2712.4 \pm 14.3) \times 1 0^{6}$ $I ¨ (3686)$ events collected by the BESIII detector operating at the BEPCII storage ring, the decays $I ¨ _{c J} (J = 0, 1, 2) \to p p ˉ I^\cdot I^\cdot$ are…

Search for the charged lepton flavour violating decay η′→eμ

Proof of principle for nucleon polarization measurement at BESIII

Study of the e+e−→I¨+I¨−Ds+​Ds−​ process from s​ = 4.42 to 4.95 GeV at BESIII

Precise Measurement of Chromoelectric Dipole Moment of the Charm Quark

First measurement of I^£+n→I^p and I^£+n→I^£0p cross sections via I^£+-nucleus scattering at an electron-positron collider

Observation of I¨cJ​(J=0,1,2)→ppˉ​I^⋅I^⋅

Search for the charged lepton flavour violating decay $η^{'} \to e μ$

Study of the $e^{+} e^{-} \to I ¨ ^{+} I ¨ ^{-} D_{s}^{+} D_{s}^{-}$ process from $s$ = 4.42 to 4.95 GeV at BESIII

First measurement of $I^£^{+} n \to I^ p$ and $I^£^{+} n \to I^£^{0} p$ cross sections via $I^£^{+}$ -nucleus scattering at an electron-positron collider

Observation of $I ¨ _{c J} (J = 0, 1, 2) \to p p ˉ I^\cdot I^\cdot$