C. Geng

activity

20242026

collaborators

31 papers

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

Measurement of branching fractions of $D_{s}^{+} \to K_{S}^{0} K_{S}^{0} π^{+} π^{0}$ and $D_{s}^{+} \to K_{S}^{0} K^{+} π^{0} π^{0}$

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

By analyzing $e^{+} e^{-}$ collision data corresponding to an integrated luminosity of 7.33~fb $^{- 1}$ collected with the BESIII detector at center-of-mass energies ranging from 4.128 to…

hep-ex2026

Study of $I ¨ \to K K ˉ$ in the amplitude analysis of $D^{+} \to K_{S}^{0} K_{L}^{0} I ¨ ^{+}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +772

We present the first amplitude analysis and branching fraction measurement of $D^{+} \to K_{S}^{0} K_{L}^{0} I ¨ ^{+}$ decay. The analysis uses a dataset corresponding to an in…

hep-ph2026

Spin-flavor entanglement in $I^_{b} \to I^ D$ and weak phase extraction

Yong Du, Chao-Qiang Geng, Xiao-Gang He +3

We identify a new spin-flavor entanglement structure in $I^_{b} \to I^ D$ decays, formed by the correlation between the $I^$ spin and the $D$ flavor states ($D=D^0,\overline D^0,D_1,D_2…

hep-ex2025

Observation of the singly Cabibbo suppressed decay $D^{0} \to b_{1} (1235)^{-} e^{+} I^½_{e}$ and evidence for $D^{+} \to b_{1} (1235)^{0} e^{+} I^½_{e}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +657

By analyzing a data sample of $e^{+} e^{-}$ collisions with center-of-mass energy $s = 3.773$ ~GeV, corresponding to an integrated luminosity of $7.9 fb^{- 1}$ collected with t…

hep-ex2025

Observation of Charmonium $h_{c}$ Radiative Decays to Multiple Light Hadrons and the Tensor State $f_{2} (1270)$

BESIII Collaboration, M. Ablikim, M. N. Achasov +668

Using $I ¨ (3686) \to I ¨ ^{0} h_{c}$ decays from a data sample of $(27.12 \pm 0.14) \times 1 0^{8}$ $I ¨ (3686)$ events collected by the BESIII detector at the BEPCII collider, $h_{c}$ …

Proof of principle for nucleon polarization measurement at BESIII

Measurement of branching fractions of Ds+​→KS0​KS0​π+π0 and Ds+​→KS0​K+π0π0

Study of I¨→KKˉ in the amplitude analysis of D+→KS0​KL0​I¨+

Spin-flavor entanglement in I^b​→I^D and weak phase extraction

Observation of the singly Cabibbo suppressed decay D0→b1​(1235)−e+I^½e​ and evidence for D+→b1​(1235)0e+I^½e​

Observation of Charmonium hc​ Radiative Decays to Multiple Light Hadrons and the Tensor State f2​(1270)

Measurement of branching fractions of $D_{s}^{+} \to K_{S}^{0} K_{S}^{0} π^{+} π^{0}$ and $D_{s}^{+} \to K_{S}^{0} K^{+} π^{0} π^{0}$

Study of $I ¨ \to K K ˉ$ in the amplitude analysis of $D^{+} \to K_{S}^{0} K_{L}^{0} I ¨ ^{+}$

Spin-flavor entanglement in $I^_{b} \to I^ D$ and weak phase extraction

Observation of the singly Cabibbo suppressed decay $D^{0} \to b_{1} (1235)^{-} e^{+} I^½_{e}$ and evidence for $D^{+} \to b_{1} (1235)^{0} e^{+} I^½_{e}$

Observation of Charmonium $h_{c}$ Radiative Decays to Multiple Light Hadrons and the Tensor State $f_{2} (1270)$