S. Fang

activity

20242026

collaborators

6 papers

hep-ex2026

Observation of the Exotic State $π_{1} (1600)$ in $ψ (2 S) \to γ χ_{c 1}, χ_{c 1} \to π^{+} π^{-} η^{'}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +750

A partial wave analysis of the process $ψ (2 S) \to γ χ_{c 1}, χ_{c 1} \to π^{+} π^{-} η^{'}$ is performed using $(2712.4 \pm 14.3) \times 1 0^{6}$ $ψ (2 S)$ events collected with t…

hep-ex2026

First Observation of \boldmath{ $D^{+} \to a_{0} (980) ρ$ and $D^{+} \to a_{0} (980)^{+} f_{0} (500)$ } in \boldmath{ $D^{+} \to π^{+} π^{+} π^{-} η$ and $D^{+} \to π^{+} π^{0} π^{0} η$ } Decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +756

We perform the first amplitude analysis of the singly Cabibbo-suppressed decays $D^{+} \to π^{+} π^{+ (0)} π^{- (0)} η$ , using $e^{+} e^{-}$ collision data collected with the BESIII detector…

hep-ex2026

Measurement of the branching fractions of $χ_{c J} \to π^{+} π^{-} π^{0} π^{0}$ via $ψ (3686) \to γ χ_{c J}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +762

Using $(2712.4 \pm 14.3) \times 1 0^{6}$ $ψ (3686)$ events collected with the BESIII detector operating at BEPCII, the branching fractions of $χ_{c J} \to π^{+} π^{-} π^{0} π^{0}$ ( $J = 0, 1, 2$ ) are mea…

hep-ex2026

Precise measurement of the form factors in $D^{0} \to K^{} (892)^{-} ℓ^{+} ν_{ℓ}$ and observation of $D^{0} \to K_{2}^{} (1430)^{-} ℓ^{+} ν_{ℓ}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +680

We report a study of the semileptonic decays $D^{0} \to K ˉ^{0} π^{-} ℓ^{+} ν_{ℓ}$ (where $ℓ = e, μ$ ) based on a sample of $20.3 fb^{- 1}$ of $e^{+} e^{-}$ annihilation…

hep-ex2025

Huizhou Hadron Spectrometer -- a Proposed High-rate Experimental Setup at the High Intensity Heavy-ion Accelerator Facility

Xurong Chen, Yunyun Fan, Shuangshi Fang +33

The High-Intensity Heavy-Ion Accelerator Facility (HIAF), currently under construction in Huizhou, Guangdong Province, China, is projected to be completed by 2025. This facility wi…

hep-ex2024

Flavor Physics at the CEPC: a General Perspective

Xiaocong Ai, Wolfgang Altmannshofer, Peter Athron +147

We discuss the landscape of flavor physics at the Circular Electron-Positron Collider (CEPC), based on the nominal luminosity outlined in its Technical Design Report. The CEPC is d…

Observation of the Exotic State π1​(1600) in ψ(2S)→γχc1​,χc1​→π+π−η′

First Observation of \boldmath{D+→a0​(980)ρ and D+→a0​(980)+f0​(500)} in \boldmath{D+→π+π+π−η and D+→π+π0π0η} Decays

Measurement of the branching fractions of χcJ​→π+π−π0π0 via ψ(3686)→γχcJ​

Precise measurement of the form factors in D0→K∗(892)−ℓ+νℓ​ and observation of D0→K2∗​(1430)−ℓ+νℓ​

Huizhou Hadron Spectrometer -- a Proposed High-rate Experimental Setup at the High Intensity Heavy-ion Accelerator Facility

Flavor Physics at the CEPC: a General Perspective

Observation of the Exotic State $π_{1} (1600)$ in $ψ (2 S) \to γ χ_{c 1}, χ_{c 1} \to π^{+} π^{-} η^{'}$

First Observation of \boldmath{ $D^{+} \to a_{0} (980) ρ$ and $D^{+} \to a_{0} (980)^{+} f_{0} (500)$ } in \boldmath{ $D^{+} \to π^{+} π^{+} π^{-} η$ and $D^{+} \to π^{+} π^{0} π^{0} η$ } Decays

Measurement of the branching fractions of $χ_{c J} \to π^{+} π^{-} π^{0} π^{0}$ via $ψ (3686) \to γ χ_{c J}$

Precise measurement of the form factors in $D^{0} \to K^{} (892)^{-} ℓ^{+} ν_{ℓ}$ and observation of $D^{0} \to K_{2}^{} (1430)^{-} ℓ^{+} ν_{ℓ}$