Q. N. Xu

activity

20122026

most citedObservation of a charged charmoniumlike structure in e+e- to pi+pi-J/psi at \sqrt{s}=4.26 GeV

919 citations · 2k across the 169 of their papers we have counts for

collaborators

169 papers

hep-ex2026

Measurement of the double Dalitz decay $η \to e^{+} e^{-} e^{+} e^{-}$

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

Using a data sample of $(1.0087 \pm 0.0044) \times 1 0^{10}$ $J / ψ$ events collected with the BESIII detector, we study the rare double Dalitz decay of $η \to e^{+} e^{-} e^{+} e^{-}$ …

hep-ex2026

Amplitude Analysis of the Isospin-Violating Decay $J / ψ \to γ η π^{0}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +759

Using $(10087 \pm 44) \times 1 0^{6}$ $J / ψ$ events collected with the BESIII detector, we perform the first amplitude analysis of the process $J / ψ \to γ η π^{0}$ . The decay is dominated b…

hep-ex2026

Observation of $Λ_{c}^{+} \to n π^{+} η$ and search for $Λ_{c}^{+} \to n a_{0} (980)^{+}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +719

By analysing 6.1 $fb^{- 1}$ of data collected at center-of-mass energies between $s = 4.600$ and 4.843 $GeV$ with the BESIII detector at the BEPCII collider, we obser…

hep-ex2026★ 2 cited

Precise Measurement of Matter-Antimatter Asymmetry with Entangled Hyperon Antihyperon Pairs

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

A search for $C P$ violation with an entangled system of $Ξ^{-} Ξ ˉ^{+}$ pairs is performed, using $(10, 087 \pm 44) \times 1 0^{6}$ $J / ψ$ events collected with the BESIII experiment. A nine…

hep-ex2026

Observation of $Λ ˉ p \to K^{+} π^{+} π^{-} π^{0}$ and $Λ ˉ p \to K^{+} π^{+} π^{-} 2 π^{0}$

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

Using $(10087 \pm 44) \times 1 0^{6}$ $J / ψ$ events collected with the BESIII detector at a center-of-mass energy of $s = 3.097$ GeV, the antihyperon-nucleon annihilation processe…

hep-ex2026

Amplitude analysis and branching fraction measurement of $J / ψ \to Λ Σ ˉ^{0} η + c.c$

BESIII Collaboration, M. Ablikim, M. N. Achasov +703

Based on a sample of $(10087 \pm 44) \times 1 0^{6}$ $J / ψ$ events collected with the BESIII detector, a partial-wave analysis of $J / ψ \to Λ Σ ˉ^{0} η + c.c$ is performed for th…

hep-ex2026

Cross section measurement of $e^{+} e^{-} \to π^{0} π^{0} ψ (3686)$ from $s =$ 4.008 GeV to 4.951 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +682

Using data samples with a total integrated luminosity of $22.1 f b^{- 1}$ at center-of-mass energies between 4.008 and 4.951~GeV collected with the BESIII detector, the cross sec…

hep-ex2026

Search for the isospin-violating decays $χ_{cJ} \to Λ Σ ˉ^{0} + c . c .$ and $η_{c} \to Λ Σ ˉ^{0} + c . c .$

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

Using a sample of $(2712.4 \pm 14.3) \times 1 0^{6}$ ~ $ψ (3686)$ events collected with the BESIII detector, we perform a search for the isospin-violating decays $χ_{cJ}\toΛ\barΣ^{0}+c.c.~…

hep-ex2026

Observation of $Ξ (1530)^{0}$ Polarization and Determination of Its Electric and Magnetic Moments in $ψ (3686) \to Ξ (1530)^{0} Ξ ˉ (1530)^{0}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +703

Using the data sample of $2.7 \times 1 0^{9}$ $ψ (3686)$ events collected with the BESIII detector at the BEPCII collider, we present an observation of the $Ξ (1530)^{0}$ polarization in th…

hep-ex2025

Measurements of the Absolute Branching Fraction of the Semileptonic Decay $Ξ^{-} \to Λ e^{-} ν ˉ_{e}$ and the Axial Charge of the $Ξ^{-}$

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

Using $(10087 \pm 44) \times 1 0^{6}$ $J / ψ$ events collected with the BESIII detector, we study the semileptonic decay $Ξ^{-} \to Λ e^{-} ν ˉ_{e}$ for the first time at an electron-…

hep-ex2025

Search for the decays $X (3872) \to K_{S}^{0} K^{\pm} π^{\mp}$ and $K^{*} (892) K ˉ$ at BESIII

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

Using a 10.9 fb $^{- 1}$ data sample collected by the BESIII detector at center-of-mass energies from 4.16 to 4.34 GeV, we search for the charmless decays $X(3872) \to K_{S}^{0}K^{\p…

hep-ex2025

Search for the lepton number violating process $Ξ^{-} \to Σ^{+} e^{-} e^{-} + c . c .$

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

We present a search for the lepton number violating decay $Ξ^{-} \to Σ^{+} e^{-} e^{-} + c . c .$ with $(10087 \pm 44) \times 1 0^{6}$ $J / ψ$ events collected by the BESIII detector at the BEPCII…

hep-ex2025

Study of the reactions $n ˉ p \to 2 π^{+} π^{-}$ , $2 π^{+} π^{-} π^{0}$ , and $2 π^{+} π^{-} 2 π^{0}$ using $J / ψ \to p π^{-} n ˉ$

BESIII Collaboration, M. Ablikim, M. N. Achasov +688

We report an experimental investigation of the reactions $n ˉ p \to 2 π^{+} π^{-}$ , $n ˉ p \to 2 π^{+} π^{-} π^{0}$ , and $n ˉ p \to 2 π^{+} π^{-} 2 π^{0}$ using $(10.087 \pm 0.0…

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

First Measurement of the $D_{s}^{+} \to K^{0} μ^{+} ν_{μ}$ Decay

BESIII Collaboration, M. Ablikim, M. N. Achasov +693

We report the first measurement of the semileptonic decay $D_{s}^{+} \to K^{0} μ^{+} ν_{μ}$ , using a sample of $e^{+} e^{-}$ annihilation data corresponding to an integrated luminosity of $…

hep-ex2025★ 2 cited

Search for a hypothetical gauge boson and dark photons in charmonium transitions

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

We report a direct search for a new gauge boson, $X$ , with a mass of $17 MeV / c^{2}$ , which could explain the anomalous excess of $e^{+} e^{-}$ pairs observed in the $^{8} Be$ n…

hep-ex2025★ 1 cited

Study of the Magnetic Dipole Transition of $J / ψ \to γ η_{c}$ via $η_{c} \to p p ˉ$

BESIII Collaboration, M. Ablikim, M. N. Achasov +692

Using $(10.087 \pm 0.044) \times 1 0^{9}$ $J / ψ$ events collected with the BESIII detector at the $e^{+} e^{-}$ BEPCII collider, we present the first amplitude analysis of $J / ψ \to γ p p ˉ$ wit…

hep-ex2025

Search for the lepton number violating decay $η \to π^{+} π^{+} e^{-} e^{-} + c . c .$ via $J / ψ \to ϕ η$

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

Based on a sample of $(10.087 \pm 0.044) \times 1 0^{9} J / ψ$ events collected by the BESIII detector at the BEPCII collider, we perform the first search for the lepton number violati…

hep-ex2025★ 1 cited

Observation of a threshold enhancement in the $π^{+} π^{-}$ spectrum in $ψ (3686) \to π^{+} π^{-} J / ψ$ decays

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

Based on the $(2712.4 \pm 14.4) \times 1 0^{6}$ $ψ (3686)$ events collected with the BESIII detector, we present a high-precision study of the $π^{+} π^{-}$ mass spectrum in $ψ(3686)\rightar…

hep-ex2025

Observation of $ψ (3686) \to γ η (1405)$ via $η (1405) \to f_{0} (980) π^{0}$

M. Ablikim, M. N. Achasov, P. Adlarson +694

The decay $ψ (3686) \to γ π^{+} π^{-} π^{0}$ is studied using a sample of $(2712.4 \pm 14.3) \times 1 0^{6}$ $ψ (3686)$ events collected with the BESIII detector. The decay $η (1405) \to π^{+} π^{-} π^{0}$ is ob…

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

Search for CP violation in $e^{+} e^{-} \to ψ (3770) \to D^{0} D ˉ^{0}$ via $D - > K_{S}^{0} π^{0}$

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

Utilizing data sample of electron-positron collisions recorded with the BESIII detector at the center of mass energy of 3.773 GeV, corresponding to an integrated luminosity of 20.2…

hep-ex2025

Production and Decay Dynamics of the Charmed Baryon $Λ_{c}^{+}$ in $e^{+} e^{-}$ Annihilations near Threshold

BESIII Collaboration, M. Ablikim, M. N. Achasov +700

The study of the charmed baryons is crucial for investigating the strong and weak interactions in the standard model and for gaining insights into the internal structure of baryons…

hep-ex2025★ 2 cited

Measurement of the Born cross section for $e^{+} e^{-} \to p K^{-} K^{-} Ξ ˉ^{+}$ at $s =$ 3.5-4.9 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +695

Using $e^{+} e^{-}$ collision data corresponding to a total integrated luminosity of 20 $fb^{- 1}$ collected with the BESIII detector at the BEPCII collider, we present a measurem…

Measurement of the double Dalitz decay η→e+e−e+e−

Amplitude Analysis of the Isospin-Violating Decay J/ψ→γηπ0

Observation of Λc+​→nπ+η and search for Λc+​→na0​(980)+

Precise Measurement of Matter-Antimatter Asymmetry with Entangled Hyperon Antihyperon Pairs

Observation of Λˉp→K+π+π−π0 and Λˉp→K+π+π−2π0

Amplitude analysis and branching fraction measurement of J/ψ→ΛΣˉ0η+c.c

Cross section measurement of e+e−→π0π0ψ(3686) from s​= 4.008 GeV to 4.951 GeV

Search for the isospin-violating decays χcJ​→ΛΣˉ0+c.c. and ηc​→ΛΣˉ0+c.c.

Observation of Ξ(1530)0 Polarization and Determination of Its Electric and Magnetic Moments in ψ(3686)→Ξ(1530)0Ξˉ(1530)0

Measurements of the Absolute Branching Fraction of the Semileptonic Decay Ξ−→Λe−νˉe​ and the Axial Charge of the Ξ−

Search for the decays X(3872)→KS0​K±π∓ and K∗(892)Kˉ at BESIII

Search for the lepton number violating process Ξ−→Σ+e−e−+c.c.

Study of the reactions nˉp→2π+π−, 2π+π−π0, and 2π+π−2π0 using J/ψ→pπ−nˉ

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

First Measurement of the Ds+​→K0μ+νμ​ Decay

Search for a hypothetical gauge boson and dark photons in charmonium transitions

Study of the Magnetic Dipole Transition of J/ψ→γηc​ via ηc​→ppˉ​

Search for the lepton number violating decay η→π+π+e−e−+c.c. via J/ψ→ϕη

Observation of a threshold enhancement in the π+π− spectrum in ψ(3686)→π+π−J/ψ decays

Observation of ψ(3686)→γη(1405) via η(1405)→f0​(980)π0

Helicity amplitude and branching fraction measurement of χcJ​→ΛΛˉ

Search for CP violation in e+e−→ψ(3770)→D0Dˉ0 via D−>KS0​π0

Production and Decay Dynamics of the Charmed Baryon Λc+​ in e+e− Annihilations near Threshold

Measurement of the Born cross section for e+e−→pK−K−Ξˉ+ at s​= 3.5-4.9 GeV

Measurement of the double Dalitz decay $η \to e^{+} e^{-} e^{+} e^{-}$

Amplitude Analysis of the Isospin-Violating Decay $J / ψ \to γ η π^{0}$

Observation of $Λ_{c}^{+} \to n π^{+} η$ and search for $Λ_{c}^{+} \to n a_{0} (980)^{+}$

Observation of $Λ ˉ p \to K^{+} π^{+} π^{-} π^{0}$ and $Λ ˉ p \to K^{+} π^{+} π^{-} 2 π^{0}$

Amplitude analysis and branching fraction measurement of $J / ψ \to Λ Σ ˉ^{0} η + c.c$

Cross section measurement of $e^{+} e^{-} \to π^{0} π^{0} ψ (3686)$ from $s =$ 4.008 GeV to 4.951 GeV

Search for the isospin-violating decays $χ_{cJ} \to Λ Σ ˉ^{0} + c . c .$ and $η_{c} \to Λ Σ ˉ^{0} + c . c .$

Observation of $Ξ (1530)^{0}$ Polarization and Determination of Its Electric and Magnetic Moments in $ψ (3686) \to Ξ (1530)^{0} Ξ ˉ (1530)^{0}$

Measurements of the Absolute Branching Fraction of the Semileptonic Decay $Ξ^{-} \to Λ e^{-} ν ˉ_{e}$ and the Axial Charge of the $Ξ^{-}$

Search for the decays $X (3872) \to K_{S}^{0} K^{\pm} π^{\mp}$ and $K^{*} (892) K ˉ$ at BESIII

Search for the lepton number violating process $Ξ^{-} \to Σ^{+} e^{-} e^{-} + c . c .$

Study of the reactions $n ˉ p \to 2 π^{+} π^{-}$ , $2 π^{+} π^{-} π^{0}$ , and $2 π^{+} π^{-} 2 π^{0}$ using $J / ψ \to p π^{-} n ˉ$

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

First Measurement of the $D_{s}^{+} \to K^{0} μ^{+} ν_{μ}$ Decay

Study of the Magnetic Dipole Transition of $J / ψ \to γ η_{c}$ via $η_{c} \to p p ˉ$

Search for the lepton number violating decay $η \to π^{+} π^{+} e^{-} e^{-} + c . c .$ via $J / ψ \to ϕ η$

Observation of a threshold enhancement in the $π^{+} π^{-}$ spectrum in $ψ (3686) \to π^{+} π^{-} J / ψ$ decays

Observation of $ψ (3686) \to γ η (1405)$ via $η (1405) \to f_{0} (980) π^{0}$

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

Search for CP violation in $e^{+} e^{-} \to ψ (3770) \to D^{0} D ˉ^{0}$ via $D - > K_{S}^{0} π^{0}$

Production and Decay Dynamics of the Charmed Baryon $Λ_{c}^{+}$ in $e^{+} e^{-}$ Annihilations near Threshold

Measurement of the Born cross section for $e^{+} e^{-} \to p K^{-} K^{-} Ξ ˉ^{+}$ at $s =$ 3.5-4.9 GeV