X. Niu

activity

20142019

most citedDirect detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons

541 citations · 4.2k across the 94 of their papers we have counts for

collaborators

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90 papers · 1 filter

hep-ex2019★ 28 cited

Observation of $D^{+} \to η η π^{+}$ and improved measurement of $D^{0 (+)} \to η π^{+} π^{- (0)}$

BESIII Collaboration

Using an $e^{+} e^{-}$ annihilation data sample corresponding to an integrated luminosity of $2.93 f b^{- 1}$ collected at the center-of-mass energy of 3.773\,GeV with the BESIII det…

hep-ex2019★ 14 cited

Evidence for $Z_{c}^{\pm}$ decays into the $ρ^{\pm} η_{c}$ final state

M. Ablikim, M. N. Achasov, S. Ahmed +458

We study $e^{+} e^{-}$ collisions with a $π^{+} π^{-} π^{0} η_{c}$ final state using data samples collected with the BESIII detector at center-of-mass energies $s = 4.226$ , $4.258…

hep-ex2019★ 8 cited

Observation of $η_{c} \to ω ω$ in $J / ψ \to γ ω ω$

M. Ablikim, M. N. Achasov, S. Ahmed +451

Using a sample of $(1310.6 \pm 7.0) \times 1 0^{6}$ $J / ψ$ events recorded with the BESIII detector at the symmetric electron positron collider BEPCII, we report the observation of the dec…

hep-ex2019★ 4 cited

Search for rare decay $J / ψ \to ϕ e^{+} e^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +462

Using a data sample of $448.1 \times 1 0^{6}$ $ψ (3686)$ events collected at $s =$ 3.686 GeV with the BESIII detector at the BEPCII, we search for the rare decay $J / ψ \to ϕ e^{+} e^{-}$ …

hep-ex2019★ 13 cited

Search for heavy Majorana neutrino in lepton number violating decays of D-> K pi e+ e+

BESIII Collaboration, M. Ablikim, M. N. Achasov +456

Using the data sample of an integrated luminosity of 2.93 fb $^{- 1}$ taken at the center-of-mass energy of 3.773 GeV, we search for the Majorana neutrino in the lepton number violat…

hep-ex2019★ 1 cited

Observation of $χ_{c J} \to 4 K_{S}^{0}$

M. Ablikim, M. N. Achasov, S. Ahmed +461

By analyzing $(448.1 \pm 2.9) \times 1 0^{6}$ $ψ (3686)$ events collected with the BESIII detector operating at the BEPCII collider, the decays of $χ_{c J} \to 4 K_{S}^{0}$ ( $J = 0, 1, 2$ ) are obser…

hep-ex2019★ 2 cited

Amplitude analysis of $D^{+} \to K_{S}^{0} π^{+} π^{+} π^{-}$

M. Ablikim, M. N. Achasov, S. Ahmed +458

The decay $D^{+} \to K_{S}^{0} π^{+} π^{+} π^{-}$ is studied with an amplitude analysis using a data set of 2.93${\mbox{\,fb}^{-1}}$ of $e^{+} e^{+}$ collisions at the $ψ (3770)$ …

hep-ex2019★ 35 cited

Measurement of the Dynamics of the Decays $D_{s}^{+} \to η^{(')} e^{+} ν_{e}$

M. Ablikim, M. N. Achasov, S. Ahmed +458

Using $e^{+} e^{-}$ annihilation data corresponding to an integrated luminosity of 3.19\,fb $^{- 1}$ collected at a center-of-mass energy of 4.178~GeV with the BESIII detector, we measure…

hep-ex2018★ 8 cited

Observation of $e^{+} e^{-} \to D_{s}^{+} D^{(*) 0} K^{-}$ and study of the $P$ -wave $D_{s}$ mesons

BESIII Collaboration, M. Ablikim, M. N. Achasov +453

Studies of $e^{+} e^{-} \to D_{s}^{+} D^{(*) 0} K^{-}$ and the $P$ -wave charmed-strange mesons are performed based on an $e^{+} e^{-}$ collision data sample corresponding to an integrat…

hep-ex2018★ 13 cited

Observation of $ψ (3686) \to p p ˉ η^{'}$ and improved measurement of $J / ψ \to p p ˉ η^{'}$

M. Ablikim, M. N. Achasov, S. Ahmed +460

We observe the process $ψ (3686) \to p p ˉ η^{'}$ for the first time, with a statistical significance higher than 10 $σ$ , and measure the branching fraction of $J/ψ\to p \ba…

hep-ex2018★ 81 cited

Measurement of $e^{+} e^{-} \to K^{+} K^{-}$ cross section at $s = 2.00 - 3.08$ GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +455

The cross section of the process $e^{+} e^{-} \to K^{+} K^{-}$ is measured at a number of center-of-mass energies $s$ from 2.00 to 3.08 GeV with the BESIII detector…

hep-ex2018★ 24 cited

Dalitz Plot Analysis of the Decay $ω \to π^{+} π^{-} π^{0}$

M. Ablikim, M. N. Achasov, S. Ahmed +461

Using a low-background sample of $2.6 \times 1 0^{5}$ $J / ψ \to ω η (ω \to π^{+} π^{-} π^{0}, η \to γ γ)$ events, about 5 times larger statistics than previous experiments,…

hep-ex2018★ 24 cited

Study of the decay $D^{0} \to K ˉ^{0} π^{-} e^{+} ν_{e}$

M. Ablikim, M. N. Achasov, S. Ahmed +459

We report a study of the decay $D^{0} \to K ˉ^{0} π^{-} e^{+} ν_{e}$ based on a sample of $2.93 fb^{- 1}$ $e^{+} e^{-}$ annihilation data collected at the center-of-mass energy…

hep-ex2018★ 14 cited

Observation of $D_{s}^{+} \to p n ˉ$ and confirmation of its large branching fraction

BESIII Collaboration, M. Ablikim, M. N. Achasov +455

The baryonic decay $D_{s}^{+} \to p n ˉ$ is observed, and the corresponding branching fraction is measured to be $(1.21 \pm 0.10 \pm 0.05) \times 1 0^{- 3}$ , where the first uncertai…

hep-ex2018★ 15 cited

Measurements of $e^{+} e^{-} \to K_{S}^{0} K^{\pm} π^{\mp} π^{0}$ and $K_{S}^{0} K^{\pm} π^{\mp} η$ at center-of-mass energies from $3.90$ to $4.60 GeV$

M. Ablikim, M. N. Achasov, S. Ahmed +458

Using $5.2 fb^{- 1}$ $e^{+} e^{-}$ annihilation data samples collected with the BESIII detector, we measure the cross sections of $e^{+} e^{-} \to K_{S}^{0} K^{\pm} π^{\mp} π^{0}$ and $K_{S…

hep-ex2018★ 11 cited

First observations of $h_{c} \to$ hadrons

M. Ablikim, M. N. Achasov, S. Ahmed +461

Based on $(4.48 \pm 0.03) \times 1 0^{8}$ $ψ (3686)$ events collected with the BESIII detector, five $h_{c}$ hadronic decays are searched for via process $ψ (3686) \to π^{0} h_{c}$ . Three o…

hep-ex2018★ 8 cited

Observation of OZI suppressed decays $χ_{c J} \to ω ϕ$

M. Ablikim, M. N. Achasov, S. Ahmed +462

Decays $χ_{c J} (J = 0, 1, 2) \to ω ϕ$ are studied using $(448.1 \pm 2.9) \times 1 0^{6} ψ (3686)$ events collected with the BESIII detector in 2009 and 2012. In addition to the previously est…

hep-ex2018★ 3 cited

Observation of $D^{0 (+)} \to K_{S}^{0} π^{0 (+)} η^{'}$ and improved measurement of $D^{0} \to K^{-} π^{+} η^{'}$

M. Ablikim, M. N. Achasov, S. Ahmed +459

By analyzing $2.93 f b^{- 1}$ of data taken at a center-of-mass energy of 3.773~GeV with the BESIII detector, we measure the branching fractions of the Cabibbo-favored hadronic…

hep-ex2018★ 26 cited

Measurement of $B (J / ψ \to η^{'} e^{+} e^{-}$ ) and search for a dark photon

M. Ablikim, M. N. Achasov, S. Ahmed +455

Using a data sample of $(1310.6 \pm 7.0) \times 1 0^{6}$ $J / ψ$ decay events collected with the BESIII detector at BEPCII, we study the electromagnetic Dalitz decay $J / ψ \to η^{'} e^{+} e^{-}$ wi…

hep-ex2018★ 8 cited

First measurement of $e^{+} e^{-} \to p K_{S}^{0} n ˉ K^{-} + c . c .$ above open charm threshold

BESIII Collaboration, M. Ablikim, M. N. Achasov +435

The process $e^{+} e^{-} \to p K_{S}^{0} n ˉ K^{-} + c . c .$ and its intermediate processes are studied for the first time, using data samples collected with the BESIII detector a…

hep-ex2018★ 208 cited

Polarization and Entanglement in Baryon-Antibaryon Pair Production in Electron-Positron Annihilation

BESIII Collaboration, M. Ablikim, M. N. Achasov +465

Using a sample of $1.31 \times 1 0^{9}$ $J / ψ$ events collected with the BESIII detector, we report the first observation of spin polarization of $Λ$ and $Λ ˉ$ hyperons from the coher…

hep-ex2018★ 45 cited

Amplitude analysis of the $K_{S} K_{S}$ system produced in radiative $J / ψ$ decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +444

An amplitude analysis of the $K_{S} K_{S}$ system produced in radiative $J / ψ$ decays is performed using the $(1310.6 \pm 7.0) \times 1 0^{6}$ $J / ψ$ decays collected by the BESIII detecto…

hep-ex2018★ 18 cited

Search for invisible decays of $ω$ and $ϕ$ with $J / ψ$ data at BESIII

M. Ablikim, M. N. Achasov, S. Ahmed +458

Using a data sample of $(1310.6 \pm 7.0) \times 1 0^{6}$ $J / ψ$ events collected with the BESIII detector operating at the BEPCII collider, we perform the first experimental search for…

hep-ex2018★ 30 cited

Measurement of the absolute branching fraction of the inclusive semileptonic $Λ_{c}^{+}$ decay

BESIII Collaboration, M. Ablikim, M. N. Achasov +435

Using a data sample corresponding to an integrated luminosity of 567 pb $^{- 1}$ collected at a center-of-mass energy of $s = 4.6$ GeV with the BESIII detector, we measure the a…

Observation of D+→ηηπ+ and improved measurement of D0(+)→ηπ+π−(0)

Evidence for Zc±​ decays into the ρ±ηc​ final state

Observation of ηc​→ωω in J/ψ→γωω

Search for rare decay J/ψ→ϕe+e−

Search for heavy Majorana neutrino in lepton number violating decays of D-> K pi e+ e+

Observation of χcJ​→4KS0​

Amplitude analysis of D+→KS0​π+π+π−

Measurement of the Dynamics of the Decays Ds+​→η(′)e+νe​

Observation of e+e−→Ds+​D(∗)0K− and study of the P-wave Ds​ mesons

Observation of ψ(3686)→ppˉ​η′ and improved measurement of J/ψ→ppˉ​η′

Measurement of e+e−→K+K− cross section at s​=2.00−3.08 GeV

Dalitz Plot Analysis of the Decay ω→π+π−π0

Study of the decay D0→Kˉ0π−e+νe​

Observation of Ds+​→pnˉ and confirmation of its large branching fraction

Measurements of e+e−→KS0​K±π∓π0 and KS0​K±π∓η at center-of-mass energies from 3.90 to 4.60 GeV

First observations of hc​→ hadrons

Observation of OZI suppressed decays χcJ​→ωϕ

Observation of D0(+)→KS0​π0(+)η′ and improved measurement of D0→K−π+η′

Measurement of B(J/ψ→η′e+e−) and search for a dark photon

First measurement of e+e−→pKS0​nˉK−+c.c. above open charm threshold

Polarization and Entanglement in Baryon-Antibaryon Pair Production in Electron-Positron Annihilation

Amplitude analysis of the KS​KS​ system produced in radiative J/ψ decays

Search for invisible decays of ω and ϕ with J/ψ data at BESIII

Measurement of the absolute branching fraction of the inclusive semileptonic Λc+​ decay

Observation of $D^{+} \to η η π^{+}$ and improved measurement of $D^{0 (+)} \to η π^{+} π^{- (0)}$

Evidence for $Z_{c}^{\pm}$ decays into the $ρ^{\pm} η_{c}$ final state

Observation of $η_{c} \to ω ω$ in $J / ψ \to γ ω ω$

Search for rare decay $J / ψ \to ϕ e^{+} e^{-}$

Observation of $χ_{c J} \to 4 K_{S}^{0}$

Amplitude analysis of $D^{+} \to K_{S}^{0} π^{+} π^{+} π^{-}$

Measurement of the Dynamics of the Decays $D_{s}^{+} \to η^{(')} e^{+} ν_{e}$

Observation of $e^{+} e^{-} \to D_{s}^{+} D^{(*) 0} K^{-}$ and study of the $P$ -wave $D_{s}$ mesons

Observation of $ψ (3686) \to p p ˉ η^{'}$ and improved measurement of $J / ψ \to p p ˉ η^{'}$

Measurement of $e^{+} e^{-} \to K^{+} K^{-}$ cross section at $s = 2.00 - 3.08$ GeV

Dalitz Plot Analysis of the Decay $ω \to π^{+} π^{-} π^{0}$

Study of the decay $D^{0} \to K ˉ^{0} π^{-} e^{+} ν_{e}$

Observation of $D_{s}^{+} \to p n ˉ$ and confirmation of its large branching fraction

Measurements of $e^{+} e^{-} \to K_{S}^{0} K^{\pm} π^{\mp} π^{0}$ and $K_{S}^{0} K^{\pm} π^{\mp} η$ at center-of-mass energies from $3.90$ to $4.60 GeV$

First observations of $h_{c} \to$ hadrons

Observation of OZI suppressed decays $χ_{c J} \to ω ϕ$

Observation of $D^{0 (+)} \to K_{S}^{0} π^{0 (+)} η^{'}$ and improved measurement of $D^{0} \to K^{-} π^{+} η^{'}$

Measurement of $B (J / ψ \to η^{'} e^{+} e^{-}$ ) and search for a dark photon

First measurement of $e^{+} e^{-} \to p K_{S}^{0} n ˉ K^{-} + c . c .$ above open charm threshold

Amplitude analysis of the $K_{S} K_{S}$ system produced in radiative $J / ψ$ decays

Search for invisible decays of $ω$ and $ϕ$ with $J / ψ$ data at BESIII

Measurement of the absolute branching fraction of the inclusive semileptonic $Λ_{c}^{+}$ decay