Qingnian Xu

activity

20092020

Λ

hyperon polarization in nuclear collisions: evidence for the most vortical fluid

920 citations · 2.6k across the 39 of their papers we have counts for

collaborators

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13 papers · 1 filter

hep-ex2019★ 32 cited

Search for $C P$ violation and observation of $P$ violation in $Λ_{b}^{0} \to p π^{-} π^{+} π^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +902

A search for $C P$ violation in the $Λ_{b}^{0} \to p π^{-} π^{+} π^{-}$ decay is performed using LHCb data corresponding to an integrated luminosity of 6.6 $f b^{- 1}$ collected in $pp$ coll…

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★ 11 cited

Observation of the $W$ -Annihilation Decay $D_{s}^{+} \to ω π^{+}$ and Evidence for $D_{s}^{+} \to ω K^{+}$

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

We report on the observation of the $W$ -annihilation decay $D_{s}^{+} \to ω π^{+}$ and the evidence for $D_{s}^{+} \to ω K^{+}$ with a data sample corresponding to an…

hep-ex2018★ 3 cited

Search for the rare decay of $ψ (3686) \to Λ_{c}^{+} p e^{+} e^{-} + c . c .$ at BESIII

BESIII collaboration

Based on a data sample of $(448.1 \pm 2.9) \times 1 0^{6} ψ (3686)$ decays collected with the BESIII experiment, a search for the flavor changing neutral current transition $ψ(3686)\righta…

hep-ex2017★ 6 cited

Branching fraction measurement of $J / ψ \to K_{S} K_{L}$ and search for $J / ψ \to K_{S} K_{S}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +441

Using a sample of $1.31 \times 1 0^{9}$ $J / ψ$ events collected with the BESIII detector at the BEPCII collider, we study the decays of $J / ψ \to K_{S} K_{L}$ and $K_{S} K_{S}$ . The br…

hep-ex2015

Measurements of $π^{0} π^{0}$ production and form factors for $f_{0} (980)$ and $f_{2} (1270)$ in single-tag two-photon process

Qingnian Xu

We report a measurement of differential cross section of $π^{0}$ pair production in single-tag two-photon collisions. These results are obtained with 759 $f b^{- 1}$ of the data colle…

hep-ex2014★ 10 cited

Search for the rare decays $J / ψ \to D_{s}^{-} ρ^{+}$ and $J / ψ \to D^{0} K^{* 0}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +376

A search for the rare decays of $J / ψ \to D_{s}^{-} ρ^{+} + c . c .$ and $J / ψ \to D^{0} K^{* 0} + c . c .$ is performed with a data sample of 225.3 million $J / ψ$ events co…

hep-ex2013★ 27 cited

Measurement of $η^{'} \to π^{+} π^{-} e^{+} e^{-}$ and $η^{'} \to π^{+} π^{-} μ^{+} μ^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +361

Based on a sample of 225.3 million J/ψevents accumulated with the BESIII detector at the BEPCII, the decays of η' to pi+pi-l+l- are studied via J/ψto γη'. A clear η' signal is obse…

hep-ex2013★ 60 cited

Partial wave analysis of $J / ψ \to γ η η$

M. Ablikim, M. N. Achasov, O. Albayrak +358

Based on a sample of $2.25 \times 1 0^{8}$ $J / ψ$ events collected with the BESIII detector at BEPCII, a full partial wave analysis on $J / ψ \to γ η η$ was performed using the relativistic…

hep-ex2012★ 11 cited

Search for $η$ and $η^{'} \to π^{+} e^{-} ν ˉ_{e} + c . c .$ decays in $\jpsi \to ϕη$ and $ϕ η^{'}$

M. Ablikim, M. N. Achasov, O. Albayrak +362

Using a sample of 225.3 million $\jpsi$ events collected with the BESIII detector at the BEPCII $e^{+} e^{-}$ collider in 2009, searches for the decays of $η$ and $η^\prime\toπ^+ e^- \b…

hep-ex2012★ 24 cited

Measurements of Baryon Pair Decays of $χ_{c J}$ Mesons

M. Ablikim, M. N. Achasov, O. Albayrak +348

Using 106 $\times 1 0^{6}$ $ψ^{'}$ decays collected with the BESIII detector at the BEPCII, three decays of $χ_{c J}$ ( $J = 0, 1, 2$ ) with baryon pairs ($\llb$, $\ssb$, $\SSB$) in t…

hep-ex2011★ 24 cited

Measurement of the $W \to e ν$ and $Z / γ^{*} \to e^{+} e^{-}$ Production Cross Sections at Mid-rapidity in Proton-Proton Collisions at $s$ = 500 GeV

STAR Collaboration, G. Agakishiev, M. M. Aggarwal +346

We report measurements of the charge-separated $W^{+ (-)} \to e^{+ (-)} + ν_{e} (ν ˉ_{e})$ and $Z / γ^{*} \to e^{+} e^{-}$ production cross sections at mid-rapidity in proton-proton collisions a…

hep-ex2009★ 24 cited

Measurement of D* Mesons in Jets from p+p Collisions at sqrt{s} = 200 GeV

The STAR Collaboration, B. I. Abelev

We report the measurement of charged $D^{*}$ mesons in inclusive jets produced in proton-proton collisions at a center of mass energy $s$ = 200 GeV with the STAR experiment at…

Search for CP violation and observation of P violation in Λb0​→pπ−π+π− decays

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

Observation of the W-Annihilation Decay Ds+​→ωπ+ and Evidence for Ds+​→ωK+

Search for the rare decay of ψ(3686)→Λc+​p​e+e−+c.c. at BESIII

Branching fraction measurement of J/ψ→KS​KL​ and search for J/ψ→KS​KS​

Measurements of π0π0 production and form factors for f0​(980) and f2​(1270) in single-tag two-photon process

Search for the rare decays J/ψ→Ds−​ρ+ and J/ψ→D0K∗0

Measurement of η′→π+π−e+e− and η′→π+π−μ+μ−

Partial wave analysis of J/ψ→γηη

Search for η and η′→π+e−νˉe​+c.c. decays in $\jpsi \to ϕη$ and ϕη′

Measurements of Baryon Pair Decays of χcJ​ Mesons

Measurement of the W→eν and Z/γ∗→e+e− Production Cross Sections at Mid-rapidity in Proton-Proton Collisions at s​ = 500 GeV