W. Qian

activity

20092026

most citedHeavy quarkonium: progress, puzzles, and opportunities

1.8k citations · 14.3k across the 236 of their papers we have counts for

collaborators

Showing 2020Show all

28 papers · 1 filter

hep-ex2020★ 13 cited

A novel method to test particle ordering and final state alignment in helicity formalism

Mengzhen Wang, Yi Jiang, Yinrui Liu +3

In this article, the importance is demonstrated of a proper choice of reference particles for decay angle definitions, when constructing partial-wave amplitude of multi-body decays…

hep-ex2020★ 40 cited

Measurements of the center-of-mass energies of $e^{+} e^{-}$ collisions at BESIII

BESIII Collaboration, M. Ablikim, M. N. Achasov +504

During the 2016-17 and 2018-19 running periods, the BESIII experiment collected 7.5~fb $^{- 1}$ of $e^{+} e^{-}$ collision data at center-of-mass energies ranging from 4.13 to 4.44 GeV. T…

hep-ex2020★ 8 cited

Measurement of the absolute branching fraction of $Λ_{c}^{+} \to p K_{S}^{0} η$ decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +490

Based on 586 $p b^{- 1}$ of $e^{+} e^{-}$ annihilation data collected at a center-of-mass energy of $s = 4.6 GeV$ with the BESIII detector at the BEPCII collider, the absol…

hep-ex2020★ 8 cited

Study of $e^{+} e^{-} \to 2 (p p ˉ)$ at center-of-mass energies between 4.0 and 4.6 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +487

Using data taken at 23 center-of-mass energies between 4.0 and 4.6 GeV with the BESIII detector at the BEPCII collider and with a total integrated luminosity of approximately $15$ …

hep-ex2020★ 2 cited

Search for the reaction $e^{+} e^{-} \to π^{+} π^{-} χ_{c J}$ and a charmonium-like structure decaying to $χ_{c J} π^{\pm}$ between 4.18 and 4.60 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +481

We search for the process $e^{+} e^{-} \to π^{+} π^{-} χ_{c J}$ ( $J = 0, 1, 2$ ) and for a charged charmonium-like state in the $π^{\pm} χ_{c J}$ subsystem. The search uses data sets…

hep-ex2020★ 37 cited

Amplitude analysis and branching fraction measurement of $D_{s}^{+} \to K^{+} K^{-} π^{+}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +484

We report an amplitude analysis and branching fraction measurement of $D_{s}^{+} \to K^{+} K^{-} π^{+}$ decay using a data sample of 3.19 $f b^{- 1}$ recorded with BESIII d…

hep-ex2020★ 5 cited

Measurement of the Branching Fraction of and Search for a CP-Violating Asymmetry in $η^{'} \to π^{+} π^{-} e^{+} e^{-}$ at BESIII

BESIII Collaboration, M. Ablikim, M. N. Achasov +487

The rare decay $η^{'} \to π^{+} π^{-} e^{+} e^{-}$ is studied using a sample of $1.3 \times 1 0^{9}$ $J / ψ$ events collected with the BESIII detector at BEPCII in 2009 and 2012. The branching fra…

hep-ex2020★ 46 cited

Observation of a resonant structure in $e^{+} e^{-} \to ω η$ and another in $e^{+} e^{-} \to ω π^{0}$ at center-of-mass energies between 2.00 and 3.08 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +485

Born cross sections for the processes $e^{+} e^{-} \to ω η$ and $e^{+} e^{-} \to ω π^{0}$ have been determined for center-of-mass energies between 2.00 and 3.08 GeV with the BESIII detector at…

hep-ex2020★ 7 cited

Measurements of $e^{+} e^{-} \to η_{c} π^{+} π^{-} π^{0}$ , $η_{c} π^{+} π^{-}$ and $η_{c} π^{0} γ$ at $s$ from 4.18 to 4.60\,GeV, and search for a $Z_{c}$ state close to the $D D ˉ$ threshold decaying to $η_{c} π$ at $s$ = 4.23 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +492

We study $η_{c}$ production at center-of-mass energies $s$ from 4.18 to 4.60 GeV in $e^{+} e^{-}$ annihilation data collected with the BESIII detector operating at the BEPCII…

hep-ex2020★ 42 cited

Measurement of cross-section for $e^{+} e^{-} \to Ξ^{-} Ξ ˉ^{+}$ near threshold at BESIII

BESIII Collaboration, M. Ablikim, M. N. Achasov +494

The Born cross-sections and effective form factors for process $e^{+} e^{-} \to Ξ^{-} Ξ ˉ^{+}$ are measured at eight center-of-mass energies between 2.644 and 3.080 GeV, using a total integr…

hep-ex2020★ 3 cited

Study of BESIII Trigger Efficiencies with the 2018 $J / ψ$ Data

BESIII Collaboration, M. Ablikim, M. N. Achasov +489

Using a dedicated data sample taken in 2018 on the $J / ψ$ peak, we perform a detailed study of the trigger efficiencies of the BESIII detector. The efficiencies are determined from…

hep-ex2020★ 7 cited

Observation of the decays $χ_{c J} \to Σ^{0} p ˉ K^{+} + c.c. (J = 0, 1, 2)$

BESIII Collaboration, M. Ablikim, M. N. Achasov +494

The decays $χ_{c J} \to Σ^{0} p ˉ K^{+} + c.c. (J = 0, 1, 2)$ are studied via the radiative transition $ψ (3686) \to γ χ_{c J}$ based on a data sample of $(448.1 \pm 2.9)\times10^{6}…

hep-ex2020★ 30 cited

Erratum to "Measurement of the $e^{+} e^{-} \to π^{+} π^{-}$ cross section between 600 and 900 MeV using initial state radiation"

BESIII Collaboration, M. Ablikim, M. N. Achasov +489

In Phys. Lett. B 753, 629-638 (2016) [arXiv:1507.08188] the BESIII collaboration published a cross section measurement of the process $e^{+} e^{-} \to π^{+} π^{-}$ in the energy range betwee…

hep-ex2020

Measurement of Singly Cabibbo-Suppressed Decays $D \to ω π π$

BESIII Collaboration, M. Ablikim, M. N. Achasov +486

Using 2.93 fb $^{- 1}$ of $e^{+} e^{-}$ collision data taken at a center-of-mass energy of 3.773 GeV by the BESIII detector at the BEPCII, we measure the branching fractions of the si…

hep-ex2020★ 14 cited

Search for the semileptonic decay $D^{0 (+)} \to b_{1} (1235)^{- (0)} e^{+} ν_{e}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +491

Using $2.93 fb^{- 1}$ of $e^{+} e^{-}$ annihilation data collected at a center-of-mass energy $s = 3.773$ GeV with the BESIII detector operating at the BEPCII collider, we…

hep-ex2020★ 8 cited

Study of CKM angle $γ$ sensitivity using flavor untagged $B_{s}^{0} \to D ~^{(*) 0} ϕ$ decays

D. Ao, D. Decamp, W. B. Qian +8

A sensitivity study for the measurement of the CKM angle $γ$ from $B_{s}^{0} \to D ~^{(*) 0} ϕ$ decays is performed using $D$ meson reconstructed in the quasi flavour-specif…

hep-ex2020★ 8 cited

Measurements of the absolute branching fractions of $D^{0 (+)} \to K K ˉ π π$ decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +492

Based on 2.93~fb $^{- 1}$ $e^{+} e^{-}$ collision data taken at center-of-mass energy of 3.773 GeV by the BESIII detector, we report the measurements of the absolute branching fractions o…

hep-ex2020★ 25 cited

Improved model-independent determination of the strong-phase difference between $D^{0}$ and $D ˉ^{0} \to K_{S, L}^{0} K^{+} K^{-}$ decays

M. Ablikim, M. N. Achasov, P. Adlarson +489

We present a measurement of the strong-phase difference between $D^{0}$ and $D ˉ^{0} \to K_{S, L}^{0} K^{+} K^{-}$ decays, performed through a study of quantum-entangled pairs…

hep-ex2020★ 28 cited

First branching fraction measurement of the suppressed decay $Ξ_{c}^{0} \to π^{-} Λ_{c}^{+}$

LHCb collaboration, R. Aaij, C. Abellán Beteta +963

The $Ξ_{c}^{0}$ baryon is unstable and usually decays into charmless final states by the $c \to s u d$ transition. It can, however, also disintegrate into a $π^{-}$ meson and a…

hep-ex2020★ 8 cited

Measurement of the Born Cross Sections for $e^{+} e^{-} \to D_{s}^{+} D_{s 1} (2460)^{-} + c . c .$ and $e^{+} e^{-} \to D_{s}^{*+} D_{s 1} (2460)^{-} + c . c .$

BESIII Collaboration, M. Ablikim, M. N. Achasov +484

The processes $e^{+} e^{-} \to D_{s}^{+} D_{s 1} (2460)^{-} + c . c .$ and $e^{+} e^{-} \to D_{s}^{*+} D_{s 1} (2460)^{-} + c . c .$ are studied for the first time using data samples collected with the BESIII d…

hep-ex2020★ 53 cited

Study of the $ψ_{2} (3823)$ and $χ_{c 1} (3872)$ states in $B^{+} \to (J ψ π^{+} π^{-}) K^{+}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +956

The decays $B^{+} \to J / ψ π^{+} π^{-} K^{+}$ are studied using a data set corresponding to an integrated luminosity of 9fb $^{- 1}$ collected with the LHCb detector in proton-proton co…

hep-ex2020★ 4 cited

Measurement of the absolute branching fraction of the inclusive decay $Λ_{c}^{+} \to K_{S}^{0} X$

M. Ablikim, M. N. Achasov, P. Adlarson +485

We report the first measurement of the absolute branching fraction of the inclusive decay $Λ_{c}^{+} \to K_{S}^{0} X$ . The analysis is performed using an $e^{+} e^{-}$ collision data sample corr…

hep-ex2020★ 6 cited

First Measurements of $χ_{c J} \to Σ^{-} Σ ˉ^{+} (J = 0, 1, 2)$ Decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +484

We measured the branching fractions of the decays $χ_{c J} \to Σ^{-} Σ ˉ^{+}$ for the first time using the final states $n n ˉ π^{+} π^{-}$ . The data sample exploited here is $448.1…

hep-ex2020★ 69 cited

$Σ^{+}$ and $Σ ˉ^{-}$ polarization in the $J / ψ$ and $ψ (3686)$ decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +484

From $1310.6 \times 1 0^{6}$ $J / ψ$ and $448.1 \times 1 0^{6}$ $ψ (3686)$ events collected with the BESIII experiment, we report the first observation of $Σ^{+}$ and $Σ ˉ^{-}$ spin polar…

A novel method to test particle ordering and final state alignment in helicity formalism

Measurements of the center-of-mass energies of e+e− collisions at BESIII

Measurement of the absolute branching fraction of Λc+​→pKS0​η decays

Study of e+e−→2(ppˉ​) at center-of-mass energies between 4.0 and 4.6 GeV

Search for the reaction e+e−→π+π−χcJ​ and a charmonium-like structure decaying to χcJ​π± between 4.18 and 4.60 GeV

Amplitude analysis and branching fraction measurement of Ds+​→K+K−π+

Measurement of the Branching Fraction of and Search for a CP-Violating Asymmetry in η′→π+π−e+e− at BESIII

Observation of a resonant structure in e+e−→ωη and another in e+e−→ωπ0 at center-of-mass energies between 2.00 and 3.08 GeV

Measurements of e+e−→ηc​π+π−π0, ηc​π+π− and ηc​π0γ at s​ from 4.18 to 4.60\,GeV, and search for a Zc​ state close to the DDˉ threshold decaying to ηc​π at s​ = 4.23 GeV

Measurement of cross-section for e+e−→Ξ−Ξˉ+ near threshold at BESIII

Study of BESIII Trigger Efficiencies with the 2018 J/ψ Data

Observation of the decays χcJ​→Σ0pˉ​K++c.c. (J=0,1,2)

Erratum to "Measurement of the e+e−→π+π− cross section between 600 and 900 MeV using initial state radiation"

Measurement of Singly Cabibbo-Suppressed Decays D→ωππ

Search for the semileptonic decay D0(+)→b1​(1235)−(0)e+νe​

Study of CKM angle γ sensitivity using flavor untagged Bs0​→D~(∗)0ϕ decays

Measurements of the absolute branching fractions of D0(+)→KKˉππ decays

Improved model-independent determination of the strong-phase difference between D0 and Dˉ0→KS,L0​K+K− decays

First branching fraction measurement of the suppressed decay Ξc0​→π−Λc+​

Measurement of the Born Cross Sections for e+e−→Ds+​Ds1​(2460)−+c.c. and e+e−→Ds∗+​Ds1​(2460)−+c.c.

Study of the ψ2​(3823) and χc1​(3872) states in B+→(Jψπ+π−)K+ decays

Measurement of the absolute branching fraction of the inclusive decay Λc+​→KS0​X

First Measurements of χcJ​→Σ−Σˉ+(J=0,1,2) Decays

Σ+ and Σˉ− polarization in the J/ψ and ψ(3686) decays

Measurements of the center-of-mass energies of $e^{+} e^{-}$ collisions at BESIII

Measurement of the absolute branching fraction of $Λ_{c}^{+} \to p K_{S}^{0} η$ decays

Study of $e^{+} e^{-} \to 2 (p p ˉ)$ at center-of-mass energies between 4.0 and 4.6 GeV

Search for the reaction $e^{+} e^{-} \to π^{+} π^{-} χ_{c J}$ and a charmonium-like structure decaying to $χ_{c J} π^{\pm}$ between 4.18 and 4.60 GeV

Amplitude analysis and branching fraction measurement of $D_{s}^{+} \to K^{+} K^{-} π^{+}$

Measurement of the Branching Fraction of and Search for a CP-Violating Asymmetry in $η^{'} \to π^{+} π^{-} e^{+} e^{-}$ at BESIII

Observation of a resonant structure in $e^{+} e^{-} \to ω η$ and another in $e^{+} e^{-} \to ω π^{0}$ at center-of-mass energies between 2.00 and 3.08 GeV

Measurements of $e^{+} e^{-} \to η_{c} π^{+} π^{-} π^{0}$ , $η_{c} π^{+} π^{-}$ and $η_{c} π^{0} γ$ at $s$ from 4.18 to 4.60\,GeV, and search for a $Z_{c}$ state close to the $D D ˉ$ threshold decaying to $η_{c} π$ at $s$ = 4.23 GeV

Measurement of cross-section for $e^{+} e^{-} \to Ξ^{-} Ξ ˉ^{+}$ near threshold at BESIII

Study of BESIII Trigger Efficiencies with the 2018 $J / ψ$ Data

Observation of the decays $χ_{c J} \to Σ^{0} p ˉ K^{+} + c.c. (J = 0, 1, 2)$

Erratum to "Measurement of the $e^{+} e^{-} \to π^{+} π^{-}$ cross section between 600 and 900 MeV using initial state radiation"

Measurement of Singly Cabibbo-Suppressed Decays $D \to ω π π$

Search for the semileptonic decay $D^{0 (+)} \to b_{1} (1235)^{- (0)} e^{+} ν_{e}$

Study of CKM angle $γ$ sensitivity using flavor untagged $B_{s}^{0} \to D ~^{(*) 0} ϕ$ decays

Measurements of the absolute branching fractions of $D^{0 (+)} \to K K ˉ π π$ decays

Improved model-independent determination of the strong-phase difference between $D^{0}$ and $D ˉ^{0} \to K_{S, L}^{0} K^{+} K^{-}$ decays

First branching fraction measurement of the suppressed decay $Ξ_{c}^{0} \to π^{-} Λ_{c}^{+}$

Measurement of the Born Cross Sections for $e^{+} e^{-} \to D_{s}^{+} D_{s 1} (2460)^{-} + c . c .$ and $e^{+} e^{-} \to D_{s}^{*+} D_{s 1} (2460)^{-} + c . c .$

Study of the $ψ_{2} (3823)$ and $χ_{c 1} (3872)$ states in $B^{+} \to (J ψ π^{+} π^{-}) K^{+}$ decays

Measurement of the absolute branching fraction of the inclusive decay $Λ_{c}^{+} \to K_{S}^{0} X$

First Measurements of $χ_{c J} \to Σ^{-} Σ ˉ^{+} (J = 0, 1, 2)$ Decays

$Σ^{+}$ and $Σ ˉ^{-}$ polarization in the $J / ψ$ and $ψ (3686)$ decays