Yongchao Yu

collaborators

30 papers

hep-ex2026

Observation of the $χ_{c J}$ decays into $p K^{-} Λ ˉ η + c.c.$

BESIII Collaboration, M. Ablikim, M. N. Achasov +780

By analyzing $(2712.4 \pm 14.3) \times 1 0^{6}$ $ψ (3686)$ events collected with the BESIII detector operating at the BEPCII collider, the decays $χ_{cJ} \to pK^{-}\barΛη+ \mathrm{c.…

hep-ex2026

Observation and branching fraction measurements of $J / ψ \to p p ˉ K_{S}^{0} K_{S}^{0}$ and $ψ (3686) \to p p ˉ K_{S}^{0} K_{S}^{0}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +765

Using $(10.087 \pm 0.044) \times 1 0^{9}$ $J / ψ$ events and $(2.712 \pm 0.014) \times 1 0^{9}$ $ψ (3686)$ events collected by the BESIII detector operating at the BEPCII collider, we report the fi…

hep-ex2026

Study of the $e^{+} e^{-} \to π^{+} π^{-} D_{s}^{+} D_{s}^{-}$ process from $s$ = 4.42 to 4.95 GeV at BESIII

BESIII Collaboration, M. Ablikim, M. N. Achasov +782

Based on $8.5 fb^{- 1}$ of $e^{+} e^{-}$ collision data collected at center-of-mass energies between 4.42 and 4.95 GeV with the BESIII detector at the BEPCII storage ring, we inves…

hep-ex2026

Measurement of Born cross sections for $e^{+} e^{-} \to p p ˉ$ at $s = 3.510 - 4.946$ GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +758

We report a measurement of the Born cross section and the effective form factor for the $e^{+} e^{-} \to p p ˉ$ reaction at 47 center-of-mass energies between 3.510 and 4.946 GeV. The…

hep-ex2026

Observation of $ψ (3770) \to p p ˉ$ and Measurement of Electromagnetic Form Factors of Proton at $s = 3.510 - 4.946$ GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +758

We search for possible charmonium(-like) states decaying into the $p p ˉ$ final state by studying the Born cross sections of the $e^{+} e^{-} \to p p ˉ$ reaction, and we determine…

hep-ex2026

Evidence of $ψ (3770) \to π^{0} J / ψ$

BESIII Collaboration, M. Ablikim, M. N. Achasov +766

We report the first evidence for the hadronic transition $ψ (3770) \to π^{0} J / ψ$ using a data sample of $20.3 fb^{- 1}$ collected at $s = 3.773$ ~GeV with the BESIII de…

hep-ex2026

Strong and electromagnetic amplitudes, direct $C P$ and isospin asymmetries in the decays $J / ψ \to K_{S}^{0} K^{+} π^{-} + c . c .$

BESIII Collaboration, M. Ablikim, M. N. Achasov +766

Using $e^{+} e^{-}$ annihilation data collected at 26 center-of-mass energy points between 3000.00 and $3119.88 MeV$ with the BESIII detector, corresponding to a total integrated…

hep-ex2026

Unexpected large relative strong phase and search for isospin breaking and $C P$ asymmetries in $J/ψ\to K^*(892)\bar K

BESIII Collaboration, M. Ablikim, M. N. Achasov +766

Using a direct scan of 26 energy points near the $J / ψ$ resonance, we perform the first measurement of the relative phase $ϕ_{γ, 3 g}$ between the strong and electromagnetic amplitud…

hep-ex2026

Measurement of Born Cross Sections for $e^{+} e^{-} \to K^{+} Ξ^{0} Σ ˉ^{-}$ at $s = 3.51 - 4.95$ GeV and Observation of $ψ (3770) \to K^{+} Ξ^{0} Σ ˉ^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +771

Using 44.55 fb $^{- 1}$ of $e^{+} e^{-}$ collision data collected by the BESIII detector at the BEPCII collider, we report the first measurement of the Born cross sections for the $e^+e^-…

hep-ex2026

Observation of $η_{c} (1 S) \to Σ^{0} Σ ˉ^{0}$ and search for $h_{c} (1 P) \to Σ^{0} Σ ˉ^{0}$ via $ψ (3686)$ transitions

BESIII Collaboration, M. Ablikim, M. N. Achasov +776

Using $(2712.4 \pm 14.3) \times 1 0^{6} ψ (3686)$ events collected by the BESIII detector operating at the BEPCII collider, the hadronic decay $η_{c} \to Σ^{0} Σ^{0} ˉ$ is observed fo…

hep-ex2026

Study of $ϕ \to K K ˉ$ in the amplitude analysis of $D^{+} \to K_{S}^{0} K_{L}^{0} π^{+}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +772

We present the first amplitude analysis and branching fraction measurement of $D^{+} \to K_{S}^{0} K_{L}^{0} π^{+}$ decay. The analysis uses a dataset corresponding to an int…

hep-ex2026

Measurement of the Absolute Branching Fraction of Xi(1530)^{-} to (Xi pi)^{-} and Updated Measurement of the Branching Fraction of psi(3686) to anti-Xi^{+} Xi(1530)^{-} + c.c

BESIII Collaboration, M. Ablikim, M. N. Achasov +758

Based on (2712.4+-14.3)*10^{6} psi(3686) events collected with the BESIII detector, the decays Xi(1530)^{-} to Xi^{0} pi^{-} and Xi(1530)^{-} to Xi^{-} pi^{0} are investigated join…

hep-ex2026

Observation of the $X (2370)$ in $J / ψ \to γ K_{S}^{0} K_{S}^{0} π^{0}$ and $J / ψ \to γ π^{0} π^{0} η$

BESIII Collaboration, M. Ablikim, M. N. Achasov +769

Based on $(10087 \pm 44) \times 1 0^{6}$ $J / ψ$ events collected with the BESIII detector, the $J / ψ \to γ K_{S}^{0} K_{S}^{0} π^{0}$ and $J / ψ \to γ π^{0} π^{0} η$ processes are stu…

hep-ex2026

Observation of a Doubly-strange Hyperon $Ξ (1720)$ in $J / ψ \to K^{-} Σ^{0} Ξ ˉ^{+} + c . c .$

BESIII Collaboration, M. Ablikim, M. N. Achasov +758

Based on a sample of $(10087 \pm 44) \times 1 0^{6}$ $J / ψ$ events collected with the BESIII detector at BEPCII, we report the first observation of the decay $J/ψ\rightarrow K^- Σ^0 \b…

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 CKM angle $γ$ with a novel approach

The BESIII, LHCb Collaborations, : +1903

A measurement of the CKM angle $γ$ is performed by applying a novel, unbinned, model-independent approach to datasets of electron-positron collisions collected by the BESIII experi…

hep-ex2026

Measurement of the CKM angle $γ$ in $B^{\pm} \to D (\to K_{S}^{0} h^{' +} h^{' -}) h^{\pm}$ decays with a novel approach

The BESIII, LHCb Collaborations, : +1903

A measurement of the CKM angle $γ$ and related strong-phase parameters is performed using a novel, model-independent approach in ${B^{\pm}\rightarrow D(\rightarrow K^{0}_{\rm S} h^…

hep-ex2026

Measurements of branching fractions of $Λ_{c}^{+} \to Σ^{0} K_{S}^{0} π^{+}$ and $Λ_{c}^{+} \to Σ^{0} K_{S}^{0} K^{+}$

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

Based on a data sample corresponding to an integrated luminosity of 6.4~fb $^{- 1}$ of $e^{+} e^{-}$ annihilation and collected with the BESIII detector at 13 center-of-mass energy points…

hep-ex2026

Search for a massless particle beyond the Standard Model in the $Ξ^{0} \to Λ + invisible$ decay

BESIII Collaboration, M. Ablikim, M. N. Achasov +765

A search for a massless beyond-standard-model particle is performed in the decay $Ξ^{0} \to Λ + invisible$ using $(1.0087 \pm 0.0044) \times 1 0^{10}$ $J / ψ$ events collected with…

hep-ex2026

An improved measurement of $η^{'} \to e^{+} e^{-} ω$

BESIII Collaboration, M. Ablikim, M. N. Achasov +772

Using a sample of $(10087 \pm 44) \times 1 0^{6}$ $J / ψ$ events collected with the BESIII detector, an improved measurement of the decay $η^{'} \to e^{+} e^{-} ω$ , with $ω\…

hep-ex2026

Cross Section Measurements of $n ˉ p \to K^{+} K^{-} π^{+} (π^{0})$ via Antineutrons Produced by $J / ψ \to p π^{-} n ˉ$ Decays

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

Based on a novel method for producing antineutrons via $J / ψ$ decays, we report a study of $n ˉ p$ inelastic scattering into final states containing kaons. The analysis uses $(10…

hep-ex2026

First observation of the $η_{c} \to Ξ^{0} Ξ ˉ^{0}$ decay

BESIII Collaboration, M. Ablikim, M. N. Achasov +761

Using $(10087 \pm 44) \times 1 0^{6}$ $J / ψ$ events collected with the BESIII detector at the BEPCII collider, we report the first observation of the decay $η_{c} \to Ξ^{0} Ξ ˉ^{0}$ . T…

Observation of the χcJ​ decays into pK−Λˉη+c.c.

Observation and branching fraction measurements of J/ψ→ppˉ​KS0​KS0​ and ψ(3686)→ppˉ​KS0​KS0​

Study of the e+e−→π+π−Ds+​Ds−​ process from s​ = 4.42 to 4.95 GeV at BESIII

Measurement of Born cross sections for e+e−→ppˉ​ at s​=3.510−4.946 GeV

Observation of ψ(3770)→ppˉ​ and Measurement of Electromagnetic Form Factors of Proton at s​=3.510−4.946 GeV

Evidence of ψ(3770)→π0J/ψ

Strong and electromagnetic amplitudes, direct CP and isospin asymmetries in the decays J/ψ→KS0​K+π−+c.c.

Unexpected large relative strong phase and search for isospin breaking and CP asymmetries in $J/ψ\to K^*(892)\bar K

Measurement of Born Cross Sections for e+e−→K+Ξ0Σˉ− at s​=3.51−4.95 GeV and Observation of ψ(3770)→K+Ξ0Σˉ−

Observation of ηc​(1S)→Σ0Σˉ0 and search for hc​(1P)→Σ0Σˉ0 via ψ(3686) transitions

Study of ϕ→KKˉ in the amplitude analysis of D+→KS0​KL0​π+

Measurement of the Absolute Branching Fraction of Xi(1530)^{-} to (Xi pi)^{-} and Updated Measurement of the Branching Fraction of psi(3686) to anti-Xi^{+} Xi(1530)^{-} + c.c

Observation of the X(2370) in J/ψ→γKS0​KS0​π0 and J/ψ→γπ0π0η

Observation of a Doubly-strange Hyperon Ξ(1720) in J/ψ→K−Σ0Ξˉ++c.c.

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 CKM angle γ with a novel approach

Measurement of the CKM angle γ in B±→D(→KS0​h′+h′−)h± decays with a novel approach

Measurements of branching fractions of Λc+​→Σ0KS0​π+ and Λc+​→Σ0KS0​K+

Search for a massless particle beyond the Standard Model in the Ξ0→Λ+invisible decay

An improved measurement of η′→e+e−ω

Cross Section Measurements of nˉp→K+K−π+(π0) via Antineutrons Produced by J/ψ→pπ−nˉ Decays

First observation of the ηc​→Ξ0Ξˉ0 decay

Observation of the $χ_{c J}$ decays into $p K^{-} Λ ˉ η + c.c.$

Observation and branching fraction measurements of $J / ψ \to p p ˉ K_{S}^{0} K_{S}^{0}$ and $ψ (3686) \to p p ˉ K_{S}^{0} K_{S}^{0}$

Study of the $e^{+} e^{-} \to π^{+} π^{-} D_{s}^{+} D_{s}^{-}$ process from $s$ = 4.42 to 4.95 GeV at BESIII

Measurement of Born cross sections for $e^{+} e^{-} \to p p ˉ$ at $s = 3.510 - 4.946$ GeV

Observation of $ψ (3770) \to p p ˉ$ and Measurement of Electromagnetic Form Factors of Proton at $s = 3.510 - 4.946$ GeV

Evidence of $ψ (3770) \to π^{0} J / ψ$

Strong and electromagnetic amplitudes, direct $C P$ and isospin asymmetries in the decays $J / ψ \to K_{S}^{0} K^{+} π^{-} + c . c .$

Unexpected large relative strong phase and search for isospin breaking and $C P$ asymmetries in $J/ψ\to K^*(892)\bar K

Measurement of Born Cross Sections for $e^{+} e^{-} \to K^{+} Ξ^{0} Σ ˉ^{-}$ at $s = 3.51 - 4.95$ GeV and Observation of $ψ (3770) \to K^{+} Ξ^{0} Σ ˉ^{-}$

Observation of $η_{c} (1 S) \to Σ^{0} Σ ˉ^{0}$ and search for $h_{c} (1 P) \to Σ^{0} Σ ˉ^{0}$ via $ψ (3686)$ transitions

Study of $ϕ \to K K ˉ$ in the amplitude analysis of $D^{+} \to K_{S}^{0} K_{L}^{0} π^{+}$

Observation of the $X (2370)$ in $J / ψ \to γ K_{S}^{0} K_{S}^{0} π^{0}$ and $J / ψ \to γ π^{0} π^{0} η$

Observation of a Doubly-strange Hyperon $Ξ (1720)$ in $J / ψ \to K^{-} Σ^{0} Ξ ˉ^{+} + c . c .$

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 CKM angle $γ$ with a novel approach

Measurement of the CKM angle $γ$ in $B^{\pm} \to D (\to K_{S}^{0} h^{' +} h^{' -}) h^{\pm}$ decays with a novel approach

Measurements of branching fractions of $Λ_{c}^{+} \to Σ^{0} K_{S}^{0} π^{+}$ and $Λ_{c}^{+} \to Σ^{0} K_{S}^{0} K^{+}$

Search for a massless particle beyond the Standard Model in the $Ξ^{0} \to Λ + invisible$ decay

An improved measurement of $η^{'} \to e^{+} e^{-} ω$

Cross Section Measurements of $n ˉ p \to K^{+} K^{-} π^{+} (π^{0})$ via Antineutrons Produced by $J / ψ \to p π^{-} n ˉ$ Decays

First observation of the $η_{c} \to Ξ^{0} Ξ ˉ^{0}$ decay