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The study reports the first observation of the decay η_c → p p̄ η using a large ψ(3686) data set collected with the BESIII detector, and determines its branching fraction while acc…

#charmonium decays#ηc decay#branching fraction measurement#interference effects

hep-ex2026

Observation of the Exotic State $Ï_{1}(1600)$ in $Ï(2S)\rightarrowÎ³Ï_{c1},Ï_{c1}\rightarrowÏ^{+}Ï^{-}Î·'$

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

hep-ex2026

Evidence of $Ï(3770) \to Ï^{0}J/Ï$

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

hep-ex2026

Measurement of Born Cross Sections for $e^+e^-\toÎ£^-\barÎ£^+$ at $\sqrt{s}=3.51-4.95$ GeV and Observation of $Ï(3770)\toÎ£^-\barÎ£^+$

BESIII Collaboration, M. Ablikim, M. N. Achasov +704

hep-ex2026

Search for the charmonium weak decay $Ï(2S)\to D_s^-Ï^+ + c.c.$ and $Ï(2S)\to D_s^-Ï^+ + c.c.$

BESIII Collaboration, M. Ablikim, M. N. Achasov +720

hep-ex2026

Observation and branching fraction measurements of $J/Ï\to p \bar p K^0_S K^0_S$ and $Ï(3686) \to p \bar p K^0_S K^0_S$

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

hep-ex2026

Study of $Ï\to K\bar{K}$ in the amplitude analysis of $D^{+}\to K_{S}^{0}K_{L}^{0}Ï^{+}$

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

hep-ex2026

Measurement of the branching fractions of $Ï_{cJ} \to Ï^{+}Ï^{-}Ï^{0}Ï^{0}$ via $Ï(3686) \to Î³Ï_{cJ}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +762

hep-ex2026

Precise measurements of $D^0 \to K^-\ell^+Î½_\ell$ and $D^+ \to \bar K^0\ell^+Î½_\ell$ decays

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

hep-ex2026

Amplitude analysis and branching fraction measurement of $J/Ï\to Î\barÎ£^0Î·+\mathrm{c.c}$

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

hep-ex2026

First Experimental Constraint on the Scalar Current in the $D^{0(+)}\to \bar K\ell^+Î½_{\ell}$ Transition

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

hep-ex2026

Amplitude Analysis of the Isospin-Violating Decay $J/Ï\rightarrowÎ³Î·Ï^{0}$

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

hep-ex2026

Measurements of branching fractions of $Î_{c}^{+}\toÎ£^{0}K_{S}^{0}Ï^{+}$ and $Î_{c}^{+}\toÎ£^{0}K_{S}^{0}K^{+}$

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

hep-ex2026

Observation of $Î·_c(1S)\to Î£^0\bar Î£^0$ and search for $h_c(1P)\to Î£^0\bar Î£^0$ via $Ï(3686)$ transitions

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

Publications (52)

Cross Section Measurements of $\bar{n}p \rightarrow K^{+}K^{-}Ï^{+}(Ï^{0})$ via Antineutrons Produced by $J/Ï\to p Ï^{-} \bar{n}$ Decays

Search for a massless particle beyond the Standard Model in the $Î^0\toÎ+ \text{invisible}$ decay

First Measurement of the $D_s^+\rightarrow K^{*}(892)^0Î¼^+Î½_Î¼$ Decay, Study of Dynamics and Test of Lepton Universality with $D_s^+\rightarrow K^{*}(892)^0\ell^+Î½_{\ell}$ Decays

Search for the isospin-violating decays $\boldsymbol{Ï_{cJ}\toÎ\barÎ£^{0}+c.c.}$ and $\boldsymbol{Î·_{c}\toÎ\barÎ£^{0}+c.c.}$

Observation of the $Ï_{cJ}$ decays into $pK^{-}\barÎÎ·+\mathrm{c.c.}$

Observation of $Î(1530)^0$ Polarization and Determination of Its Electric and Magnetic Moments in $Ï(3686)\toÎ(1530)^0\barÎ(1530)^0$

Study of $\barÎ$-$p$ Annihilation into Light Mesons

An improved measurement of $Î·^\prime\rightarrow e^{+}e^{-}Ï$

First evidence for $D_s^+ \to f_1(1420) e^+Î½_e$ and search for $D_s^+ \to f_1(1285) e^+Î½_e$

Spatial symmetry constraint of charge-ordered kagome superconductor CsV$_3$Sb$_5$

Precision measurements of semleptonic decays $D^0 \to Ï^-\ell^+Î½_\ell$ and $D^+ \to Ï^0\ell^+Î½_\ell$ ($\ell =e,Î¼$)

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

Observation and branching fraction measurements of $Ï_{cJ}\to p \bar p K^0_S K^0_S$

Proof of principle for nucleon polarization measurement at BESIII

Search for the charged lepton flavor violating decay $Î·\to e^{\pm}Î¼^{\mp}$

Measurement of Born Cross Sections for $e^+e^- \to K^+Î^0\barÎ£^-$ at $\sqrt{s} = 3.51-4.95$ GeV and Observation of $Ï(3770) \to K^+Î^0\barÎ£^-$

Precise measurement of the CKM angle $Î³$ with a novel approach

Precision Measurement of Decay Dynamics in $D^{0(+)}\to Ï^{-(0)}\ell^+Î½_\ell$

Observation of $Ï(3770)\to p\bar p$ and Measurement of Electromagnetic Form Factors of Proton at $\sqrt{s} = 3.510-4.946$ GeV

Search for the radiative decay $D^+_s \to Î³K^*(892)^+$

Precision Studies and Searches for CP Asymmetries in the Inclusive Decay $Î_{c}^{+}\to ÎX$

Strong and electromagnetic amplitudes, direct $CP$ and isospin asymmetries in the decays $J/Ï\to K^0_SK^+Ï^-+c.c.$

Observation of $Î^+_c\to nÏ^+Î·$ and search for $Î^+_c\to na_0(980)^+$

Observation of $D_s^+ \to a_0(980)^+f_0(500)$ in the Amplitude Analysis of $D_s^+ \to Ï^+ Ï^0 Ï^0 Î·$

First observation of the $Î·_{c}\toÎ^{0} \barÎ^{0}$ decay

Observation of $\barÎp\to K^{+}Ï^{+}Ï^{-}Ï^{0}$ and $\barÎp\to K^{+}Ï^{+}Ï^{-}2Ï^{0}$

Measurement of Born Cross Section for $e^+e^-\to K_S^0\barÎ^+Î£^-+\rm{c.c.}$ at $\sqrt{s} = 3.51-4.95$ GeV

Search for $Ï_0(4360)\rightarrow Î·Ï(2S)$ through the process $e^+e^- \rightarrow Î·Î·Ï(2S)$

Updated measurement of the branching fraction of $D_s^+ \to Ï^+ Î½_Ï$

Observation of a Doubly-strange Hyperon $Î(1720)$ in $J/Ï\rightarrow{}K^{-}Î£^0\barÎ^{+}+c.c.$

First Observation of \boldmath{$D^+ \to a_0(980)Ï$ and $D^+ \to a_0(980)^+ f_0(500)$} in \boldmath{$D^+ \to Ï^+Ï^+Ï^-Î·$ and $D^+ \to Ï^+Ï^0Ï^0Î·$} Decays

First Measurement of the Relative Phase between Proton Psionic Form Factors

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

Observation of the $X(2370)$ in $J/Ï\rightarrowÎ³K^{0}_{S}K^{0}_{S}Ï^{0}$ and $J/Ï\rightarrowÎ³Ï^{0}Ï^{0}Î·$

Amplitude analysis and branching fraction measurement of the decay $D^0 \to K^+K^-Ï^0Ï^0$

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

Study of the $e^+e^-\to Ï^+Ï^-D_s^+D_s^-$ process from $\sqrt{s}$ = 4.42 to 4.95 GeV at BESIII

Measurement of the CKM angle $Î³$ in $B^{\pm} \rightarrow D(\rightarrow K^{0}_{\rm S} h^{\prime+}h^{\prime-})h^{\pm}$ decays with a novel approach

Observation of $Î·_{c} \to p\bar{p}Î·$ via $Ï(3686) \to Î³p\bar{p}Î·$

Observation of the Exotic State $Ï_{1}(1600)$ in $Ï(2S)\rightarrowÎ³Ï_{c1},Ï_{c1}\rightarrowÏ^{+}Ï^{-}Î·'$

Evidence of $Ï(3770) \to Ï^{0}J/Ï$

Measurement of Born Cross Sections for $e^+e^-\toÎ£^-\barÎ£^+$ at $\sqrt{s}=3.51-4.95$ GeV and Observation of $Ï(3770)\toÎ£^-\barÎ£^+$

Search for the charmonium weak decay $Ï(2S)\to D_s^-Ï^+ + c.c.$ and $Ï(2S)\to D_s^-Ï^+ + c.c.$

Observation and branching fraction measurements of $J/Ï\to p \bar p K^0_S K^0_S$ and $Ï(3686) \to p \bar p K^0_S K^0_S$

Study of $Ï\to K\bar{K}$ in the amplitude analysis of $D^{+}\to K_{S}^{0}K_{L}^{0}Ï^{+}$

Measurement of the branching fractions of $Ï_{cJ} \to Ï^{+}Ï^{-}Ï^{0}Ï^{0}$ via $Ï(3686) \to Î³Ï_{cJ}$

Precise measurements of $D^0 \to K^-\ell^+Î½_\ell$ and $D^+ \to \bar K^0\ell^+Î½_\ell$ decays

Amplitude analysis and branching fraction measurement of $J/Ï\to Î\barÎ£^0Î·+\mathrm{c.c}$

First Experimental Constraint on the Scalar Current in the $D^{0(+)}\to \bar K\ell^+Î½_{\ell}$ Transition

Amplitude Analysis of the Isospin-Violating Decay $J/Ï\rightarrowÎ³Î·Ï^{0}$

Measurements of branching fractions of $Î_{c}^{+}\toÎ£^{0}K_{S}^{0}Ï^{+}$ and $Î_{c}^{+}\toÎ£^{0}K_{S}^{0}K^{+}$

Observation of $Î·_c(1S)\to Î£^0\bar Î£^0$ and search for $h_c(1P)\to Î£^0\bar Î£^0$ via $Ï(3686)$ transitions

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

Search for a massless particle beyond the Standard Model in the $Î^0\toÎ+ \text{invisible}$ decay

First Measurement of the $D_s^+\rightarrow K^{}(892)^0Î¼^+Î½_Î¼$ Decay, Study of Dynamics and Test of Lepton Universality with $D_s^+\rightarrow K^{}(892)^0\ell^+Î½_{\ell}$ Decays

Search for the isospin-violating decays $\boldsymbol{Ï_{cJ}\toÎ\barÎ£^{0}+c.c.}$ and $\boldsymbol{Î·_{c}\toÎ\barÎ£^{0}+c.c.}$

Observation of the $Ï_{cJ}$ decays into $pK^{-}\barÎÎ·+\mathrm{c.c.}$

Observation of $Î(1530)^0$ Polarization and Determination of Its Electric and Magnetic Moments in $Ï(3686)\toÎ(1530)^0\barÎ(1530)^0$

Study of $\barÎ$-$p$ Annihilation into Light Mesons

An improved measurement of $Î·^\prime\rightarrow e^{+}e^{-}Ï$

Precision measurements of semleptonic decays $D^0 \to Ï^-\ell^+Î½_\ell$ and $D^+ \to Ï^0\ell^+Î½_\ell$ ($\ell =e,Î¼$)

Observation and branching fraction measurements of $Ï_{cJ}\to p \bar p K^0_S K^0_S$

Measurement of Born Cross Sections for $e^+e^- \to K^+Î^0\barÎ£^-$ at $\sqrt{s} = 3.51-4.95$ GeV and Observation of $Ï(3770) \to K^+Î^0\barÎ£^-$

Precision Measurement of Decay Dynamics in $D^{0(+)}\to Ï^{-(0)}\ell^+Î½_\ell$

Observation of $Ï(3770)\to p\bar p$ and Measurement of Electromagnetic Form Factors of Proton at $\sqrt{s} = 3.510-4.946$ GeV

Precision Studies and Searches for CP Asymmetries in the Inclusive Decay $Î_{c}^{+}\to ÎX$

Strong and electromagnetic amplitudes, direct $CP$ and isospin asymmetries in the decays $J/Ï\to K^0_SK^+Ï^-+c.c.$

Observation of $Î^+_c\to nÏ^+Î·$ and search for $Î^+_c\to na_0(980)^+$

Observation of $D_s^+ \to a_0(980)^+f_0(500)$ in the Amplitude Analysis of $D_s^+ \to Ï^+ Ï^0 Ï^0 Î·$

First observation of the $Î·_{c}\toÎ^{0} \barÎ^{0}$ decay

Observation of $\barÎp\to K^{+}Ï^{+}Ï^{-}Ï^{0}$ and $\barÎp\to K^{+}Ï^{+}Ï^{-}2Ï^{0}$

Measurement of Born Cross Section for $e^+e^-\to K_S^0\barÎ^+Î£^-+\rm{c.c.}$ at $\sqrt{s} = 3.51-4.95$ GeV

Search for $Ï_0(4360)\rightarrow Î·Ï(2S)$ through the process $e^+e^- \rightarrow Î·Î·Ï(2S)$

Updated measurement of the branching fraction of $D_s^+ \to Ï^+ Î½_Ï$

Observation of a Doubly-strange Hyperon $Î(1720)$ in $J/Ï\rightarrow{}K^{-}Î£^0\barÎ^{+}+c.c.$

First Observation of \boldmath{$D^+ \to a_0(980)Ï$ and $D^+ \to a_0(980)^+ f_0(500)$} in \boldmath{$D^+ \to Ï^+Ï^+Ï^-Î·$ and $D^+ \to Ï^+Ï^0Ï^0Î·$} Decays

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

Observation of the $X(2370)$ in $J/Ï\rightarrowÎ³K^{0}_{S}K^{0}_{S}Ï^{0}$ and $J/Ï\rightarrowÎ³Ï^{0}Ï^{0}Î·$

Amplitude analysis and branching fraction measurement of the decay $D^0 \to K^+K^-Ï^0Ï^0$

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

Observation of $Î·_{c} \to p\bar{p}Î·$ via $Ï(3686) \to Î³p\bar{p}Î·$

Observation of the Exotic State $Ï_{1}(1600)$ in $Ï(2S)\rightarrowÎ³Ï_{c1},Ï_{c1}\rightarrowÏ^{+}Ï^{-}Î·'$

Evidence of $Ï(3770) \to Ï^{0}J/Ï$

Measurement of Born Cross Sections for $e^+e^-\toÎ£^-\barÎ£^+$ at $\sqrt{s}=3.51-4.95$ GeV and Observation of $Ï(3770)\toÎ£^-\barÎ£^+$

Search for the charmonium weak decay $Ï(2S)\to D_s^-Ï^+ + c.c.$ and $Ï(2S)\to D_s^-Ï^+ + c.c.$

Observation and branching fraction measurements of $J/Ï\to p \bar p K^0_S K^0_S$ and $Ï(3686) \to p \bar p K^0_S K^0_S$

Study of $Ï\to K\bar{K}$ in the amplitude analysis of $D^{+}\to K_{S}^{0}K_{L}^{0}Ï^{+}$

Measurement of the branching fractions of $Ï_{cJ} \to Ï^{+}Ï^{-}Ï^{0}Ï^{0}$ via $Ï(3686) \to Î³Ï_{cJ}$

Amplitude analysis and branching fraction measurement of $J/Ï\to Î\barÎ£^0Î·+\mathrm{c.c}$

Amplitude Analysis of the Isospin-Violating Decay $J/Ï\rightarrowÎ³Î·Ï^{0}$

Measurements of branching fractions of $Î_{c}^{+}\toÎ£^{0}K_{S}^{0}Ï^{+}$ and $Î_{c}^{+}\toÎ£^{0}K_{S}^{0}K^{+}$

Observation of $Î·_c(1S)\to Î£^0\bar Î£^0$ and search for $h_c(1P)\to Î£^0\bar Î£^0$ via $Ï(3686)$ transitions