Search for a dark baryon in the $\hat{I}{ž}^{-}\to \ddot{I}{€}^{-}+\mathrm{invisible}$ decay

BESIII Collaboration, M. Ablikim, M. N. Achasov +689

A search for a dark baryon is performed for the first time in the two-body decay $\hat{I}{ž}^{-}\to \ddot{I}{€}^{-}+\mathrm{invisible}$ using $(10.087\pm 0.044)\times 10^9$ $J/\ddot{I}ˆ$ events collected…

Strong and weak $CP$ tests in sequential decays of polarized $\hat{I}{\pounds }^0$ hyperons

BESIII Collaboration, M. Ablikim, M. N. Achasov +650

The $J/\ddot{I}ˆ,\ddot{I}ˆ(3686)\to \hat{I}{\pounds }^0\bar{\hat{I}}{\pounds }^0$ processes and subsequent decays are studied using the world's largest $J/\ddot{I}ˆ$ and $\ddot{I}ˆ(3686)$ data samples collected with the BESIII detector…

Search for the radiative leptonic decay $D^{+}\to {\hat{I}}^3{e}^{+}\hat{I}{½}_e$ using Deep Learning

BESIII Collaboration, M. Ablikim, M. N. Achasov +678

Using 20.3$\mathrm{f}{\mathrm{b}}^{-1}$ of $e^{+}{e}^{-}$ annihilation data collected at a center-of-mass energy of 3.773$\mathrm{GeV}$ with the BESIII detector, we report an improved search for the radiat…

Improved measurement of the branching fraction of $h_c\to {\hat{I}}^3\hat{I}{\cdot }^{\prime }/\hat{I}\cdot$ and search for $h_c\to {\hat{I}}^3\ddot{I}{€}^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +651

The processes $h_c\to {\hat{I}}^{3}P(P=\hat{I}{\cdot }^{\prime },\hat{I}\cdot ,\ddot{I}{€}^0)$ are studied with a sample of $(27.12\pm 0.14)\times 10^8$ $\ddot{I}ˆ(3686)$ events collected by the BESIII detector at the BEPCII collid…

Measurement of the branching fraction of $D^{+}\to \ddot{I}{„}^{+}\hat{I}{½}_{\ddot{I}}„$

BESIII Collaboration, M. Ablikim, M. N. Achasov +654

By analyzing $e^{+}{e}^{-}$ collision data with an integrated luminosity of 7.9~fb${}^{-1}$ collected with the BESIII detector at the center-of-mass energy of 3.773~GeV, the branching…

Observation of $D^{+}\to \hat{I}{\cdot }^{\prime }\hat{I}{¼}^{+}\hat{I}{½}_{\hat{I}}¼$ and First Study of $D^{+}\to \hat{I}{\cdot }^{\prime }{\ell }^{+}\hat{I}{½}_{\ell }$ Decay Dynamics

BESIII Collaboration, M. Ablikim, M. N. Achasov +648

Using $20.3\mathrm{f}{\mathrm{b}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at the center-of-mass energy 3.773\,GeV with the BESIII detector, we report the first observation of the semileptonic…

Search for $K_S^0$ invisible decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +650

Based on $(1.0087\pm 0.0044)\times 10^{10}$ $J/\ddot{I}ˆ$ events collected with the BESIII detector at the BEPCII $e^{+}{e}^{-}$ storage ring, we search for $K_S^0$ invisible decays via the $…

Observation of $\ddot{I}ˆ(3686)\to 3\ddot{I}•$

BESIII Collaboration, M. Ablikim, M. N. Achasov +651

Using $(2.712\pm 0.014)\times 10^9$ $\ddot{I}ˆ(3686)$ events collected by the BESIII detector operating at the BEPCII collider, we report the first observation of $\ddot{I}ˆ(3686)\to 3\ddot{I}•$ decay w…

Updated model-independent measurement of the strong-phase differences between $D^0$ and ${\bar{D}}^0\to K_{S/L}^0\ddot{I}{€}^{+}\ddot{I}{€}^{-}$ decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +688

The strong-phase differences between $D^0\to K_{S/L}^0\ddot{I}{€}^{+}\ddot{I}{€}^{-}$ and ${\bar{D}}^0\to K_{S/L}^0\ddot{I}{€}^{+}\ddot{I}{€}^{-}$ decays are one of the most important inputs in measuring the $CP$ violating a…

Observation of $\ddot{I}{‡}_{cJ}\to 3K_S^0{K}^{\pm }\ddot{I}{€}^{\mp }$

BESIII Collaboration, M. Ablikim, M. N. Achasov +677

By analyzing $(2712.4\pm 14.3)\times 10^6$ $\ddot{I}ˆ(3686)$ events collected with the BESIII detector operating at the BEPCII collider, the decays $\ddot{I}{‡}_{c0,1,2}\to 3K_S^0{K}^{\pm }\ddot{I}{€}^{\mp }$ are o…

First measurement of $\hat{I}{\pounds }^{+}n\to \hat{I}›p$ and $\hat{I}{\pounds }^{+}n\to \hat{I}{\pounds }^{0}p$ cross sections via $\hat{I}{\pounds }^{+}$-nucleus scattering at an electron-positron collider

BESIII Collaboration, M. Ablikim, M. N. Achasov +678

Using $(1.0087\pm 0.0044)\times 10^{10}$ $J/\ddot{I}ˆ$ events collected with the BESIII detector at the BEPCII storage ring, the reactions $\hat{I}{\pounds }^{+}n\to \hat{I}›p$ and $Σ^{+}n\rightarrowΣ^…

Measurements of the absolute branching fractions of the doubly Cabibbo-suppressed decays $D^{+}\to K^{+}\ddot{I}{€}^0$, $D^{+}\to K^{+}\hat{I}\cdot$ and $D^{+}\to K^{+}\hat{I}{\cdot }^{\prime }$

BESIII Collaboration, M. Ablikim, M. N. Achasov +689

Using $20.3\mathrm{f}{\mathrm{b}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at a center-of-mass energy of 3.773\,GeV with the BESIII detector, we present the measurements of the absolute branch…

Observation of $\ddot{I}ˆ(3686)\to K^{-}\hat{I}›(1520)\bar{\hat{I}}{ž}^{+}+c.c.$

BESIII Collaboration, M. Ablikim, M. N. Achasov +650

Based on $(2712.4\pm 14.3)\times 10^6$ $\ddot{I}ˆ(3686)$ events collected at the BESIII detector operating at the BEPCII collider, we present the first observation of the decay $ψ(3686)…

Search for $X(1870)$ via the decay $J/\ddot{I}ˆ\to \ddot{I}‰K^{+}{K}^{-}\hat{I}\cdot$

BESIII Collaboration, M. Ablikim, M. N. Achasov +649

Using a sample of $(10087\pm 44)\times 10^6$ $J/\ddot{I}ˆ$ events collected by the BESIII detector at the BEPCII collider, we search for the decay $X(1870)\to K^{+}{K}^{-}\hat{I}\cdot$ via the $J/ψ\to…

Amplitude analysis and branching fraction measurement of the Cabibbo-favored decay $D^{+}\to K^{-}\ddot{I}{€}^{+}\ddot{I}{€}^{+}\ddot{I}{€}^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +657

An amplitude analysis of the Cabibbo-favored decay $D^{+}\to K^{-}\ddot{I}{€}^{+}\ddot{I}{€}^{+}\ddot{I}{€}^0$ is performed, using 7.93 ${\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected with the BESIII detector a…

Search for the charmonium weak decay $J/\ddot{I}ˆ\to {\bar{D}}^0{\bar{K}}^{\ast 0}+c.c.$

BESIII Collaboration, M. Ablikim, M. N. Achasov +699

Based on a sample of $(10087\pm 44)\times 10^6$ $J/\ddot{I}ˆ$ events collected at the center-of-mass energy $\sqrt{s}$ = 3.0969 GeV with the BESIII detector, we search for the charmonium ra…

Observation of the $W$-annihilation process $D_s^{+}\to \ddot{I}‰\ddot{I}{}^{+}$ and measurement of $D_s^{+}\to \ddot{I}•\ddot{I}{}^{+}$ in $D_s^{+}\to \ddot{I}{€}^{+}\ddot{I}{€}^{+}\ddot{I}{€}^{-}\ddot{I}{€}^0\ddot{I}{€}^0$ decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +650

We present the first amplitude analysis and branching fraction measurement of the decay $D_s^{+}\to \ddot{I}{€}^{+}\ddot{I}{€}^{+}\ddot{I}{€}^{-}\ddot{I}{€}^0\ddot{I}{€}^0$, using $e^{+}{e}^{-}$ collision data collected with the BESIII det…

Observation of an Altered $a_0(980)$ Line shape in $D^{+}\to \ddot{I}{€}^{+}\hat{I}\cdot \hat{I}\cdot$

BESIII Collaboration, M. Ablikim, M. N. Achasov +693

Using $20.3{\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected with the BESIII detector at $\sqrt{s}=3.773\mathrm{GeV}$, we perform the first amplitude analysis of the decay $D^+\to…

A novel measurement of the strong-phase difference between $D^0\to K^{-}\ddot{I}{€}^{+}$ and ${\bar{D}}^0\to K^{-}\ddot{I}{€}^{+}$ decays using $C$-even and $C$-odd quantum-correlated $D\bar{D}$ pairs

BESIII Collaboration, M. Ablikim, M. N. Achasov +698

A novel measurement technique of strong-phase differences between the decay amplitudes of $D^0$ and ${\bar{D}}^0$ mesons is introduced which exploits quantum-correlated $D\bar{D}$ pa…

Observation of $D\to {\bar{K}}_1(1270)\hat{I}{¼}^{+}\hat{I}{½}_{\hat{I}}¼$ and test of lepton flavor universality with $D\to {\bar{K}}_1(1270){\ell }^{+}\hat{I}{½}_{\ell }$

BESIII Collaboration, M. Ablikim, M. N. Achasov +651

By analyzing 7.93 $\mathrm{f}{\mathrm{b}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at the center-of-mass energy of 3.773 GeV with the BESIII detector operated at the BEPCII collider, we report t…

First Measurement of the Decay Dynamics in the Semileptonic Transition of the $D^{+(0)}$ into the Axial-vector Meson ${\bar{K}}_1(1270)$

BESIII Collaboration, M. Ablikim, M. N. Achasov +677

Using $e^{+}{e}^{-}$ data taken at the center-of-mass energy of 3.773 GeV with the BESIII detector, corresponding to an integrated luminosity of 20.3 fb${}^{-1}$, we report the first measu…

Precise measurement of the form factors in $D^0\to K^{\ast }(892{)}^{-}\hat{I}{¼}^{+}\hat{I}{½}_{\hat{I}}¼$ and test of lepton universality with $D^0\to K^{\ast }(892{)}^{-}{\ell }^{+}\hat{I}{½}_{\ell }$ decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +688

We report a study of the semileptonic decay $D^0\to {\bar{K}}^0\ddot{I}{€}^{-}\hat{I}{¼}^{+}\hat{I}{½}_{\hat{I}}¼$ based on a sample of $7.9{\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ annihilation data collected at a center…

Search for sub-GeV invisible particles in inclusive decays of $J/\ddot{I}ˆ$ to $\ddot{I}•$

BESIII Collaboration, M. Ablikim, M. N. Achasov +696

A search for an invisible particle, $X$, with a mass between 0 and 0.96 $\text{GeV}/{\text{c}}^2$, is performed in the process $J/\ddot{I}ˆ\to \ddot{I}•+X$ using $(8774.0\pm39.4)\tim…

Observation of $D^{+}\to K_S^0\ddot{I}{€}^0\hat{I}{¼}^{+}\hat{I}{½}_{\hat{I}}¼$, Test of Lepton Flavor Universality and First Angular Analysis of $D^{+}\to {\bar{K}}^{\ast }(892{)}^0{\ell }^{+}\hat{I}{½}_{\ell }$

BESIII Collaboration, M. Ablikim, M. N. Achasov +688

We report a study of the semileptonic decays $D^{+}\to K_S^0\ddot{I}{€}^0{\ell }^{+}\hat{I}{½}_{\ell }$ ($\ell =e,\hat{I}¼$) based on $20.3{\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at the center-o…

Observation of $\ddot{I}ˆ(3686)\to \hat{I}{ž}^{-}{K}_S^0\bar{\hat{I}}{\text{c◯}}^{+}$+c.c

BESIII Collaboration, M. Ablikim, M. N. Achasov +678

Using a sample of $(2.712\pm 0.014)\times 10^9$ $\ddot{I}ˆ(3686)$ events collected with the BESIII detector at the electron positron collider BEPCII, the decay $ψ(3686) \to Ξ^- K^0_S…

Search for the electromagnetic Dalitz decays $\ddot{I}{‡}_{cJ}\to e^{+}{e}^{-}\ddot{I}•$

BESIII Collaboration, M. Ablikim, M. N. Achasov +689

Using a data sample of $(2.712\pm 0.014)\times 10^9$ $\ddot{I}ˆ(3686)$ events collected at $\sqrt{s}=3.686$ GeV by the BESIII detector, we search for the rare electromagnetic Dalitz dec…

Observation of Three Resonant Structures in the Cross Section of $e^{+}{e}^{-}\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}{h}_c$

BESIII Collaboration, M. Ablikim, M. N. Achasov +688

Using $e^{+}{e}^{-}$ collision data collected with the BESIII detector operating at the Beijing Electron Positron Collider, the cross section of $e^{+}{e}^{-}\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}{h}_c$ is measured at 5…

Measurement of the space-like $\ddot{I}{€}^0$ transition form factor

BESIII Collaboration, M. Ablikim, M. N. Achasov +689

Based on $2.93{\text{fb}}^{-1}$ of $e^{+}{e}^{-}$ collision data taken with the BESIII detector at a center-of-mass energy of $3.773\text{GeV}$, the two-photon fusion process $e^+e^-\t…

Study of the light scalar $a_0(980)$ through the decay $D^0\to a_0(980{)}^{-}{e}^{+}\hat{I}{½}_e$ with $a_0(980{)}^{-}\to \hat{I}\cdot \ddot{I}{€}^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +654

Using 7.93 $\mathrm{f}{\mathrm{b}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at a center-of-mass energy of 3.773 $\mathrm{GeV}$ with the BESIII detector, we present an analysis of the decay $D^{0}…

Experimental study of the reaction $\hat{I}{ž}^{0}n\to \hat{I}›\hat{I}›X$ using $\hat{I}{ž}^0$-nucleus scattering

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

Using $(10087\pm 44)\times 10^6$$J/\ddot{I}ˆ$ events collected with the BESIII detector operating at the BEPCII storage ring in $2009$, $2012$, $2018$, and $2019$, we perform a search for…

Study of the Magnetic Dipole Transition of $J/\ddot{I}ˆ\to {\hat{I}}^3\hat{I}{\cdot }_c$ via $\hat{I}{\cdot }_c\to p\bar{p}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +692

Using $(10.087\pm 0.044)\times 10^9$ $J/\ddot{I}ˆ$ events collected with the BESIII detector at the $e^{+}{e}^{-}$ BEPCII collider, we present the first amplitude analysis of $J/\ddot{I}ˆ\to {\hat{I}}^{3}p\bar{p}$…

Improved measurement of the semileptonic decay $D_s^{+}\to K^0{e}^{+}\hat{I}{½}_e$

BESIII Collaboration, M. Ablikim, M. N. Achasov +649

Analyzing $e^{+}{e}^{-}$ collision data corresponding to an integrated luminosity of $7.33{\mathrm{fb}}^{-1}$ collected at center-of-mass energies between 4.128 and 4.226~GeV with the BES…

Search for a $1^{-+}$ molecular state via $e^{+}{e}^{-}\to {\hat{I}}^3{D}_s^{+}{D}_{s1}^{-}(2536)+c.c.$

BESIII Collaboration, M. Ablikim, M. N. Achasov +651

We search, for the first time, for an exotic molecular state with quantum numbers $J^{PC}=1^{-+}$, called $X$, via the process $e^{+}{e}^{-}\to {\hat{I}}^3{D}_s^{+}{D}_{s1}^{-}(2536)+c.c.$ u…

Determination of CKM matrix element and axial vector form factors from weak decays of quantum-entangled strange baryons

BESIII Collaboration, M. Ablikim, M. N. Achasov +697

The electromagnetic structure of the nucleon can be determined from the scattering of electrons off a nucleon target. However, to study its axial structure, neutrino beams are requ…

Search for the baryon and lepton number violating decay $J/\ddot{I}ˆ\to p{e}^{-}$ + c.c

BESIII Collaboration, M. Ablikim, M. N. Achasov +667

Based on $(2712.4\pm 14.3)\times 10^6$ $\ddot{I}ˆ(3686)$ events collected by the BESIII detector operating at the BEPCII storage ring, we perform a search for the baryon- and lepton…

Amplitude analysis and branching fraction measurement of the decay $D^0\to K_S^0\ddot{I}{€}^0\ddot{I}{€}^0$

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

An amplitude analysis of the decay $D^0\to K_S^0\ddot{I}{€}^0\ddot{I}{€}^0$ is performed to determine the relative magnitudes and phases of different intermediate processes. The analysis uses $e^…

Measurement of the Branching Fraction of \boldmath{$\ddot{I}ˆ(2S)\to {\hat{I}}^3\ddot{I}{€}^0$}

BESIII Collaboration, M. Ablikim, M. N. Achasov +650

Based on $(2712.4\pm 14.1)\times 10^6\ddot{I}ˆ(2S)$ events, 7.9 fb${}^{-1}$ $\ddot{I}ˆ(3773)$ data, and 0.8 fb${}^{-1}$ off-resonance data samples collected with the BESIII detector, we measure the…

Measurement of the branching fractions of $D^{+}\to K^{+}{K}^{-}\ddot{I}{€}^{+}\ddot{I}{€}^{+}\ddot{I}{€}^{-}$, $\ddot{I}•\ddot{I}{€}^{+}\ddot{I}{€}^{+}\ddot{I}{€}^{-}$, $K_S^0{K}^{+}\ddot{I}{€}^{+}\ddot{I}{€}^{-}\ddot{I}{€}^0$, $K_S^0{K}^{+}\hat{I}\cdot$, and $K_S^0{K}^{+}\ddot{I}‰$ decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +686

Using $20.3{\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector operating at the BEPCII collider, the branching…

Observation of $\ddot{I}{‡}_{cJ}\to p\bar{p}{K}_S^0{K}^{-}\ddot{I}{€}^{+}+c.c.$

BESIII Collaboration, M. Ablikim, M. N. Achasov +653

By analyzing $(27.12\pm 0.14)\times 10^8$ $\ddot{I}ˆ(3686)$ events collected with the BESIII detector operating at the BEPCII collider, the decays of $χ_{cJ} \to p \bar{p} K^0_S K^- π^+ +…

Search for $1^{-+}$ charmonium-like hybrid via $e^{+}{e}^{-}\to {\hat{I}}^3\hat{I}{\cdot }^{(\prime )}\hat{I}{\cdot }_c$ at center-of-mass energies between 4.258 and 4.681 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +688

Using $e^{+}{e}^{-}$ collision data corresponding to an integrated luminosity of 10.6 fb${}^{-1}$ collected at center-of-mass energies between 4.258 and 4.681 GeV with the BESIII detec…

Measurement of the Born cross section for $e^{+}{e}^{-}\to p{K}^{-}{K}^{-}\bar{\hat{I}}{ž}^{+}$ at $\sqrt{s}=$ 3.5-4.9 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +695

Using $e^{+}{e}^{-}$ collision data corresponding to a total integrated luminosity of 20 ${\mathrm{fb}}^{-1}$ collected with the BESIII detector at the BEPCII collider, we present a measurem…

Observation of the electromagnetic radiative decays of the \boldmath{$\hat{I}›(1520)$} and \boldmath{$\hat{I}›(1670)$} to \boldmath{${\hat{I}}^3\hat{I}{\pounds }^0$}

BESIII Collaboration, M. Ablikim, M. N. Achasov +689

Using $(10087\pm 44)\times 10^6$ $J/\ddot{I}ˆ$ events collected with the BESIII detector, we report the first observation of the electromagnetic radiative decays of the $\hat{I}›(1520)$ and $Λ(…

Search for the massless dark photon with $D^0\toωγ'$ and $D^0\toγγ'$

BESIII Collaboration, M. Ablikim, M. N. Achasov +653

Using $7.9\mathrm{f}{\mathrm{b}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at $\sqrt{s}=3.773$ GeV with the BESIII detector at the BEPCII collider, we search for the massless dark photon with t…

Observation of the decay $\ddot{I}ˆ(3686)\to \hat{I}{\pounds }^0\bar{\hat{I}}{\pounds }^0\ddot{I}‰$

BESIII Collaboration, M. Ablikim, M. N. Achasov +689

Using a dataset of $(27.12\pm 0.14)\times 10^8$ $\ddot{I}ˆ(3686)$ events collected by the BESIII detector operating at the BEPCII collider, we report the first observation of the decay…

Improved Measurements of $D^{+}\to \hat{I}\cdot e^{+}\hat{I}{½}_e$ and $D^{+}\to \hat{I}\cdot \hat{I}{¼}^{+}\hat{I}{½}_{\hat{I}}¼$

BESIII Collaboration, M. Ablikim, M. N. Achasov +677

Using 20.3 fb${}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at the center-of-mass energy of 3.773 GeV with the BESIII detector, we measure the branching fractions of $D^+\to ηe^+ν_…

Precise Measurement of the $\hat{I}›$ Electric Dipole Moment through the Entangled Strange Baryon-Antibaryon System

BESIII Collaboration, M. Ablikim, M. N. Achasov +688

The dominance of matter over antimatter in the universe has consistently driven the pursuit of new physics beyond the Standard Model that violates charge-parity symmetry. Unlike th…

Measurement of Born cross sections of $e^{+}{e}^{-}\to \hat{I}{ž}^0\bar{\hat{I}}{ž}^0$ and search for charmonium(-like) states at $\sqrt{s}$ = 3.51-4.95 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +653

Using $e^{+}{e}^{-}$ collision data collected by the BESIII detector at BEPCII corresponding to an integrated luminosity of 30 $\mathrm{f}{\mathrm{b}}^{-1}$, we measure Born cross sections and effective…

Search for the radiative decays $D^{+}\to {\hat{I}}^3\ddot{I}{}^{+}$ and $D^{+}\to {\hat{I}}^3{K}^{\ast +}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +652

We search for the radiative decays $D^{+}\to {\hat{I}}^3\ddot{I}{}^{+}$ and $D^{+}\to {\hat{I}}^3{K}^{\ast +}$ using 20.3~fb${}^{-1}$ of $e^{+}{e}^{-}$ annihilation data collected at the center-of-mass energy $\sqrt{s}=3…

Observation of the singly Cabibbo suppressed decay $D^0\to b_1(1235{)}^{-}{e}^{+}\hat{I}{½}_e$ and evidence for $D^{+}\to b_1(1235{)}^0{e}^{+}\hat{I}{½}_e$

BESIII Collaboration, M. Ablikim, M. N. Achasov +657

By analyzing a data sample of $e^{+}{e}^{-}$ collisions with center-of-mass energy $\sqrt{s}=3.773$~GeV, corresponding to an integrated luminosity of $7.9{\mathrm{fb}}^{-1}$ collected with t…

Observation of $\ddot{I}{‡}_{cJ}(J=0,1,2)\to p\bar{p}\hat{I}\cdot \hat{I}\cdot$

BESIII Collaboration, M. Ablikim, M. N. Achasov +677

Using $(2712.4\pm 14.3)\times 10^6$ $\ddot{I}ˆ(3686)$ events collected by the BESIII detector operating at the BEPCII storage ring, the decays $\ddot{I}{‡}_{cJ}(J=0,1,2)\to p\bar{p}\hat{I}\cdot \hat{I}\cdot$ are…

First observation of $\hat{I}{›}_c(2595{)}^{+}\to \hat{I}{›}_c^{+}\ddot{I}{€}^0\ddot{I}{€}^0$ and $\hat{I}{›}_c(2625{)}^{+}\to \hat{I}{›}_c^{+}\ddot{I}{€}^0\ddot{I}{€}^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +658

By analysing $e^{+}{e}^{-}$ annihilation data corresponding to an integrated luminosity of 368.48~pb${}^{-1}$ collected at the centre-of-mass energies of $\sqrt{s}=4.918$ and $4.951$~GeV…

Search for the reaction channel $e^{+}{e}^{-}\to \hat{I}\cdot \hat{I}\cdot J/\ddot{I}ˆ$ and the isospin partner of the $Z_c(3900)$ at center-of-mass energies $\sqrt{s}=4.226-4.950$ GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +693

We search for the reaction channel $e^{+}{e}^{-}\to \hat{I}\cdot \hat{I}\cdot J/\ddot{I}ˆ$ in a data sample with center-of-mass energies from 4.226 to 4.950~GeV, which was collected by the BESIII detector operat…

Search for the lepton number violating decay $\hat{I}\cdot \to \ddot{I}{€}^{+}\ddot{I}{€}^{+}{e}^{-}{e}^{-}+c.c.$ via $J/\ddot{I}ˆ\to \ddot{I}•\hat{I}\cdot$

BESIII Collaboration, M. Ablikim, M. N. Achasov +689

Based on a sample of $(10.087\pm 0.044)\times 10^{9}J/\ddot{I}ˆ$ events collected by the BESIII detector at the BEPCII collider, we perform the first search for the lepton number violat…

First measurement of the cross sections for $e^{+}{e}^{-}\to K^0{K}^{-}\ddot{I}{€}^{+}J/\ddot{I}ˆ+c.c.$ at $\sqrt{s}$ from 4.396 to 4.951 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +701

Using $e^{+}{e}^{-}$ collision data at 19 center-of-mass energies ranging from $4.396$ to $4.951\mathrm{GeV}$ corresponding to a total integrated luminosity of $8.86{\mathrm{fb}}^{-1}$ coll…

Search for $\hat{I}{\cdot }_c(2S)\to \ddot{I}‰\ddot{I}‰$ and $\ddot{I}‰\ddot{I}•$ decays and measurements of $\ddot{I}{‡}_{cJ}\to \ddot{I}‰\ddot{I}‰$ and $\ddot{I}‰\ddot{I}•$ in $\ddot{I}ˆ(2S)$ radiative processes

BESIII Collaboration, M. Ablikim, M. N. Achasov +649

Using $(2712\pm 14)$ $\times$ 10${}^6$ $\ddot{I}ˆ(2S)$ events collected with the BESIII detector at the BEPCII collider, we search for the decays $\hat{I}{\cdot }_c(2S)\to \ddot{I}‰\ddot{I}‰$ and $η_{c}(2S)\toωυ

Study of $\hat{I}\cdot \to \ddot{I}{€}^{+}\ddot{I}{€}^{-}{l}^{+}{l}^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +639

Using a sample of $(10087\pm 44)\times 10^6$ $J/\ddot{I}ˆ$ events accumulated with the BESIII detector, we analyze the decays $\hat{I}\cdot \to \ddot{I}{€}^{+}\ddot{I}{€}^{-}{l}^{+}{l}^{-}$ ($l=e$ or $\hat{I}¼$) via the process…

Measurement of the Branching Fraction for the Decay $\ddot{I}{‡}_{cJ}\to p\bar{p}\hat{I}\cdot \ddot{I}{€}^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +650

Using $(2712.4\pm 14.3)\times 10^6\ddot{I}ˆ(3686)$ events collected by the BESIII detector operating at the BEPCII collider, we present the first observations of the decays $χ_{cJ}(J=0,1…

Measurements of $K_S^0$-$K_L^0$ asymmetries in the decays $\hat{I}{›}_c^{+}\to p{K}_{L,S}^0$, $p{K}_{L,S}^0\ddot{I}{€}^{+}\ddot{I}{€}^{-}$ and $p{K}_{L,S}^0\ddot{I}{€}^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +649

Using $e^{+}{e}^{-}$ annihilation data sets corresponding to an integrated luminosity of 4.5 ${\text{fb}}^{-1}$, collected with the BESIII detector at center-of-mass energies between 4.600…

Search for lepton number violating decays of $D_s^{+}\to h^{-}{h}^0{e}^{+}{e}^{+}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +655

Based on 7.33 fb${}^{-1}$ of $e^{+}{e}^{-}$ collision data collected by the BESIII detector operating at the BEPCII collider at center-of-mass energies from 4.128 to 4.226 GeV, a search fo…

Measurement of the branching fractions of the Cabibbo-favored decays $\hat{I}{›}_c^{+}\to \hat{I}›K_S^0{K}^{+}$ and $\hat{I}{›}_c^{+}\to \hat{I}{ž}^0{K}_S^0\ddot{I}{€}^{+}$ and search for $\hat{I}{›}_c^{+}\to \hat{I}{\pounds }^0{K}_S^0{K}^{+}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +664

Based on $e^{+}{e}^{-}$ collision data corresponding to an integrated luminosity of about 4.5 fb${}^{-1}$ collected at center-of-mass energies between 4599.53 MeV and 4698.82 MeV with…

Observation of $\ddot{I}ˆ(3686)\to {\hat{I}}^3\hat{I}\cdot (1405)$ via $\hat{I}\cdot (1405)\to f_0(980)\ddot{I}{€}^0$

M. Ablikim, M. N. Achasov, P. Adlarson +694

The decay $\ddot{I}ˆ(3686)\to {\hat{I}}^3\ddot{I}{€}^{+}\ddot{I}{€}^{-}\ddot{I}{€}^0$ is studied using a sample of $(2712.4\pm 14.3)\times 10^6$ $\ddot{I}ˆ(3686)$ events collected with the BESIII detector. The decay $η(1405)\toπ^+π^-Ï…

Search for CP violation in $e^{+}{e}^{-}\to \ddot{I}ˆ(3770)\to D^0{\bar{D}}^0$ via $D->K_S^0\ddot{I}{€}^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +701

Utilizing data sample of electron-positron collisions recorded with the BESIII detector at the center of mass energy of 3.773 GeV, corresponding to an integrated luminosity of 20.2…

Study of $D_s^{+}\to f_0(980)\ddot{I}{}^{+}$ and $\ddot{I}•\ddot{I}{€}^{+}$ decays through $D_s^{+}\to \ddot{I}{€}^{+}\ddot{I}{€}^{+}\ddot{I}{€}^{-}\ddot{I}{€}^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +655

We perform the first amplitude analysis of $D_s^{+}\to \ddot{I}{€}^{+}\ddot{I}{€}^{+}\ddot{I}{€}^{-}\ddot{I}{€}^0$ decays, based on data samples of electron-positron collisions recorded with the BESIII detector at center-of…

Measurement of the ${\mathbf{e}}^{+}{\mathbf{e}}^{-}\to {\mathbf{K}}^{+}{\mathbf{K}}^{-}\ddot{\mathbf{I}}ˆ(2\mathbf{S})$ Cross Section at Center-of-Mass Energies from 4.699 to 4.951 GeV and Search for ${\mathbf{Z}}_{\mathbf{cs}}^{\pm }$ in the ${\mathbf{Z}}_{\mathbf{cs}}^{\pm }\to {\mathbf{K}}^{\pm }\ddot{\mathbf{I}}ˆ(2\mathbf{S})$ Decay

BESIII Collaboration, M. Ablikim, M. N. Achasov +651

We perform the first investigation of the process $e^{+}{e}^{-}\to K^{+}{K}^{-}\ddot{I}ˆ(2S)$ and report its Born cross sections over a range of center-of-mass energies from 4.699 to 4.951~GeV. T…

Search for the lepton number violating process $J/\ddot{I}ˆ\to K^{+}{K}^{+}{e}^{-}{e}^{-}+c.c.$

BESIII Collaboration, M. Ablikim, M. N. Achasov +689

Based on $(10087\pm 44)\times 10^6$ $J/\ddot{I}ˆ$ events collected with the BESIII detector, we search for the lepton number violating decay $J/\ddot{I}ˆ\to K^{+}{K}^{+}{e}^{-}{e}^{-}+c.c.$ for the first t…

Study of the decay ψ(3686) \to Σ^{0}\barΣ^{0}ϕ

BESIII Collaboration, M. Ablikim, M. N. Achasov +649

Using $(27.12\pm 0.14)\times 10^8$ $\ddot{I}ˆ(3686)$ events collected with the BESIII detector operating at the BEPCII collider, the decay $\ddot{I}ˆ(3686)\to \hat{I}{\pounds }^0\bar{\hat{I}}{\pounds }^0\ddot{I}•$ is observed fo…

Precise Measurement of the $\ddot{I}{‡}_{c0}$ Resonance Parameters and Branching Fractions of $\ddot{I}{‡}_{c0,c2}\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}/K^{+}{K}^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +653

By analyzing a $\ddot{I}ˆ(3686)$ data sample containing $(107.7\pm 0.6)\times 10^6$ events taken with the BESIII detector at the BEPCII storage ring in 2009, the $\ddot{I}{‡}_{c0}$ resonance param…

Search for $J/\ddot{I}ˆ\to K_S^0{K}_S^0$ and $\ddot{I}ˆ(3686)\to K_S^0{K}_S^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +678

Using data samples of $(10087\pm 44)\times 10^6$ $J/\ddot{I}ˆ$ events and $(2712.4\pm 14.3)\times 10^6$ $\ddot{I}ˆ(3686)$ events collected with the BESIII detector at the BEPCII collider, we s…

Study of $f_1(1420)$ and $\hat{I}\cdot (1405)$ in the decay $J/\ddot{I}ˆ\to {\hat{I}}^3\ddot{I}{€}^0\ddot{I}{€}^0\ddot{I}{€}^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +652

A partial-wave analysis is performed on the decay $J/\ddot{I}ˆ\to {\hat{I}}^3\ddot{I}{€}^0\ddot{I}{€}^0\ddot{I}{€}^0$ within the $\ddot{I}{€}^0\ddot{I}{€}^0\ddot{I}{€}^0$ invariant-mass region below 1.6 GeV$/c^2$, using $(10.09~\pm~0.04)…

Search for the double Dalitz decays $\hat{I}\cdot /\hat{I}{\cdot }^{\prime }\to e^{+}{e}^{-}\hat{I}{¼}^{+}\hat{I}{¼}^{-}$ and $\hat{I}{\cdot }^{\prime }\to \hat{I}{¼}^{+}\hat{I}{¼}^{-}\hat{I}{¼}^{+}\hat{I}{¼}^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +653

Using a data sample of $(10087\pm 44)\times 10^6$ $J/\ddot{I}ˆ$ events collected with the BESIII detector, we search for the decays $\hat{I}\cdot /\hat{I}{\cdot }^{\prime }\to e^{+}{e}^{-}\hat{I}{¼}^{+}\hat{I}{¼}^{-}$ and $η' \to μ^+μ^-Î…

Search for the rare decay $J/\ddot{I}ˆ\to {\hat{I}}^3{D}^0+c.c.$ at BESIII

BESIII Collaboration, M. Ablikim, M. N. Achasov +650

Using $(10087\pm 44)\times 10^{6}J/\ddot{I}ˆ$ events collected with the BESIII detector, we search for the rare decay $J/\ddot{I}ˆ\to {\hat{I}}^3{D}^0+c.c.$ for the first time. No obvious signal is observed an…

Search for the FCNC charmonium decay $J/\ddot{I}ˆ\to D^0\hat{I}{¼}^{+}\hat{I}{¼}^{-}+\text{c.c.}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +678

Based on a data sample of $(10087\pm 44)\times 10^6$ $J/\ddot{I}ˆ$ events taken with the BESIII detector, we search for the flavor-changing neutral current charmonium decay $J/ψ\to D^{…

Helicity amplitude and branching fraction measurement of $\ddot{I}{‡}_{cJ}\to \hat{I}›\bar{\hat{I}}›$

BESIII Collaboration, M. Ablikim, M. N. Achasov +689

Utilizing $2712.4\pm 14.3$ million $\ddot{I}ˆ(3686)$ events accumulated by the BESIII experiment, we perform a partial wave analysis of $ψ(3686)\rightarrowγχ_{cJ}\rightarrowγΛ\barΛ…

Study of the electromagnetic Dalitz decay $J/\ddot{I}ˆ\to e^{+}{e}^{-}\ddot{I}{€}^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +640

We report the first measurement of the di-electron invariant mass dependent transition form factor in the electromagnetic Dalitz decay $J/\ddot{I}ˆ\to e^{+}{e}^{-}\ddot{I}{€}^0$ using $(10087 \pm 44) \…

Observation of an Altered $a_0(980)$ Line-shape in $D^{+}\to \ddot{I}{€}^{+}\hat{I}\cdot \hat{I}\cdot$ due to the Triangle Loop Rescattering Effect

BESIII Collaboration, M. Ablikim, M. N. Achasov +697

Using 20.3~${\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ collision data taken with the BESIII detector at the center-of-mass energy 3.773~GeV, we report the first amplitude analysis of the hadro…

Measurement of the branching fractions of doubly Cabibbo-suppressed $D$ decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +653

By analyzing $e^{+}{e}^{-}$ collision data collected at the center-of-mass energy of 3.773~GeV with the BESIII detector, corresponding to an integrated luminosity of 20.3~fb${}^{-1}$, we m…

Model-independent determination of the strong-phase difference between $D^0$ and ${\bar{D}}^0\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}\ddot{I}{€}^{+}\ddot{I}{€}^{-}$ decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +652

Measurements of the strong-phase difference between $D^0$ and ${\bar{D}}^0\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}\ddot{I}{€}^{+}\ddot{I}{€}^{-}$ are performed in bins of phase space. The study exploits a sample of quantum-correlated…

Search for $\hat{I}{\cdot }_c(2S)\to p\bar{p}{K}^{+}{K}^{-}$ and measurement of $\ddot{I}{‡}_{cJ}\to p\bar{p}{K}^{+}{K}^{-}$ in $\ddot{I}ˆ(3686)$ radiative decays

M. Ablikim, M. N. Achasov, P. Adlarson +647

A search for $\hat{I}{\cdot }_c(2S)\to p\bar{p}{K}^{+}{K}^{-}$, together with measurement of branching fractions of $\ddot{I}{‡}_{cJ(J=0,1,2)}\to p\bar{p}{K}^{+}{K}^{-}$ in the $\ddot{I}ˆ(3686)\to {\hat{I}}^3\hat{I}{\cdot }_c(2S)$ and the $ψ(368…

First observation of quantum correlations in $e^{+}{e}^{-}\to XD\bar{D}$ and $C$-even constrained $D\bar{D}$ pairs

BESIII Collaboration, M. Ablikim, M. N. Achasov +698

The study of meson pairs produced with quantum correlations gives direct access to parameters that are challenging to measure in other systems. In this Letter, the existence of qua…

The Production and Decay Dynamics of the Charmed Baryon $\hat{I}{›}_c^{+}$ in $e^{+}{e}^{-}$ Annihilations near Threshold

BESIII Collaboration, M. Ablikim, M. N. Achasov +700

The study of the charmed baryons is crucial for investigating the strong and weak interactions in the Standard Model and for gaining insights into the internal structure of baryons…

Search for $e^{+}{e}^{-}\to \ddot{I}•\ddot{I}{‡}_{c0}$ and $\ddot{I}•\hat{I}{\cdot }_{c2}(1D)$ at center-of-mass energies from 4.47 to 4.95 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +650

Utilizing a data set of $6.7$ fb${}^{-1}$ from electron-positron collisions recorded by the BESIII detector at the BEPCII storage ring, a search is conducted for the processes $e^{+}…

Improved measurement of absolute branching fraction of the inclusive decay $\hat{I}{›}_c^{+}\to K_S^{0}X$

BESIII Collaboration, M. Ablikim, M. N. Achasov +676

By analyzing $4.5$ fb${}^{-1}$ of $e^{+}{e}^{-}$ collision data accumulated with the BESIII detector at center-of-mass energies ranging from $4599.53$ MeV to $4698.82$ MeV, we report t…

Measurements of the branching fractions of the $P$-wave charmonium spin-singlet state $h_c{(}^1{P}_1)\to h^{+}{h}^{-}\ddot{I}{€}^0/\hat{I}\cdot$

BESIII Collaboration, M. Ablikim, M. N. Achasov +649

Based on $(2712.4\pm 14.3)\times 10^6$ $\ddot{I}ˆ(3686)$ events, we investigate four hadronic decay modes of the $P$-wave charmonium spin-singlet state $h_c{(}^1{P}_1)\to h^{+}{h}^{-}\ddot{I}{€}^0/\hat{I}\cdot$ (…

Study of ${\bar{K}}^{\ast }(892{)}^0\hat{I}\cdot$ and $K_S^0{a}_0(980{)}^0$ in the $D^0\to K_S^0\ddot{I}{€}^0\hat{I}\cdot$ decay

BESIII Collaboration, M. Ablikim, M. N. Achasov +666

We perform an amplitude analysis of the decay $D^0\to K_S^0\ddot{I}{€}^0\hat{I}\cdot$ and measure its absolute branching fraction to be $(1.016 \pm 0.013_{\text {stat.}} \pm 0.014_{\text {syst.}})…

Study of the decay and production properties of $D_{s1}(2536)$ and $D_{s2}^{\ast }(2573)$