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View article: Unraveling the Structure of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi mathvariant="normal">Λ</mml:mi> </mml:math> Hyperons with Polarized <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi mathvariant="normal">Λ</mml:mi> <mml:mover accent="true"> <mml:mrow> <mml:mi mathvariant="normal">Λ</mml:mi> </mml:mrow> <mml:mrow> <mml:mo stretchy="false">¯</mml:mo> </mml:mrow> </mml:mover> </mml:mrow> </mml:math> Pairs
Unraveling the Structure of Hyperons with Polarized Pairs Open
With data collected in a dedicated energy scan from 2.3864 up to 3.0800 GeV, the BESIII Collaboration provides the first complete energy-dependent measurements of the Λ electromagnetic form factors in the timelike region. By combining do…
View article: Feasibility study of LYSO-SiPM in-beam TOF-PET for dose monitoring in carbon-ion radiotherapy
Feasibility study of LYSO-SiPM in-beam TOF-PET for dose monitoring in carbon-ion radiotherapy Open
Objective. In-beam positron emission tomography (PET) is a promising approach for dose monitoring in carbon-ion radiotherapy (CIRT). This study evaluated the feasibility of a dual-head PET system using lutetium–yttrium oxyorthosilicate (LY…
View article: Amplitude analysis and branching fraction measurement of the Cabibbo-favored decay D+ → K−π+π+π0
Amplitude analysis and branching fraction measurement of the Cabibbo-favored decay D+ → K−π+π+π0 Open
A bstract An amplitude analysis of the Cabibbo-favored decay D + → K − π + π + π 0 is performed, using 7.93 fb − 1 of e + e − collision data collected with the BESIII detector at the center-of-mass energy of 3.773 GeV. The branching fracti…
View article: Search for the leptonic decay $D^{+}\to e^{+}ν_{e}$
Search for the leptonic decay $D^{+}\to e^{+}ν_{e}$ Open
We search for the leptonic decay $D^+\to e^+ν_{e}$ using an $e^+e^-$ collision data sample with an integrated luminosity of 20.3~fb$^{-1}$ collected with the BESIII detector at the center-of-mass energy of 3.773~GeV. No significant signal …
View article: Observation of the charmonium decay $η_c\toγγ$ in $J/ψ\toγη_c$
Observation of the charmonium decay $η_c\toγγ$ in $J/ψ\toγη_c$ Open
Using $(2712.4\pm14.3)\times10^{6}$ $ψ(3686)$ events collected with the BESIII detector at the BEPCII collider, the decay $η_c\toγγ$ in $J/ψ\toγη_c$ is observed. We determine the product branching fraction $\mathcal{B}(J/ψ\toγη_c)\times\ma…
View article: Measurement of the Inclusive Cross Sections of Prompt $J/ψ$ and $ψ(3686)$ Production in $e^{+}e^{-}$ Annihilation from $\sqrt{s}=3.808$ to $4.951$ GeV
Measurement of the Inclusive Cross Sections of Prompt $J/ψ$ and $ψ(3686)$ Production in $e^{+}e^{-}$ Annihilation from $\sqrt{s}=3.808$ to $4.951$ GeV Open
The inclusive cross sections of prompt $J/ψ$ and $ψ(3686)$ production are measured at center-of-mass energies from 3.808 to 4.951 GeV. The dataset used is 22 fb$^{-1}$ of $e^{+}e^{-}$ annihilation data collected with the BESIII detector op…
View article: Study of the light scalar $a_{0}(980)$ through the decay $D^{0} \to a_{0}(980)^-e^{+} ν_{e}$ with $a_{0}(980)^- \to ηπ^-$
Study of the light scalar $a_{0}(980)$ through the decay $D^{0} \to a_{0}(980)^-e^{+} ν_{e}$ with $a_{0}(980)^- \to ηπ^-$ Open
Using 7.93 ${\rm fb^{-1}}$ of $e^+e^-$ collision data collected at a center-of-mass energy of 3.773 ${\rm GeV}$ with the BESIII detector, we present an analysis of the decay $D^{0} \to ηπ^- e^+ ν_{e}$. The branching fraction of the decay $…
View article: Observation of $D^+\toη^\primeμ^+ν_μ$ and First Study of $D^+\to η^\prime \ell^+ν_\ell$ Decay Dynamics
Observation of $D^+\toη^\primeμ^+ν_μ$ and First Study of $D^+\to η^\prime \ell^+ν_\ell$ Decay Dynamics Open
Using $20.3\,\rm fb^{-1}$ 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 decay $D^+\to η^\prime μ^+ν_μ$ with significance of $8.6σ$…
View article: Search for the radiative decays $D^+\toγρ^+$ and $D^+\toγK^{*+}$
Search for the radiative decays $D^+\toγρ^+$ and $D^+\toγK^{*+}$ Open
We search for the radiative decays $D^{+} \to γρ^+$ and $D^{+} \to γK^{*+}$ using 20.3~fb$^{-1}$ of $e^+e^-$ annihilation data collected at the center-of-mass energy $\sqrt{s}=3.773$ GeV by the BESIII detector operating at the BEPCII colli…
View article: Observation of an axial-vector state in the study of $ψ(3686) \to ϕηη'$ decay
Observation of an axial-vector state in the study of $ψ(3686) \to ϕηη'$ decay Open
Using (2712.4 $\pm$ 14.3)$\times 10^{6}$ $ψ(3686)$ events collected with the BESIII detector at BEPCII, a partial wave analysis of the decay $ψ(3686) \to ϕηη' $ is performed with the covariant tensor approach. An axial-vector state with a …
View article: Search for $D^0\to K^-ηe^+ν_e$, $D^+\to K_S^0 ηe^+ν_e$ and $D^+\to ηηe^+ν_e$ decays
Search for $D^0\to K^-ηe^+ν_e$, $D^+\to K_S^0 ηe^+ν_e$ and $D^+\to ηηe^+ν_e$ decays Open
By analyzing $e^+e^-$ annihilation data corresponding to an integrated luminosity of 7.93 fb$^{-1}$, collected at the center-of-mass energy of 3.773 GeV with the BESIII detector, we search for the semileptonic decays $D^0\to K^-ηe^+ν_e$, $…
View article: Study of the decay $D^0\rightarrow ρ(770)^-e^+ν_e$
Study of the decay $D^0\rightarrow ρ(770)^-e^+ν_e$ Open
We present a study of the semileptonic decay $D^0\rightarrow π^-π^0e^{+}ν_{e}$ using an $e^+e^-$ annihilation data sample of $7.93~\mathrm{fb}^{-1}$ collected at the center-of-mass energy of 3.773 GeV with the BESIII detector. The branchin…
View article: Improving embedding with contrastive fine-tuning on small datasets with expert-augmented scores
Improving embedding with contrastive fine-tuning on small datasets with expert-augmented scores Open
This paper presents an approach to improve text embedding models through contrastive fine-tuning on small datasets augmented with expert scores. It focuses on enhancing semantic textual similarity tasks and addressing text retrieval proble…
View article: Improved measurement of the semileptonic decay $D^+_{s}\to K^0 e^+ν_e$
Improved measurement of the semileptonic decay $D^+_{s}\to K^0 e^+ν_e$ Open
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 BESIII detector, we measure the branching fraction of the semi…
View article: Cross section measurement of $e^+e^-\to ηψ(2S)$ and search for $e^+e^-\toη\tilde{X}(3872)$
Cross section measurement of $e^+e^-\to ηψ(2S)$ and search for $e^+e^-\toη\tilde{X}(3872)$ Open
The energy-dependent cross section for $e^+e^-\to ηψ(2S)$ is measured at eighteen center of mass energies from 4.288 GeV to 4.951 GeV using the BESIII detector. Using the same data samples, we also perform the first search for the reaction…
View article: Observation of $ψ(3686)\to 3ϕ$
Observation of $ψ(3686)\to 3ϕ$ Open
Using $(2.712\pm0.014)\times 10^9$ $ψ(3686)$ events collected by the BESIII detector operating at the BEPCII collider, we report the first observation of $ψ(3686)\to 3ϕ$ decay with a significance larger than 10$σ$. The branching fraction o…
View article: Measurement of the e+e− → $$ {K}_S^0{K}_L^0 $$π0 cross sections from $$ \sqrt{s} $$ = 2.000 to 3.080 GeV
Measurement of the e+e− → $$ {K}_S^0{K}_L^0 $$π0 cross sections from $$ \sqrt{s} $$ = 2.000 to 3.080 GeV Open
A bstract Based on e + e − collision data collected at center-of-mass energies from 2.000 to 3.080 GeV by the BESIII detector at the BEPCII collider, a partial wave analysis is performed for the process e + e − → $$ {K}_S^0{K}_L^0 $$ …
View article: Improved measurements of the Dalitz decays $η/η'\rightarrowγe^{+}e^{-}$
Improved measurements of the Dalitz decays $η/η'\rightarrowγe^{+}e^{-}$ Open
Based on a data sample of 10 billion $J/ψ$ events collected with the BESIII detector, improved measurements of the Dalitz decays $η/η'\rightarrowγe^+e^-$ are performed, where the $η$ and $η'$ are produced through the radiative decays $J/ψ\…
View article: Observation of $ψ(3686) \to Ω^- K^+ \barΞ^0 $+c.c
Observation of $ψ(3686) \to Ω^- K^+ \barΞ^0 $+c.c Open
Using $(27.12 \pm 0.14) \times 10^{8}$ $ψ(3686)$ events collected with the BESIII detector at BEPCII, the decay of $ψ(3686) \to Ω^- K^+ \barΞ^0 +c.c.$ is observed for the first time. The branching fraction of this decay is measured to be $…
View article: Partial Wave Analysis of $J/ψ\rightarrow γγϕ$
Partial Wave Analysis of $J/ψ\rightarrow γγϕ$ Open
Using a sample of $(10087\pm44)\times10^{6}$ $J/ψ$ events collected by the BESIII detector at the BEPCII collider, a partial-wave analysis of the decay $γγϕ$ is performed to investigate the intermediate resonances in $J/ψ\rightarrowγR, R\a…
View article: Search for a massless particle beyond the Standard Model in the $Σ^+\rightarrow p+{\rm invisible}$ decay
Search for a massless particle beyond the Standard Model in the $Σ^+\rightarrow p+{\rm invisible}$ decay Open
A massless particle beyond the Standard Model is searched for in the two-body decay $Σ^+\rightarrow p+{\rm invisible}$ using $(1.0087\pm0.0044)\times10^{10}$ $J/ψ$ events collected at a center-of-mass energy of $\sqrt{s}=3.097$ GeV with th…
View article: Observation of significant flavor-SU(3) breaking in the kaon wave function at $12~{\rm GeV}^2
Observation of significant flavor-SU(3) breaking in the kaon wave function at $12~{\rm GeV}^2 Open
We present cross sections for the reaction $e^+e^-\to K_S^0K_L^0$ at center-of-mass energies ranging from 3.51 GeV to 4.95 GeV using data samples collected in the BESIII experiment, corresponding to a total integrated luminosity of 26.5 fb…