F. De Mori
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View article: Study of the reactions $\bar{n} p \to 2π^{+}π^{-}$, $2π^{+}π^{-}π^{0}$, and $2π^{+}π^{-}2π^{0}$ using $J/ψ\to p π^{-}\bar{n}$
Study of the reactions $\bar{n} p \to 2π^{+}π^{-}$, $2π^{+}π^{-}π^{0}$, and $2π^{+}π^{-}2π^{0}$ using $J/ψ\to p π^{-}\bar{n}$ Open
We report an experimental investigation of the reactions $\bar{n} p \to 2π^{+}π^{-}$, $\bar{n} p \to 2π^{+}π^{-}π^{0}$, and $\bar{n} p \to 2π^{+}π^{-}2π^{0}$ using $(10.087 \pm 0.044) \times 10^{9}$ $J/ψ$ events collected with the BESIII d…
Measurements of the cross sections of and near kinematic thresholds Open
View article: Measurement of the Born cross section for $$ {e}^{+}{e}^{-}\to p{K}^{-}{K}^{-}{\overline{\Xi}}^{+} $$ at $$ \sqrt{s}=3.5\hbox{--} 4.9 $$ GeV
Measurement of the Born cross section for $$ {e}^{+}{e}^{-}\to p{K}^{-}{K}^{-}{\overline{\Xi}}^{+} $$ at $$ \sqrt{s}=3.5\hbox{--} 4.9 $$ GeV Open
View article: Measurement of the phase between strong and electromagnetic amplitudes in the decay J/ψ → ϕη
Measurement of the phase between strong and electromagnetic amplitudes in the decay J/ψ → ϕη Open
A bstract The first direct measurement of the relative phase between the strong and electromagnetic amplitudes for a J/ψ decaying into a vector-pseudoscalar final state is performed using 26 energy points of e + e − annihilation data betwe…
View article: Measurement of branching fractions of $$ {\Lambda}_c^{+} $$ decays to Σ+η and Σ+η′
Measurement of branching fractions of $$ {\Lambda}_c^{+} $$ decays to Σ+η and Σ+η′ Open
Observation of , Test of Lepton Flavor Universality, and First Angular Analysis of Open
View article: Measurements of the absolute branching fractions of the doubly Cabibbo-suppressed decays D+ → K+π0, D+ → K+η and D+ → K+η′
Measurements of the absolute branching fractions of the doubly Cabibbo-suppressed decays D+ → K+π0, D+ → K+η and D+ → K+η′ Open
A bstract Using 20.3 fb − 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 branching fractions of the doubly Cabibbo-suppressed decays D + →…
View article: First measurement of the cross sections for $e^{+}e^{-}\to K^{0}K^{-}π^{+}J/ψ+c.c.$ at $\sqrt{s}$ from 4.396 to 4.951 GeV
First measurement of the cross sections for $e^{+}e^{-}\to K^{0}K^{-}π^{+}J/ψ+c.c.$ at $\sqrt{s}$ from 4.396 to 4.951 GeV Open
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 $8.86~{\rm fb}^{-1}$ collected by the BESIII detector, the process $e^+e^-\to K^{0}K…
View article: Observation of $$ {\chi}_{cJ}\left(J=0,1,2\right)\to p\overline{p}\eta \eta $$
Observation of $$ {\chi}_{cJ}\left(J=0,1,2\right)\to p\overline{p}\eta \eta $$ Open
A bstract Using (2712 . 4 ± 14 . 3) × 10 6 ψ (3686) candidates collected by the BESIII detector operating at the BEPCII storage ring, the decays $$ {\chi}_{cJ}\left(J=0,1,2\right)\to p\overline{p}\eta \eta $$ are observed …
View article: Search for Sub-GeV Invisible Particles in Inclusive Decays of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:math> to <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ϕ</mml:mi></mml:math>
Search for Sub-GeV Invisible Particles in Inclusive Decays of to Open
A search for an invisible particle, X, with a mass between 0 and 0.96 GeV/c2, is performed in the process J/ψ→ϕ+X using (8774.0±39.4)×106 J/ψ events collected with the BESIII detector from 2017 to 2019. The ϕ meson is fully reconstructed…
View article: Amplitude analysis of $$ \psi (3686)\to \gamma {K}_S^0{K}_S^0 $$
Amplitude analysis of $$ \psi (3686)\to \gamma {K}_S^0{K}_S^0 $$ Open
A bstract Using (2712 ± 14) × 10 6 ψ (3686) events collected with the BESIII detector, we perform the first amplitude analysis of the radiative decay $$ \psi (3686)\to \gamma {K}_S^0{K}_S^0 $$ within the mass region $$ {M}_{K…
View article: First Measurement of the $D_s^+\rightarrow K^0μ^+ν_μ$ Decay
First Measurement of the $D_s^+\rightarrow K^0μ^+ν_μ$ Decay Open
We report the first measurement of the semileptonic decay $D^+_s \rightarrow K^0μ^+ν_μ$, using a sample of $e^+e^-$ annihilation data corresponding to an integrated luminosity of $7.33~\mathrm{fb}^{-1}$ collected at center-of-mass energies…
View article: Observation of a resonance-like structure near the $π^+π^-$ mass threshold in $ψ(3686) \rightarrow π^{+}π^{-}J/ψ$
Observation of a resonance-like structure near the $π^+π^-$ mass threshold in $ψ(3686) \rightarrow π^{+}π^{-}J/ψ$ Open
Based on the $(2712.4\pm14.4)\times 10^{6}$ $ψ(3686)$ events collected with the BESIII detector, we present a high-precision study of the $π^+π^-$ mass spectrum in $ψ(3686)\rightarrowπ^{+}π^{-}J/ψ$ decays. A clear resonance-like structure …
View article: Observation of transverse polarization and determination of psionic form factors of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">Λ</mml:mi></mml:math> hyperon at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msqrt><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:msqrt><mml:mo>=</mml:mo><mml:mn>3.773</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>GeV</mml:mi></mml:mrow></mml:math>
Observation of transverse polarization and determination of psionic form factors of the hyperon at Open
Using a data sample of e+e− collision data corresponding to an integrated luminosity of 20.3 fb−1 collected by the BESIII detector at the BEPCII collider, we present an observation of transverse polarization and a complete determination o…
View article: First Observation of $Λ$ Hyperon Transverse Polarization in $ψ(3686)\toΛ\barΛ$
First Observation of $Λ$ Hyperon Transverse Polarization in $ψ(3686)\toΛ\barΛ$ Open
Based on $(448.1\pm2.9)\times10^{6}$ $ψ(3686)$ events collected with the BESIII detector at the BEPCII collider, we present the first observation of spin transverse polarization of $Λ$ and $\barΛ$ hyperons produced coherently in the decay …
View article: Observation of the electromagnetic radiative decays of the \boldmath{$Λ(1520)$} and \boldmath{$Λ(1670)$} to \boldmath{$γΣ^0$}
Observation of the electromagnetic radiative decays of the \boldmath{$Λ(1520)$} and \boldmath{$Λ(1670)$} to \boldmath{$γΣ^0$} Open
Using $(10087\pm 44)\times10^6$ $J/ψ$ events collected with the BESIII detector, we report the first observation of the electromagnetic radiative decays of the $Λ(1520)$ and $Λ(1670)$ to $γΣ^0$, with a statistical significance of $16.6σ$ a…
View article: Measurement of the branching fractions of doubly Cabibbo-suppressed D decays
Measurement of the branching fractions of doubly Cabibbo-suppressed D decays Open
A bstract 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 measure the branching fractions of the doubly Cabibbo…
View article: Evidence of doubly OZI-suppressed decay <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>η</mml:mi><mml:mi>c</mml:mi></mml:msub><mml:mo stretchy="false">→</mml:mo><mml:mi>ω</mml:mi><mml:mi>ϕ</mml:mi></mml:math> in the radiative decay <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>γ</mml:mi><mml:msub><mml:mi>η</mml:mi><mml:mi>c</mml:mi></mml:msub></mml:math>
Evidence of doubly OZI-suppressed decay in the radiative decay Open
Using a sample of (10087±44)×106 J/ψ events collected with the BESIII detector at the BEPCII collider, the first evidence for the doubly Okubo-Zweig-Iizuka (OZI)-suppressed decay ηc→ωϕ is reported with a significance of 4.0σ. The branchin…
View article: Measurements of the absolute branching fractions of the doubly Cabibbo-suppressed decays $D^+\to K^+π^0$, $D^+\to K^+η$ and $D^+\to K^+η^{\prime}$
Measurements of the absolute branching fractions of the doubly Cabibbo-suppressed decays $D^+\to K^+π^0$, $D^+\to K^+η$ and $D^+\to K^+η^{\prime}$ Open
Using $20.3\,\rm fb^{-1}$ 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 branching fractions of the doubly Cabibbo-suppressed decays $D^+\…
View article: Observation of Charmonium <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>h</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math> Radiative Decays to Multiple Light Hadrons and the Tensor State <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>f</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:mo stretchy="false">(</mml:mo><mml:mn>1270</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math>
Observation of Charmonium Radiative Decays to Multiple Light Hadrons and the Tensor State Open
Using ψ(3686)→π0hc decays from a data sample of (27.12±0.14)×108 ψ(3686) events collected by the BESIII detector at the BEPCII collider, hc radiative decays to multiple light hadrons below 2.8 GeV/c2—γπ+π−, γπ+π−η, γ2(π+π−), and γpp¯—are…
View article: First measurement of $Σ^{+}n\rightarrowΛp$ and $Σ^{+}n\rightarrowΣ^{0}p$ cross-sections via $Σ^+$-nucleus scattering at an electron-positron collider
First measurement of $Σ^{+}n\rightarrowΛp$ and $Σ^{+}n\rightarrowΣ^{0}p$ cross-sections via $Σ^+$-nucleus scattering at an electron-positron collider Open
Using $(1.0087\pm0.0044)\times10^{10}$ $J/ψ$ events collected with the BESIII detector at the BEPCII storage ring, the reactions $Σ^{+}n\rightarrowΛp$ and $Σ^{+}n\rightarrowΣ^{0}p$ are studied, where the $Σ^{+}$ baryon is produced in the p…
Observation of the -Annihilation Process and Measurement of in Decays Open
View article: Partial Wave Analysis of $e^{+}e^{-} \rightarrow π^{+}π^{-}J/ψ$ and Cross Section Measurement of $e^{+}e^{-} \rightarrow π^{\pm}Z_{c}(3900)^{\mp}$ from 4.1271 to 4.3583 GeV
Partial Wave Analysis of $e^{+}e^{-} \rightarrow π^{+}π^{-}J/ψ$ and Cross Section Measurement of $e^{+}e^{-} \rightarrow π^{\pm}Z_{c}(3900)^{\mp}$ from 4.1271 to 4.3583 GeV Open
Based on 12.0 $\mathrm{fb^{-1}}$ of $e^{+}e^{-}$ collision data samples collected by the BESIII detector at center-of-mass energies from 4.1271 to 4.3583 GeV, a partial wave analysis is performed for the process $e^{+}e^{-} \rightarrow π^{…
View article: Observation of $χ_{cJ}(J=0,1,2)\rightarrow p\bar{p}ηη$
Observation of $χ_{cJ}(J=0,1,2)\rightarrow p\bar{p}ηη$ Open
Using $(2712.4\pm14.3)\times10^6$ $ψ(3686)$ events collected by the BESIII detector operating at the BEPCII storage ring, the decays $χ_{cJ}(J=0,1,2)\rightarrow p\bar{p}ηη$ are observed for the first time through the radiative transition $…
View article: Observation of the Charmonium Decay <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>η</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub><mml:mo stretchy="false">→</mml:mo><mml:mi>γ</mml:mi><mml:mi>γ</mml:mi></mml:mrow></mml:math> in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>γ</mml:mi><mml:msub><mml:mrow><mml:mi>η</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>
Observation of the Charmonium Decay in Open
Using (2712.4±14.3)×106 ψ(3686) events collected with the BESIII detector at the BEPCII collider, the decay ηc→γγ in J/ψ→γηc is observed. We determine the product branching fraction B(J/ψ→γηc)×B(ηc→γγ)=(5.23±0.26stat±0.30syst)×10−6. This …
View article: Observation of $ψ(3686) \to Ξ^- K^0_S \barΩ^+ $+c.c
Observation of $ψ(3686) \to Ξ^- K^0_S \barΩ^+ $+c.c Open
Using a sample of $(2.712\pm0.014) \times 10^{9}$ $ψ(3686)$ events collected with the BESIII detector at the electron positron collider BEPCII, the decay $ψ(3686) \to Ξ^- K^0_S \barΩ^+ +c.c.$ is observed for the first time, which has a sig…
View article: Evidence for Two Excited <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi mathvariant="normal">Ω</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math> Hyperons
Evidence for Two Excited Hyperons Open
Using e+e− collision data corresponding to an integrated luminosity of 19 fb−1 collected by the BESIII detector at center-of-mass energies ranging from 4.13 to 4.70 GeV, we report the first evidence for a new excited Ω− hyperon, the Ω(210…
Search for and measurement of in radiative decays Open
View article: Search for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">Λ</mml:mi><mml:mo>−</mml:mo><mml:mover accent="true"><mml:mi mathvariant="normal">Λ</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover></mml:math> oscillation in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi mathvariant="normal">Λ</mml:mi><mml:mover accent="true"><mml:mi mathvariant="normal">Λ</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover></mml:math> decay
Search for oscillation in decay Open
Using (10087±44)×106 J/ψ decays collected by the BESIII detector at the BEPCII collider, we search for baryon number violation via Λ−Λ¯ oscillation in the decay J/ψ→ΛΛ¯. No evidence for Λ−Λ¯ oscillation is observed. The upper limit on the…
View article: First observation of $Λ_{c}(2595)^{+} \to Λ^{+}_{c}π^0π^0$ and $Λ_{c}(2625)^{+}\to Λ^{+}_{c}π^0π^0$
First observation of $Λ_{c}(2595)^{+} \to Λ^{+}_{c}π^0π^0$ and $Λ_{c}(2625)^{+}\to Λ^{+}_{c}π^0π^0$ Open
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 with the BESIII detector, we report the first observation …