X. S. Qin

Precise Measurement of the Chromoelectric Dipole Moment of the Charm Quark

M. Ablikim, M. N. Achasov, P. Adlarson, Xi‐Cheng Ai et autres

The combined symmetry of charge conjugation and parity (CP) is tested in the hadronic transition ψ(3686)→π^{+}π^{-}J/ψ, using a dataset of (2712.4±14.3)×10^{6} ψ(3686) events collected by the BESIII detector at the BEPCII collider. The resulting asymmetry observable is A_{CP}=(0.6±1.8±0.1)×10^{-4}, which is determined by …

ru, se, cn, de, it, pl, mn, us, tr, kr, gb (code pays fourni par la source)

Evidence of transverse polarization of the Ξ 0 hyperon in ψ ( 3686 ) → Ξ 0 Ξ ¯ 0

M. Ablikim, M. N. Achasov, P. Adlarson, X. Ai et autres

Using ( 2.712 ± 0.014 ) × 10 9 ψ ( 3686 ) events collected with the BESIII detector at the BEPCII collider, we report an evidence of Ξ 0 transverse polarization with a significance of 4.4 σ , a precise measurement …

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First measurement of the absolute branching fractions of $Σ^+$ nonleptonic decays and test of the $ΔI = 1/2$ rule

BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson et autres

Based on $(10087 \pm 44) \times 10^6$ $J/ψ$ events collected by the BESIII detector at the center-of-mass energy $\sqrt{s} = 3.097$ GeV, the first absolute measurement of the branching fractions for the decays $Σ^+ \to p π^0$ and $Σ^+ \to n π^+$ …

Observation of D + → K S 0 π 0 μ + ν μ , Test of Lepton Flavor Universality, and First Angular Analysis of D + → K ¯ * ( 892 ) 0 ℓ + ν ℓ

M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai et autres

We report a study of the semileptonic decays D^{+}→K_{S}^{0}π^{0}ℓ^{+}ν_{ℓ} (ℓ=e, μ) based on 20.3 fb^{-1} of e^{+}e^{-} collision data collected at the center-of-mass energy of 3.773 GeV with the BESIII detector. The D^{+}→K_{S}^{0}π^{0}μ^{+}ν_{μ} decay is observed for the first time, with a …

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First Observation of $Λ$ Hyperon Transverse Polarization in $ψ(3686)\toΛ\barΛ$

BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson et autres

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 $ψ(3686)\toΛ(\to pπ^-)\barΛ(\to\bar pπ^+)$. The relative phase between the electric …

Measurement of the space-like $π^0$ transition form factor

BESIII Collaboration, M. Ablikim, М. Н. Ачасов, P. Adlarson et autres

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 $e^+e^-\to e^+e^-π^0$ is investigated using a single-tag approach. The differential Born cross section $\text{d}σ/\text{d}Q^2$ and the space-like transition form factor …

Observation of an Altered $a_{0}(980)$ Line-shape in $D^{+} \rightarrow π^{+}ηη$ due to the Triangle Loop Rescattering Effect

BESIII Collaboration, М. Н. Ачасов, P. Adlarson, X. C. Ai et autres

Using 20.3~${\rm fb}^{-1}$ 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 hadronic decay $D^{+} \rightarrow π^{+}ηη$. The intermediate process $D^{+} \to a_{0}(980)^{+}η, a_{0}(980)^{+} \to π^{+}η$ is observed and …

Observation of the decay ψ ( 3686 ) → Σ 0 Σ ¯ 0 ω

M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai et autres

Using a dataset of ( 27.12 ± 0.14 ) × 10 8 ψ ( 3686 ) events collected by the BESIII detector operating at the BEPCII collider, we report the first observation of the decay ψ ( 3686 ) → Σ 0 …

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Observation of $$ \psi (3686)\to {K}^{-}\Lambda (1520){\overline{\Xi}}^{+} $$ + c.c.

M. Ablikim, M. N. Achasov, P. Adlarson, O. Afedulidis et autres

A bstract Based on (2712 . 4 ± 14 . 3) × 10 6 ψ (3686) events collected at the BESIII detector operating at the BEPCII collider, we present the first observation of the decay $$ \psi (3686)\to {K}^{-}\Lambda (1520){\overline{\Xi}}^{+} $$ ψ …

ru, se, de, cn, it, pl, us, tr, kr (code pays fourni par la source)

Amplitude analysis of $ψ(3686)\to γK_S^0 K_S^0 $

BESIII Collaboration, M. N. Achasov, P. Adlarson, X. Ai et autres

Using $(2712\pm14)\times10^6$ $ψ(3686)$ events collected with the BESIII detector, we perform the first amplitude analysis of the radiative decay $ψ(3686)\to γK_S^0 K_S^0$ within the mass region $M_{K_S^0 K_S^0 }<2.8$ GeV/$c^2$. Employing a one-channel K-matrix approach for the description of the dynamics of …

Study of D s + → f 0 ( 980 ) ρ + and ϕ π + Decays through D s + → π + π + π − π 0

M. Ablikim, M. N. Achasov, P. Adlarson, O. Afedulidis et autres

We perform the first amplitude analysis of D_{s}^{+}→π^{+}π^{+}π^{-}π^{0} decays based on data samples of electron-positron collisions recorded with the BESIII detector at center-of-mass energies between 4.128 and 4.226 GeV, corresponding to an integrated luminosity of 7.33 fb^{-1}. We report the observation of …

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Observation of χ c 0 → Σ + Σ ¯ − η and evidence for χ c 1 , 2 → Σ + Σ ¯ − η

M. Ablikim, M. N. Achasov, P. Adlarson, O. Afedulidis et autres

Using ( 27.12 ± 0.14 ) × 10 8 ψ ( 3686 ) events collected with the BESIII detector, the decay χ c 0 → Σ + Σ ¯ − η is observed for the first time with a signal significance of …

cn, ru, se, de, it, pl, mn, us, tr, kr (code pays fourni par la source)