F. Bianchi
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View article: Precision measurement of the branching fraction for the decay $ψ(2S)\rightarrowτ^{+}τ^{-}$
Precision measurement of the branching fraction for the decay $ψ(2S)\rightarrowτ^{+}τ^{-}$ Open
Using $(2259.3 \pm 11.1)\times10^{6}$ $ψ(2S)$ events acquired with the BESIII detector, the branching fraction of $ψ(2S)\rightarrowτ^{+}τ^{-}$ is measured with improved precision to be $\mathcal{B}_{ψ(2S)\rightarrowτ^{+}τ^{-}}=(3.240~\pm~0…
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: Measurement of $B \to K{}^{*}(892)\gamma$ decays at Belle II
Measurement of $B \to K{}^{*}(892)\gamma$ decays at Belle II Open
We present measurements of $B \to K{}^{*}(892)\gamma$ decays using $365\,{\rm fb}^{-1}$ of data collected from 2019 to 2022 by the Belle~II experiment at the SuperKEKB asymmetric-energy $e^+e^-$ collider. The data sample contains $(387 \pm…
View article: Extracting the femtometer structure of strange baryons using the vacuum polarization effect
Extracting the femtometer structure of strange baryons using the vacuum polarization effect Open
One of the fundamental goals of particle physics is to gain a microscopic understanding of the strong interaction. Electromagnetic form factors quantify the structure of hadrons in terms of charge and magnetization distributions. While the…
View article: Measurements of Born Cross Sections for $e^+e^-\to Λ_{c}^+ \barΛ_{c}(2595)^- + {\rm c.c.}$ and $e^+e^-\to Λ_{c}^+ \barΛ_{c}(2625)^- + {\rm c.c.}$ at $\sqrt{s}=$4918.0 and 4950.9 MeV
Measurements of Born Cross Sections for $e^+e^-\to Λ_{c}^+ \barΛ_{c}(2595)^- + {\rm c.c.}$ and $e^+e^-\to Λ_{c}^+ \barΛ_{c}(2625)^- + {\rm c.c.}$ at $\sqrt{s}=$4918.0 and 4950.9 MeV Open
Using $e^+e^-$ collision data collected with the BESIII detector operating at the BEPCII collider, the Born cross sections of $e^+e^-\to Λ_{c}^+ \barΛ_{c}(2595)^- + \rm{c.c.}$ and $e^+e^-\to Λ_{c}^+ \barΛ_{c}(2625)^- + \rm{c.c.}$ are measu…
View article: Determination of spin-parity quantum numbers of X(2370) as $0^{-+}$ from $J/ψ\rightarrowγK^{0}_{S}K^{0}_{S}η^{\prime}$
Determination of spin-parity quantum numbers of X(2370) as $0^{-+}$ from $J/ψ\rightarrowγK^{0}_{S}K^{0}_{S}η^{\prime}$ Open
Based on $(10087\pm44)\times10^{6}$ $J/ψ$ events collected with the BESIII detector, a partial wave analysis of the decay $J/ψ\rightarrowγK^{0}_{S}K^{0}_{S}η^{\prime}$ is performed. The mass and width of the $X(2370)$ are measured to be $2…
View article: Measurement of the $e^{+}e^{-} \to K_{S}^{0} K_{L}^{0} π^{0}$ cross sections from $\sqrt{s}=$ 2.000 to 3.080 GeV
Measurement of the $e^{+}e^{-} \to K_{S}^{0} K_{L}^{0} π^{0}$ cross sections from $\sqrt{s}=$ 2.000 to 3.080 GeV Open
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 $e^{+}e^{-}\to K_{S}^{0} K_{L}^{0} π^{0}$…
View article: Search for the semi-muonic charmonium decay $J/ψ\to D^{-}μ^{+}ν_μ+c.c.$
Search for the semi-muonic charmonium decay $J/ψ\to D^{-}μ^{+}ν_μ+c.c.$ Open
Using $(10087\pm44)\times10^{6}$ $J/ψ$ events collected with the BESIII detector at the BEPCII $e^+e^-$ storage ring at the center-of-mass energy of $\sqrt{s}=3.097~\rm{GeV}$, we present a search for the rare semi-muonic charmonium decay $…
View article: Test of $C\!P$ Symmetry in Hyperon to Neutron Decays
Test of $C\!P$ Symmetry in Hyperon to Neutron Decays Open
The quantum entangled $J/ψ\to Σ^{+}\barΣ^{-}$ pairs from $(1.0087\pm0.0044)\times10^{10}$ $J/ψ$ events taken by the BESIII detector are used to study the non-leptonic two-body weak decays $Σ^{+} \to n π^{+}$ and $\barΣ^{-} \to \bar{n} π^{-…
View article: Measurement of e+e− → ωπ+π− cross section at $$ \sqrt{s} $$ = 2.000 to 3.080 GeV
Measurement of e+e− → ωπ+π− cross section at $$ \sqrt{s} $$ = 2.000 to 3.080 GeV Open
A bstract A partial wave analysis on the process e + e − → ωπ + π − is performed using 647 pb − 1 of data sample collected by using the BESIII detector operating at the BEPCII storage ring at center-of-mass (c.m.) energies from 2.000 GeV t…
View article: Search for the weak decay *
Search for the weak decay * Open
Using events collected with the BESIII detector, we perform the first search for the weak baryonic decay . The analysis procedure is optimized using a blinded method. No significant signal is observed, and the upper limit on the branchi…
View article: A Cylindrical GEM Inner Tracker for the BESIII experiment at IHEP
A Cylindrical GEM Inner Tracker for the BESIII experiment at IHEP Open
The Beijing Electron Spectrometer III (BESIII) is a multipurpose detector that collects data provided by the collision in the Beijing Electron Positron Collider II (BEPCII), hosted at the Institute of High Energy Physics of Beijing. Since …
View article: A new inner tracker based on GEM detectors for the BES III experiment
A new inner tracker based on GEM detectors for the BES III experiment Open
A new inner tracker based on a cylindrical gas electron-multiplier detector is under development to replace the current inner drift chamber of the BES III spectrometer. The BES III experiment is carried out at the BEPC II e[Formula: see te…
View article: The Cylindrical GEM Inner Tracker of the BESIII experiment: prototype test beam results
The Cylindrical GEM Inner Tracker of the BESIII experiment: prototype test beam results Open
A cylindrical GEM detector is under development, to serve as an upgraded inner tracker at the BESIII spectrometer. It will consist of three layers of cylindrically-shaped triple GEMs surrounding the interaction point. The experiment is tak…
View article: Development and test of a μTPC cluster reconstruction for a triple GEM detector in strong magnetic field
Development and test of a μTPC cluster reconstruction for a triple GEM detector in strong magnetic field Open
Performance of triple GEM prototypes has been evaluated by means of a muon beam at the H4 line of the SPS test area at CERN. The data from two planar prototypes have been reconstructed and analyzed offline with two clusterization methods: …