
C. Z. YuanChinese Academy of Sciences | CAS · Division for Experimental Physics
C. Z. Yuan
Ph.D, Professor of Physics
About
481
Publications
139,615
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
21,762
Citations
Introduction
Additional affiliations
January 2012 - present
January 2011 - present
January 2009 - December 2012
Publications
Publications (481)
The Beijing Spectrometer (BESIII) collaboration uses $e^+e^-$ collisions in the tau-charm energy region to study a broad spectrum of topics. These include studies of light mesons and light baryons, studies of charmonium, including exotic mesons and baryons containing charmonium, studies of charmed mesons and baryons, studies of QCD and tau physics,...
Using a data sample of 921.9 fb−1 collected with the Belle detector, we study the process of e+e−→Ds+Ds1(2536)−+c.c. via initial-state radiation. We report the first observation of a vector charmoniumlike state decaying to Ds+Ds1(2536)−+c.c. with a significance of 5.9σ, including systematic uncertainties. The measured mass and width are (4625.9−6.0...
We report the first determination of the absolute branching fractions of the X(3872) decays by globally analyzing the measurements provided by the Belle, BABAR, BESIII, and LHCb experiments. The branching fractions of X(3872)→π+π−J/ψ and D*0D¯0+c.c. are found to be (4.1−1.1+1.9)% and (52.4−14.3+25.3)%, respectively. The branching fractions of the d...
Using a data sample of 921.9 fb$^{-1}$ collected with the Belle detector, we study the process of $e^+e^-\to D^+_sD_{s1}(2536)^-+c.c.$ via initial-state radiation. We report the first observation of a vector charmoniumlike state decaying to $D^+_sD_{s1}(2536)^-+c.c.$ with a significance of 5.9$\sigma$, including the systematic uncertainties. The me...
We report the first determination of the absolute branching fractions of the X(3872) decays by globally analyzing the measurements provided by the Belle, BaBar, BESIII, and LHCb experiments. The branching fractions of X(3872) to pi^+pi^- J/psi and D*0D0bar+c.c. are found to be (4.1^{+1.9}_{-1.1})% and (52.4^{+25.3}_{-14.3})%, respectively. The bran...
The quark model was formulated in 1964 to classify mesons as bound states made of a quark-antiquark pair, and baryons as bound states made of three quarks. For a long time all known mesons and baryons could be classified within this scheme. Quantum Chromodynamics (QCD), however, in principle also allows the existence of more complex structures, gen...
We present the first measurements of absolute branching fractions of Ξc0 decays into Ξ−π+, ΛK−π+, and pK−K−π+ final states. The measurements are made using a dataset comprising (772±11)×106BB¯ pairs collected at the ϒ(4S) resonance with the Belle detector at the KEKB e+e− collider. We first measure the absolute branching fraction for B−→Λ¯c−Ξc0 usi...
Using data samples of 89.5 fb−1, 711.0 fb−1, and 121.4 fb−1 collected with the Belle detector at the KEKB asymmetric-energy e+e− collider at center-of-mass energies 10.52, 10.58, and 10.867 GeV, respectively, we study the exclusive reactions e+e−→γχcJ (J=0, 1, 2) and e+e−→γηc. A significant γχc1 signal is observed for the first time at s=10.58 GeV...
We present the first measurements of absolute branching fractions of $\Xi_c^0$ decays into $\Xi^- \pi^+$, $\Lambda K^- \pi^+$, and $p K^- K^- \pi^+$ final states. The measurements are made using a data set comprising $(772\pm 11)\times 10^{6}$ $B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB $e^+e^-$ co...
We report searches for the processes e+e−→π+π−π0χbJ and e+e−→ϕχbJ (J=1, 2) based on data samples collected by the Belle experiment at the KEKB collider. We report the first observation of the process e+e−→(π+π−π0)non−ωχb1 and first evidence for e+e−→ωχbJ in the vicinity of the ϒ(11020) resonance, with center-of-mass energies from 10.96 to 11.05 GeV...
Using data samples of 89.5~fb$^{-1}$, 711.0~fb$^{-1}$, and 121.4~fb$^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider at center-of-mass energies 10.52 GeV, 10.58 GeV, and 10.867 GeV, respectively, we study the exclusive reactions $e^+e^-\to\gamma\chi_{cJ}$ ($J = 0,~1,~2$) and $e^+e^-\to\gamma\eta_c$. A signifi...
We report searches for the processes $e^+e^-\to\pi^+\pi^-\pi^0\chi_{bJ}$ and $e^+e^-\to\phi\chi_{bJ}$ (J=1,2) in the vicinity of the $\Upsilon(11020)$ resonance using energy scan data collected by the Belle experiment at the KEKB collider. We observe $e^+e^-\to \pi^+\pi^-\pi^0\chi_{b1}$ and find evidence for $e^+e^-\to \omega\chi_{b2}$ processes fo...
The first search for double charged charmoniumlike state production in ϒ(1S) and ϒ(2S) decays and in e+e− annihilation at s=10.52, 10.58, and 10.867 GeV is conducted using data collected with the Belle detector at the KEKB asymmetric energy electron-positron collider. No significant signals are observed in any of the studied modes, and the 90% cred...
The first search for $Z_{c}$ pair production in $\Upsilon(1S)$ and $\Upsilon(2S)$ decays and in $e^{+}e^{-}$ annihilation at $\sqrt{s}$ = 10.52, 10.58, and 10.867 GeV is conducted using data collected with the Belle detector at the KEKB asymmetric energy electron-positron collider. No significant signals are observed in any of the studied modes, an...
We search for the JPC=0−− and 1+− light tetraquark states with masses up to 2.46 GeV/c2 in ϒ(1S) and ϒ(2S) decays with data samples of (102±2) million and (158±4) million events, respectively, collected with the Belle detector. No significant signals are observed in any of the studied production modes, and 90% credibility level (C.L.) upper limits...
We search for the $J^{PC}=0^{--}$ and $1^{+-}$ light tetraquark states with masses up to 2.46~GeV/$c^2$ in $\Upsilon(1S)$ and $\Upsilon(2S)$ decays with data samples of $(102\pm 2)$ million and $(158\pm 4)$ million events, respectively, collected with the Belle detector. No significant signals are observed in any of the studied production modes, an...
We report the first search for the JPC=0−− glueball in ϒ(1S) and ϒ(2S) decays with data samples of (102±2)×106 and (158±4)×106 events, respectively, collected with the Belle detector. No significant signals are observed in any of the proposed production modes, and the 90% credibility level upper limits on their branching fractions in ϒ(1S) and ϒ(2S...
We report the first search for the $J^{PC}=0^{--}$ glueball in $\Upsilon(1S)$ and $\Upsilon(2S)$ decays with data samples of $(102\pm2)$ million and $(158\pm4)$ million events, respectively, collected with the Belle detector. No significant signals are observed in any of the proposed production modes, and the 90\% credibility level upper limits on...
The process γγ→ppK+K- and its intermediate processes are measured for the first time using a 980 fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The production of ppK+K- and a Λ(1520)0 (Λ(1520)0) signal in the pK- (pK+) invariant mass spectrum are clearly observed. However, no evidence for an exotic b...
The branching fractions of the υ (1S) inclusive decays into final states with a J/ψ or a ψ(2S) are measured with improved precision to be B(υ (1S)→J/ψ+anything)=(5.25±0.13(stat)±0.25(syst))×10-4 and B(υ (1S)→ψ(2S)+anything)=(1.23±0.17(stat)±0.11(syst))×10-4. The first search for υ (1S) decays into XYZ states that decay into a J/ψ or a ψ(2S) plus on...
The branching fractions of the $\Upsilon(1S)$ inclusive decays into final states with a $J/\psi$ or a $\psi(2S)$ are measured with improved precision to be $\BR(\Upsilon(1S)\to J/\psi + {\rm anything})=(5.25\pm 0.13(\mathrm{stat.})\pm 0.25(\mathrm{syst.}))\times 10^{-4}$ and $\BR(\Upsilon(1S)\to \psi(2S) + {\rm anything})=(1.23\pm 0.17(\mathrm{stat...
The process $\gamma \gamma \to p \bar{p} K^+ K^-$ and its intermediate processes are measured for the first time using a 980~fb$^{-1}$ data sample collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. The production of $p \bar{p} K^+ K^-$ and a $\Lambda(1520)^0~(\bar{\Lambda}(1520)^0)$ signal in the $pK^-$~($\bar{p} K^+...
We report the first search for the $J^{PC}=0^{--}$ glueball in $\Upsilon(1S)$ and $\Upsilon(2S)$ decays with data samples of $(102\pm2)$ million and $(158\pm4)$ million events, respectively, collected with the Belle detector. No significant signals are observed in any of the proposed production modes, and the 90\% credibility level upper limits on...
The last few years have been witness to a proliferation of new results
concerning heavy exotic hadrons. Experimentally, many new signals have been
discovered that could be pointing towards the existence of tetraquarks,
pentaquarks, and other exotic configurations of quarks and gluons.
Theoretically, advances in lattice field theory techniques place...
With the recent measurements of ψ′ and J/ψ decay into octet-baryon pairs, we study the relative phase between the strong and the electromagnetic amplitudes, and find a large phase by fitting the present data. The fits take into account the details of experimental effects, including energy spread and initial state radiation. We also predict some bra...
The process e(+)e(-) -> gamma chi(cJ) (J = 1, 2) is studied via initial state radiation using 980 fb(-1) of data at and around the Gamma(nS) (n = 1, 2, 3, 4, 5) resonances collected with the Belle detector at the KEKB asymmetricenergy e(+)e(-) collider. No significant signal is observed except from psi(2S) decays. Upper limits on the cross sections...
The process $e^+e^- \to \gamma\chi_{cJ}$ ($J$=1, 2) is studied via initial
state radiation using 980 fb$^{-1}$ of data at and around the $\Upsilon(nS)$
($n$=1, 2, 3, 4, 5) resonances collected with the Belle detector at the KEKB
asymmetric-energy $e^+e^-$ collider. No significant signal is observed except
from $\psi(2S)$ decays. Upper limits on the...
An amplitude analysis of the $\pi^{0}\pi^{0}$ system produced in radiative
$J/\psi$ decays is presented. In particular, a piecewise function that
describes the dynamics of the $\pi^{0}\pi^{0}$ system is determined as a
function of $M_{\pi^{0}\pi^{0}}$ from an analysis of the
$(1.311\pm0.011)\times10^{9}$ $J/\psi$ decays collected by the BESIII dete...
We present an extraction of azimuthal correlations between two pairs of
charged pions detected in opposite jets from electron-positron annihilation.
These correlations may arise from the dependence of the di-pion fragmentation
on the polarization of the parent quark in the process $e^+e^- \rightarrow q
\bar{q}$. Due to the correlation of the quark...
Using a sample of 1.31 billion $J/\psi$ events collected with the BESIII
detector at the BEPCII collider, the decays $J/\psi \to \phi
\pi^{+}\pi^{-}\pi^{0}$ and $J/\psi \to \phi \pi^{0}\pi^{0}\pi^{0}$ are
investigated. The isospin violating decay $J/\psi \to \phi \pi^{0} f_{0}(980)$
with $f_{0}(980) \to \pi\pi$, is observed for the first time. The...
We report a measurement of the time-dependent CP asymmetry of B0->D(*)CP h0
decays, where the light neutral hadron h0 is a pi0, eta or omega meson, and the
neutral D meson is reconstructed in the CP eigenstates K+ K-, K0S pi0 or K0S
omega. The measurement is performed combining the final data samples collected
at the Y(4S) resonance by the BaBar an...
Using $2.92$ fb$^{-1}$ of electron-positron annihilation data collected at
$\sqrt{s} = 3.773$~GeV with the BESIII detector, we report the results of a
search for the flavor-changing neutral current process $D^0\to\gamma\gamma$
using a double-tag technique. We find no signal and set an upper limit at
$90\%$ confidence level for the branching fractio...
Using the data sets taken at center-of-mass energies above 4 GeV by the
BESIII detector at the BEPCII storage ring, we search for the reaction e+e- ->
gamma_ISR X(3872) -> gamma_ISR pi+pi-J/psi via the Initial State Radiation
technique. The production of a resonance with quantum numbers J^PC = 1^++ such
as the X(3872) via single photon e+e- annihil...
Using data samples collected at center of mass energies of $\sqrt{s}$ =
4.009, 4.226, 4.257, 4.358, 4.416 and 4.599 GeV with the BESIII detector
operating at the BEPCII storage ring, we search for the isospin violating decay
$Y(4260)\rightarrow J/\psi \eta \pi^{0}$. No signal is observed, and upper
limits on the cross section $\sigma(e^{+}e^{-}\rig...
We report a measurement of the branching fraction of
$\psi(3770)\to\gamma\chi_{c1}$ and search for the transition
$\psi(3770)\rightarrow \gamma \chi_{c2}$ based on 2.92~fb$^{-1}$ of $e^+e^-$
data accumulated at $\sqrt{s}=3.773$~GeV with the BESIII detector at the BEPCII
collider. The measured branching fraction of $\psi(3770) \rightarrow \gamma
\ch...
We report the first observation of the Dalitz decay $\eta' \to \gamma
e^+e^-$, based on a data sample of 1.31 billion $J/\psi$ events collected with
the BESIII detector. The $\eta'$ mesons are produced via the $J/\psi \to \gamma
\eta'$ decay process. The ratio $\Gamma(\eta' \to \gamma e^+
e^-)/\Gamma(\eta'\to\gamma\gamma)$ is measured to be
$(2.13\...
Using data samples collected with the BESIII detector at the BEPCII collider,
we measure the Born cross section of $e^{+}e^{-}\rightarrow p\bar{p}$ at 12
center-of-mass energies from 2232.4 to 3671.0 MeV. The corresponding effective
electromagnetic form factor of the proton is deduced under the assumption that
the electric and magnetic form factors...
Using a sample of $1.31$ billion $J/\psi$ events accumulated with the BESIII
detector at the BEPCII collider, we report the observation of the decay $J/\psi
\rightarrow \phi\pi^{0}$, which is the first evidence for a doubly
Okubo-Zweig-Iizuka suppressed electromagnetic $J/\psi$ decay. A clear structure
is observed in the $K^{+} K^{-}$ mass spectrum...
Using a sample of $1.06\times10^8\ \psip$ events produced in $e^+e^-$
collisions at $\sqrt{s}$ = 3.686 GeV and collected with the BESIII detector at
the BEPCII collider, we present studies of the decays $\klx+c.c.$ and
$\gklx+c.c.$. We observe two hyperons, $\Xi(1690)^-$ and $\Xi(1820)^-$, in the
$K^-\Lambda$ invariant mass distribution in the deca...
We report the observation of the $X(3823)$ in the process $e^+e^-\to
\pi^+\pi^-X(3823) \to \pi^+\pi^-\gamma\chi_{c1}$ with a statistical
significance of $6.2\sigma$, in data samples at center-of-mass energies
$\sqrt{s}=$4.230, 4.260, 4.360, 4.420 and 4.600~GeV collected with the BESIII
detector at the BEPCII electron positron collider. The measured...
Using data samples collected with the BESIII detector operating at the BEPCII
collider at center-of-mass energies from 3.810 to 4.600 GeV, we perform a study
of $e^{+}e^{-} \to \eta J/\psi$ and $\pi^0 J/\psi$. Statistically significant
signals of $e^{+}e^{-} \to \eta J/\psi$ are observed at $\sqrt{s}$ = 4.190,
4.210, 4.220, 4.230, 4.245, 4.260, 4.3...
Using a data sample of 106 million $\psi(3686)$ events collected with the
BESIII detector operated at the BEPCII storage ring, we study for the first
time the decay $\chi_{cJ}\to\phi K^{0}_S K^{\pm}\pi^{\mp}$ and
$\chi_{cJ}\to\phi K^{+} K^{-}\pi^{0}$ in the E1 radiative transition
$\psi(3686)\to\gamma\chi_{cJ}$. The decays are dominated by the thre...
From December 2011 to May 2014, about 5 $\rm fb^{-1}$ of data were taken with
the BESIII detector at center-of-mass energies between 3.810 GeV and 4.600 GeV
to study the charmoniumlike states and higher excited charmonium states. The
time integrated luminosity of the collected data sample is measured to a
precision of 1% by analyzing events produce...
Based on data samples collected with the BESIII detector at the BEPCII collider at nine center of mass energies from 4.21 to 4.42 GeV, we search for the production of e^{+}e^{-}→ωχ_{cJ} (J=0, 1, 2). The process e^{+}e^{-}→ωχ_{c0} is observed for the first time, and the Born cross sections at sqrt[s]=4.23 and 4.26 GeV are measured to be (55.4±6.0±5....
We present the first upper-limit measurement of the branching fractions of
the isospin-violating transitions $\chi_{c0,2} \rightarrow \pi^{0} \eta_{c}$.
The measurements are performed using $106\times 10^{6}$ $\psi(3686)$ events
accumulated with the BESIII detector at the BEPCII $e^{+}e^{-}$ collider at a
center-of-mass energy corresponding to the...
DOI:https://doi.org/10.1103/PhysRevD.91.039901
We report the first observation of $B^0 \to X(3872) (K^{+}\pi^{-})$ and
evidence for $B^+ \to X(3872) (K^{0}\pi^{+})$. We measure the product of
branching fractions for the former to be ${\cal B}(B^0 \to X(3872) (K^+ \pi^-))
\times {\cal B}(X(3872) \to J/\psi \pi^+ \pi^-) = (7.9 \pm 1.3(\mbox{stat.})\pm
0.4(\mbox{syst.})) \times 10^{-6}$ and find t...
We report a measurement of the parameter $y_{CP}$ in
$\ensuremath{D^0}\xspace-\ensuremath{\overline{D}^{0}}\xspace$ oscillations
performed by taking advantage of quantum coherence between pairs of
$\ensuremath{D^0}\xspace \ensuremath{\overline{D}^{0}}\xspace$ mesons produced
in $e^+e^-$ annihilations near threshold. In this work, doubly-tagged
$\en...
Based on a sample of $2.25\times 10^{8} J/\psi$ events taken with the BESIII
detector at the BEPCII collider, we present the results of a study of the decay
$J/\psi\to \eta \phi\pi^{+}\pi^{-}$. The $Y(2175)$ resonance is observed in the
invariant mass spectrum of $\phi f_{0}(980)$ with a statistical significance of
greater than $10\sigma$. The corr...
Using 482 pb$^{-1}$ of data taken at $\sqrt{s}=4.009$ GeV, we measure the
branching fractions of the decays of $D^{*0}$ into $D^0\pi^0$ and $D^0\gamma$
to be $\BR(D^{*0} \to D^0\pi^0)=(65.5\pm 0.8\pm 0.5)%$ and $\BR(D^{*0} \to
D^0\gamma)=(34.5\pm 0.8\pm 0.5)%$ respectively, by assuming that the $D^{*0}$
decays only into these two modes. The ratio o...
Using data samples collected at center-of-mass energies $\sqrt{s} = 4.23$,
4.26, and 4.36~GeV with the BESIII detector operating at the BEPCII storage
ring, we search for the production of the charmoniumlike state $Y(4140)$
through a radiative transition followed by its decay to $\phi J/\psi$. No
significant signal is observed and upper limits on $...
Using data samples collected at center-of-mass energies of $\sqrt{s}$ =
4.009, 4.230, 4.260, and 4.360 GeV with the BESIII detector operating at the
BEPCII collider, we perform a search for the process $e^+e^-\to\gamma\chi_{cJ}$
$(J = 0, 1, 2)$ and find evidence for $e^+e^-\to\gamma\chi_{c1}$ and
$e^+e^-\to\gamma\chi_{c2}$ with statistical signific...
Using data collected with the BESIII detector operating at the Beijing Electron Positron Collider at center-of-mass energies of sqrt[s]=4.23, 4.26, and 4.36 GeV, we observe e^{+}e^{-}→π^{0}π^{0}h_{c} for the first time. The Born cross sections are measured and found to be about half of those of e^{+}e^{-}→π^{+}π^{-}h_{c} within less than 2σ. In the...
This work is on the Physics of the B Factories. Part A of this book contains
a brief description of the SLAC and KEK B Factories as well as their detectors,
BaBar and Belle, and data taking related issues. Part B discusses tools and
methods used by the experiments in order to obtain results. The results
themselves can be found in Part C.
Please not...
Using a sample of $2.25\times 10^8$ $J/\psi$ events collected with the BESIII
detector at the BEPCII collider, we search for the $J/\psi$ semi-leptonic weak
decay $J/\psi \to D^{-}_{s} e^{+}\nu_{e}+c.c.$ with a much higher sensitivity
than previous searches. We also perform the first search for $J/\psi \to
D^{*-}_{s} e^{+}\nu_{e}+c.c.$ No significa...
We report measurement of the cross section of $e^+e^-\to \pi^+\pi^-\psi(2S)$
between 4.0 and $5.5 {\rm GeV}$, based on an analysis of initial state
radiation events in a $980 \rm fb^{-1}$ data sample recorded with the Belle
detector. The properties of the $Y(4360)$ and $Y(4660)$ states are determined.
Fitting the mass spectrum of $\pi^+\pi^-\psi(2S...
Based on data samples collected with the BESIII detector at the BEPCII
collider at 9 center-of-mass energies from 4.21 to 4.42 GeV, we search for the
production of $e^+e^-\to \omega\chi_{cJ}$ ($J$=0, 1, 2). The process $e^+e^-\to
\omega\chi_{c0}$ is observed for the first time, and the Born cross sections at
$\sqrt{s}$=4.23 and 4.26 GeV are measure...
X H He C P Shen C. Z. Yuan- [...]
A Zupanc
The e^{+}e^{-}→π^{+}π^{-}π^{0}χ_{bJ} (J=0,1,2) processes are studied using a 118 fb^{-1} data sample acquired with the Belle detector at a center-of-mass energy of 10.867 GeV. Unambiguous π^{+}π^{-}π^{0}χ_{bJ} (J=1,2), ωχ_{b1} signals are observed, and indication for ωχ_{b2} is seen, both for the first time, and the corresponding cross section meas...
Using data samples of $102\times10^6$ $\Upsilon(1S)$ and $158\times10^6$
$\Upsilon(2S)$ events collected with the Belle detector, a first experimental
search has been made for double-charmonium production in the exclusive decays
$\Upsilon(1S,2S)\rightarrow J/\psi(\psi')+X$, where $X=\eta_c$, $\chi_{cJ}
(J=~0,~1,~2)$, $\eta_c(2S)$, and X(3940). No s...
Using data collected with the BESIII detector operating at the Beijing
Electron Positron Collider at center-of-mass energies of $\sqrt{s}$=4.23, 4.26,
and 4.36 GeV, we observe $e^+e^-\to \pi^0\pi^0 h_c$ for the first time. The
Born cross sections are measured and found to be about half of those of $e^+e^-
\to \pi^+\pi^-h_c$ within less than 2$\sigm...
We report a measurement of the branching fraction of $B^+ \to \tau^+
\nu_\tau$ decays using a data sample of $772 \times 10^6 B \bar{B}$ pairs,
collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB
asymmetric-energy $e^+e^-$ collider. We reconstruct the accompanying $B$ meson
in a semileptonic decay and detect the $B^+ \to \...
Using $1.06\times10^8$ $\psi(3686)$ events recorded in $e^{+}e^{-}$
collisions at $\sqrt{s}=$ 3.686 GeV with the BESIII at the BEPCII collider, we
present searches for C-parity violation in $J/\psi \to \gamma\gamma$ and $
\gamma \phi$ decays via $\psi(3686) \to J/\psi \pi^+\pi^-$. No significant
signals are observed in either channel. Upper limits...
Using $2.25\times10^{8}$ $J/\psi$ events collected with the BESIII detector
at the BEPCII storage rings, we observe for the first time the process
$J/\psi\rightarrow p\bar{p}a_{0}(980)$, $a_{0}(980)\rightarrow \pi^{0}\eta$
with a significance of $6.5\sigma$ ($3.2\sigma$ including systematic
uncertainties). The product branching fraction of $J/\psi\...
The $e^+e^- \to \pi^+ \pi^- \pi^0 \chi_{bJ}$ ($J=0,~1,~2$) processes are
studied using a 118~fb$^{-1}$ data sample collected at a center-of-mass energy
of 10.867 GeV, in the $\Upsilon(10860)$ energy range, with the Belle detector.
The $\pi^+ \pi^- \pi^0 \chi_{b1}$, $\pi^+\pi^-\pi^0\chi_{b2}$,
$\omega\chi_{b1}$ signals and the evidence of $\omega\ch...
Using a sample of 1.3×10^{9} J/ψ events collected with the BESIII detector, we report the first observation of η^{'}→π^{+}π^{-}π^{+}π^{-} and η^{'}→π^{+}π^{-}π^{0}π^{0}. The measured branching fractions are B(η^{'}→π^{+}π^{-}π^{+}π^{-})=[8.53±0.69(stat.)±0.64(syst.)]×10^{-5} and B(η^{'}→π^{+}π^{-}π^{0}π^{0})=[1.82±0.35(stat.)±0.18(syst.)]×10^{-4},...
The process $e^+e^-\rightarrow p\overline{p}\pi^0$ has been studied by
analyzing data collected at $\sqrt{s}=3.773$ GeV, at $\sqrt{s}=3.650$ GeV, and
during a $\psi(3770)$ line shape scan with the BESIII detector at the BEPCII
collider. The Born cross section of $p \overline{p} \pi^0$ in the vicinity of
the $\psi(3770)$ is measured and the Born cro...
By using a 2.92 fb$^{-1}$ data sample taken at $\sqrt{s} = 3.773$ GeV with
the BESIII detector operating at the BEPCII collider, we search for the
radiative transitions $\psi(3770)\to\gamma\eta_c$ and $\gamma\eta_c(2S)$
through the hadronic decays $\eta_c(\eta_c(2S))\to K^0_SK^\pm\pi^\mp$. No
significant excess of signal events above background is...
With $1.06\times 10^8$ $\psi(3686)$ events collected with the BESIII
detector, the branching fraction of $\psi(3686) \to \omega K^+ K^-$ is measured
to be $(1.54 \pm 0.04 \pm 0.11) \times 10^{-4}$. This is the most precise
result to date, due to the largest $\psi(3686)$ sample, improved signal
reconstruction efficiency, good simulation of the detec...
An energy scan near the $\tau$ pair production threshold has been performed
using the BESIII detector. About $24$ pb$^{-1}$ of data, distributed over four
scan points, was collected. This analysis is based on $\tau$ pair decays to
$ee$, $e\mu$, $eh$, $\mu\mu$, $\mu h$, $hh$, $e\rho$, $\mu\rho$ and $\pi\rho$
final states, where $h$ denotes a charged...
We present measurements of the masses and decay widths of the baryonic states
$\Sigma_{c}(2455)^{0/++}$ and $\Sigma_{c}(2520)^{0/++}$ using a data sample
corresponding to an integrated luminosity of 711 fb$^{-1}$ collected with the
Belle detector at the KEKB $e^{+}e^{-}$ asymmetric-energy collider operating at
the $\Upsilon(4S)$ resonance. We repor...
We study $D^0\overline{D}{}^0$ pairs produced in $e^+e^-$ collisions at
$\sqrt{s}=3.773$ GeV using a data sample of 2.92 fb$^{-1}$ collected with the
BESIII detector. We measure the asymmetry $\mathcal{A}^{CP}_{K\pi}$ of the
branching fractions of $D \to K^-\pi^+$ in $CP$-odd and $CP$-even eigenstates
to be $(12.7\pm1.3\pm0.7)\times10^{-2}$. $\math...
We report a measurement of ${D^{0}}$-${\overline{D}{}^{0}}$ mixing parameters
and a search for indirect $CP$ violation through a time-dependent
amplitude analysis of ${D^0\to K_S^0\pi^+\pi^-}$ decays. The results are
based on 921~fb$