Based on a sample of $(2712.4\pm14.3)\times10^6\;\psi(3686)$ events collected
with the BESIII detector, a partial wave analysis of the decay
$\psi(3686)\to\Lambda\bar\Sigma^0\pi^0+c.c.$ is performed ...to investigate
$\Lambda^*$ and $\Sigma^*$ resonances in the $\pi^0\bar{\Sigma}^0$ and
$\pi^0\Lambda$ invariant mass distributions. Significant contributions are
found from the $\Lambda(1405)$, $\Lambda(1520)$, $\Lambda(1600)$,
$\Lambda(1670)$, $\Lambda(1690)$, $\Lambda(1800)$, $\Lambda(1890)$,
$\Lambda(2325)$, $\Sigma(1385)$, $\Sigma(1660)$, $\Sigma(1670)$,
$\Sigma(1750)$, and $\Sigma(1910)$. The masses, widths, and production
branching fractions for each component are determined. In addition, the
branching fraction of $\psi(3686)\to\Lambda\bar\Sigma^0\pi^0+c.c.$ is measured
to be $(1.544\pm0.013\pm0.069)\times10^{-4}$ for the first time, where the
first uncertainty is statistical and the second systematic.
By analyzing a data sample of $e^+e^-$ collisions with center-of-mass energy
$\sqrt{s}=3.773$ GeV, corresponding to an integrated luminosity of $7.9~\rm
{fb}^{-1}$ collected with the BESIII detector ...operating at the BEPCII collider,
we study semileptonic decays of the $D^{0(+)}$ mesons into the axial-vector
meson $b_1(1235)$ via the decay $b_1(1235)\to \omega\pi$. The decay $D^0\to
b_1(1235)^-e^{+}\nu_{e}$ is observed with a significance of 5.2$\sigma$ after
considering systematic uncertainty, while evidence for the decay $D^+\to
b_1(1235)^0 e^+\nu_e$ is obtained with a 3.1$\sigma$ significance. The product
branching fractions are determined to be ${\mathcal B}(D^0\to
b_{1}(1235)^-e^{+}\nu_{e})\times {\mathcal B} (b_1(1235)^-\to \omega \pi^-) =
(0.72\pm0.18^{+0.06}_{-0.08})\times10^{-4}$ and ${\mathcal B}(D^+\to
b_{1}(1235)^0e^{+}\nu_{e})\times {\mathcal B} (b_1(1235)^0~\to \omega \pi^0) =
(1.16\pm0.44\pm0.16)\times10^{-4}$, where the first uncertainties are
statistical and the second systematic. The ratio of their partial decay widths
is determined to be $\frac{\Gamma(D^0\to
b_{1}(1235)^-e^{+}\nu_{e})}{2\Gamma(D^+\to
b_{1}(1235)^0e^{+}\nu_{e})}=0.78\pm0.19^{+0.04}_{-0.05}$, which is consistent
with unity, predicted by isospin invariance, within uncertainties.
We perform the first investigation of the process $e^{+}e^{-}\to
K^+K^-\psi(2S)$ and report its Born cross sections over a range of
center-of-mass energies from 4.699 to 4.951~GeV. The measurements ...are carried
out using several partial reconstruction techniques using data samples
collected by the BESIII detector with a total integrated luminosity of
2.5~fb$^{-1}$. We search for new tetraquark candidates $Z_{cs}^\pm$ in the
decays $Z_{cs}^\pm\to K^\pm\psi(2S)$. No significant $Z_{cs}^\pm$ signals are
observed.
Abstract Eosinophilic granuloma (EG) refers to the most common and benign form of the disorder known as Langerhans’ cell histiocytosis. The disease is typically found in children and adolescents and ...rarely affects adults. We present a case of EG in the occipital bone in a 36-year-old man, who visited our hospital with the chief complaint of left occipital palpable tumor mass with local tenderness and pain for one month. An X-ray of the skull revealed a rounded osteolytic lesion. A computed tomography scan revealed a shadow of soft tissues in the left occipital site involving the entire thickness of the calvaria, which was indicative of marked destruction of the bone. The soft mass was successfully removed. The margins of the skull lesion were excised, and cranioplasty was performed simultaneously with bone cement. A definitive diagnosis of EG was made by histopathology and immunohistochemical detection of S-100 antigen in the tissue samples. With respect to management, we believe surgery is the best option for most accessible cranial lesions of EG. A cranioplasty with bone cement or autologous bone can be performed in the same session to repair the cranial defect.
The $e^+e^-\rightarrow D_s^+D_{s1}(2536)^-$ and $e^+e^-\rightarrow
D_s^+D^*_{s2}(2573)^-$ processes are studied using data samples collected with
the BESIII detector at center-of-mass energies from ...4.530 to 4.946~GeV. The
absolute branching fractions of $D_{s1}(2536)^- \rightarrow \bar{D}^{*0}K^-$
and $D_{s2}^*(2573)^- \rightarrow \bar{D}^0K^-$ are measured for the first time
to be $(35.9\pm 4.8\pm 3.5)\%$ and $(37.4\pm 3.1\pm 4.6)\%$, respectively. The
measurements are in tension with predictions based on the assumption that the
$D_{s1}(2536)$ and $D_{s2}^*(2573)$ are dominated by a bare $c\bar{s}$
component. The $e^+e^-\rightarrow D_s^+D_{s1}(2536)^-$ and $e^+e^-\rightarrow
D_s^+D^*_{s2}(2573)^-$ cross sections are measured, and a resonant structure at
around 4.6~GeV with a width of 50~MeV is observed for the first time with a
statistical significance of $15\sigma$ in the $e^+e^-\rightarrow
D_s^+D^*_{s2}(2573)^-$ process. It could be the $Y(4626)$ found by the Belle
collaboration in the $D_s^+D_{s1}(2536)^{-}$ final state, since they have
similar masses and widths. There is also evidence for a structure at around
4.75~GeV in both processes.
Using $(10087\pm44)\times10^6J/\psi$ events collected with the BESIII
detector, we search for the rare decay $J/\psi \to \gamma D^0+c.c.$ for the
first time. No obvious signal is observed and the ...upper limit on the branching
fraction is determined to be ${\cal B}(J/\psi \to \gamma D^{0}+c.c.)< 9.1
\times 10^{-8}$ at 90\% confidence level.
Exome-sequencing studies have generally been underpowered to identify deleterious alleles with a large effect on complex traits as such alleles are mostly rare. Because the population of northern and ...eastern Finland has expanded considerably and in isolation following a series of bottlenecks, individuals of these populations have numerous deleterious alleles at a relatively high frequency. Here, using exome sequencing of nearly 20,000 individuals from these regions, we investigate the role of rare coding variants in clinically relevant quantitative cardiometabolic traits. Exome-wide association studies for 64 quantitative traits identified 26 newly associated deleterious alleles. Of these 26 alleles, 19 are either unique to or more than 20 times more frequent in Finnish individuals than in other Europeans and show geographical clustering comparable to Mendelian disease mutations that are characteristic of the Finnish population. We estimate that sequencing studies of populations without this unique history would require hundreds of thousands to millions of participants to achieve comparable association power.
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 semileptonic decay $D^+_{s}\to K^0 e^+\nu_e$ to be
$(2.98\pm0.23\pm0.12)\times10^{-3}$. The $D_s^+\to K^0$ hadronic form factor is
determined from the differential decay rate of $D^+_s\to K^0 e^+\nu_e$ to be
$f^{K^0}_+(0)=0.636\pm0.049\pm0.013$. For both measurements, the first
uncertainty is statistical and the second systematic. The branching fraction
and form factor measurements are factors of 1.6 and 1.7 more precise than the
previous world averages, respectively.
We search for the hadronic decay $\eta_c(2S)\to 2(\pi^+\pi^-)$ in the
$\psi(3686)\to\gamma\eta_c(2S)$ radiative decay using $(27.12\pm 0.14)\times
10^8$ $\psi(3686)$ events collected by the BESIII ...detector at the BEPCII
collider. No significant signal is found, and the upper limit of
$\mathcal{B}\psi(3686)\to\gamma\eta_c(2S)\mathcal{B}\eta_c(2S)\to
2(\pi^+\pi^-)$ is determined to be $0.78\times 10^{-6}$ at the 90\% confidence
level. Using $\psi(3686)\to\gamma\chi_{cJ}$ transitions, we also measure the
branching fractions of $\mathcal{B}\chi_{cJ(J=0,1,2)}\to 2(\pi^+\pi^-)$,
which are $\mathcal{B}\chi_{c0}\to 2(\pi^+\pi^-)=(2.127\pm
0.002~(\mathrm{stat.})\pm 0.101~(\mathrm{syst.}))$\%, $\mathcal{B}\chi_{c1}\to
2(\pi^+\pi^-)=(0.685\pm 0.001~(\mathrm{stat.})\pm 0.031~\mathrm{syst.}))$\%,
and $\mathcal{B}\chi_{c2}\to 2(\pi^+\pi^-)=(1.153\pm
0.001~(\mathrm{stat.})\pm 0.063~(\mathrm{syst.}))$\%.
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