J. High Energ. Phys. 2021, 226 (2021) Using $1310.6\times10^{6}$ $J/\psi$ and $448.1\times10^{6}$ $\psi(3686)$
events collected with the BESIII detector, the branching fractions of $J/\psi$
and ...$\psi(3686)$ decays to $\Sigma^{+}\overline{\Sigma}^{-}$ are measured to be
$(10.61 \pm 0.04 \pm 0.36) \times 10^{-4}$ and $(2.52 \pm 0.04 \pm 0.09) \times
10^{-4}$, respectively. In addition, the ratio of $\mathcal{B}(\psi(3686)
\rightarrow \Sigma^{+}\overline{\Sigma}^{-})/\mathcal{B}(J/\psi \rightarrow
\Sigma^{+}\overline{\Sigma}^{-})$ is determined to be $(23.8 \pm 1.1)\%$ which
violates the "$12\%$ rule".
We reexamine charge quantization in the standard model with and without a right-handed neutrino. We remark that, without the right-handed neutrino, only the standard charges are allowed for Weyl ...quarks and leptons under the standard group. With it, there are two independent quantized hypercharge and electric-charge assignments and nonquantized charge assignments would result from linear combinations of these two. One more condition is sufficient to recover the unique correct charge quantization.
Phys. Rev. D 104, L071101 (2021) The decay $D^{+}_{s}\rightarrow \pi^{+}\pi^{+}\pi^{-}\eta$ is observed for
the first time, using $e^+e^-$ collision data corresponding to an integrated
luminosity of ...6.32 fb$^{-1}$, collected by the BESIII detector at
center-of-mass energies between 4.178 and 4.226 GeV. The absolute branching
fraction for this decay is measured to be $\mathcal{B}(D^+_s \to \pi^+ \pi^+
\pi^- \eta) = (3.12\pm0.13_{\rm stat.}\pm0.09_{\rm syst.})$%. The first
amplitude analysis of this decay reveals the sub-structures in
$D^{+}_{s}\rightarrow \pi^{+}\pi^{+}\pi^{-}\eta$ and determines the relative
fractions and the phases among these sub-structures. The dominant intermediate
process is $D^{+}_{s}\rightarrow a_1(1260)^+ \eta, a_1(1260)^+ \rightarrow
\rho(770)^0\pi^+$ with a branching fraction of $(1.73 \pm 0.14_{\rm stat.} \pm
0.08_{\rm syst.})$%. We also observe the W-annihilation process
$D^{+}_{s}\rightarrow a_0(980)^+\rho(770)^0$, $a_0(980)^+ \to \pi^+ \eta$ with
a branching fraction of $(0.21\pm0.08_{\rm stat.}\pm0.05_{\rm syst.})$%, which
is larger than the branching fractions of other measured pure W-annihilation
decays by one order of magnitude.
By analyzing $4.48\times10^8$ $\psi(3686)$ events collected with the BESIII
detector, we observe the decays $\chi_{cJ} \to n K^0_S\bar\Lambda + c.c.$
($J=0$, 1, 2) for the first time, via the ...radiative transition $\psi(3686) \to
\gamma \chi_{cJ}$. The branching fractions are determined to be $(6.67 \pm
0.26_{\rm stat} \pm 0.41_{\rm syst})\times10^{-4}$, $(1.71 \pm 0.12_{\rm stat}
\pm 0.12_{\rm syst})\times10^{-4}$, and $(3.66 \pm 0.17_{\rm stat} \pm
0.23_{\rm syst})\times10^{-4}$ for $J=0$, 1, and 2, respectively.
Phys. Rev. D 104, L091103 (2021) By analyzing an $e^+e^-$ annihilation data sample corresponding to an
integrated luminosity of $2.93~\mathrm{fb}^{-1}$ collected at a center-of-mass
energy of 3.773 ...GeV with the BESIII detector, we measure the branching fraction
of the $D^0\to \rho^- \mu^+\nu_\mu$ decay for the first time. We obtain
${\mathcal B}_{D^0\to \rho^- \mu^+\nu_\mu}=(1.35\pm0.09_{\rm stat}\pm0.09_{\rm
syst})\times 10^{-3}$. Using the world average of ${\mathcal B}_{D^0\to \rho^-
e^+\nu_e}$, we find a branching fraction ratio of ${\mathcal B}_{D^0\to \rho^-
\mu^+\nu_\mu}/{\mathcal B}_{D^0\to \rho^- e^+\nu_e}=0.90\pm0.11$, which agrees
with the theoretical expectation of lepton flavor universality within the
uncertainty. Combining the world average of ${\mathcal B}_{D^+\to \rho^0 \mu^+
\nu_\mu}$ and the lifetimes of $D^{0(+)}$, we obtain a partial decay width
ratio of ${\Gamma}_{D^0\to \rho^- \mu^+ \nu_{\mu}}/(2{\Gamma}_{D^+\to \rho^0
\mu^+ \nu_{\mu}}) = 0.71\pm0.14$, which is consistent with the isospin symmetry
expectation of one within $2.1\sigma$. For the reported values of ${\mathcal
B}_{D^0\to \rho^- \mu^+\nu_\mu}/{\mathcal B}_{D^0\to \rho^- e^+\nu_e}$ and
${\Gamma}_{D^0\to \rho^- \mu^+ \nu_{\mu}}/2{\Gamma}_{D^+\to \rho^0 \mu^+
\nu_{\mu}}$, the uncertainty is the quadratic sum of the statistical and
systematic uncertainties.
Phys. Rev. D 104, 032012 (2021) The Born cross sections are measured for the first time for the processes
$e^+e^-\to D_s^{*+}D_{s0}^*(2317)^- +c.c.$ and $e^+e^-\to
D_s^{*+}D_{s1}(2460)^- +c.c.$ at ...the center-of-mass energy $\sqrt{s}=$
4.600~GeV, 4.612~GeV, 4.626~GeV, 4.640~GeV, 4.660~GeV, 4.68~GeV, and 4.700~GeV,
and for $e^+e^-\to D_s^{*+}D_{s1}(2536)^- +c.c.$ at $\sqrt{s}=$ 4.660~GeV,
4.680~GeV, and 4.700~GeV, using data samples collected with the BESIII detector
at the BEPCII collider. No structures are observed in cross-section
distributions for any of the processes.
The trp gene of Drosophila encodes a subunit of a class of Ca super(2+)-selective light-activated channels that carry the bulk of the phototransduction current. Transient receptor potential (TRP) ...homologs have been identified throughout animal phylogeny. In vertebrates, TRP-related channels have been suggested to mediate "store-operated Ca super(2+) entry," which is important in Ca super(2+) homeostasis in a wide variety of cell types. However, the mechanisms of activation and regulation of the TRP channel are not known. Here, we report on the Drosophila inaF gene, which encodes a highly eye-enriched protein, INAF, that appears to be required for TRP channel function. A null mutation in this gene significantly reduces the amount of the TRP protein and, in addition, specifically affects the TRP channel function so as to nearly shut down its activity. The inaF mutation also dramatically suppresses the severe degeneration caused by a constitutively active mutation in the trp gene. Although the reduction in the amount of the TRP protein may contribute to these phenotypes, several lines of evidence support the view that inaF mutations also more directly affect the TRP channel function, suggesting that the INAF protein may have a regulatory role in the channel function.
Phys. Rev. Lett. 127, 171801 (2021) Using a dataset of 6.32 fb$^{-1}$ of $e^+ e^-$ annihilation data collected
with the BESIII detector at center-of-mass energies between 4178 and 4226 MeV,
we have ...measured the absolute branching fraction of the leptonic decay $D_s^+
\to \tau^+ \nu_{\tau}$ via $\tau^+ \to e^+ \nu_e \bar{\nu}_{\tau}$, and find
$\mathcal{B}_{D_s^+ \to \tau^+ \nu_{\tau}}=(5.27\pm0.10\pm0.12)\times10^{-2}$,
where the first uncertainty is statistical and the second is systematic. The
precision is improved by a factor of 2 compared to the previous best
measurement. Combining with $f_{D_s^+}$ from Lattice quantum chromodynamics
calculations or the $|V_{cs}|$ from the CKMfitter group, we extract
$|V_{cs}|=0.978\pm0.009\pm0.012$ and $f_{D_s^+}= (251.1\pm2.4\pm3.0)$ MeV,
respectively. Combining our result with the world averages of
$\mathcal{B}_{D_s^+ \to \tau^+ \nu_{\tau}}$ and $\mathcal{B}_{D_s^+ \to \mu^+
\nu_{\mu}}$, we obtain the ratio of the branching fractions $\mathcal{B}_{D_s^+
\to \tau^+ \nu_{\tau}} / \mathcal{B}_{D_s^+ \to \mu^+ \nu_{\mu}} =
9.72\pm0.37$, which is consistent with the standard model prediction of lepton
flavor universality.
Phys. Rev. D89, 077501 (2014) We study the semileptonic decays of $B^-\to f_0(1710\,,1500\,,1370) e^-\bar
\nu_e$, in which the three $f_0$ states mix with glueball, $\bar s s$ and
$(\bar u u+\bar d ...d)/\sqrt 2$ states, respectively. By averaging the mixings
fitted in the literature, we find that the branching ratios of $B^-\to f_0
e^-\bar \nu_e$ are $O(10^{-6})$, $O(10^{-6})$ and $O(10^{-5})$, respectively,
which can be simultaneously observed in experiments at $B$ factories. The large
predicted branching rate for $B^-\to f_0(1370) e^-\bar \nu_e$ would provide a
clean mode to directly observe the $f_0(1370)$ state.
Phys. Lett. B 820 (2021) 136557 Using $e^+e^-$ collision data at ten center-of-mass energies between 2.644
and 3.080 GeV collected with the BESIII detector at BEPCII and corresponding to
an ...integrated luminosity of about 500 pb$^{-1}$, we measure the cross sections
and effective form factors for the process
$e^{+}e^{-}\rightarrow\Xi^{0}\bar{\Xi}^{0}$ utilizing a single-tag method. A
fit to the cross section of $e^{+}e^{-}\rightarrow\Xi^{0}\bar{\Xi}^{0}$ with a
pQCD-driven power function is performed, from which no significant resonance or
threshold enhancement is observed. In addition, the ratio of cross sections for
the processes $e^{+}e^{-}\rightarrow\Xi^{-}\bar{\Xi}^{+}$ and
$\Xi^{0}\bar{\Xi}^{0}$ is calculated using recent BESIII measurement and is
found to be compatible with expectation from isospin symmetry.
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