We have observed a narrow state near $2.32\mathrm{G}\mathrm{e}\mathrm{V}/c^2$ in the inclusive $D_s^{+}{\pi }^0$ invariant mass distribution from $e^{+}{e}^{-}$ annihilation data at energies near 10.6 GeV. The observed width is consistent with the experimental resolution. The small intrinsic width and the quantum numbers of the final state indicate that the decay violates isospin conservation. The state has natural spin-parity and the low mass suggests a $J^P=0^{+}$ assignment. The data sample corresponds to an integrated luminosity of $91{\mathrm{f}\mathrm{b}}^{-1}$ recorded by the BABAR detector at the SLAC PEP-II asymmetric-energy $e^{+}{e}^{-}$ storage ring.

We study the decay $B^{-}\to J/\psi K^{-}{\pi }^{+}{\pi }^{-}$ using $117\times {10}^6$ $B\overline{B}$ events collected at the $Y(4S)$ resonance with the BABAR detector at the PEP-II $e^{+}{e}^{-}$ asymmetric-energy storage ring. We measure the branching fractions $\mathcal{B}$ $(B^{-}\to J/\psi K^{-}{\pi }^{+}{\pi }^{-})=(116\pm 7(\mathrm{stat}.)\pm 9(\mathrm{syst}.))\times {10}^{-5}$ and $\mathcal{B}$ $(B^{-}\to X(3872){\mathrm{K}}^{-})\times$ $\mathcal{B}$ $(X(3872)\to \mathrm{J}/\psi {\pi }^{+}{\pi }^{-})=(1.28\pm 0.41)\times {10}^{-5}$ and find the mass of the $X(3872)$ to be $3873.4\pm 1.4\mathrm{MeV}/{\mathrm{c}}^2$. We search for the $h_c$ narrow state in the decay $B^{-}\to h_c{K}^{-}$, $h_c\to J/\psi {\pi }^{+}{\pi }^{-}$ and for the decay $B^{-}\to J/\psi D^0{\pi }^{-}$, with $D^0\to K^{-}{\pi }^{+}$. We set the $90\%$ C.L. limits $\mathcal{B}(B^{-}\to h_c{K}^{-})\times \mathcal{B}(h_c\to J/\psi {\pi }^{+}{\pi }^{-})<3.4\times {10}^{-6}$ and $\mathcal{B}(B^{-}\to J/\psi D^0{\pi }^{-})<5.2\times {10}^{-5}$.

Since the initial data taking of the CERN LHC, the CMS experiment has undergone substantial upgrades and improvements. This paper discusses the CMS detector as it is configured for the third data-taking period of the CERN LHC, Run 3, which started in 2022. The entire silicon pixel tracking detector was replaced. A new powering system for the superconducting solenoid was installed. The electronics of the hadron calorimeter was upgraded. All the muon electronic systems were upgraded, and new muon detector stations were added, including a gas electron multiplier detector. The precision proton spectrometer was upgraded. The dedicated luminosity detectors and the beam loss monitor were refurbished. Substantial improvements to the trigger, data acquisition, software, and computing systems were also implemented, including a new hybrid CPU/GPU farm for the high-level trigger.