J. Becker

Search for $B^0 \to K^{\ast 0} τ^+ τ^-$ decays at the Belle II experiment

H. Aihara, M. Alhakami, N. Anh Ky, N. K. Baghel et autres

We present a search for the rare flavor-changing neutral-current decay $B^0 \to K^{\ast 0} τ^+ τ^-$ with data collected by the Belle II experiment at the SuperKEKB electron-positron collider. The analysis uses a 365 fb$^{-1}$ data sample recorded at the center-of-mass energy …

ToASt: A 64-channel ASIC for the readout of the Silicon Strip Detectors of the PANDA experiment

G. Mazza, D. Calvo, F. Cossio, P. De Remigis et autres

it, gb, de, cz (code pays fourni par la source)

Measurements of the branching fractions for $B \to K^{*}γ$ decays at Belle II

F. Abudinén, I. Adachi, R. Adak, K. Adamczyk et autres

This paper reports a study of $B \to K^{*}γ$ decays using $62.8\pm 0.6$ fb$^{-1}$ of data collected during 2019--2020 by the Belle II experiment at the SuperKEKB $e^{+}e^{-}$ asymmetric-energy collider, corresponding to $(68.2 \pm 0.8) \times 10^6$ $B\overline{B}$ events. We find $454 …

fr (code pays fourni par la source)

Search for the lepton flavor violation process J/ψ→eμ at BESIII

M. Ablikim, M. N. Achasov, O. Albayrak, D. J. Ambrose et autres

We search for the lepton-flavor-violating decay of the $J/\ensuremath{\psi}$ into an electron and a muon using $(225.3\ifmmode\pm\else\textpm\fi{}2.8)\ifmmode\times\else\texttimes\fi{}{10}^{6}\text{ }J/\ensuremath{\psi}$ events collected with the BESIII detector at the BEPCII. Four candidate events are found in the signal region, consistent with background expectations. An upper …

cn, ru, us, de, it, nl, tr, pk (code pays fourni par la source)

Observation of ηc decay into Σ+Σ¯− and Ξ−Ξ¯+ final states

M. Ablikim, M. N. Achasov, O. Albayrak, D. J. Ambrose et autres

Using a data sample of $2.25\ifmmode\times\else\texttimes\fi{}{10}^{8}$ $J/\ensuremath{\psi}$ events collected with the BESIII detector, we present the first observation of the decays of ${\ensuremath{\eta}}_{c}$ mesons to ${\ensuremath{\Sigma}}^{+}{\overline{\ensuremath{\Sigma}}}^{\ensuremath{-}}$ and ${\ensuremath{\Xi}}^{\ensuremath{-}}{\overline{\ensuremath{\Xi}}}^{+}$. The branching fractions are measured to be $(2.11\ifmmode\pm\else\textpm\fi{}{0.28}_{\mathrm{stat}}\ifmmode\pm\else\textpm\fi{}{0.18}_{\mathrm{syst}}\ifmmode\pm\else\textpm\fi{}{0.50}_{\mathrm{PDG}})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$ and $(0.89\ifmmode\pm\else\textpm\fi{}{0.16}_{\mathrm{stat}}\ifmmode\pm\else\textpm\fi{}{0.08}_{\mathrm{syst}}\ifmmode\pm\else\textpm\fi{}{0.21}_{\mathrm{PDG}})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$ for ${\ensuremath{\eta}}_{c}\ensuremath{\rightarrow}{\ensuremath{\Sigma}}^{+}{\overline{\ensuremath{\Sigma}}}^{\ensuremath{-}}$ and ${\ensuremath{\Xi}}^{\ensuremath{-}}{\overline{\ensuremath{\Xi}}}^{+}$, …

cn, ru, jp, ua (code pays fourni par la source)

Discovery of VHE emission towards the Carina arm region with the H.E.S.S. telescope array: HESS J1018-589

A. Abramowski, F. Acero, F. Aharonian, A. G. Akhperjanian et autres

The Carina arm region, containing the supernova remnant SNR G284.3-1.8, the high-energy (HE; E > 100 MeV) binary 1FGL J1018.6-5856 and the energetic pulsar PSR J1016-5857 and its nebula, has been observed with the H.E.S.S. telescope array. The observational coverage of the …

de, fr, ie, am, pl, Afrique du Sud, gb, se, Namibie, at (code pays fourni par la source)

Physics Performance Report for PANDA: Strong Interaction Studies with Antiprotons

PANDA Collaboration, W. Erni, I. Keshelashvili, B. Krusche et autres

To study fundamental questions of hadron and nuclear physics in interactions of antiprotons with nucleons and nuclei, the universal PANDA detector will be built. Gluonic excitations, the physics of strange and charm quarks and nucleon structure studies will be performed with unprecedented …

ch, cn, ro, de, us, pl, it, Nigéria, ru, gb (code pays fourni par la source)