B. G. Fulsom

Measurements of the branching fraction, isospin asymmetry, and lepton-universality ratio in $B \to J/ψK$ decays at Belle II

Belle II Collaboration, F. Abudinén, I. Adachi, R. Adak et autres

We report a study of $B \to J/ψ(\ell^{+}\ell^{-})K$ decays, where $\ell$ represents an electron or a muon, using $e^{+}e^{-}$ collisions at the $Υ(4S)$ resonance. The data were collected by the Belle II experiment at the SuperKEKB asymmetric-energy collider during 2019-2021, corresponding to …

Measurement of branching fractions of Λc+→ηΛπ+ , ηΣ0π+ , Λ(1670)π+ , and ηΣ(1385)+

J. Y. Lee, K. Tanida, Yuji Katō, S. K. Kim et autres

We report branching fraction measurements of four decay modes of the ${\mathrm{\ensuremath{\Lambda}}}_{c}^{+}$ baryon, each of which includes an $\ensuremath{\eta}$ meson and a $\mathrm{\ensuremath{\Lambda}}$ baryon in the final state, and all of which are measured relative to the ${\mathrm{\ensuremath{\Lambda}}}_{c}^{+}\ensuremath{\rightarrow}p{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ decay mode. The results …

kr, jp, sa, us, ru, de, in, cz, si, pl, it, tw, cn, au (code pays fourni par la source)

Measurement of the τ Lepton Polarization and R ( D * ) in the Decay B ¯ → D * τ − ν ¯ τ

S. Hirose, T. Iijima, I. Adachi, K. Adamczyk et autres

We report the first measurement of the $\ensuremath{\tau}$ lepton polarization ${P}_{\ensuremath{\tau}}({D}^{*})$ in the decay $\overline{B}\ensuremath{\rightarrow}{D}^{*}{\ensuremath{\tau}}^{\ensuremath{-}}{\overline{\ensuremath{\nu}}}_{\ensuremath{\tau}}$ as well as a new measurement of the ratio of the branching fractions $R({D}^{*})=\mathcal{B}(\overline{B}\ensuremath{\rightarrow}{D}^{*}{\ensuremath{\tau}}^{\ensuremath{-}}{\overline{\ensuremath{\nu}}}_{\ensuremath{\tau}})/\mathcal{B}(\overline{B}\ensuremath{\rightarrow}{D}^{*}{\ensuremath{\ell}}^{\ensuremath{-}}{\overline{\ensuremath{\nu}}}_{\ensuremath{\ell}})$, where ${\ensuremath{\ell}}^{\ensuremath{-}}$ denotes an electron or a muon, and the $\ensuremath{\tau}$ is reconstructed …

jp, pl, sa, us, tr, ru, in, au, at, si, cz, tw, kr, de, cn (code pays fourni par la source)

Search for type-III seesaw heavy leptons in pp collisions at s=8 TeV with the ATLAS detector

G. Aad, B. Abbott, J. Abdallah, O. Abdinov et autres

A search for the pair production of heavy leptons (${N}^{0},{L}^{\ifmmode\pm\else\textpm\fi{}}$) predicted by the type-III seesaw theory formulated to explain the origin of small neutrino masses is presented. The decay channels ${N}^{0}\ensuremath{\rightarrow}{W}^{\ifmmode\pm\else\textpm\fi{}}{l}^{\ensuremath{\mp}}$ ($\ensuremath{\ell}=e,\ensuremath{\mu},\ensuremath{\tau}$) and ${L}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{W}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\nu}$ ($\ensuremath{\nu}={\ensuremath{\nu}}_{e},{\ensuremath{\nu}}_{\ensuremath{\mu}},{\ensuremath{\nu}}_{\ensuremath{\tau}}$) are considered. The analysis is performed using …

fr, us, tw, az, nl, ca, il, ch, se, it, pl, de, gb, rs, es, pt, ru, jp, ar, gr, dk, br, sk, tr (code pays fourni par la source)