Observation of two resonances in the $Λ_b^0 π^\pm$ systems and precise measurement of $Σ_b^\pm$ and $Σ_b^{*\pm}$ properties

Abstract

The first observation of two structures consistent with resonances in the final states $Λ_b^0 π^-$ and $Λ_b^0 π^+$ is reported using samples of $pp$ collision data collected by the LHCb experiment at $\sqrt{s} = 7$ and $8$ TeV, corresponding to an integrated luminosity of 3 $\mathrm{fb}^{-1}$. The ground states $Σ_b^\pm$ and $Σ_b^{*\pm}$ are also confirmed and their masses and widths are precisely measured.

All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-032.html