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@ARTICLE{Sirunyan:455307,
      author       = {Sirunyan, Albert M and others},
      collaboration = {{CMS Collaboration}},
      title        = {{O}bservation of a new excited beauty strange baryon
                      decaying to $\Xi^-_\mathrm{b} \pi^+ \pi^-$},
      reportid     = {PUBDB-2021-01023, arXiv:2102.04524. CMS-BPH-20-004.
                      CERN-EP-2021-020},
      year         = {2021},
      abstract     = {The $\Xi^-_\mathrm{b} \pi^+ \pi^-$ invariant mass spectrum
                      is investigated with an event sample of proton-proton
                      collisions at $\sqrt{s} = $ 13 TeV, collected by the CMS
                      experiment at the LHC in 2016-2018 and corresponding to an
                      integrated luminosity of 140 fb$^{-1}$. The ground state
                      $\Xi^-_\mathrm{b}$ is reconstructed via its decays to
                      J$/\psi \Xi^-$ and J$/\psi \Xi^-\Lambda$K$^-$. A narrow
                      resonance, labeled $\Xi_\mathrm{b}$(6100)$^-$, is observed
                      at a $\Xi^-_\mathrm{b} \pi^+ \pi^-$ invariant mass of 6100.3
                      $\pm$ 0.2 (stat) $\pm$ 0.1 (syst) $\pm$ 0.6
                      ($\Xi^-_\mathrm{b}$) MeV, where the last uncertainty
                      reflects the precision of the $\Xi^-_\mathrm{b}$ baryon
                      mass. The upper limit on the $\Xi_\mathrm{b}$(6100)$^-$
                      natural width is determined to be 1.9 MeV at 95\% confidence
                      level. Following analogies with the established excited
                      $\Xi_\mathrm{c}$ baryon states, the new
                      $\Xi_\mathrm{b}$(6100)$^-$ resonance and its decay sequence
                      are consistent with the orbitally excited $\Xi^-_\mathrm{b}$
                      baryon, with spin and parity quantum numbers $J^P=$
                      3/2$^-$.},
      keywords     = {* Automatic Keywords * (INSPIRE) / baryon: mass (INSPIRE) /
                      p p: scattering (INSPIRE) / narrow resonance (INSPIRE) /
                      quantum number (INSPIRE) / CERN LHC Coll (INSPIRE) / mass
                      spectrum (INSPIRE) / ground state (INSPIRE) / hyperon
                      (INSPIRE) / parity (INSPIRE) / spin (INSPIRE) / CMS
                      (INSPIRE) / TeV (INSPIRE)},
      cin          = {CMS},
      cid          = {I:(DE-H253)CMS-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611) /
                      HIDSS-0002 - DASHH: Data Science in Hamburg - Helmholtz
                      Graduate School for the Structure of Matter
                      $(2019_IVF-HIDSS-0002)$},
      pid          = {G:(DE-HGF)POF4-611 / $G:(DE-HGF)2019_IVF-HIDSS-0002$},
      experiment   = {EXP:(DE-H253)LHC-Exp-CMS-20150101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2102.04524},
      howpublished = {arXiv:2102.04524},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2102.04524;\%\%$},
      doi          = {10.3204/PUBDB-2021-01023},
      url          = {https://bib-pubdb1.desy.de/record/455307},
}