Study of excited $\Lambda_\mathrm{b}^0$ states decaying to $\Lambda_\mathrm{b}^0\pi^+\pi^-$ in proton-proton collisions at $\sqrt{s} =$ 13 TeV

  • Freya Blekman (Creator)
  • Emil Sørensen Bols (Creator)
  • Simranjit Singh Chhibra (Creator)
  • Jorgen D'Hondt (Creator)
  • Jarne Theo De Clercq (Creator)
  • Denys Lontkovskyi (Creator)
  • Steven Lowette (Creator)
  • Ivan Marchesini (Creator)
  • Seth Moortgat (Creator)
  • Quentin Python (Creator)
  • Stefaan Tavernier (Creator)
  • Walter Van Doninck (Creator)
  • Petra Van Mulders (Creator)
  • Douglas Burns (Creator)

Dataset

Abstract

A study of excited Λ0
b baryons is reported, based on a data sample collected in 2016–2018 with the
CMS detector at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding
to an integrated luminosity of up to 140 fb−1. The existence of four excited Λ0
b states: Λ0
b(5912)0,
Λ0
b(5920)0, Λ0
b(6146)0, and Λ0
b(6152)0 in the Λ0
bπ+π− mass spectrum is confirmed, and their masses
are measured. The Λ0
bπ+π− mass distribution exhibits a broad excess of events in the region of
6040–6100MeV, whose origin cannot be discerned with the present data.
Datum van beschikbaarheid31 jan 2020
UitgeverHEPData

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