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 - INSPIRE

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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

CMS

Collaboration

Jan 17, 2020

33 pages

Published in:

Phys.Lett.B 803 (2020) 135345

Published: Apr 10, 2020

e-Print:

2001.06533 [hep-ex]

DOI:

10.1016/j.physletb.2020.135345 (publication)

PDG:

{{\mathit \Lambda}_{{{b}}}{(5912)}^{0}}

\rightarrow

{{\mathit \Lambda}_{{{b}}}^{0}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}

Report number:

CMS-BPH-19-003,
CERN-EP-2019-288

Experiments:

CERN-LHC-CMS

View in:

reference search59 citations

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Abstract: (Elsevier)

A study of excited Λb0 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 Λb0 states: Λb0(5912)0 , Λb0(5920)0 , Λb0(6146)0 , and Λb0(6152)0 in the Λb0π+π− mass spectrum is confirmed, and their masses are measured. The Λb0π+π− mass distribution exhibits a broad excess of events in the region of 6040–6100 MeV, whose origin cannot be discerned with the present data.

Note:

Replaced with the published version. Added the journal reference. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/BPH-19-003 (CMS Public Pages)

CMS
Physics
Beauty baryon
Heavy baryon
Heavy flavor
Flavor spectroscopy
Experimental results
p p: scattering
p p: colliding beams
Lambda/b0: excited state

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