@Article{LHCbCollaborationAaij_etal2022,
author="LHCb Collaboration (Aaij, R. et al
and Jashal, B. K.
and Martinez-Vidal, F.
and Oyanguren, A.
and Remon Alepuz, C.
and Ruiz Vidal, J.",
title="Observation of two new excited $\Xi$0b states decaying to $\Lambda$0bK-$\pi$+",
journal="Physical Review Letters",
year="2022",
publisher="Amer Physical Soc",
volume="128",
number="16",
pages="162001 - 12pp",
abstract="Two narrow resonant states are observed in the $\Lambda$0bK-$\pi$+ mass spectrum using a data sample of proton-proton collisions at a center-of-mass energy of 13 TeV, collected by the LHCb experiment and corresponding to an integrated luminosity of 6 fb-1. The minimal quark content of the $\Lambda$0bK-$\pi$+ system indicates that these are excited $\Xi$0b baryons. The masses of the $\Xi$b(6327)0 and $\Xi$b(6333)0 states are m($\Xi$b(6327)0)=6327.28+0.23-0.21{\textpm}0.12{\textpm}0.24 MeV and m($\Xi$b(6333)0)=6332.69+0.17-0.18{\textpm}0.03{\textpm}0.22 MeV, respectively, with a mass splitting of $\Delta$m=5.41+0.26-0.27{\textpm}0.12 MeV, where the uncertainties are statistical, systematic and due to the $\Lambda$0b mass measurement. The measured natural widths of these states are consistent with zero, with upper limits of $\Gamma$($\Xi$b(6327)0)<2.20 (2.56) MeV and $\Gamma$($\Xi$b(6333)0)<1.60 (1.92) MeV at a 90{\%} (95{\%}) credibility level. The significance of the two-peak hypothesis is larger than nine (five) Gaussian standard deviations compared to the no-peak (one-peak) hypothesis. The masses, widths and resonant structure of the new states are in good agreement with the expectations for a doublet of 1D $\Xi$0b resonances.",
optnote="WOS:000802651800002",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5241), last updated on Tue, 14 Jun 2022 07:25:08 +0000",
issn="0031-9007",
doi="10.1103/PhysRevLett.128.162001",
opturl="https://arxiv.org/abs/2110.04497",
opturl="https://doi.org/10.1103/PhysRevLett.128.162001",
language="English"
}