Search for the doubly heavy baryons Ω<i><sub>bc</sub></i><SUP>0</SUP> and Ξ<i><sub>bc</sub></i><SUP>0</SUP> decaying to Λ<i><sub>c</sub></i><SUP>+</SUP>π<SUP>-</SUP> and Ξ<i><sub>c</sub></i><SUP>+</SUP>π-



Aaij, R, Beteta, C Abellan, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Aidala, CA, Aiola, S, Ajaltouni, Z, Akar, S
et al (show 946 more authors) (2021) Search for the doubly heavy baryons Ω<i><sub>bc</sub></i><SUP>0</SUP> and Ξ<i><sub>bc</sub></i><SUP>0</SUP> decaying to Λ<i><sub>c</sub></i><SUP>+</SUP>π<SUP>-</SUP> and Ξ<i><sub>c</sub></i><SUP>+</SUP>π-. CHINESE PHYSICS C, 45 (9). 093002-.

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Abstract

The first search for the doubly heavy $\it{\Omega}_{bc}^{\rm0}$ baryon and a search for $\it{\Xi}_{bc}^{\rm0}$ baryon are performed using $pp$ collision data collected via the LHCb experiment from 2016 to 2018 at a centre-of-mass energy of $13TeV$, corresponding to an integrated luminosity of 5.2$fb^{-1}$. The baryons are reconstructed via their decays to $\it{\Lambda_{c}^{+}\pi^{-}}$ and $\it{\Xi_{c}^{+}\pi^{-}}$. No significant excess is found for invariant masses between 6700 and 7300$MeV/c^2$, in a rapidity range from 2.0 to 4.5 and a transverse momentum range from 2 to 20$GeV/c$. Upper limits are set on the ratio of the $\it{\Omega}_{bc}^{\rm0}$ and $\it{\Xi}_{bc}^{\rm0}$ production cross-section times the branching fraction to $\it{\Lambda_{c}^{+}\pi^{-}}$ ($\it{\Xi_{c}^{+}\pi^{-}}$) relative to that of the $\it{\Lambda_b^{\rm0}}$ ($\it{\Xi_b^{\rm0}}$) baryon, for different lifetime hypotheses, at $95\%$ confidence level. The upper limits range from $0.5\times10^{-4}$ to $2.5\times10^{-4}$ for the $\it{\Omega}_{bc}^{\rm0}\rightarrow\it{\Lambda_{c}^{+}\pi^{-}}$ ($\it{\Xi}_{bc}^{\rm0}\rightarrow\it{\Lambda_{c}^{+}\pi^{-}}$) decay, and from $1.4\times10^{-3}$ to $6.9\times10^{-3}$ for the $\it{\Omega}_{bc}^{\rm0}\rightarrow\it{\Xi_{c}^{+}\pi^{-}}$ ($\it{\Xi}_{bc}^{\rm0}\rightarrow\it{\Xi_{c}^{+}\pi^{-}}$) decay, depending on the considered mass and lifetime of the $\it{\Omega}_{bc}^{\rm0}$ ($\it{\Xi}_{bc}^{\rm0}$) baryon.

Item Type: Article
Additional Information: All figures and tables, along with machine-readable versions and any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2021-002.html (LHCb public pages)
Uncontrolled Keywords: B physics, quarkonium, spectroscopy, heavy quark production
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 02 Sep 2021 09:21
Last Modified: 10 Oct 2023 09:16
DOI: 10.1088/1674-1137/ac0c70
Open Access URL: https://iopscience.iop.org/article/10.1088/1674-11...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3134959