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Search for the doubly heavy baryon $bc^+$ decaying to $J/c^+$


LHCb Collaboration; Bernet, R; Müller, K; Owen, P; Serra, N; Steinkamp, O; et al (2023). Search for the doubly heavy baryon $bc^+$ decaying to $J/c^+$. Chinese Physics C, 47(9):093001.

Abstract

A first search for the $ \varXi_{bc}^+ \to J/\psi \varXi_c^+ $ decay is performed by the LHCb experiment with a data sample of proton-proton collisions, corresponding to an integrated luminosity of 9 fb−1 recorded at centre-of-mass energies of 7, 8, and 13 TeV. Two peaking structures are seen with a local (global) significance of $ 4.3\,(2.8) $ and $ 4.1\,(2.4) $ standard deviations at masses of 6571 and 6694 MeV/$c^2$, respectively. Upper limits are set on the $\varXi_{bc}^+$ baryon production cross-section times the branching fraction relative to that of the $B_{c}^{+} \rightarrow J / \psi D_{s}^{+}$ decay at centre-of-mass energies of 8 and 13 TeV, in the $ \varXi_{bc}^+ $ and in the $ B_{c}^{+} $ rapidity and transverse-momentum ranges from 2.0 to 4.5 and 0 to $ 20\;{\rm{GeV}} /{c} $, respectively. Upper limits are presented as a function of the $ \varXi_{bc}^+ $ mass and lifetime.

Abstract

A first search for the $ \varXi_{bc}^+ \to J/\psi \varXi_c^+ $ decay is performed by the LHCb experiment with a data sample of proton-proton collisions, corresponding to an integrated luminosity of 9 fb−1 recorded at centre-of-mass energies of 7, 8, and 13 TeV. Two peaking structures are seen with a local (global) significance of $ 4.3\,(2.8) $ and $ 4.1\,(2.4) $ standard deviations at masses of 6571 and 6694 MeV/$c^2$, respectively. Upper limits are set on the $\varXi_{bc}^+$ baryon production cross-section times the branching fraction relative to that of the $B_{c}^{+} \rightarrow J / \psi D_{s}^{+}$ decay at centre-of-mass energies of 8 and 13 TeV, in the $ \varXi_{bc}^+ $ and in the $ B_{c}^{+} $ rapidity and transverse-momentum ranges from 2.0 to 4.5 and 0 to $ 20\;{\rm{GeV}} /{c} $, respectively. Upper limits are presented as a function of the $ \varXi_{bc}^+ $ mass and lifetime.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > Nuclear and High Energy Physics
Physical Sciences > Instrumentation
Physical Sciences > Astronomy and Astrophysics
Language:English
Date:2023
Deposited On:16 Jan 2024 14:37
Last Modified:30 Jun 2024 01:37
Publisher:IOP Publishing
ISSN:1674-1137
OA Status:Hybrid
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1088/1674-1137/ace9c8
  • Content: Published Version
  • Language: English
  • Licence: Creative Commons: Attribution 3.0 Unported (CC BY 3.0)