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Observation of the doubly charmed baryon $\Xi_{cc}^{++}$
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arxiv 1707.01621 v2 pith:356VQMDC submitted 2017-07-06 hep-ex
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abstract
A highly significant structure is observed in the $\Lambda_c^+K^-\pi^+\pi^+$ mass spectrum, where the $\Lambda_c^+$ baryon is reconstructed in the decay mode $pK^-\pi^+$. The structure is consistent with originating from a weakly decaying particle, identified as the doubly charmed baryon $\Xi_{cc}^{++}$. The difference between the masses of the $\Xi_{cc}^{++}$ and $\Lambda_c^+$ states is measured to be $1334.94 \pm 0.72 (\mathrm{stat}) \pm 0.27 (\mathrm{syst}~\mathrm{MeV}/c^2$, and the $\Xi_{cc}^{++}$ mass is then determined to be $3621.40 \pm 0.72 (\mathrm{stat}) \pm 0.27 (\mathrm{syst} \pm 0.14 \, (\Lambda_c^+)~\mathrm{MeV}/c^2$, where the last uncertainty is due to the limited knowledge of the $\Lambda_c^+$ mass. The state is observed in a sample of proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 1.7 $\mathrm{fb}^{-1}$, and confirmed in an additional sample of data collected at 8 TeV.
Forward citations
Cited by 16 Pith papers
Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record
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$\Xi_{cc}^{++}-\Xi_{cc}^{+}$ Transitions as a Two-Charm-Selective Portal to Ultra-Low-$Q$ Charged Currents
hep-ph 2026-06 unverdicted novelty 6.0 of 10
The Ξcc++ to Ξcc+ transition is proposed as a two-charm-selective portal for charged-current new physics that vanishes at leading order in lighter hadrons.
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From topological amplitudes to rescattering dynamics in charmed baryon decays
hep-ph 2025-07 conditional novelty 6.0 of 10
The authors build a bridge between topological and rescattering amplitudes for charmed baryon decays and claim the Koerner-Pati-Woo theorem fails, suggesting a measurement of Lambda_c^+ -> Sigma^+ K_S^0.
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Bridging correlation and spectroscopy measurements to access the hadron interaction behind molecular states: the case of the $\Xi$(1620) and $\Xi$(1690) in the $K^- \Lambda$ system
hep-ph 2024-11 conditional novelty 6.0 of 10
A model constrained by ALICE correlation data reproduces the LHCb K−Λ mass spectrum above 1680 MeV but overshoots the threshold region dominated by the Xi(1620).
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Doubly charmed baryon-light meson scattering in chiral effective theory with lattice constraints
hep-ph 2026-06 unverdicted novelty 5.0 of 10
Chiral EFT with lattice-fitted LECs and unitarization predicts resonance, virtual, and bound states plus scattering parameters for doubly charmed baryon-meson systems at physical quark masses.
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Toward Precision Fragmentation of $\Omega_{3Q}$ Baryons: The OMG3Q1.1 Framework
hep-ph 2026-06 unverdicted novelty 5.0 of 10
The OMG3Q1.1 framework delivers the first uncertainty-quantified set of fragmentation functions for all-heavy Ω_{3Q} baryons via diquark-inspired inputs, HF-NRevo evolution, and replica-based error estimation.
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Final-state rescattering mechanism of doubly-charmed baryon decays: $\mathcal{B}_{cc}\to\mathcal{B}_{c}V$
hep-ph 2026-06 unverdicted novelty 5.0 of 10
Calculates branching ratios, decay asymmetries, and CP violations for doubly charmed baryon decays to singly charmed baryons and vector mesons by evaluating full real and imaginary parts from final-state rescattering ...
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Quark-diquark effective mass formalism for heavy baryon spectroscopy
hep-ph 2026-03 unverdicted novelty 5.0 of 10
A quark-diquark formalism extracts effective masses and couplings from known heavy baryon data to predict spectra across singly, doubly, and triply heavy sectors with two scenarios and a mass-dependent binding term.
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Light cone QCD sum rules study of the rare radiative $\Xi^{*}_{bb}\to\Xi_b\gamma$ decay
hep-ph 2026-01 unverdicted novelty 5.0 of 10
Light cone QCD sum rules produce the form factors T1V(q²=0), T2V(q²=0), T1A(q²=0), T2A(q²=0) for Ξ*bb → Ξb γ, from which the decay width is calculated.
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Doubly-charmed pentaquark states in a mass splitting model
hep-ph 2025-04 conditional novelty 5.0 of 10
Using a color-magnetic interaction model anchored to P_c(4312), the authors predict three stable doubly-charmed pentaquarks below their strong decay thresholds.
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CP violation observables in baryon decays
hep-ph 2024-11 accept novelty 5.0 of 10
Time-reversal-odd CP observables in baryon decays are proportional to the cosine of strong-phase differences, so they complement sine-suppressed direct CP asymmetries.
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Revisiting lifetimes of doubly charmed baryons
hep-ph 2023-05 unverdicted novelty 5.0 of 10
Updated predictions within the heavy quark expansion confirm the lifetime hierarchy τ(Ξ_cc^+) < τ(Ω_cc^+) < τ(Ξ_cc^++) with τ(Ξ_cc^++) = 0.32 ± 0.05 +0.08/-0.07 ps matching LHCb data and provide ratios for the other states.
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Examining possible doubly topped baryon configurations
hep-ph 2026-01 reject novelty 4.0 of 10
QCD sum rules give doubly topped baryon masses of 345-350 GeV, essentially the sums of the constituent quark masses, with no sign of genuine binding.
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Hydrogen-like structures in the strong interaction
hep-ph 2025-05 reject novelty 4.0 of 10
T_cc+ is assigned to a compact color-sextet tetraquark by a Born-Oppenheimer quark model, which also predicts stable doubly heavy tetraquarks.
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Investigation of full heavy $ QQQQ'\bar{Q}$ pentaquark candidates
hep-ph 2025-02 conditional novelty 4.0 of 10
QCD sum rules predict a pentaquark with three charm quarks, one bottom quark, and an anti-charm quark near 11.38 GeV, and a pentaquark with three bottom quarks, one charm quark, and an anti-bottom quark near 21.0 GeV,...
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Charm physics
hep-ph 2025-06 unverdicted novelty 1.0 of 10
A review chapter summarizing the theoretical framework and experimental status of charm hadron lifetimes, D0 mixing, CP violation, and rare decays.
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Hadron Spectroscopy: Experimental Overview
nucl-ex 2026-07 unverdicted
Hadron spectroscopy's experimental status is reviewed from PDG listings: the conventional and exotic meson and baryon spectrum through 2025-2026, with no new results reported.
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