Observation of the Doubly Charmed Baryon Ξc c
By L. C. R. Aaij, B. Adeva, M. Adinolfi, Z. Ajaltouni, S. Akar, J. Albrecht, Federico Alessio, M. Alexander, A. A. Albero, S. Ali and 796 more. 2017
166 citations recorded by the source corpus.
A highly significant structure is observed in the Lambda K-+(c)-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 +/- 0.72(stat.) +/- 0.27(syst.) MeV/c(2), and the Xi(++)(cc) mass is then determined to be 3621.40 +/- 0.72(stat.) +/- 0.27(syst.) +/- 0.14(Lambda(+)(c)) 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 fb(-1), and confirmed in an additional sample of data collected at 8 TeV.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/4005a449ee33ed6ba73ac38a541ba5ec385465b6
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In Nuclear and High Energy Physics
- Xiang Liu
- Shi-Lin Zhu
- Hua-Xing Chen
- Wei Chen
- Vladimir Vava Gligorov
- Jure Zupan
- Ediotors A. Cerri
- S. Malvezzi
Citations in the corpus
- Pentaquark and Tetraquark States (2019, methodology): “Two investigations based on heavy quark symmetry analysis also show the possible existence of the doubly heavy tetraquark states [164, 165], which are partly motivated by LHCb observation of the double-charm baryon Ξcc(3621) [36] since the role of the cc diquark within Tcc is similar to that in Ξcc(”
- Opportunities in Flavour Physics at the HL-LHC and HE-LHC (2018, background): “If the masses of the doubly charmed tetraquarks are below their corresponding open-charm thresholds, they would manifest as weakly decaying hadrons with properties including masses, lifetimes and decay modes not too different from the recently observed ⌅ cc baryons [756], and, as for the ⌅cc baryons”