First determination of the spin-parity of Ξc(3055)+,0 Baryons
The Ξ0(−)𝑏→Ξ𝑐(3055)+(0)(→𝐷+(0)Λ)𝜋− decay chains are observed, and the spin-parity of Ξ𝑐(3055)+(0) baryons is determined for the first time. The measurement is performed using proton-proton collision data at a center-of-mass energy of √𝑠 =13 TeV, corresponding to an integrated luminosity of 5.4...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
28 February 2025
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| In: |
Physical review letters
Year: 2025, Jahrgang: 134, Heft: 8, Pages: 1-13 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.134.081901 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevLett.134.081901 Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.134.081901 |
| Verfasserangaben: | R. Aaij et al., (LHCb Collaboration) |
MARC
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| 245 | 1 | 0 | |a First determination of the spin-parity of Ξc(3055)+,0 Baryons |c R. Aaij et al., (LHCb Collaboration) |
| 246 | 3 | 3 | |a First determination of the spin-parity of xi c(3055) plus ,0 Baryons |
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| 500 | |a The LHCb collaboration: R. Aaij, S. Bachmann, L. Carus, R. Caspary, S. Celani, C.E. Cocha Toapaxi, M. De Cian, L. Dittmann, S. Esen, F. Glaser, P.A. Günther, X. Han, S. Hausmann-Menzemer, P. Herrero Gascon, J. Hu, J. Kubat, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, P.R. Pais, S.R. Roy, M. Ruiz Diaz, M. Schmelling, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, M. Zavertyaev, Y. Zhao, A. Zhelezov und weitere 1104 | ||
| 500 | |a Im Titel ist der Buchstabe "c" tiefgestellt und die Zeichen "+,0" hochgestellt | ||
| 500 | |a Gesehen am 20.10.2025 | ||
| 520 | |a The Ξ0(−)→Ξ(3055)+(0)(→+(0)Λ)− decay chains are observed, and the spin-parity of Ξ(3055)+(0) baryons is determined for the first time. The measurement is performed using proton-proton collision data at a center-of-mass energy of √ =13 TeV, corresponding to an integrated luminosity of 5.4 fb−1, recorded by the LHCb experiment between 2016 and 2018. The spin-parity of the Ξ(3055)+(0) baryons is determined to be 3/2+ with a significance of more than 6.5 (3.5) compared to all other tested hypotheses. The up-down asymmetries of the Ξ0(−)→Ξ(3055)+(0)− transitions are measured to be −0.92±0.10±0.05 (−0.92±0.16±0.22), consistent with maximal parity violation, where the first uncertainty is statistical and the second is systematic. These results support the hypothesis that the Ξ(3055)+(0) baryons correspond to the first -wave -mode excitation of the Ξ flavor triplet. | ||
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