@article{3ffadb3386f74b69927cada5ce543d5e,
title = "First Determination of the Spin-Parity of (Formula presented) Baryons",
abstract = "The (Formula presented) decay chains are observed, and the spin-parity of (Formula presented) baryons is determined for the first time. The measurement is performed using proton-proton collision data at a center-of-mass energy of (Formula presented), corresponding to an integrated luminosity of (Formula presented), recorded by the LHCb experiment between 2016 and 2018. The spin-parity of the (Formula presented) baryons is determined to be (Formula presented) with a significance of more than (Formula presented) ((Formula presented)) compared to all other tested hypotheses. The up-down asymmetries of the (Formula presented) transitions are measured to be (Formula presented) ((Formula presented)), consistent with maximal parity violation, where the first uncertainty is statistical and the second is systematic. These results support the hypothesis that the (Formula presented) baryons correspond to the first (Formula presented)-wave (Formula presented)-mode excitation of the (Formula presented) flavor triplet.",
author = "{LHCb Collaboration} and S. Dekkers and U. Egede and Y. Fujii and T. Hadavizadeh and Henderson, {R. D.L.} and Lane, {J. J.} and Liu, {F. L.} and M. Monk and R. Song and Walton, {E. J.} and Ward, {J. A.} and Bediaga, {I. B.} and {Camargo Magalhaes}, P. and {Cruz Torres}, M. and {De Freitas Carneiro Da Graca}, U. and {De Miranda}, {J. M.} and {dos Reis}, {A. C.} and Falcao, {L. N.} and A. Gomes and A. Massafferri and L. Santoro and D. Sundfeld and {Torres Machado}, D. and S. Amato and {De Paula}, L. and {Ferreira Rodrigues}, F. and M. Gandelman and A. Hicheur and Lopes, {J. H.} and I. Nasteva and P. Nogarolli and {Otalora Goicochea}, {J. M.} and E. Polycarpo and Rangel, {M. S.} and {Souza De Paula}, B. and C. Dong and G. Gong and X. Hu and Y. Kang and A. Li and Z. Lian and Ma, {G. M.} and Meng, {F. M.} and H. Mu and N. Qin and S. Qu and Y. Song and E. Golobardes and X. Vilasis-Cardona and {Valls Canudas}, N.",
note = "Publisher Copyright: {\textcopyright} 2025 CERN, for the LHCb Collaboration.",
year = "2025",
month = feb,
day = "28",
doi = "10.1103/PhysRevLett.134.081901",
language = "English",
volume = "134",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "8",
}