Measurement of Λb0, Λc+, and Λ Decay Parameters Using Λb0 → Λc+h− Decays

LHCb Collaboration

doi:10.1103/PhysRevLett.133.261804

Measurement of Λ_b⁰, Λ_c⁺, and Λ Decay Parameters Using Λ_b⁰ → Λ_c⁺h⁻ Decays

LHCb Collaboration

Research output: Contribution to journal › Article › peer-review

Abstract

A comprehensive study of the angular distributions in the bottom-baryon decays (Formula presented), followed by (Formula presented) with (Formula presented) or (Formula presented) decays, is performed using a data sample of proton-proton collisions corresponding to an integrated luminosity of (Formula presented) collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV. The decay parameters and the associated charge-parity ((Formula presented)) asymmetries are measured, with no significant (Formula presented) violation observed. For the first time, the (Formula presented) decay parameters are measured. The most precise measurements of the decay parameters (Formula presented), (Formula presented), and (Formula presented) are obtained for (Formula presented) decays and an independent measurement of the decay parameters for the strange-baryon (Formula presented) decay is provided. The results deepen our understanding of weak decay dynamics in baryon decays.

Original language	English
Article number	261804
Journal	Physical Review Letters
Volume	133
Issue number	26
DOIs	https://doi.org/10.1103/PhysRevLett.133.261804
State	Published - 31 Dec 2024
Externally published	Yes

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10.1103/PhysRevLett.133.261804

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@article{21275480b9bf44b482df94c5951cd142,

title = "Measurement of Λb0, Λc+, and Λ Decay Parameters Using Λb0 → Λc+h− Decays",

abstract = "A comprehensive study of the angular distributions in the bottom-baryon decays (Formula presented), followed by (Formula presented) with (Formula presented) or (Formula presented) decays, is performed using a data sample of proton-proton collisions corresponding to an integrated luminosity of (Formula presented) collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV. The decay parameters and the associated charge-parity ((Formula presented)) asymmetries are measured, with no significant (Formula presented) violation observed. For the first time, the (Formula presented) decay parameters are measured. The most precise measurements of the decay parameters (Formula presented), (Formula presented), and (Formula presented) are obtained for (Formula presented) decays and an independent measurement of the decay parameters for the strange-baryon (Formula presented) decay is provided. The results deepen our understanding of weak decay dynamics in baryon decays.",

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 Y. Tan and Tou, {D. Y.} and Milanes, {D. A.}",

note = "Publisher Copyright: {\textcopyright} 2024 CERN, for the LHCb Collaboration.",

year = "2024",

month = dec,

day = "31",

doi = "10.1103/PhysRevLett.133.261804",

language = "English",

volume = "133",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "26",

}

TY - JOUR

T1 - Measurement of Λb0, Λc+, and Λ Decay Parameters Using Λb0 → Λc+h− Decays

AU - LHCb Collaboration

AU - Dekkers, S.

AU - Egede, U.

AU - Fujii, Y.

AU - Hadavizadeh, T.

AU - Henderson, R. D.L.

AU - Lane, J. J.

AU - Liu, F. L.

AU - Monk, M.

AU - Song, R.

AU - Walton, E. J.

AU - Ward, J. A.

AU - Bediaga, I. B.

AU - Camargo Magalhaes, P.

AU - Cruz Torres, M.

AU - De Freitas Carneiro Da Graca, U.

AU - De Miranda, J. M.

AU - dos Reis, A. C.

AU - Falcao, L. N.

AU - Gomes, A.

AU - Massafferri, A.

AU - Santoro, L.

AU - Sundfeld, D.

AU - Torres Machado, D.

AU - Amato, S.

AU - De Paula, L.

AU - Ferreira Rodrigues, F.

AU - Gandelman, M.

AU - Hicheur, A.

AU - Lopes, J. H.

AU - Nasteva, I.

AU - Nogarolli, P.

AU - Otalora Goicochea, J. M.

AU - Polycarpo, E.

AU - Rangel, M. S.

AU - Souza De Paula, B.

AU - Dong, C.

AU - Gong, G.

AU - Hu, X.

AU - Kang, Y.

AU - Li, A.

AU - Lian, Z.

AU - Ma, G. M.

AU - Meng, F. M.

AU - Mu, H.

AU - Qin, N.

AU - Qu, S.

AU - Song, Y.

AU - Tan, Y.

AU - Tou, D. Y.

AU - Milanes, D. A.

PY - 2024/12/31

Y1 - 2024/12/31

N2 - A comprehensive study of the angular distributions in the bottom-baryon decays (Formula presented), followed by (Formula presented) with (Formula presented) or (Formula presented) decays, is performed using a data sample of proton-proton collisions corresponding to an integrated luminosity of (Formula presented) collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV. The decay parameters and the associated charge-parity ((Formula presented)) asymmetries are measured, with no significant (Formula presented) violation observed. For the first time, the (Formula presented) decay parameters are measured. The most precise measurements of the decay parameters (Formula presented), (Formula presented), and (Formula presented) are obtained for (Formula presented) decays and an independent measurement of the decay parameters for the strange-baryon (Formula presented) decay is provided. The results deepen our understanding of weak decay dynamics in baryon decays.

AB - A comprehensive study of the angular distributions in the bottom-baryon decays (Formula presented), followed by (Formula presented) with (Formula presented) or (Formula presented) decays, is performed using a data sample of proton-proton collisions corresponding to an integrated luminosity of (Formula presented) collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV. The decay parameters and the associated charge-parity ((Formula presented)) asymmetries are measured, with no significant (Formula presented) violation observed. For the first time, the (Formula presented) decay parameters are measured. The most precise measurements of the decay parameters (Formula presented), (Formula presented), and (Formula presented) are obtained for (Formula presented) decays and an independent measurement of the decay parameters for the strange-baryon (Formula presented) decay is provided. The results deepen our understanding of weak decay dynamics in baryon decays.

UR - http://www.scopus.com/inward/record.url?scp=85214134805&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.133.261804

DO - 10.1103/PhysRevLett.133.261804

M3 - Article

AN - SCOPUS:85214134805

SN - 0031-9007

VL - 133

JO - Physical Review Letters

JF - Physical Review Letters

IS - 26

M1 - 261804

ER -

Measurement of Λ_b⁰, Λ_c⁺, and Λ Decay Parameters Using Λ_b⁰ → Λ_c⁺h⁻ Decays

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