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Observation of the Λb0→χc1 (3872) pK− decay. / The LHCb Collaboration ; Кроковный, Павел Петрович; Воробьев, Виталий Сергеевич.

In: Journal of High Energy Physics, Vol. 2019, No. 9, 28, 01.09.2019.

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

Harvard

The LHCb Collaboration, Кроковный, ПП & Воробьев, ВС 2019, 'Observation of the Λb0→χc1 (3872) pK− decay', Journal of High Energy Physics, vol. 2019, no. 9, 28. https://doi.org/10.1007/JHEP09(2019)028

APA

The LHCb Collaboration, Кроковный, П. П., & Воробьев, В. С. (2019). Observation of the Λb0→χc1 (3872) pK− decay. Journal of High Energy Physics, 2019(9), [28]. https://doi.org/10.1007/JHEP09(2019)028

Vancouver

The LHCb Collaboration, Кроковный ПП, Воробьев ВС. Observation of the Λb0→χc1 (3872) pK− decay. Journal of High Energy Physics. 2019 Sept 1;2019(9):28. doi: 10.1007/JHEP09(2019)028

Author

The LHCb Collaboration ; Кроковный, Павел Петрович ; Воробьев, Виталий Сергеевич. / Observation of the Λb0→χc1 (3872) pK− decay. In: Journal of High Energy Physics. 2019 ; Vol. 2019, No. 9.

BibTeX

@article{6ef886fe69eb44e2ac62852b9ecf4dd8,
title = "Observation of the Λb0→χc1 (3872) pK− decay",
abstract = "Using proton-proton collision data, collected with the LHCb detector and corresponding to 1.0, 2.0 and 1.9 fb−1 of integrated luminosity at the centre-of-mass energies of 7, 8, and 13 TeV, respectively, the decay Λb0→χc1(3872)pK− with χc1(3872) → J/ψ π+π− is observed for the first time. The significance of the observed signal is in excess of seven standard deviations. It is found that (58 ± 15)% of the decays proceed via the two-body intermediate state χc1(3872)Λ(1520). The branching fraction with respect to that of the Λb0 → ψ(2S)pK− decay mode, where the ψ(2S) meson is reconstructed in the J/ψ π+π− final state, is measured to be:β(Λb0→χc1(3872)pK−)β(Λb0→ψ(2S)pK−)×β(χc1(3872)→J/ψπ+π−)β(ψ(2S)→J/ψπ+π−)=(5.4±1.1±0.2)×10−2, where the first uncertainty is statistical and the second is systematic.",
keywords = "B physics, Branching fraction, Exotics, Hadron-Hadron scattering (experiments), PP, X(3872), TOOL",
author = "{The LHCb Collaboration} and R. Aaij and {Abell{\'a}n Beteta}, C. and T. Ackernley and B. Adeva and M. Adinolfi and Aidala, {C. A.} and S. Aiola and Z. Ajaltouni and S. Akar and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and {Alfonso Albero}, A. and G. Alkhazov and {Alvarez Cartelle}, P. and Alves, {A. A.} and S. Amato and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and Andrews, {J. E.} and F. Archilli and {Arnau Romeu}, J. and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and Back, {J. J.} and S. Baker and V. Balagura and W. Baldini and A. Baranov and Barlow, {R. J.} and S. Barsuk and W. Barter and M. Bartolini and F. Baryshnikov and G. Bassi and V. Batozskaya and A. Bondar and S. Eidelman and V. Kudryavtsev and T. Maltsev and L. Shekhtman and Кроковный, {Павел Петрович} and Воробьев, {Виталий Сергеевич}",
year = "2019",
month = sep,
day = "1",
doi = "10.1007/JHEP09(2019)028",
language = "English",
volume = "2019",
journal = "Journal of High Energy Physics",
issn = "1029-8479",
publisher = "Springer US",
number = "9",

}

RIS

TY - JOUR

T1 - Observation of the Λb0→χc1 (3872) pK− decay

AU - The LHCb Collaboration

AU - Aaij, R.

AU - Abellán Beteta, C.

AU - Ackernley, T.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Aidala, C. A.

AU - Aiola, S.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Alves, A. A.

AU - Amato, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreassi, G.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Archilli, F.

AU - Arnau Romeu, J.

AU - Artamonov, A.

AU - Artuso, M.

AU - Arzymatov, K.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bachmann, S.

AU - Back, J. J.

AU - Baker, S.

AU - Balagura, V.

AU - Baldini, W.

AU - Baranov, A.

AU - Barlow, R. J.

AU - Barsuk, S.

AU - Barter, W.

AU - Bartolini, M.

AU - Baryshnikov, F.

AU - Bassi, G.

AU - Batozskaya, V.

AU - Bondar, A.

AU - Eidelman, S.

AU - Kudryavtsev, V.

AU - Maltsev, T.

AU - Shekhtman, L.

AU - Кроковный, Павел Петрович

AU - Воробьев, Виталий Сергеевич

PY - 2019/9/1

Y1 - 2019/9/1

N2 - Using proton-proton collision data, collected with the LHCb detector and corresponding to 1.0, 2.0 and 1.9 fb−1 of integrated luminosity at the centre-of-mass energies of 7, 8, and 13 TeV, respectively, the decay Λb0→χc1(3872)pK− with χc1(3872) → J/ψ π+π− is observed for the first time. The significance of the observed signal is in excess of seven standard deviations. It is found that (58 ± 15)% of the decays proceed via the two-body intermediate state χc1(3872)Λ(1520). The branching fraction with respect to that of the Λb0 → ψ(2S)pK− decay mode, where the ψ(2S) meson is reconstructed in the J/ψ π+π− final state, is measured to be:β(Λb0→χc1(3872)pK−)β(Λb0→ψ(2S)pK−)×β(χc1(3872)→J/ψπ+π−)β(ψ(2S)→J/ψπ+π−)=(5.4±1.1±0.2)×10−2, where the first uncertainty is statistical and the second is systematic.

AB - Using proton-proton collision data, collected with the LHCb detector and corresponding to 1.0, 2.0 and 1.9 fb−1 of integrated luminosity at the centre-of-mass energies of 7, 8, and 13 TeV, respectively, the decay Λb0→χc1(3872)pK− with χc1(3872) → J/ψ π+π− is observed for the first time. The significance of the observed signal is in excess of seven standard deviations. It is found that (58 ± 15)% of the decays proceed via the two-body intermediate state χc1(3872)Λ(1520). The branching fraction with respect to that of the Λb0 → ψ(2S)pK− decay mode, where the ψ(2S) meson is reconstructed in the J/ψ π+π− final state, is measured to be:β(Λb0→χc1(3872)pK−)β(Λb0→ψ(2S)pK−)×β(χc1(3872)→J/ψπ+π−)β(ψ(2S)→J/ψπ+π−)=(5.4±1.1±0.2)×10−2, where the first uncertainty is statistical and the second is systematic.

KW - B physics

KW - Branching fraction

KW - Exotics

KW - Hadron-Hadron scattering (experiments)

KW - PP

KW - X(3872)

KW - TOOL

UR - http://www.scopus.com/inward/record.url?scp=85073024720&partnerID=8YFLogxK

U2 - 10.1007/JHEP09(2019)028

DO - 10.1007/JHEP09(2019)028

M3 - Article

AN - SCOPUS:85073024720

VL - 2019

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

IS - 9

M1 - 28

ER -

ID: 21806783