Observation of the decay Λb0 → χc1pπ−

LHCb Collaboration

doi:10.1007/JHEP05(2021)095

Observation of the decay Λ_b⁰ → χ_c1pπ⁻

LHCb Collaboration

Physics and Astronomy

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

1 Citation (Scopus)

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Abstract

The Cabibbo-suppressed decay Λ_b⁰→ χ_c1pπ⁻ is observed for the first time using data from proton-proton collisions corresponding to an integrated luminosity of 6 fb⁻¹, collected with the LHCb detector at a centre-of-mass energy of 13 TeV. Evidence for the Λ_b⁰→ χ_c2pπ⁻ decay is also found. Using the Λ_b⁰→ χ_c1pK⁻ decay as normalisation channel, the ratios of branching fractions are measured to be

B(Λ_b⁰→χ_c1pπ⁻)/B(Λ_b⁰→χ_c1pK⁻) =(6.59±1.01±0.22)×10⁻²,
B(Λ_b⁰→χ_c2pπ⁻)/B(Λ_b⁰→χ_c1pπ⁻)= 0.95±0.30±0.04±0.04,
B(Λ_b⁰→χ_c2pK⁻)/B(Λ_b⁰→χ_c1pK⁻) = 1.06±0.05±0.04±0.04,

where the first uncertainty is statistical, the second is systematic and the third is due to the uncertainties in the branching fractions of χ_c1,2→ J/ψγ decays. [Figure not available: see fulltext.]

Original language	English
Article number	95
Number of pages	21
Journal	Journal of High Energy Physics
Volume	2021
Issue number	5
DOIs	https://doi.org/10.1007/JHEP05(2021)095
Publication status	Published - 12 May 2021

Bibliographical note

Publisher Copyright:
© 2021, The Author(s).

Keywords

B physics
Branching fraction
Hadron-Hadron scattering (experiments)
QCD
Quarkonium

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1007/JHEP05(2021)095Licence: Creative Commons: Attribution (CC BY)

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Cite this

@article{a9e149b3bfea420da982825c47bf3553,

title = "Observation of the decay Λb0 → χc1pπ−",

abstract = "The Cabibbo-suppressed decay Λb0→ χc1pπ− is observed for the first time using data from proton-proton collisions corresponding to an integrated luminosity of 6 fb−1, collected with the LHCb detector at a centre-of-mass energy of 13 TeV. Evidence for the Λb0→ χc2pπ− decay is also found. Using the Λb0→ χc1pK− decay as normalisation channel, the ratios of branching fractions are measured to be B(Λb0→χc1pπ−)/B(Λb0→χc1pK−) = (6.59±1.01±0.22)×10−2,B(Λb0→χc2pπ−)/B(Λb0→χc1pπ−) = 0.95±0.30±0.04±0.04,B(Λb0→χc2pK−)/B(Λb0→χc1pK−) = 1.06±0.05±0.04±0.04, where the first uncertainty is statistical, the second is systematic and the third is due to the uncertainties in the branching fractions of χc1,2→ J/ψγ decays. [Figure not available: see fulltext.]",

keywords = "B physics, Branching fraction, Hadron-Hadron scattering (experiments), QCD, Quarkonium",

author = "{LHCb Collaboration} and R. Aaij and {Abell{\'a}n Beteta}, C. and T. Ackernley and B. Adeva and M. Adinolfi and H. Afsharnia and Aidala, {C. A.} and S. Aiola and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and {Alfonso Albero}, A. and Z. Aliouche and G. Alkhazov and {Alvarez Cartelle}, P. and S. Amato and Y. Amhis and L. An and L. Anderlini and A. Andreianov and M. Andreotti and F. Archilli and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and M. Bachmayer and Back, {J. J.} and {Baladron Rodriguez}, P. and V. Balagura and W. Baldini and S. Bifani and R. Calladine and G. Chatzikonstantinidis and N. Cooke and V. Duk and P. Griffith and P. Ilten and Parkinson, {C. J.} and J. Plews and D. Popov and A. Sergi and Slater, {M. W.} and Swallow, {P. N.} and Watson, {N. K.}",

note = "Publisher Copyright: {\textcopyright} 2021, The Author(s).",

year = "2021",

month = may,

day = "12",

doi = "10.1007/JHEP05(2021)095",

language = "English",

volume = "2021",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer",

number = "5",

}

TY - JOUR

T1 - Observation of the decay Λb0 → χc1pπ−

AU - LHCb Collaboration

AU - Aaij, R.

AU - Abellán Beteta, C.

AU - Ackernley, T.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Afsharnia, H.

AU - Aidala, C. A.

AU - Aiola, S.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

AU - Aliouche, Z.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Amato, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreianov, A.

AU - Andreotti, M.

AU - Archilli, F.

AU - Artamonov, A.

AU - Artuso, M.

AU - Arzymatov, K.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bachmann, S.

AU - Bachmayer, M.

AU - Back, J. J.

AU - Baladron Rodriguez, P.

AU - Balagura, V.

AU - Baldini, W.

AU - Bifani, S.

AU - Calladine, R.

AU - Chatzikonstantinidis, G.

AU - Cooke, N.

AU - Duk, V.

AU - Griffith, P.

AU - Ilten, P.

AU - Parkinson, C. J.

AU - Plews, J.

AU - Popov, D.

AU - Sergi, A.

AU - Slater, M. W.

AU - Swallow, P. N.

AU - Watson, N. K.

PY - 2021/5/12

Y1 - 2021/5/12

N2 - The Cabibbo-suppressed decay Λb0→ χc1pπ− is observed for the first time using data from proton-proton collisions corresponding to an integrated luminosity of 6 fb−1, collected with the LHCb detector at a centre-of-mass energy of 13 TeV. Evidence for the Λb0→ χc2pπ− decay is also found. Using the Λb0→ χc1pK− decay as normalisation channel, the ratios of branching fractions are measured to be B(Λb0→χc1pπ−)/B(Λb0→χc1pK−) = (6.59±1.01±0.22)×10−2,B(Λb0→χc2pπ−)/B(Λb0→χc1pπ−) = 0.95±0.30±0.04±0.04,B(Λb0→χc2pK−)/B(Λb0→χc1pK−) = 1.06±0.05±0.04±0.04, where the first uncertainty is statistical, the second is systematic and the third is due to the uncertainties in the branching fractions of χc1,2→ J/ψγ decays. [Figure not available: see fulltext.]

AB - The Cabibbo-suppressed decay Λb0→ χc1pπ− is observed for the first time using data from proton-proton collisions corresponding to an integrated luminosity of 6 fb−1, collected with the LHCb detector at a centre-of-mass energy of 13 TeV. Evidence for the Λb0→ χc2pπ− decay is also found. Using the Λb0→ χc1pK− decay as normalisation channel, the ratios of branching fractions are measured to be B(Λb0→χc1pπ−)/B(Λb0→χc1pK−) = (6.59±1.01±0.22)×10−2,B(Λb0→χc2pπ−)/B(Λb0→χc1pπ−) = 0.95±0.30±0.04±0.04,B(Λb0→χc2pK−)/B(Λb0→χc1pK−) = 1.06±0.05±0.04±0.04, where the first uncertainty is statistical, the second is systematic and the third is due to the uncertainties in the branching fractions of χc1,2→ J/ψγ decays. [Figure not available: see fulltext.]

KW - B physics

KW - Branching fraction

KW - Hadron-Hadron scattering (experiments)

KW - QCD

KW - Quarkonium

UR - http://www.scopus.com/inward/record.url?scp=85105888527&partnerID=8YFLogxK

U2 - 10.1007/JHEP05(2021)095

DO - 10.1007/JHEP05(2021)095

M3 - Article

AN - SCOPUS:85105888527

SN - 1126-6708

VL - 2021

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 5

M1 - 95

ER -