Abstract
The Cabibbo-suppressed decay Λb 0 → ψ(2S)pπ− is observed for the first time using a data sample collected by the LHCb experiment in proton-proton collisions corresponding to 1.0, 2.0 and 1.9 fb−1 of integrated luminosity at centre-of-mass energies of 7, 8 and 13 TeV, respectively. The ψ(2S) mesons are reconstructed in the μ+μ− final state. The branching fraction with respect to that of the Λb 0 → ψ(2S)pK− decay mode is measured to be ℬ(Λb0→ψ(2S)pπ−)ℬ(Λb0→ψ(2S)pK−)=(11.4±1.3±0.2)%, where the first uncertainty is statistical and the second is systematic. The ψ(2S)p and ψ(2S)π− mass spectra are investigated and no evidence for exotic resonances is found.[Figure not available: see fulltext.].
Original language | English (US) |
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Article number | 131 |
Journal | Journal of High Energy Physics |
Volume | 2018 |
Issue number | 8 |
DOIs | |
State | Published - Aug 1 2018 |
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Keywords
- B physics
- Flavor physics
- Hadron-Hadron scattering (experiments)
- Spectroscopy
ASJC Scopus subject areas
- Nuclear and High Energy Physics
Cite this
Observation of the decay Λ b 0 → ψ(2S)pπ− . / The Lhcb Collaboration.
In: Journal of High Energy Physics, Vol. 2018, No. 8, 131, 01.08.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Observation of the decay Λ b 0 → ψ(2S)pπ−
AU - The Lhcb Collaboration
AU - Aaij, R.
AU - Adeva, B.
AU - Adinolfi, M.
AU - Aidala, C. A.
AU - Ajaltouni, Z.
AU - Akar, S.
AU - Albicocco, P.
AU - Albrecht, J.
AU - Alessio, F.
AU - Alexander, M.
AU - Alfonso Albero, A.
AU - Ali, S.
AU - Alkhazov, G.
AU - Alvarez Cartelle, P.
AU - Alves, A. A.
AU - Amato, S.
AU - Amerio, S.
AU - Amhis, Y.
AU - An, L.
AU - Anderlini, L.
AU - Andreassi, G.
AU - Andreotti, M.
AU - Andrews, J. E.
AU - Appleby, R. B.
AU - Archilli, F.
AU - d’Argent, P.
AU - Arnau Romeu, J.
AU - Artamonov, A.
AU - Artuso, Marina
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 - Baryshnikov, F.
AU - Batozskaya, V.
AU - Batsukh, B.
AU - Battista, V.
AU - Blusk, Steven Roy
AU - Rudolph, Matthew
AU - Skwarnicki, Tomasz
AU - Stone, Sheldon
PY - 2018/8/1
Y1 - 2018/8/1
N2 - The Cabibbo-suppressed decay Λb 0 → ψ(2S)pπ− is observed for the first time using a data sample collected by the LHCb experiment in proton-proton collisions corresponding to 1.0, 2.0 and 1.9 fb−1 of integrated luminosity at centre-of-mass energies of 7, 8 and 13 TeV, respectively. The ψ(2S) mesons are reconstructed in the μ+μ− final state. The branching fraction with respect to that of the Λb 0 → ψ(2S)pK− decay mode is measured to be ℬ(Λb0→ψ(2S)pπ−)ℬ(Λb0→ψ(2S)pK−)=(11.4±1.3±0.2)%, where the first uncertainty is statistical and the second is systematic. The ψ(2S)p and ψ(2S)π− mass spectra are investigated and no evidence for exotic resonances is found.[Figure not available: see fulltext.].
AB - The Cabibbo-suppressed decay Λb 0 → ψ(2S)pπ− is observed for the first time using a data sample collected by the LHCb experiment in proton-proton collisions corresponding to 1.0, 2.0 and 1.9 fb−1 of integrated luminosity at centre-of-mass energies of 7, 8 and 13 TeV, respectively. The ψ(2S) mesons are reconstructed in the μ+μ− final state. The branching fraction with respect to that of the Λb 0 → ψ(2S)pK− decay mode is measured to be ℬ(Λb0→ψ(2S)pπ−)ℬ(Λb0→ψ(2S)pK−)=(11.4±1.3±0.2)%, where the first uncertainty is statistical and the second is systematic. The ψ(2S)p and ψ(2S)π− mass spectra are investigated and no evidence for exotic resonances is found.[Figure not available: see fulltext.].
KW - B physics
KW - Flavor physics
KW - Hadron-Hadron scattering (experiments)
KW - Spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85052293546&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85052293546&partnerID=8YFLogxK
U2 - 10.1007/JHEP08(2018)131
DO - 10.1007/JHEP08(2018)131
M3 - Article
AN - SCOPUS:85052293546
VL - 2018
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
SN - 1126-6708
IS - 8
M1 - 131
ER -