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Measurement of the branching ratio Gcyrillic(Λb 0→ψ(2S)Λ0)/G(Λb 0→J/ψΛ0) with the ATLAS detector

Aad G.
•
Abbott B.
•
Abdallah J.
altro
Zwalinski L.
2015
  • journal article

Periodico
PHYSICS LETTERS. SECTION B
Abstract
An observation of the Λb 0→ψ(2S)Λ0 decay and a comparison of its branching fraction with that of the Λb 0→J/ψΛ0 decay has been made with the ATLAS detector in proton-proton collisions at s=8 TeV at the LHC using an integrated luminosity of 20.6 fb-1. The J/ψ and ψ(2S) mesons are reconstructed in their decays to a muon pair, while the Λ0→ pπ- decay is exploited for the Λ0 baryon reconstruction. The Λb 0 baryons are reconstructed with transverse momentum pT>10 GeV and pseudorapidity |η|<2.1. The measured branching ratio of the Λb 0→ψ(2S)Λ0 and Λb 0J/ψΛ0 decays is Gcyrillic(Λb 0→ψ(2S)Λ0/Gcyrillic(Λb 0J/ψΛ0)=0.501±0.033(stat)±0.019(syst), lower than the expectation from the covariant quark model. © 2015 The Authors.
DOI
10.1016/j.physletb.2015.10.009
WOS
WOS:000365384600013
Archivio
http://hdl.handle.net/11390/1109578
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85042517730
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84945260682&amp;partnerID=40&amp;md5=002a0a8d63275cdc6c2ca5d046fbfe6b
Diritti
metadata only access
Scopus© citazioni
13
Data di acquisizione
Jun 2, 2022
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Web of Science© citazioni
13
Data di acquisizione
Mar 23, 2024
Visualizzazioni
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Data di acquisizione
Apr 19, 2024
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