TY - JOUR
T1 - Measurement of the branching ratio $\Gamma(\Lambda_b^0 \rightarrow \psi(2S)\Lambda^0)/\Gamma(\Lambda_b^0 \rightarrow J/\psi\Lambda^0)$ with the ATLAS detector
AU - Clark, Philip James
AU - Leonidopoulos, Christos
AU - Martin, Victoria Jane
AU - Mills, Corrinne
AU - Collaboration, Atlas
PY - 2015/12/17
Y1 - 2015/12/17
N2 - An observation of the Λb0→ψ(2S)Λ0 decay and a comparison of its branching fraction with that of the Λb0→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 Λb0 baryons are reconstructed with transverse momentum pT>10 GeV and pseudorapidity |η|
AB - An observation of the Λb0→ψ(2S)Λ0 decay and a comparison of its branching fraction with that of the Λb0→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 Λb0 baryons are reconstructed with transverse momentum pT>10 GeV and pseudorapidity |η|
U2 - 10.1016/j.physletb.2015.10.009
DO - 10.1016/j.physletb.2015.10.009
M3 - Article
SN - 0370-2693
VL - B751
SP - 63
EP - 80
JO - Physics Letters B
JF - Physics Letters B
M1 - Aad:2015msa
ER -