@misc{10481/95952,
year = {2017},
month = {1},
url = {https://hdl.handle.net/10481/95952},
abstract = {Differential cross sections are presented for the prompt and non-prompt production of the hidden-charm states X(3872) and ψ(2S), in the decay mode J/ψπ+π−, measured using 11.4 fb−1 of pp collisions at √s = 8 TeV by the ATLAS detector at the LHC. The ratio of cross-sections X(3872)/ψ(2S) is also given, separately for prompt and non-prompt components, as well as the non-prompt fractions of X(3872) and ψ(2S). Assuming independent single effective lifetimes for non-prompt X(3872) and ψ(2S) production gives Rb = (B(B→X(3872) + any)B(X(3872)→J/ψπ+π-))/(B(B→ψ(2S) + any)B(ψ(2S)→J/ψπ+π-)) = (3.95±0.32(stat) ±0.08(sys)) × 10-2, while separating short- and long-lived contributions, assuming that the short-lived component is due to Bc decays, gives RB = (3.57 ± 0.33(stat) ± 0.11(sys)) × 10−2, with the fraction of non-prompt X(3872) produced via B c decays for p T(X(3872)) > 10 GeV being (25 ± 13(stat) ± 2(sys) ± 5(spin))%. The distributions of the dipion invariant mass in the X(3872) and ψ(2S) decays are also measured and compared to theoretical predictions.},
organization = {CERN},
organization = {MINECO},
organization = {EPLANET},
organization = {ERC},
organization = {ERDF},
organization = {FP7},
organization = {Horizon 2020},
organization = {Marie Skłodowska-Curie Actions},
organization = {CERCA Programme Generalitat de Catalunya},
organization = {Generalitat Valenciana},
publisher = {Springer Nature},
keywords = {B physics},
keywords = {Hadron-Hadron scattering (experiments)},
title = {Measurements of ψ(2S) and X(3872) → J/ψπ+π− production in pp collisions at √s = 8 TeV with the ATLAS detector},
doi = {10.1007/JHEP01(2017)117},
author = {Aaboud, M. and Aguilar Saavedra, Juan Antonio and Atlas Collaboration, /},
}