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Production of Upsilon(1S) Mesons from chi(b) Decays in p anti-p Collisions at s**(1/2) = 1.8 TeV

Lancaster, M; Waters, DCDFC; (2000) Production of Upsilon(1S) Mesons from chi(b) Decays in p anti-p Collisions at s**(1/2) = 1.8 TeV. Physical Review Letters , 84 (10) 2094 -2099. 10.1103/PhysRevLett.84.2094. Green open access

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Abstract

We have reconstructed the radiative decays χb(1P)→ϒ(1S)γ and χb(2P)→ϒ(1S)γ in pp̅ collisions at √s = 1.8TeV, and measured the fraction of ϒ(1S) mesons that originate from these decays. For ϒ(1S) mesons with pTϒ>8.0GeV/c, the fractions that come from χb(1P) and χb(2P) decays are [27.1±6.9(stat)±4.4(syst)]% and [10.5±4.4(stat)±1.4(syst)]%, respectively. We have derived the fraction of directly produced ϒ(1S) mesons to be [50.9±8.2(stat)±9.0(syst)]%.

Type: Article
Title: Production of Upsilon(1S) Mesons from chi(b) Decays in p anti-p Collisions at s**(1/2) = 1.8 TeV
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.84.2094
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.84.2094
Language: English
Additional information: © 2000 The American Physical Society
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/131943
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