Electroweak penguin measurements
Marcin Jakub Chrzaszcz · CERN Document Server (European Organization for Nuclear Research) · 2015
Electroweak penguin measurements 1/30 . . . 1 / 30 • Excellent Impact Parameter (IP) resolution (20 µm).⇒ Identify secondary vertices from heavy flavour decays • Proper time resolution ∼ 40 fs.⇒ Good separation of primary and secondary vertices.• Excellent momentum (δp/p ∼ 0.4 -0.6%) and inv.mass resolution.⇒ Low combinatorial background. Marcin Chrząszcz (Universität Zürich, IFJ PAN)Electroweak penguin measurements 4/30 . . . 4 / 30 .LHCb detector -particle identification⇒ Reject peaking backgrounds.• High trigger efficiencies, low momentum thresholds.Muons: p T > 1.76GeV at L0, p T > 1.0GeV at HLT1, B → J/ψX: Trigger ∼ 90%.