4.4 Article

A hybrid method for determining particle masses at the Large Hadron Collider with fully identified cascade decays

Journal

JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 5, Pages -

Publisher

SPRINGER
DOI: 10.1088/1126-6708/2008/05/014

Keywords

hadron-hadron scattering.

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A new technique for improving the precision of measurements of SUSY particle masses at the LHC is introduced. The technique involves kinematic fitting of events with two fully identified decay chains. We incorporate both event E miss T constraints and independent constraints provided by kinematic end-points in experiment invariant mass distributions of SUSY decay products. Incorporation of the event specific information maximises the information used in the fit and is shown to reduce the mass measurement uncertainites by similar to 30% compared to conventional fitting of experiment end-point constraints for the SPS1a benchmark model.

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