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

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

2007-12-17

arxiv.org/abs/0712.2718v2

JHEP 0805:014,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 2 .eps figures, JHEP3 style

Scientific paper

10.1088/1126-6708/2008/05/014

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 ETmiss 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 ~30% compared to conventional fitting of experiment end-point constraints for the SPS1a benchmark model.

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