Weighing Wimps with Kinks at Colliders: Invisible Particle Mass Measurements from Endpoints

Details Weighing Wimps with Kinks at Colliders: Invisible Particle Mass Measurements from Endpoints Weighing Wimps with Kinks at Colliders: Invisible Particle Mass Measurements from Endpoints

2007-11-24

arxiv.org/abs/0711.4008v1

JHEP 0802:014,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

42 pages, 12 figures

Scientific paper

10.1088/1126-6708/2008/02/014

We consider the application of endpoint techniques to the problem of mass determination for new particles produced at a hadron collider, where these particles decay to an invisible particle of unknown mass and one or more visible particles of known mass. We also consider decays of these types for pair-produced particles and in each case consider situations both with and without initial state radiation. We prove that, in most (but not all) cases, the endpoint of an appropriate transverse mass observable, considered as a function of the unknown mass of the invisible particle, has a kink at the true value of the invisible particle mass. The co-ordinates of the kink yield the masses of the decaying particle and the invisible particle. We discuss the prospects for implementing this method at the LHC.

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