Amplification of endpoint structure for new particle mass measurement at the LHC

Details Amplification of endpoint structure for new particle mass measurement at the LHC Amplification of endpoint structure for new particle mass measurement at the LHC

2009-12-14

arxiv.org/abs/0912.2354v3

Phys.Rev.D81:095010,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX file of 14 pages with 6 figures, small clarifications and more cuts on simulation, version to appear in Phys. Rev. D.

Scientific paper

10.1103/PhysRevD.81.095010

We introduce a new collider variable, MCT2, named as constransverse mass. It is a mixture of `stransverse mass(MT2)' and `contransverse mass(MCT)' variables, where the usual endpoint structure of MT2 distribution can be amplified in the MCT2 basis by large Jacobian factor which is controlled by trial missing particle mass. Thus the MCT2 projection of events increases our observability to measure several important endpoints from new particle decays, which are usually expected to be buried by irreducible backgrounds with various systematic uncertainties at the LHC. In this paper we explain the phenomenology of endpoint amplification in MCT2 projection, and describe how one may employ this variable to measure several meaningful mass constraints of new particles.

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