Kinematic Cusps: Determining the Missing Particle Mass at the LHC
Presented by Dr. Ian-Woo KIM on 28 Jul 2009 from 17:50 to 18:10
Session: Beyond the Standard Model II
Track: Beyond the Standard Model
Considering two missing energy particles with odd parity can be decayed from a heavy particle with even parity by two-step cascade, we observe kinematic cusp structures in invariant mass distributions of resonant particle decay into missing particles. Knowing a parent mass from direct resonant decay into standard model particles, we determine the mass of the intermediate particle and the final state missing particle by using the cusped peak and the end point of the distribution. The shape of the cusp distribution does not depend much on the spins and chiral couplings of the particles involved. These features may help identifying the masses of the missing particles for various new physics with weak scale dark matter at the LHC.