literature

A General method for determining the masses of semi-invisibly decaying particles at hadron colliders

Oct, 2009
5 pages
Published in:
  • Phys.Rev.Lett. 107 (2011) 061801
e-Print:

Citations per year

20092012201520182021051015
Abstract: (arXiv)
We present a general solution to the long standing problem of determining the masses of pair-produced, semi-invisibly decaying particles at hadron colliders. We define two new transverse kinematic variables, MCTM_{CT_\perp} and MCTM_{CT_\parallel}, which are suitable one-dimensional projections of the contransverse mass MCTM_{CT}. We derive analytical formulas for the boundaries of the kinematically allowed regions in the (MCT,MCT)(M_{CT_\perp},M_{CT_\parallel}) and (MCT,MCT)(M_{CT_\perp},M_{CT}) parameter planes, and introduce suitable variables DCTD_{CT_\parallel} and DCTD_{CT} to measure the distance to those boundaries on an event per event basis. We show that the masses can be reliably extracted from the endpoint measurements of MCTmaxM_{CT_\perp}^{max} and DCTminD_{CT}^{min} (or DCTminD_{CT_\parallel}^{min}). We illustrate our method with dilepton ttˉt\bar{t} events at the LHC.
  • 13.85.Ni
  • 14.80.Ly
  • 13.85.Qk
  • kinematics
  • new particle: mass spectrum
  • new particle: decay
  • new particle: mass
  • transverse momentum
  • hadron hadron: inclusive reaction
  • postulated particle: hadroproduction