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Phys. Rev. D 80, 035020 (2009) [18 pages]Accurate mass determinations in decay chains with missing energy: II
Received 20 May 2009; published 25 August 2009
We discuss kinematic methods for determining the masses of the particles in events at a hadron collider in which a pair of identical particles is produced with each decaying via a series of on shell intermediate beyond-the-standard model (BSM) particles to visible standard model (SM) particles and an invisible particle (schematically, pp-->ZZ+jets with Z-->Aa-->Bba-->Ccba-->…-->cba…+N where a,b,c,… are visible SM particles or groups of SM particles, A,B,C,… are on shell BSM particles, and N is invisible). This topology arises in many models including supersymmetry (SUSY) processes such as squark and gluino pair production and decay. We present the detailed procedure for the case of Z-->3 visible particles+N and demonstrate that the masses obtained from the kinematic procedure are independent of the model by comparing SUSY to universal extra dimensions. ©2009 The American Physical Society
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