Ascertaining the spin for new resonances decaying into tau+ tau- at   Hadron Colliders
  Evidence of a new particle with mass ~125 GeV decaying into a pair of tau leptons at the Large Hadron Collider spurs interest in ascertaining its spin in this channel. Here we present a comparative study between spin-0 and spin-2 nature of this new particle, using spin correlations and decay product directions. The TauSpinner algorithm is used to re-weight distributions from qqbar -> gamma/Z -> tau+ tau- sample to simulate a spin-2 state exchange. The method is based on supplementing the Standard Model matrix elements with those arising from presence of a new interaction. Studies with simulated samples demonstrate the discrimination power between these spin hypotheses based on data collected at the Large Hadron Collider. 
Swagato Banerjee, Jan Kalinowski, Wojciech Kotlarski, Tomasz   Przedzinski and Zbigniew Was
hep-ph hep-ex