https://doi.org/10.1140/epjc/s10052-013-2313-1
Special Article - Tools for Experiment and Theory
Ascertaining the spin for new resonances decaying into
at hadron colliders
1
Department of Physics, University of Wisconsin, Madison, WI, 53706, USA
2
Faculty of Physics, University of Warsaw, ul. Hoża 69, Warsaw, Poland
3
Faculty of Physics, Astronomy and Applied Computer Science, Jagellonian University, Reymonta 4, 30-059, Kraków, Poland
4
Institute of Nuclear Physics, PAN, ul. Radzikowskiego 152, Kraków, Poland
5
CERN PH-TH, 1211, Geneva 23, Switzerland
* e-mail: jan.kalinowski@fuw.edu.pl
Received:
31
December
2012
Revised:
31
January
2013
Published online:
13
February
2013
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 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.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013