Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-10-27
Phys.Rev.D79:031701,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, 10 figures, typos are corrected, figures are replaced
Scientific paper
10.1103/PhysRevD.79.031701
We propose a scheme to assign a 4-momentum to each WIMP in new physics event producing a pair of mother particles each of which decays to an invisible weakly interacting massive particle (WIMP) plus some visible particle(s). The transverse components are given by the value that determines the event variable M_T2, while the longitudinal component is determined by the on-shell condition on the mother particle. Although it does not give the true WIMP momentum in general, this M_T2-assisted on-shell reconstruction of missing momenta provides kinematic variables well correlated to the true WIMP momentum, and thus can be useful for an experimental determination of new particle properties. We apply this scheme to some processes to measure the mother particle spin, and find that spin determination is possible even without a good knowledge of the new particle masses.
Cho Won Sang
Choi Kiwoon
Kim Yeong Gyun
Park Chan Beom
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