M-T2-assisted on-shell reconstruction of missing momenta and its application to spin measurement at the LHC

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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 good knowledge of the new particle masses.
Publisher
AMER PHYSICAL SOC
Issue Date
2009-02
Language
English
Article Type
Article
Keywords

HADRON COLLIDERS; MEASURING MASSES; SUPERSYMMETRY; PHYSICS

Citation

PHYSICAL REVIEW D, v.79

ISSN
1550-7998
DOI
10.1103/PhysRevD.79.031701
URI
http://hdl.handle.net/10203/99283
Appears in Collection
PH-Journal Papers(저널논문)
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