Variable/Method
| Reference(s)/Code
| Realm of Applicability
| Precision
| Good for
| Fails for
| Unknown/Future directions
|
MT
| (ancient)
| one missing particle
|
Meff
| hep-ph/9610544[1], hep-ph/0006276[2]
| Discovery of NP with massive particles.
| Bad, quoted to be 20%-50% on masses in references, but needs to be interpreted in a specific model.
| Discovery above SM contribution and estimating mass scale of particles with dominant cross section.
| Does not identify process, but gives some information on particle content of dominant topologies.
|
HT
|
| always
|
|
| does not identify process in any way
|
Edges
| hep-ph/9610544[3] (lots)
| Cascade decay chains. Gives one relationship between NP masses per pair of visible final state particles.
| Quoted as 4% on LSP in fast simulation pheno study of SPS1a, hep-ph/0410303 [4]
| Mass differences in leptonic decays.
| Dependence on absolute mass scale is weak. Can be fooled by false solutions.
| Intermediate 3-body decays? Combinatoric (other side) jets not considered. Calorimeter nonlinearity?
|
MT2
| hep-ph/9906349[5]
|
MT2 kink ("stransverse" mass)
| arXiv:0709.0288[6]
| 4-body final state, 2 missing
|
| large mass differences and large pT
| small mass differences or no pT
|
MTn
|
| 4-body final state, n missing
|
MTgen
| arXiv:0708.1028[7]
|
M2C
| arXiv:0712.0943[8]
|
M3C
| arXiv:0811.2138[9]
|
| arXiv:0812.1042[10]
|
Exactly-constrained Polynomials
| arXiv:0707.0030[11]
| 4 on-shell intermediate resonances, 2 missing
|
|
|
| Apply to squark-neutralino2-slepton-neutralino1 cascade where other side is squark-neutralino1.
|
Multi-event Polynomial intersection
| arXiv:0802.4290[12]
| 5 or more on-shell intermediate resonances, 2 missing
|
|
|
| Statistics of histograms created with n-event subsets; If mass differences are fixed and the masses are increased, what happens? (Sabine Kraml); Develop methods for asymmetric chains and < 6 intermediate resonances.
|