On measuring the masses of pair-produced semi-invisibly decaying particles at hadron colliders

By D. Tovey. 2008

233 citations recorded by the source corpus.

A straightforward new technique is introduced which enables measurement at hadron colliders of an analytical combination of the masses of pair-produced semi-invisibly decaying particles and their invisible decay products. The new technique makes use of the invariance under contra-linear Lorentz boosts of a simple combination of the transverse momentum components of the aggregate visible products of each decay chain. In the general case where the invariant masses of the visible decay products are non-zero it is shown that in principle the masses of both the initial particles from the hard scattering and the invisible particles produced in the decay chains can be determined independently. This application is likely to be difficult to realise in practice however due to the contamination of the final state with ISR jets. The technique may be of most use for measurements of SUSY particle masses at the LHC, however the technique should be applicable to any class of hadron collider events in which heavy particles of unknown mass are pair-produced and decay to semi-invisible final states.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/d36a417b19f3eb9e696923de3497d4167b1d877d

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Citations in the corpus

Supersymmetric particle mass measurement with the boost-corrected contransverse mass (2009, methodology): “and this was shown in ref. [ 9 ] to be invariant under such boosts.”
Using subsystem MT2 for complete mass determinations in decay chains with missing energy at hadron colliders (2008, methodology): “These methods explore the transverse invariant mass variable MT2 originally proposed in [13] and later used and developed in [17,24,26,28,37,40,41, 45].”
A review of the mass measurement techniques proposed for the Large Hadron Collider (2010, methodology): “8 Historically this was how MCT was first defined in [122].”
Physics and Detectors at CLIC: CLIC Conceptual Design Report (2012, methodology): “, Analysis of the neutralino system in supersymmetric theories: Addendum, 2002, hep-ph/0202039 [49] G.”
The hunt for the rest of the Higgs bosons (2015, methodology): “SRA is divided into five subregions based on the contransverse mass cut [82] (with ISR correction given in [83]), and the ATLAS observed limits on the cross sections in SRA range from 0.”
Toward a public analysis database for LHC new physics searches using MADANALYSIS 5 (2014, background): “As a final selection, five different thresholds on the contransverse mass mCT [47] ranging from 150 to 350 GeV are demanded to reduce backgrounds from top-quark production.”