Extracting MSSM Masses From Heavy Higgs Decays to Four Leptons at the LHC

Details Extracting MSSM Masses From Heavy Higgs Decays to Four Leptons at the LHC Extracting MSSM Masses From Heavy Higgs Decays to Four Leptons at the LHC

2007-12-29

arxiv.org/abs/0801.0041v3

Phys.Rev.D77:075011,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

version to be published in PRD

Scientific paper

10.1103/PhysRevD.77.075011

It is well known that finding and measuring the masses of particles in the Minimal Supersymmetric Standard Model (MSSM) at the Large Hadron Collider (LHC) may be possible using invariant mass distributions in exclusive channels containing n_j jets and n_l leptons. We perform this analysis for the (n_j, n_l) = (0,4) decay of heavy Higgs bosons to neutralinos, pp \to H/A \to \chi_i \chi_j (i,j =2,3,4), which then decay to four leptons and two lightest neutralinos \chi_1 via on-shell sleptons. When i=j and the sleptons are degenerate, our Monte Carlo study shows that the LHC will be able to measure the Higgs and relevant neutralino and slepton masses to roughly 30%; however, if one of these is already known within 5%, the other three may be found to equal or better accuracy. This would provide the first accurate measurement of the H/A mass via invariant mass distribution techniques.

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