Measuring sparticle masses in non-universal string inspired models at the LHC

By Benjamin C. Allanach, Christopher Gorham Lester, M. Parker, Bryan R. Webber. 2000

195 citations recorded by the source corpus.

We demonstrate that some of the suggested five supergravity points for study at the LHC could be approximately derived from perturbative string theories or M-theory, but that charge and colour breaking minima would result. As a pilot study, we then analyse a perturbative string model with non-universal soft masses that are optimised in order to avoid global charge and colour breaking minima. By combining measurements of up to six kinematic edges from squark decay chains with data from a new kinematic variable, designed to improve slepton mass measurements, we demonstrate that a typical LHC experiment will be able to determine squark, slepton and neutralino masses with an accuracy sufficient to permit an optimised model to be distinguished from a similar standard SUGRA point. The technique thus generalizes SUSY searches at the LHC.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/7e34dcc17572231375f99c6ecd2840c6dd9d1bbf

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In Nuclear and High Energy Physics

Citations in the corpus

A review of the mass measurement techniques proposed for the Large Hadron Collider (2010, methodology): “There is definitely a clear benefit to be derived from critically (re-)examining the choices of one-dimensional distributions used to constrain the qll-chain for there is no reason to believe that the “traditional” choices of endpoint [76, 77] are optimal in any sense – indeed it is very unlikely th”
Distinguishing Spins in Supersymmetric and Universal Extra Dimension Models at the Large Hadron Collider (2005, background): “[2] [3] or some other means, and it remains to decide whether the decay angular distributions agree better with the SUSY or UED spin assignments.”
Supersymmetric particle mass measurement with the boost-corrected contransverse mass (2009, background): “Starting from this end-point, and combining it with the hard jets in the events it is possible to measure the masses of ˜, ˜ χ 0 ˜ l and ˜ χ 0 [3, 20, 21 ].”
Approximating Likelihood Ratios with Calibrated Discriminative Classifiers (2015, methodology): “…here could have major impact include the measurement of coefficients to quantum mechanical operators describing the production and decay of the Higgs boson (Chen et al., 2015) and, if we are so lucky, measurement of the mass of supersymmetric particles in cascade decays (Allanach et al., 2000).”