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Mass Estimation without using MET in early LHC data

2010/07/02 by Zhitao Kang, Kang, Z., N. Kersting +3
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Distributed and Parallel Computing Systems #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies

paper · pdf · doi:10.48550/arxiv.1007.0382

openalex publication_date 2010/07/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Many techniques exist to reconstruct New Physics masses from LHC data, though these tend to either require high luminosity O(100) fb-1, or an accurate measurement of missing transverse energy (MET) which may not be available in the early running of the LHC. Since in popular models such as SUSY a fairly sharp, triangular dilepton invariant mass spectrum can emerge already at low luminosity O(1) fb-1, a Decay Kinematics (DK) technique can be used on events near the dilepton mass endpoint to estimate squark, slepton, and neutralino masses without relying on MET. With the first 2 fb-1 of 7 TeV LHC data SPS1a masses can thus be found to 20% or better accuracy, at least several times better than what has been taken to be achievable.

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