Prospects for Yukawa Unified SO10 SUSY GUTs at the CERN LHC - High Energy Physics - PhenomenologyReport as inadecuate

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Abstract: The requirement of t-b-\tau Yukawa coupling unification is common in simplegrand unified models based on the gauge group SO10, and it also places asevere constraint on the expected spectrum of superpartners. For Yukawa-unifiedmodels with \mu >0, the spectrum is characterized by three mass scales: {\iti}. first and second generation scalars in the multi-TeV range, {\it ii}.third generation scalars, \mu and m A in the few-TeV range and {\it iii}.gluinos in the \sim 350-500 GeV range with chargino masses around 100-160 GeV.In such a scenario, gluino pair production should occur at large rates at theCERN LHC, followed by gluino three-body decays into neutralinos or charginos.Discovery of Yukawa-unified SUSY at the LHC should hence be possible with only1 fb^{-1} of integrated luminosity, by tagging multi-jet events with 2-3isolated leptons, without relying on missing E T. A characteristic dileptonmass edge should easily be apparent above Standard Model background. Combiningdileptons with b-jets, along with the gluino pair production cross sectioninformation, should allow for gluino and neutralino mass reconstruction. Asecondary corroborative signal should be visible at higher integratedluminosity in the W1Z2-> 3\ell channel, and should exhibit the same dileptonmass edge as in the gluino cascade decay signal.

Author: Howard Baer, Sabine Kraml, Sezen Sekmen, Heaya Summy


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