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Resummation schemes for high-electric-charge objects leading to improved experimental mass limits
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High-Electric-Charge compact Objects (HECOs) appear in several theoretical particle physics models beyond the Standard Model, and are actively searched for in current colliders, such as the Large Hadron Collider at CERN. In such searches, mass bounds of these objects have been placed, using Drell-Yan and photon-fusion processes at tree level so far. However, such mass-bound estimates are not reliable, given that, as a result of the large values of the electric charge of the HECO, perturbative Quantum Electrodynamics calculations break down. In this work, we perform a Dyson-Schwinger resummation scheme (as opposed to lattice strong-coupling approach), which makes the computation of the pertinent HECO-production cross sections reliable, thus allowing us to extract improved mass bounds for such objects from ATLAS and MoEDAL searches.
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Impact of resummation on the production and experimental bounds of scalar high-electric-charge objects
For scalar HECOs, a Dyson-Schwinger resummation raises predicted LHC production cross sections and strengthens 95% CL mass bounds by up to about 30% compared with tree-level estimates.
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