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Search for heavy long-lived multi-charged particles in proton-proton collisions at $\sqrt{s}$ = 13 TeV using the ATLAS detector

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arxiv 1812.03673 v2 pith:HGDWZEKH submitted 2018-12-10 hep-ex

classification hep-ex
keywords particleslong-livedmulti-chargedatlascollisionsdetectorelectricheavy
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

A search for heavy long-lived multi-charged particles is performed using the ATLAS detector at the LHC. Data with an integrated luminosity of 36.1 fb$^{-1}$ collected in 2015 and 2016 from proton-proton collisions at $\sqrt{s}$ = 13 TeV are examined. Particles producing anomalously high ionization, consistent with long-lived massive particles with electric charges from |q|=2e to |q|=7e, are searched for. No events are observed, and 95% confidence level cross-section upper limits are interpreted as lower mass limits for a Drell-Yan production model. Multi-charged particles with masses between 50 GeV and 980-1220 GeV (depending on their electric charge) are excluded.

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  1. Impact of resummation on the production and experimental bounds of scalar high-electric-charge objects

    hep-ph 2024-12 conditional novelty 5.0 of 10

    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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