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O-8 - MoEDAL found no trapped magnetic charge at or above one Dirac charge in 794 kg of aluminum exposed to 13 TeV LHC collisions

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Properties6
type
observation
id
O-8
statement
All 2400 aluminum samples of the full MoEDAL trapping detector (794 kg, forward + lateral regions at the LHCb interaction point), exposed to 4.0 fb^-1 of 13 TeV pp collisions in 2015-2017, were scanned at least twice with a dc SQUID magnetometer; no sample contained a persistent magnetic charge >= 1 g_D. All 87 above-threshold (>0.4 g_D) candidate samples resolved to instrumental artifacts on repeated scans; the estimated false-negative probability at 1 g_D is below 0.2 percent.
source
S-31 - MoEDAL Collaboration 2019, Magnetic monopole search with the full MoEDAL trapping detector in 13 TeV pp collisions
locator
pp. 2-3, figs. 2-3
link_state
orphan

Calibration by two independent methods (dipole-sample superposition and long thin solenoid) agreeing within 10 percent; magnetometer response linear and charge-symmetric over 0.3-300 g_D. The trapping null itself is model-independent: it assumes only that a slow (beta ⇐ 10^-3) monopole binds strongly to aluminum nuclei.

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