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Discovering the physics of ( g − 2 ) μ at future muon colliders
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C P -violating Higgs boson ditau decays: Baryogenesis and Higgs factories
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Learning from many collider events at once
There have been a number of recent proposals to enhance the performance of machine learning strategies for collider physics by combining many distinct events into a single ensemble feature. To evaluate the efficacy of these proposals, we study the connection between single-event classifiers and multievent classifiers under the assumption that collider events are independent and identically distributed. We show how one can build optimal multievent classifiers from single-event classifiers, and we also show how to construct multievent classifiers such that they produce optimal single-event classifiers. This is illustrated for a Gaussian example as well as for classification tasks relevant for searches and measurements at the Large Hadron Collider. We extend our discussion to regression tasks by showing how they can be phrased in terms of parametrized classifiers. Empirically, we find that training a single-event (per-instance) classifier is more effective than training a multievent (per-ensemble) classifier, as least for the cases we studied, and we relate this fact to properties of the loss function gradient in the two cases. While we did not identify a clear benefit from using multievent classifiers in the collider context, we speculate on the potential value of these methods in cases involving only approximate independence, as relevant for jet substructure studies.
Distribution of supersymmetry μ parameter and Peccei-Quinn scale f a from the landscape
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Sensitivity to millicharged particles in future proton-proton collisions at the LHC with the milliQan detector
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Coherent elastic neutrino-nucleus scattering with the ν BDX − DRIFT directional detector at next generation neutrino facilities
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Simulation-assisted decorrelation for resonant anomaly detection
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Signal of four muons or more from a vector-like lepton decaying to a muon-philic Z ′ boson at the LHC
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Baryogenesis via leptogenesis: Spontaneous B and L violation
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Heavy Higgs bosons in 2HDM at a muon collider
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Inelastic dark matter at the Fermilab Short Baseline Neutrino Program
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