Collider Cross Talk

FASER: first results on neutrino detection

by Felix Kling (DESY), John Kenneth Anders (CERN)

4/2-011 - TH common room (CERN)

4/2-011 - TH common room


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The LHC is not only our primary tool to expand our understanding of nature at the energy frontier, but it is also the source of the most energetic human-made neutrinos. Indeed, the LHC produces a strongly collimated beam of TeV-energy neutrinos of all three flavours in the far-forward direction. The FASER experiment was built to exploit this opportunity by studying the production and interactions of these neutrinos. The experiment recently reported the first direct observation of neutrinos at the LHC. In this talk, we will present the FASER experiment and its first results, discuss the underlying physics, and outline the prospects on potential of collider neutrino measurements.


Felix Kling is research fellow at the DESY in the field of theoretical high energy physics. In 2012, Felix received his Master degree at the University of Heidelberg under the supervision of Tilman Plehn. For graduate school, Felix moved to the University of Arizona where he worked on the phenomenology of extended Higgs with Shufang Su. Before graduating in 2016, Felix spent his last year of his PhD at Fermilab through the Fermilab Graduate Student Research Program in Theoretical Physics. From 2016-2019, Felix was postdoctoral researcher at the University of California in Irvine. During this time, he developed new machine-learning based analysis techniques for LHC analysis, and proposed the FASER experiment. From 2019-2021 he was postdoctoral researcher at SLAC. During this time, he was involved in the proposal for the Forward Physics Facility.

John Anders is a Research Fellow at CERN, working on both the FASER and ATLAS experiments. His primarily scientific interests focus on searching for BSM physics, including SUSY, Dark Matter and Leptoquarks. After performing multiple BSM searches with the ATLAS detector during his PhD and post-doc, he is now interested in using the unique placement of the FASER experiment to search for long-lived particles inspired by a selection of BSM models.