Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 12: Search for New Particles I

T 12.7: Vortrag

Montag, 15. März 2021, 17:35–17:50, Tl

Searching for ALPs in light-by-light scattering in pp collisions using AFP proton tagging with the ATLAS detector — Peter Bussey¹, •Tomaš Chobola², Petr Dostál², Hussain Kitagawa³, Artem Kravchenko², Patrick Odagiu⁴, André Sopczak², Junichi Tanaka⁵, Gen Tateno⁵, and Koji Terashi⁵ — ¹University of Glasgow — ²CTU in Prague — ³Okayama University — ⁴EPF Lausanne — ⁵ICEPP University of Tokyo

The search for an Axion-Like-Particle (ALP) is being performed using about 20 fb⁻¹ data recorded with the ATLAS experiment and the ATLAS Forward Proton (AFP) detector in 2017. The AFP detector is positioned symmetrically at approximately 220 m away from the interaction point near the beam pipe and is used to measure the kinematics of surviving protons. The high-mass diphoton spectrum is studied to search for an ALP mediated by light-by-light scattering. The investigated mass range is between 0.1 TeV and 2 TeV ALP with a typical coupling g = 1 TeV⁻¹. Data containing photon information and AFP containers are prepared. A blinding strategy is established, along with the next steps in this search.