Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 10: Search for New Particles -1
T 10.9: Vortrag
Montag, 21. März 2022, 18:15–18:30, T-H23
Searching for ALPs in Light-by-light Scattering in pp Collisions Using AFP Proton Tagging with the ATLAS Detector — Peter Bussey1, Tomas Chobola2, Petr Dostal2, •Hussain Kitagawa3, Patrick Odagiu4, Rafal Staszewski5, André Sopczak2, Gen Tateno6, Junichi Tanaka6, Marek Tasevsky7, and Koji Terashi6 — 1University of Glasgow — 2CTU in Prague — 3Okayama University — 4EPFL Lausanne — 5IFJ PAN Krakow — 6ICEPP Tokyo — 7CAS Prague
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 two components of the AFP detector are positioned symmetrically at approximately 220 m on either side of the interaction point near the beam pipe and are used to measure the kinematics of surviving protons. The high-mass diphoton spectrum is studied for the 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. A blinding strategy is established, and an optimization of the acoplanarity angle is performed. A Functional Decomposition study for the background modeling is applied.