SMuK 2021 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 1: Invited Talks - I

HK 1.2: Hauptvortrag

Montag, 30. August 2021, 11:30–12:00, H1

Highlights from the COMPASS Experiment and the AMBER Proposal — •Boris Grube — Physik-Department E18, Technische Universität München

The COMPASS experiment, which is the largest multi-purpose fixed-target spectrometer setup at the CERN Super Proton Synchrotron, studies the structure and spectrum of hadrons by scattering high-energy beams of hadrons and polarized muons off various targets. The broad physics program aims at a deeper understanding of the strong interaction, which is described by quantum chromodynamics (QCD). The studied processes include soft reactions of hadrons to test the breaking of the chiral symmetry of QCD, production and decay of meson resonances to perform detailed studies of the excitation spectrum of light-quark mesons, and scattering of high-energy muons and pions off nucleons to unravel the role of spin and internal dynamics in the quark-gluon structure of the nucleon. We will present highlights from recent analyses.

Based on the very successful running of COMPASS, the new AMBER experiment was proposed recently. The physics program includes a wide variety of measurements addressing fundamental questions of QCD. We will discuss the first part of the proposed program, which is intended to start 2022 and aims, among other things, at a measurement of the charge radius of the proton via elastic scattering of high-energy muons off target protons in order to shed more light on the proton-radius puzzle.