Speaker
Description
Hard exclusive meson production and deeply virtual Compton scattering are common processes to constrain generalised parton distributions. The measurement of exclusive reactions, notably the exclusive $\pi^0$ production, were conducted at COMPASS in 2016 and 2017 using the 160 GeV/$c$ muon beam scattering off a 2.5~m long liquid hydrogen target equipped with time-of-flight detector to record the recoiling target proton.
We will report on the preliminary results on exclusive $\pi^0$ production cross-section from 2016 data dependent on the squared four-momentum transfer $|t|$ and on the azimuthal angle $\phi$ between the scattering plane and the $\pi^0$ production plane. The results will provide a further input to phenomenological models for constraining flavour dependent generalised parton distributions, in particular chiral-odd ("transversity") ones.
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