momentum transfer. Eur. Phys. J. A 54, 208 (2018). DOI: 10.1140/epja/i2018-12611-6 https://link.springer.com/article/10.1140/epja/i2018-12611-6 Berger, N., Denig, A., Maas, F., & Sfienti, C., Laboratory Portrait: [...] data will probe the existence of new particles down to microscopic length scales of a zeptometer (10-21 m)”, explains Prof. Maas. “Dedicated theoretical developments will also be performed in Mainz, allowing