PoS - Proceedings of Science
Volume 380 - Particles and Nuclei International Conference 2021 (PANIC2021) - Hadrons in medium - hyperons and mesons in nuclear matter
Preparation of the hypertriton binding energy measurement at MAMI
P. Eckert*, P. Achenbach, M. Aragonès Fontboté, T. Akiyama, M.O. Distler, A. Esser, J. Geratz, M. Hoek, K. Itabashi, M. Kaneta, P. Klag, H. Merkel, M. Mizuno, J. Müller, U. Müller, S. Nagao, S.N. Nakamura, Y.R. Nakamura, K. Okuyama, J. Pochodzalla, C. Sfienti, R. Spreckels, M. Steinen, M. Thiel, K. Uehara, Y. Toyama  on behalf of the A1 Collaborationet al. (click to show)
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Pre-published on: March 14, 2022
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Abstract
A new experiment is being prepared at the Mainz Microtron (MAMI) to determine the $\Lambda$ binding energy of hypertriton. The energy will be measured by the spectroscopy of mono-energetic pions from two-body decays of stopped hyperfragments. During the last decade, it has been demonstrated at MAMI that this technique yields an unprecedented precision. The new experiment makes use of a novel high-luminosity target that takes advantage of the low density of lithium to minimize momentum smearing for the outgoing pions. With a beam energy determination by the novel undulator light interference method an improved calibration of the magnetic spectrometers can be reached to reach the goal of a statistical and systematic error of $\sim$ $20\,\mathrm{keV}$.
DOI: https://doi.org/10.22323/1.380.0201
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