https://doi.org/10.1140/epja/s10050-021-00649-8
Regular Article - Experimental Physics
Revisiting the former nuclear emulsion data for hypertriton
1
Institute of Modern Physics, Chinese Academy of Sciences, 509 Nanchang Road, 730000, Lanzhou, Gansu Province, China
2
High Energy Nuclear Physics Laboratory, Cluster for Pioneering Research, RIKEN, 2-1 Hirosawa, Wako, 351-0198, Saitama, Japan
3
School of Nuclear Science and Technology, University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, 100049, Beijing, China
4
Graduate School of Engineering, Gifu University, 1-1 Yanagido, 501-1193, Gifu, Japan
5
GSI Helmholtz Centre for Heavy Ion Research, Planckstrasse 1, 64291, Darmstadt, Germany
6
School of Nuclear Science and Technology, Lanzhou University, 222 South Tianshui Road, 730000, Lanzhou, Gansu Province, China
7
Department of physics, Tohoku University, Aramaki, Aoba-ku, 980-8578, Sendai, Japan
Received:
17
September
2021
Accepted:
27
November
2021
Published online:
12
December
2021
We revisit previous measurements for the hypertriton binding energy with nuclear emulsion which were published in 1968 and 1973. Using Monte Carlo simulations, the systematic error of the hypertriton binding energy in emulsion measurements has been estimated to be approximately 28 keV. We corroborate the recent works that re-evaluate the hypertriton binding energy by using the former emulsion measurements in the present work, and the ambiguities and difficulties of the reevaluation are observed. Considering the need of new precise measurements with a well-controlled systematic error, we introduce a new approach by analyzing the existing nuclear emulsion data from the J-PARC E07 experiment, from which the binding energy of hypertriton could be determined, with both statistical and systematic errors, to be approximately 30 keV with 400 events.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021
