ProHyPro · Production and decay of Hypernuclei by using an intense heavy-ion beam incidenting on a Proton target
Horizon 2020 — Marie Skłodowska-Curie Actions
- Duration
- 2016-06-01 → 2018-05-31
- EU contribution
- €173,076
- Participants
- 1
- Scheme
- MSCA-IF-EF-ST
Lines connect the coordinator with its partners.
Results in brief
Production and decay of Hypernuclei by using an intense heavy-ion beam incidenting on a Proton target
Hyperons are expected to be an important building block of high-density matter such as neutron stars. However, the hyperon-nucleon (YN) and hyperon-hyperon (YY) interactions are rarely known because the short lifetime of hyperons (hundreds of ps) making it extremely difficult to perform scattering or capture experiments with hyperon beams. Hypernuclei, which contains at least one hyperon in addition to the normal protons and neutrons, provide an alternative and unique ground to study the YN and YY interactions. The study of hypernuclei sheds new light on the world of traditional nuclei by revealing new symmetries and new phenomena produced by the additional strangeness dimension. Hyperons, at variance with nucleons, are free from Pauli blocking and play a glue-like role if embodied in a nucleus. The measured binding energies and energy gap between the spin doublet give precise information on the YN in medium interaction. Study of YY interaction is expected by measuring the fine structure of double-hypernuclei. Furthermore, the first excited state of the lambda particle is 70 MeV, much less than the lowest excitation of the nucleons around 300 MeV, leading to stronger three-body force effects. In astrophysics, the presence of hyperons could either soften or stiffen the equation of state (EOS) of high-density nuclear matter depending on the detailed properties of the YY interaction and the YNN three-body interaction. In the past decades, (K-, pi-), (pi+, K+) and (e, e’K+) reactions has been widely used to produce hypernuclei in the laboratories. In these reactions, stable targets are used, and therefore most of the studied hypernuclei are limited to on/near the beta-stability line. New techniques aiming to produce exotic hypernuclei (neutron-rich or proton-rich) are ongoing which is important to obtain knowledge of the YNN three-body interaction and the density dependence of the YN interaction. This project (ProHyPro) aims at investigating the production and decay of hypernuclei by using an intense heavy-ion beam interacting with a proton target.
Data: CORDIS, © European Union
Project objective
A new hypernuclei program based on the exclusive measurement of (p, ΛK) reactions in inverse kinematics is proposed. The program is to be held at the heavy-ion beam facility GSI, Germany. GSI is the only facility worldwide where this measurement can be performed. It is considered as a first step towards a world-unique program dedicated to the population and spectroscopy of exotic hypernuclei at the future FAIR facility.In ProHyPro, it is proposed to build a prototype of an innovative setup based on a kaon calorimeter and a thick liquid hydrogen target to be inserted inside the R3B setup at GSI. As a proof of concept, we propose to perform the first invariant mass spectroscopy of hyper-16O tagging with K+ mesons, from which we can determine the binding energy and lifetime of hyper-16O with better resolution.During the period of the ProHyPro project, the Researcher will take an active part in an already approved hypernuclei experiment (spokesperson: T. Saito) at the Fragment Separator (FRS) at GSI and the first R3B campaign to be scheduled from 2017 to the beginning of 2018.The project and the Researcher are hosted by CEA (supervisor: A. Obertelli) in partnership with GSI (supervisor: T. Saito).
Original text from CORDIS.
Participants
- COMMISSARIAT A L ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · ParisCoordinatorFrance
Links
Data: CORDIS, © European Union