What can we learn about baryon-baryon interaction from hypernuclei {sub {lambda}}{sup 6}H and {sub {lambda}}{sup 8}H?

Journal Article · Sat Sep 15 00:00:00 EDT 2007 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778807090190· OSTI ID:21077620

Gmuca, S ^[1]

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1. Slovak Academy of Sciences, Institute of Physics (Slovakia)

At the LHE JINR, an original approach to hypernuclear experiments was elaborated to produce relativistic hypernuclei. The production cross sections and lifetimes, {tau}, of {sub {lambda}}{sup 3}H and {sub {lambda}}{sup 4}H were measured successfully. The results of recent experiments on {sup 5}H and {sup 7}H nuclei suggest that the hypernucleus {sub {lambda}}{sup 6}H might be stable and that this may be the case even for {sub {lambda}}{sup 8}H. The unique quality of the spectrometer SPHERE may be used to identify unambiguously the isotopes of hyperhydrogen-through their pionic decay {sub {lambda}}{sup A}H {sup {yields}} {pi}{sup -} + {sup A}He-including the new hypernuclei {sub {lambda}}{sup 6}H and {sub {lambda}}{sup 8}H with extreme values of N/Z of 4 and 6, respectively. The confirmation of the very existence of these neutron-rich hypernuclei would be a strong motivation to search for their spectra in strangeness and double-charge-exchange reactions (K{sub stop}{sup -}, {pi}{sup +}) at FINUDA or ({pi}{sup -}, K{sup +}) at J-PARC. It is very probable that, similarly as in {sub {lambda}}{sup 4}H, there is a low-lying state 1{sup +} also in {sub {lambda}}{sup 6}H and {sub {lambda}}{sup 8}H. If their electromagnetic width (M1) is small enough, we could see two different values of {tau} for {sub {lambda}}{sup 6}H and/or {sub {lambda}}{sup 8}H. We investigate the spacings of the 1{sup +} and 0{sup +} states of {sub {lambda}}{sup 4}H, {sub {lambda}}{sup 6}H, and {sub {lambda}}{sup 8}H. The understanding of the structure of isospin asymmetric systems plays a key role in the description of systems as diverse as neutron-rich nuclei and neutron matter.

• OSTI ID: 21077620
• Journal Information: Physics of Atomic Nuclei, Vol. 70, Issue 9; Other Information: DOI: 10.1134/S1063778807090190; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Ltd; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASYMMETRY
BARYON-BARYON INTERACTIONS
CHARGE-EXCHANGE REACTIONS
CROSS SECTIONS
HYDROGEN 5
HYDROGEN 6
HYDROGEN 7
HYPERNUCLEI
ISOSPIN
JINR
LIFETIME
NEUTRON-RICH ISOTOPES
NEUTRONS
NUCLEAR DECAY
NUCLEAR MATTER
PIONS MINUS
PIONS PLUS
RELATIVISTIC RANGE
SPECTROMETERS
STRANGENESS