sigma. Hypernuclei

Journal Article · Fri Apr 01 04:00:00 EST 1983 · Ann. Phys. (N.Y.); (United States)

DOI:https://doi.org/10.1016/0003-4916(83)90036-2· OSTI ID:5981897

Dover, C B; Gal, A

We consider the possibility of forming doubly strange ..xi.. hypernuclei via the (K/sup -/, K) reactions on various nuclear targets. Because of the high momentum transfer involved, even at 0/sup 0/, the formation of high spin states is strongly favored. The available experimental information on the elementary processes K/sup -/p ..-->.. K/sup +/..xi../sup -/ or K/sup 0/..xi../sup 0/ is reviewed, leading to the determination of an optimum incident K/sup -/ momentum of about 1.9 GeV/c for the forward formation of discrete ..xi.. hypernuclear states. The cross section for the process ..xi..N ..-->.. ..lambda lambda.., responsible for the damping width of ..xi.. states in nuclei, is estimated theoretically and the very limited experimental data are also reviewed. The resulting ..xi.. hypernuclear widths are of order 5 MeV. Emulsion data which have been interpreted as due to the existence of ..lambda lambda.. and ..xi../sup -/ hypernuclei are discussed and used to obtain an approximate ..xi.. nuclear well-depth of 21--24 MeV. For this range of values, spectra of single particle ..xi../sup -/ states are obtained, and calculated angular distributions for the formation of simple ..xi../sup -/ particle--proton hole states in /sup 4/He, /sup 12/C and /sup 28/Si targets are presented. The peak 0/sup 0/ lab cross section at P/sub lab/ = 1.9 GeV/c for such states ranges from tens of nb/sr to about 1 ..mu..b/sr. We briefly mention other methods for forming ..xi.. hypernuclei, such as the three body reaction K/sup -/ ..-->.. K..pi xi.. (K/sup em-dash/p ..-->.. K/sup +/K/sup 0/..cap omega../sup -/ for ..cap omega../sup -/ hypernuclei).

• Research Organization: Brookhaven National Laboratory, Upton, New York 11973
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5981897
• Journal Information: Ann. Phys. (N.Y.); (United States), Journal Name: Ann. Phys. (N.Y.); (United States) Vol. 146:2; ISSN APNYA
• Country of Publication: United States
• Language: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALKALINE EARTH ISOTOPES
ALUMINIUM 28
ALUMINIUM ISOTOPES
ANGULAR DISTRIBUTION
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BINDING ENERGY
BORON 11
BORON ISOTOPES
BOSONS
CARBON 13
CARBON 15
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DISTRIBUTION
DOCUMENT TYPES
ELEMENTARY PARTICLES
ENERGY
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
GEV RANGE
GEV RANGE 01-10
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
HADRONS
HELIUM 8
HELIUM ISOTOPES
HIGH SPIN STATES
HYPERNUCLEI
HYPERONS
INTERACTIONS
ISOTOPES
KAON MINUS REACTIONS
KAON MINUS-PROTON INTERACTIONS
KAON REACTIONS
KAON-NUCLEON INTERACTIONS
KAON-PROTON INTERACTIONS
KAONS
KAONS NEUTRAL
KAONS PLUS
LAMBDA PARTICLES
LEVEL WIDTHS
LIGHT NUCLEI
MAGNESIUM 29
MAGNESIUM 30
MAGNESIUM ISOTOPES
MESON REACTIONS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
MINUTES LIVING RADIOISOTOPES
MOMENTUM TRANSFER
NUCLEAR EMULSIONS
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
OXYGEN 17
OXYGEN ISOTOPES
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PRODUCTION
PSEUDOSCALAR MESONS
RADIOISOTOPES
REVIEWS
SECONDS LIVING RADIOISOTOPES
SIGMA MINUS
SIGMA NEUTRAL
SIGMA PARTICLES
STABLE ISOTOPES
STRANGE PARTICLES
STRANGENESS-EXCHANGE REACTIONS