Lambda production in K-p interactions at 32 GeV/c
Creators
- 1. Akademie der Wissenschaften der DDR, Berlin-Zeuthen. Inst. fuer Hochenergiephysik
- 2. Technische Hochschule Aachen (Germany, F.R.). Lehrstuhl fuer Experimentalphysik 1A und 1. Physikalisches Inst.
- 3. European Organization for Nuclear Research, Geneva (Switzerland)
- 4. CEA Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France). Dept. de Physique des Particules Elementaires
- 5. Gosudarstvennyj Komitet po Ispol'zovaniyu Atomnoj Ehnergii SSSR, Serpukhov. Inst. Fiziki Vysokikh Ehnergij
- 6. Oesterreichische Akademie der Wissenschaften, Vienna. Inst. fuer Hochenergiephysik
Description
Lambda production is studied in K-p interactions at 32 GeV/c. The total lambda cross section is 2.31 +- 0.03 mb. Using the measured lambdaγ combinations we find that (31 +- 4)% of all lambda's are produced via the Σ 0 → lambdaγ decay. About 60% of the lambda's are associated with either aNantiN or a KantiK pair; about 40% of the lambda's are produced through the hypercharge annihilation reaction K-p → lambda + π's. The two peak-structure of the invariant x distribution can be related to fragmentation processes. The lambda is found to be unpolarized in the target fragmentation region, whereas a transverse polarization is observed for forward produced lambda's. As a function of psub(perpendicular), a polarization effect is measured at medium psub(perpendicular). (author)
Availability note (English)
MF available from INIS under the Report Number.
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Additional details
Publishing Information
- Imprint Pagination
- 29 p.
- Report number
- PHE--80-2
INIS
- Country of Publication
- German Democratic Republic
- Country of Input or Organization
- German Democratic Republic
- INIS RN
- 12606471
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- DIFFERENTIAL CROSS SECTIONS; ELECTROMAGNETIC PARTICLE DECAY; EXPERIMENTAL DATA; KAON MINUS-PROTON INTERACTIONS; LAMBDA PARTICLES; PARTICLE PRODUCTION; SIGMA NEUTRAL; TOTAL CROSS SECTIONS; TRANSVERSE MOMENTUM
- Descriptors DEC
- BARYONS; CROSS SECTIONS; DATA; DECAY; ELEMENTARY PARTICLES; FERMIONS; HADRON-HADRON INTERACTIONS; HADRONS; HYPERONS; INFORMATION; INTERACTIONS; KAON-NUCLEON INTERACTIONS; KAON-PROTON INTERACTIONS; LINEAR MOMENTUM; MESON-BARYON INTERACTIONS; MESON-NUCLEON INTERACTIONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE INTERACTIONS; SIGMA PARTICLES; STRANGE PARTICLES
Optional Information
- Notes
- France-Soviet Union and CERN-Soviet Union collaborations.