Photoproduction of a {Lambda} on {sup 12}C

Journal Article · Tue Sep 01 04:00:00 EDT 1998 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.58.1551· OSTI ID:641682

Lee, T H; Ma, Z; Toki, H ^[1]; Lee, T H ^[2]; Ma, Z ^[3]; Saghai, B ^[4]

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1. Research Center for Nuclear Physics, Osaka University, Osaka (Japan)
2. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
3. China Institute of Atomic Energy, Beijing 102413, Peoples Republic of (China)
4. Service de Physique Nucleaire, CEA/Saclay, F-91191 Gif-sur-Yvette (France)

The photoproduction of a {Lambda} on {sup 12}C is investigated by using the recently developed Saclay-Lyon amplitudes for the {gamma}p{r_arrow}K{sup +}{Lambda} reaction and the single-particle wave functions from a relativistic mean-field model of nuclei and {Lambda} hypernuclei. With the nuclear transition matrix elements taken from a shell-model calculation, the predicted bound-{Lambda} production cross sections are close to the {sup 12}C({gamma},K{sup +}){sub {Lambda}}{sup 12}B reaction data. The dependence of the predictions on the model of {gamma}p{r_arrow}K{sup +}{Lambda} amplitudes has been investigated. The cross sections of quasifree processes leading to an unbound {Lambda} are also calculated in a simple three-body model. The predicted cross sections of the inclusive {sup 12}C({gamma},K{sup +}) reaction reproduce the energy dependence of the data up to 1.1 GeV, but overestimate the magnitude by a factor of about 2.2. We discuss the extent to which this overestimation can be understood in terms of medium effects on the propagation of the outgoing K{sup +} and {Lambda}. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 641682
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 3 Vol. 58; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CARBON 12 TARGET
HYPERNUCLEI
KAONS PLUS
PARTICLE PRODUCTION
PHOTONUCLEAR REACTIONS
PHOTOPRODUCTION
QUASI-FREE REACTIONS
SHELL MODELS
WAVE FUNCTIONS