# Unitary coupled channel study of the {lambda}(1520) resonance

## Abstract

We study the {lambda}(1520) resonance in a coupled channel approach involving the {pi}{sigma}(1385), K{xi}(1530), K-barN and {pi}{sigma} channels. Implementing unitarity in coupled channels, we make an analysis of the relative importance of the different mechanisms which contribute to the dynamical structure of this resonance. From experimental information on some partial wave amplitudes and constraints imposed by unitarity, we get a comprehensive description of the amplitudes and hence the couplings to the different channels. We test these amplitudes in different reactions like K-p {yields} {lambda}{pi}{pi}, {gamma}p {yields} K+K-p, {gamma}p {yields} K+{pi}0{pi}0{lambda} and {pi}-p {yields} K0K-p and find a fair agreement with the experimental data.

- Authors:

- Departamento de Fisica Teorica, Institutos de Investigacion de Paterna, Aptdo. 22085, 46071 Valencia (Spain)
- (Spain)

- Publication Date:

- OSTI Identifier:
- 20798077

- Resource Type:
- Journal Article

- Resource Relation:
- Journal Name: AIP Conference Proceedings; Journal Volume: 814; Journal Issue: 1; Conference: 11. international conference on hadron spectroscopy, Rio de Janeiro (Brazil), 21-26 Aug 2005; Other Information: DOI: 10.1063/1.2176490; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AMPLITUDES; COUPLED CHANNEL THEORY; KAON-HYPERON INTERACTIONS; KAONS; LAMBDA-1520 BARYONS; NUCLEONS; PARTIAL WAVES; PARTICLE PROPERTIES; PION-HYPERON INTERACTIONS; RESONANCE PARTICLES; SIGMA BARYONS; UNITARITY; XI BARYONS

### Citation Formats

```
Roca, L., Magas, V. K., Oset, E., Sarkar, Sourav, and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigacion de Paterna, Aptdo. 22085, 46071 Valencia.
```*Unitary coupled channel study of the {lambda}(1520) resonance*. United States: N. p., 2006.
Web. doi:10.1063/1.2176490.

```
Roca, L., Magas, V. K., Oset, E., Sarkar, Sourav, & IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigacion de Paterna, Aptdo. 22085, 46071 Valencia.
```*Unitary coupled channel study of the {lambda}(1520) resonance*. United States. doi:10.1063/1.2176490.

```
Roca, L., Magas, V. K., Oset, E., Sarkar, Sourav, and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigacion de Paterna, Aptdo. 22085, 46071 Valencia. Sat .
"Unitary coupled channel study of the {lambda}(1520) resonance". United States.
doi:10.1063/1.2176490.
```

```
@article{osti_20798077,
```

title = {Unitary coupled channel study of the {lambda}(1520) resonance},

author = {Roca, L. and Magas, V. K. and Oset, E. and Sarkar, Sourav and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigacion de Paterna, Aptdo. 22085, 46071 Valencia},

abstractNote = {We study the {lambda}(1520) resonance in a coupled channel approach involving the {pi}{sigma}(1385), K{xi}(1530), K-barN and {pi}{sigma} channels. Implementing unitarity in coupled channels, we make an analysis of the relative importance of the different mechanisms which contribute to the dynamical structure of this resonance. From experimental information on some partial wave amplitudes and constraints imposed by unitarity, we get a comprehensive description of the amplitudes and hence the couplings to the different channels. We test these amplitudes in different reactions like K-p {yields} {lambda}{pi}{pi}, {gamma}p {yields} K+K-p, {gamma}p {yields} K+{pi}0{pi}0{lambda} and {pi}-p {yields} K0K-p and find a fair agreement with the experimental data.},

doi = {10.1063/1.2176490},

journal = {AIP Conference Proceedings},

number = 1,

volume = 814,

place = {United States},

year = {Sat Feb 11 00:00:00 EST 2006},

month = {Sat Feb 11 00:00:00 EST 2006}

}