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Extraction of the pion-nucleon sigma-term from the spectrum of exotic baryons

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Abstract.

The pion-nucleon sigma-term is extracted on the basis of the soliton picture of the nucleon from the mass spectrum of usual and the recently observed exotic baryons, assuming that they have positive parity. The value found is consistent with that inferred by means of conventional methods from pion-nucleon scattering data. The study can also be considered as a phenomenological consistency check of the soliton picture of baryons.

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Authors and Affiliations

  1. Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780 , Bochum, Germany

    P. Schweitzer

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  1. P. Schweitzer
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Correspondence to P. Schweitzer.

Additional information

Communicated by V. Vento

Received: 6 February 2004, Revised: 3 May 2004, Published online: 12 October 2004

PACS:

12.39.Ki Relativistic quark model - 12.38.Lg Other nonperturbative calculations - 14.20.-c Baryons (including antiparticles)

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Schweitzer, P. Extraction of the pion-nucleon sigma-term from the spectrum of exotic baryons. Eur. Phys. J. A 22, 89–95 (2004). https://doi.org/10.1140/epja/i2004-10027-7

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