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\(1/2^ + uudd\bar s\) pentaquark and instanton-induced forces

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Abstract.

The mass of the 1/2 + \(uudd\bar s\) pentaquark is calculated within the framework of a semirelativistic effective Hamiltonian approach to QCD with instanton-induced forces, using a diquark picture. This approximation allows a correct treatment of the confinement, assumed here to be a Y-junction. With the [ud] diquark mass fitted on the \(\Lambda\)-baryon, the ground-state pentaquark is found around 2.2 GeV.

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Authors and Affiliations

  1. Service de Physique Générale et de Physique des Particules Élémentaires, Groupe de Physique Nucléaire Théorique, Université de Mons-Hainaut, Place du Parc 20, B-7000, Mons, Belgium

    C. Semay

  2. Laboratoire de Physique Subatomique et de Cosmologie, Avenue des Martyrs 53, F-38026, Grenoble-Cedex, France

    B. Silvestre-Brac

Authors
  1. C. Semay
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  2. B. Silvestre-Brac
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Correspondence to C. Semay.

Additional information

Communicated by V. Vento

Received: 28 April 2004, Revised: 11 May 2004, Published online: 19 October 2004

PACS:

12.39.Pn Potential models - 12.39.Ki Relativistic quark model - 14.20.-c Baryons (including antiparticles)

C. Semay: FNRS Research Associate;

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Semay, C., Silvestre-Brac, B. \(1/2^ + uudd\bar s\) pentaquark and instanton-induced forces. Eur. Phys. J. A 22, 1–3 (2004). https://doi.org/10.1140/epja/i2004-10032-x

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  • DOI: https://doi.org/10.1140/epja/i2004-10032-x

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