EPJ

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EPJ A - Hadrons and Nuclei
Hadrons and Nuclei


Eur. Phys. J. A 14, 265-269 (2002)
DOI: 10.1140/epja/i2001-10211-3

Short Note

Chiral-invariant phase space model

I. Masses of hadrons
M.V. Kossov

ITEP, Moscow, Russia and CERN, 1211 Geneva, Switzerland

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(Received: 12 December 2001 / Revised version: 16 May 2002 Communicated by V. Vento)

Abstract
The masses of the $SU(3)\times SU(6)$ hadrons are calculated in the chiral-invariant phase space (CHIPS) model as a sum of the mean energies of the quarks at a constant temperature $T_{\rm c}$ with the color-magnetic splitting and the color-electric shift. The masses of hadrons are parametrized by four constants: $T_{\rm c}$, ms, $E_{\rm CE}$ and $A_{\rm CM}$. With the same number of parameters the CHIPS model fits the masses of hadrons better than the classic bag model. The small mass of the d-quark ( $m_d=2.7\un{MeV}$) is used to prove that the isotopic shifts of hadrons can be explained by the mass difference between the d- and u-quarks. The dibaryon mass is estimated in CHIPS to be $200\un{MeV}$ higher than in the bag model. The prediction for the mass of the $\alpha^*$ cluster is about the same in both models. It is close to $4\cdot m_\Delta$.

PACS
12.39.Ki - Relativistic quark model.
12.40.Yx - Hadron mass models and calculations.

© Società Italiana di Fisica, Springer-Verlag 2002

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