Jun 13 – 17, 2011
Europe/Berlin timezone
Proceedings are now available online at <a href="http://www.slac.stanford.edu/econf/C110613/">eConf</a>

Properties of charm baryons in quark-diquark model

Jun 14, 2011, 6:20 PM
1h 10m
Millerzimmer (Künstlerhaus)



poster Poster Session Poster Session


Mr Ajay Majethiya (Department of Physics, Sardar Patel University,)


Study of the heavy flavour hadrons containing either a charm quark or a beauty quark has become a subject of recent interest due to the observations reported by the experimental groups at Belle, BABAR, DELPHI, CLEO, CDF etc;. Most of the new states observed in these experimental facilities are within the heavy flavour sector with one or more heavy flavour quark composition. In this paper, we present our study on the properties of single charmed baryons based on the quarkdiquark structure. The inter-quark potential is assumed as two body colour coulomb plus power potential with exponent, ν lying between 0.1 to 2.0. We find a strong correlation between the choice of the heavy quark mass parameter (mc), strong coupling constant (αs) and the potential exponent, (v) for getting the experimental mass spilt of ΔMΣc * −Σc= 64 MeV. The resultant spectroscopic parameters are used for computing magnetic moments, the electromagnetic radiative decay, strong hadronic decay and semileptonic decay widths of Σc, Λc systems. Numerical methods are employed for getting the spectra and the corresponding state vectors which are important inputs to study their decay properties. Our results for the choice of ν=1.0 and αs= 0.25 led to the fixing of charm mass parameter, mc= 1.5 GeV to have the experimental ΔMΣc * −Σc= 64 MeV [1]. With the same model parameters, we have computed the mass of Λc as MΛc = 2.293 GeV, as against the PDG2010 value of 2.286 GeV, the magnetic moment, μΛc = 0.395μN, as against the value of 0.380μN predicted in a relativistic quark model [2]. Our results for the transition decay width, ΓΣc→Λc γ = 72.77 MeV is close to 87.00 MeV predicted by Heavy Quark Symmetry [3] and the semileptonic width, ΓΛc→Λlνl = 0.83∗1011 S-1 is in good agreement with the PDG value of ΓΛc→Λlνl = 1.0∗1011 S-1 [1]. The overall agreement obtained in the present study indicates the success of the present model and the choice of the interquark potential for the description of the charm baryons. References: [1] K. Nakamura et al, PDG, J. Phy. G: Nucl Part. Phy. 37, 075021 (2010). [2] Amand Faessler et al, Phys. Rev. D 73, 094013 (2006). [3] S. Tawfiq et al, Phys. Rev.D 63, 034005 (2001).

Primary author

Mr Ajay Majethiya (Department of Physics, Sardar Patel University,)


Mr Kaushal Thakkar (Department of Physics, Sardar Patel University,) Prof. Vinodkumar Pothodi Chackara (Department of Physics, Sardar Patel University,)

Presentation materials