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Magnetic moments of the low-lying \(\tfrac{1} {2}^ -\) octet baryon resonances

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Abstract.

The magnetic moments of the negative-parity octet resonances with spin \(\tfrac{1} {2}\) : N *(1535), N *(1650), Σ * (1620), and Ξ * (1690) have been calculated within the framework of the chiral constituent quark model. In this approach, the presence of the polarized \(q\bar q\) pairs (or the meson cloud, in other words) is considered by using the Lagrangian for Goldstone boson emission from the constituent quarks. Further, the explicit contributions coming from the spin and orbital angular momentum, including the effects of the configurations mixing between the states with different spins, are obtained. The motivation for these calculations comes from the recent interest in the experimental measurement of the magnetic moment of the S 11 (1535) resonance and of similar calculations being done within lattice quantum chromodynamics approaches. Our results can be compared with those expected to come from these sources.

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Authors and Affiliations

  1. Department of Physics, Dr. B.R. Ambedkar National Institute of Technology, 144011, Jalandhar, India

    Neetika Sharma & Harleen Dahiya

  2. Instituto de Física, Universidade de São Paulo, 66318, São Paulo, Brazil

    A. Martínez Torres & K. P. Khemchandani

Authors
  1. Neetika Sharma
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  2. A. Martínez Torres
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  3. K. P. Khemchandani
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  4. Harleen Dahiya
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Correspondence to Harleen Dahiya.

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Communicated by Bo-Qiang Ma

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Sharma, N., Martínez Torres, A., Khemchandani, K.P. et al. Magnetic moments of the low-lying \(\tfrac{1} {2}^ -\) octet baryon resonances. Eur. Phys. J. A 49, 11 (2013). https://doi.org/10.1140/epja/i2013-13011-2

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  • DOI: https://doi.org/10.1140/epja/i2013-13011-2

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