Photoproduction of the Θ<SUP>+</SUP> and its vector and axial-vector structure

K. Goeke; T. Ledwig; S.i. Nam

doi:10.1088/1674-1137/33/12/038

Chinese Physics C> 2009, Vol. 33> Issue(12) : 1279-1284 DOI: 10.1088/1674-1137/33/12/038

Photoproduction of the Θ⁺ and its vector and axial-vector structure

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Abstract：
We present recent investigations on the vector and axial-vector transitions of the baryon antidecuplet within the framework of the self-consistent SU(3) chiral quark-soliton model, taking into account the 1/N_c rotational and linear m_s corrections. The main contribution to the electric-like transition form factor comes from the wave-function corrections. This is a consequence of the generalized Ademollo-Gatto theorem. It is also found that in general the leading-order contributions are almost canceled by the rotational 1/N_c corrections. The results are summarized as follows: the vector and tensor $\rm K^*NΘ coupling constants, g_K*NΘ= 0.74—0.87 and f_K*NΘ= 0.53—1.16, respectively, and Γ_Θ→KN=0.71 MeV, based on the result of the KNΘ coupling constant g_KnΘ=0.83. We also show the differential cross sections and beam asymmetries, based on the present results. We also discuss the connection of present results with the original work by Diakonov, Petrov, and Polyakov.

References

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K. Goeke, T. Ledwig and S.i. Nam. Photoproduction of the Θ⁺ and its vector and axial-vector structure[J]. Chinese Physics C, 2009, 33(12): 1279-1284. doi: 10.1088/1674-1137/33/12/038

K. Goeke, T. Ledwig and S.i. Nam. Photoproduction of the Θ⁺ and its vector and axial-vector structure[J]. Chinese Physics C, 2009, 33(12): 1279-1284. doi: 10.1088/1674-1137/33/12/038 shu

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Received: 2009-08-07
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Photoproduction of the Θ⁺ and its vector and axial-vector structure

Received Date: 2009-08-07

Accepted Date: 1900-01-01

Available Online: 2009-12-05

Abstract:

We present recent investigations on the vector and axial-vector transitions of the baryon antidecuplet within the framework of the self-consistent SU(3) chiral quark-soliton model, taking into account the 1/N_c rotational and linear m_s corrections. The main contribution to the electric-like transition form factor comes from the wave-function corrections. This is a consequence of the generalized Ademollo-Gatto theorem. It is also found that in general the leading-order contributions are almost canceled by the rotational 1/N_c corrections. The results are summarized as follows: the vector and tensor $\rm K^*NΘ coupling constants, g_K*NΘ= 0.74—0.87 and f_K*NΘ= 0.53—1.16, respectively, and Γ_Θ→KN=0.71 MeV, based on the result of the KNΘ coupling constant g_KnΘ=0.83. We also show the differential cross sections and beam asymmetries, based on the present results. We also discuss the connection of present results with the original work by Diakonov, Petrov, and Polyakov.

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Photoproduction of the Θ⁺ and its vector and axial-vector structure

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Photoproduction of the Θ⁺ and its vector and axial-vector structure

Photoproduction of the Θ⁺ and its vector and axial-vector structure