Θ<SUP>+</SUP> with Double Y-Ansatz Confining Potential

ZHAO Hong-Ming; ZENG Zhuo-Quan; SHENG Peng-Nian; DING Yi-Bing; LI Xue-Qian

Chinese Physics C> 2006, Vol. 30> Issue(5) : 405-411

Θ⁺ with Double Y-Ansatz Confining Potential

Institute of High Energy Physics, CAS, Beijing 100049, China2 College of Physical Sciences, Graduate University of Chinese Academy of Sciences, Beijing 100049, China3 Department of Physics, Nankai University, Tianjin 300071, China4 Institute of Theoretical Physics, CAS, Beijing 100080, China5 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China

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Abstract：
The mass of Θ⁺ in the qq-q-qq configuration is calculated by using a potential composed by a Coulomb potential originated from the One Gluon Exchange (OGE) and a double Y-mode confining potential extracted from the flux tube model. It is shown that the mass of the negative parity state of Θ⁺ is 1.935GeV, which is more than 300MeV higher than the reported experimental value of 1.540GeV. While the positive parity state of Θ⁺ has a mass of 2.082GeV, which is consistent with the result from the Lattice Quantum Chromodynamics (LQCD) calculation. With these masses, the reported Θ⁺(1540) cannot be confirmed as a pentaquark state.

References

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ZHAO Hong-Ming, ZENG Zhuo-Quan, SHENG Peng-Nian, DING Yi-Bing and LI Xue-Qian. Θ⁺ with Double Y-Ansatz Confining Potential[J]. Chinese Physics C, 2006, 30(5): 405-411.

ZHAO Hong-Ming, ZENG Zhuo-Quan, SHENG Peng-Nian, DING Yi-Bing and LI Xue-Qian. Θ⁺ with Double Y-Ansatz Confining Potential[J]. Chinese Physics C, 2006, 30(5): 405-411. shu

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Received: 2005-11-21
Revised: 2005-12-22

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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

Θ⁺ with Double Y-Ansatz Confining Potential

Corresponding author: ZHAO Hong-Ming,

Institute of High Energy Physics, CAS, Beijing 100049, China2 College of Physical Sciences, Graduate University of Chinese Academy of Sciences, Beijing 100049, China3 Department of Physics, Nankai University, Tianjin 300071, China4 Institute of Theoretical Physics, CAS, Beijing 100080, China5 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China

Received Date: 2005-11-21

Accepted Date: 2005-12-22

Available Online: 2006-05-05

Abstract: The mass of Θ⁺ in the qq-q-qq configuration is calculated by using a potential composed by a Coulomb potential originated from the One Gluon Exchange (OGE) and a double Y-mode confining potential extracted from the flux tube model. It is shown that the mass of the negative parity state of Θ⁺ is 1.935GeV, which is more than 300MeV higher than the reported experimental value of 1.540GeV. While the positive parity state of Θ⁺ has a mass of 2.082GeV, which is consistent with the result from the Lattice Quantum Chromodynamics (LQCD) calculation. With these masses, the reported Θ⁺(1540) cannot be confirmed as a pentaquark state.

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Θ⁺ with Double Y-Ansatz Confining Potential

Θ⁺ with Double Y-Ansatz Confining Potential