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Chinese Physics C> 2006, Vol. 30> Issue(10) : 936-943 

Study on Strong Decays of DsJ(2632)

  •  Department of Physics, Nankai University, Tianjin 300071, China2 Department of Physics, Graduate University of Chinese Academy of Sciences, Beijing 100049, China3 Institute of Low Energy Nuclear Physics, Beijing Normal University, Beijing 100875, China4 Institute of Modern Physics, Zhejiang University, Hangzhou 310027, China5 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China6 Department of Physics, Harbin Institute of Technology, Harbin 150006, China

  • The resonance DsJ(2632) observed by SELEX, has attracted great interests and meanwhile brought up serious dispute. Its spin-parity, so far has not finally determined and if it exists, its quark-structure might be exotic. Following the previous literature where DsJ(2632) is assumed to be a radial-excited state of 1－, we consider the possibilities that it might be a qq ground state of 2+ or the first radial-excited state of 0+ DsJ(2317) and re-calculate its strong decay widths in terms of the Bethe-Salpeter equation. Our results indicate that there still is a sharp discrepancy between the theoretical evaluation and data.
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    [1] . Evdokimov A et al(The SELEX Collaboration). Phys. Rev.Lett., 2004, 93: 2420012. ZHANG A. Phys. Rev., 2005, D72: 0179023. van Beveren E, Rupp G. Phys. Rev. Lett., 2004, 93: 2020014. Godfrey S. Int. J. Mod. Phys., 2005, A20: 3771; NowakM. Int. J. Mod. Phys., 2005, A20: 2295. Simonov Y, Tjon J. Phys. Rev., 2004, D70: 1140136. CHANG C, Kim C, WANG G. Phys. Lett., 2005, B623:2187. Aubert B et al(The BABAR Collaboration). Phys. Rev.Lett., 2003, B90: 242001; Besson D et al(The CLEO Col-laboration). Phys. Rev., 2003, BD68: 032002; Mikami Yet al(The Belle Collaboration). Phys. Rev. Lett., 2004, 92:0120028. Kim C, WANG G. Phys. Lett., 2004, B584: 285; CveticG, Kim C, WANG G et al. Phys. Lett., 2004, B596: 84;Kim C, Lee T, WANG G. Phys. Lett., 2005, B606: 323; CHANG C, CHEN J, WANG G. Commun. Theor. Phys.,2005, 439. DAI Y, JIN H. Phys. Rev., 1995, D52: 236; HUANG C,JIN H, DAI Y. Phys. Rev., 1995, D51: 234710. Greiner W, Rerinhardt J. Quantum Electrodynamics.Berlin: Springer, 199611. YU Y, KE H, DING Y et al. hep-ph/060207712. Maiani L, Piccinini F, Polosa A et al. Phys. Rev., 2004,D70: 054009; LIU Y, DAI Y, ZHU S et al. Phys. Rev.,2004, D70: 094009; CHEN Y, LI X. Phys. Rev. Lett.,2004, 93: 232001; Nicolescu B, de Melo J. hep-ph/0407088; Gupta V. Int. J. Mod. Phys., 2005, A20: 589113. Barnes T, Close F, Dudek J et al. Phys. Lett., 2004, B600:22314. DAI Y, LIU C, LIU Y et al. JHEP, 2004, 0411: 04315. CHAO K. Phys. Lett., 2004, B599: 4316. Swanson E. hep-ph/060111017. Close F. Int. J. Mod. Phys., 2005, A20: 515618. Aubert B et al(BABAR Collaboration). hep-ex/0408087; Galik R. hep-ph/0408190

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KE Hong-Wei, YU Yan-Ming, DING Yi-Bing, GUO Xin-Heng, JIN Hong-Ying, LI Xue-Qian, SHEN Peng-Nian and WANG Guo-Li. Study on Strong Decays of DsJ(2632)[J]. Chinese Physics C, 2006, 30(10): 936-943.
KE Hong-Wei, YU Yan-Ming, DING Yi-Bing, GUO Xin-Heng, JIN Hong-Ying, LI Xue-Qian, SHEN Peng-Nian and WANG Guo-Li. Study on Strong Decays of DsJ(2632)[J]. Chinese Physics C, 2006, 30(10): 936-943. shu
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Received: 2006-03-15
Revised: 2006-04-19
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Study on Strong Decays of DsJ(2632)

    Corresponding author: SHEN Peng-Nian,
  • Department of Physics, Nankai University, Tianjin 300071, China2 Department of Physics, Graduate University of Chinese Academy of Sciences, Beijing 100049, China3 Institute of Low Energy Nuclear Physics, Beijing Normal University, Beijing 100875, China4 Institute of Modern Physics, Zhejiang University, Hangzhou 310027, China5 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China6 Department of Physics, Harbin Institute of Technology, Harbin 150006, China
  • Received Date: 2006-03-15
  • Accepted Date: 2006-04-19
  • Available Online: 2006-10-05

Abstract: The resonance DsJ(2632) observed by SELEX, has attracted great interests and meanwhile brought up serious dispute. Its spin-parity, so far has not finally determined and if it exists, its quark-structure might be exotic. Following the previous literature where DsJ(2632) is assumed to be a radial-excited state of 1－, we consider the possibilities that it might be a qq ground state of 2+ or the first radial-excited state of 0+ DsJ(2317) and re-calculate its strong decay widths in terms of the Bethe-Salpeter equation. Our results indicate that there still is a sharp discrepancy between the theoretical evaluation and data.

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