摘要We study the masses of QqQq' states with JPC=0++, 1++, 1+- and 2++ in the chiral SU(3) quark model, where Q is the heavy quark (c or b) and q (q') is the light quark (u, d or s). According to our numerical results, it is improbable to make the interpretation of [cncn]1++ and [cncn]2++ (n=u, d) states as X(3872) and Y(3940), respectively. However, it is interesting to find the tetraquarks in the bqbq' system.
Abstract：We study the masses of QqQq' states with JPC=0++, 1++, 1+- and 2++ in the chiral SU(3) quark model, where Q is the heavy quark (c or b) and q (q') is the light quark (u, d or s). According to our numerical results, it is improbable to make the interpretation of [cncn]1++ and [cncn]2++ (n=u, d) states as X(3872) and Y(3940), respectively. However, it is interesting to find the tetraquarks in the bqbq' system.
[1] Choi S K et al (Belle collaboration) 2003 Phys. Rev.Lett. 91 262001 Acosta D et al (CDF II colaboration) 2004 Phys. Rev. Lett. 93 072001 Abazov V W et al (DO collaboration) 2004 Phys. Rev. Lett. 93 162002 Aubert B et al (BaBar collaboration) 2005 Phys. Rev. D 71 071103 [2] Choi S K et al (Belle collaboration) 2005 Phys. Rev. Lett. 94 182002 [3] Aubert B et al (BaBar collaboration) 2005 Phys. Rev.Lett. 95 142001 [4] Close F E and Page P R 2004 Phys. Lett. B 578 119 Voloshin M B 2004 Phys. Lett. B 579 316 Swanson E S 2004 Phys. Lett. B 588 189 Swanson E S 2004 Phys. Lett. B 598 197 Swanson E S Preprint hep-ph/0410284 [5] Kou E and Pene O Preprint hep-ph/0507119 Close F E and Page P R 2005 Phys. Lett. B 628 215 Zhu S L 2005 Phys. Lett. B 625 212 [6] Maiani L, Piccinini F, Polosa A D and Riquer V 2005 Phys.Rev. D 71 014028 Ebert D, Faustov R N and Galkin V O 2006 Phys. Lett. B 634 214 Cui Y, Chen X L, Deng W Z and Zhu S L 2007 High Energy Phys. Nucl.Phys. 31 7 [7] Zhang H X, Wang W L, Dai Y B and Zhang Z Y 2007 Commun.Theor. Phys. (accepted) (hep-ph/0607207) [8] Zouzou S, Slivestre-Brac B, Gignoux C and Richard J M 1986 Z.Phys. C 30 457 Pepin S, Stancu Fl, Gerovese M and Richard J M 1997 Phys. Lett. B 393 119 [9] Huang F and Zhang Z Y 2004 Phys. Rev. C 70 064004 Huang F, Zhang D, Zhang Z Y and Yu Y W 2005 Phys. Rev. C 71 064001 Zhang D, Huang F, Zhang Z Y and Yu Y W 2005 Nucl. Phys. A 756 215 [10] Bigi I, Maiani L, Piccinini F, Polosa A D and Riquer V 2005 Phys. Rev. D 72 114016
2007, Vol. 24 
