Y(4260) and possible charmonium assignment

Thumbnail Image
Full text at PDC
Publication Date
Advisors (or tutors)
Journal Title
Journal ISSN
Volume Title
American Physical Soc
Google Scholar
Research Projects
Organizational Units
Journal Issue
The newly reported Y(4260) becomes the second most massive state in the charmonium family. We argue that it displaces the 4415 as the (largely) 4s vector charmonium state, recall s d wave interference to explain the lack of a signal in e e ! hadrons and suggest some further study avenues that can exclude exotic meson assignments. The absence of a J= KK mode can be understood, beyond phase space suppression, to be a consequence of chiral symmetry. We also provide a model calculation in this sector showing that, although forcing the fit somewhat (which suggests a small sea quark wave function component), the state can be incorporated in a standard scheme
© 2005 The American Physical Society. The author thanks Fundacion del Amo-Universidad Complutense for financial support, the hospitality of the SLAC theory group, and useful conversations with H. Quinn, A. Snyder, K. Yi, U. Mallik, G. Hou, M. Herrero, and W. Dunnwoodie. This work is based on a long and fruitful collaboration with S. R. Cotanch. The work was partly supported by Spanish MCYT Grant No. FPA 2004- 02602 and U.S. DOE Grant No. DE-FG02-97ER41048
Unesco subjects
[1] B. Aubert et al. (BABAR Collaboration), hep-ex/0506081 [Phys. Rev. Lett. (to be published)]. [2] S. Godfrey and N. Isgur, Phys. Rev. D 32, 189 (1985). [3] F. J. Llanes-Estrada and S. R. Cotanch, Phys. Lett. B 504, 15 (2001). [4] T. Barnes, S. Godfrey, and E. S. Swanson, hep ph/0505002 [Phys. Rev. D (to be published)]. [5] N. Brambilla et al., hep-ph/0412158. [6] F. J. Llanes-Estrada and S. R. Cotanch, Nucl. Phys. A697, 303 (2002). [7] F. J. Llanes-Estrada et al., Phys. Rev. C 70, 035202 (2004). [8] F. J. Llanes-Estrada and S. R. Cotanch, Phys. Rev. Lett. 84, 1102 (2000). [9] S. Eidelman et al. (Particle Data Group), Phys. Lett. B 592, 1 (2004). [10] F. J. Llanes-Estrada and S. R. Cotanch, nucl th/0408038. [11] J. Z. Bai et al. (BES Collaboration), Phys. Rev. D 62, 012002 (2000). [12] E. Eichten et al., Phys. Rev. D 21, 203 (1980). [13] E. S. Swanson, Phys. Lett. B 598, 197 (2004). [14] T. Barnes et al., Phys. Lett. B 600, 223 (2004). [15] A. P. Szczepaniak, Phys. Lett. B 567, 23 (2003). [16] P. Bicudo and G. M. Marques, AIP Conf. Proc. 717, 561 (2004). [17] L. Maiani et al., Phys. Rev. D 70, 054009 (2004). [18] B. Nicolescu and J. P. B. de Melo, hep-ph/0407088. [19] U. Dmitrasinovic, Phys. Rev. Lett. 94, 162002 (2005). [20] X. Liao and T. Manke, hep-lat/0210030. [21] Katja Waidelich, Masters thesis, North Carolina State University, 2000. [22] C. J. Morningstar and M. J. Peardon, Phys. Rev. D 60, 034509 (1999). [23] P. Bicudo et al., SLAC Report No. SLAC-PUB-11312, 2005. [24] X. Liu, X. Q. Zeng, and X. Q. Li, hep-ph/0507177. [25] J. E. T. Ribeiro, Z. Phys. C 5, 27 (1980). [26] S. L. Zhu, hep-ph/0507025. [27] E. Kou and O. Pene, hep-ph/0507119. [28] L. Maiani et al., hep-ph/0507062.