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Form factors of η c in light-front quark model

  • Chao-Qiang Geng
  • Chong-Chung Lih
Regular Article - Theoretical Physics

Abstract

We study the form factors of the η c meson in the light-front quark model. We explicitly show that the transition form factor of η c γ γ as a function of the momentum transfer is consistent with the experimental data by the BaBar collaboration, while the decay constant of η c is found to be \(f_{\eta_{c}}=230.5^{+52.2}_{-61.0}\) and \(303.6^{+115.2}_{-116.4}~\mathrm{MeV}\) for \(\eta_{c}\sim c\bar{c}\) by using two η c γγ decay widths of 5.3±0.5 and 7.2±2.1 keV, given by Particle Data Group and Lattice QCD calculation, respectively.

Keywords

Form Factor Decay Constant Decay Width Particle Data Group Transition Form Factor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

This work was partially supported by National Center for Theoretical Sciences, SZL-10004008, National Science Council (NSC-97-2112-M-471-002-MY3, NSC-98-2112-M-007-008-MY3, and NSC-101-2112-M-007-006-MY3) and National Tsing-Hua University (102N1087E1 and 102N2725E1)

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Copyright information

© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica 2013

Authors and Affiliations

  1. 1.College of Mathematics & PhysicsChongqing University of Posts & TelecommunicationsChongqingChina
  2. 2.Department of OptometryShu-Zen College of Medicine and ManagementKaohsiung HsienTaiwan
  3. 3.Physics DivisionNational Center for Theoretical SciencesHsinchuTaiwan
  4. 4.Department of PhysicsNational Tsing Hua UniversityHsinchuTaiwan

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