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Belle J/psi+eta_c anomaly and a very light scalar boson | | Kingman Cheung
; Wai-Yee Keung
; | | Date: |
1 Nov 2003 | | Journal: | Phys.Rev. D69 (2004) 094026 | | Subject: | hep-ph hep-ex | | Affiliation: | Nat. Tsing Hua Univ.) and Wai-Yee Keung (Illinois, Chicago | | Abstract: | The large rate of the $J/psi+eta_c$ production observed by the Belle collaboration has posed a serious challenge to our understanding of the quarkonium. We examine a scenario that there exists a light scalar boson around 5 GeV, with an enhanced coupling solely to the charm quark. Such a scenario would explain the Belle anomaly. It also predicts a significant increase in $J/psi$ plus open charm pair production. An immediate test for the scalar boson is to look for a peak around 5 GeV in the recoil mass spectrum of $J/psi$, because the scalar boson can also be produced in association with the $J/psi$. Finally, we also point out that the process $e^+ e^- o H gamma$ is sizable for observation. | | Source: | arXiv, hep-ph/0311003 | | Services: | Forum | Review | PDF | Favorites | |
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