Previous work in LHCb
Some initial work going on in Bristol (2nd year student plus Nick Brook)
Motivation
The ψ(3770) is an excited state of charmonium and is the closest resonance to the DDbar threshold. It is therefore expected to decay strongly almost entirely to two D mesons. However, the BESII collaboration has reported a non-negligible measured branching fraction to non-DD as (13.4±5.0±3.6)%[1]. The CLEO collaboration has published measurements that are consistent with a negligble branching fraction.
So far the ψ(3770) has not been seen at a hadron collider. Observation of ψ(3770)→μμ at LHCb and study of the decay to light hadrons, eg. ψ(3770)→ηΦ may aid in settling the discrepancy.
Experimental Papers
Theoretical Papers
- Study of the branching ratio of ψ(3770)->DD in e+e-->DD scattering, Hai-Bo Li, Xiao-Shuai Qin, Mao-Zhi Yang, Phys.Rev.D81:011501,2010
- Isospin violating decay of ψ(3770)->J/ψπ^0, Ze-kun Guo, S. Narison1, J.-M. Richard2, Qiang Zhao, Physical Review D 85 (2012) 114007
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NigelWatson - 23 May 2013
Topic revision: r4 - 24 May 2013
- _47C_61UK_47O_61eScience_47OU_61Birmingham_47L_61ParticlePhysics_47CN_61peter_32griffith?