---+++ 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 * BES * CLEO * [[http://pdg.lbl.gov/2012/listings/rpp2012-list-psi-3770.pdf][PDG 2012 Entry]] * Search for Baryonic Decays of ψ(3770) and ψ(4040), [[http://arxiv.org/abs/1305.1782][BESIII Collaboration: M. Ablikim et al., arXiv:1305.1782 [hep-ex]]] * Studies of the ψ(2S) and ψ(3770) at KEDR, [[http://indico.cern.ch/contributionDisplay.py?contribId=404&confId=181298][, Korneliy TODYSHEV et al., at ICHEP2012]] * [1] http://prd.aps.org/abstract/PRD/v76/i12/e122002 * ---+++ Theoretical Papers * Study of the branching ratio of ψ(3770)->DD in e+e-->DD scattering, [[http://prd.aps.org/abstract/PRD/v81/i1/e011501][Hai-Bo Li, Xiao-Shuai Qin, Mao-Zhi Yang, Phys.Rev.D81:011501,2010]] * Isospin violating decay of ψ(3770)->J/ψπ^0, [[http://prd.aps.org/abstract/PRD/v85/i11/e114007][Ze-kun Guo, S. Narison1, J.-M. Richard2, Qiang Zhao, Physical Review D 85 (2012) 114007]] -- Main.NigelWatson - 23 May 2013
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Topic revision: r4 - 24 May 2013 - _47C_61UK_47O_61eScience_47OU_61Birmingham_47L_61ParticlePhysics_47CN_61peter_32griffith
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