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000018594 0247_ $$2DOI$$a10.1103/PhysRevD.83.034013
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000018594 0247_ $$2arXiv$$aarXiv:1008.3632$$chep-ph
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000018594 084__ $$2WoS$$aAstronomy & Astrophysics
000018594 084__ $$2WoS$$aPhysics, Particles & Fields
000018594 084__ $$2PACS$$a13.25.Gv
000018594 084__ $$2PACS$$a12.39.Fe
000018594 084__ $$2PACS$$a12.39.Hg
000018594 084__ $$2PACS$$a14.40.Pq
000018594 1001_ $$0P:(DE-HGF)0$$aGuo, F.-K.$$b0
000018594 245__ $$aEffect of charmed meson loops  on charmonium transitions
000018594 260__ $$a[S.l.]$$bSoc.$$c2011
000018594 264_1 $$2Crossref$$3online$$bAmerican Physical Society (APS)$$c2011-02-11
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000018594 440_0 $$04923$$aPhysical Review D$$v83$$x1550-7998$$y3
000018594 500__ $$aWe thank Yu Jia, Thomas Mannel, and Joan Soto for useful discussions. F.-K.G., C. H., and U.-G. M. thank the Helmholtz Association for funds provided to the virtual institute "Spin and strong QCD'' (VH-VI-231) and by the DFG (SFB/TR 16, "Subnuclear Structure of Matter'') and the European Community-Research Infrastructure Integrating Activity Study of Strongly Interacting Matter'' (acronym HadronPhysics2, Grant Agreement No. 227431) under the Seventh Framework Program of the EU. U.-G. M. also thanks the BMBF for support (Grant No. 06BN9006). Q.Z. and G. L. acknowledge the support, in part, from the National Natural Science Foundation of China (Grants No. 10675131, No. 10491306, and No. 10947007), Chinese Academy of Sciences (No. KJCX3-SYW-N2), and Ministry of Science and Technology of China (No. 2009CB825200). G. L. thanks the partial support from Shandong Province (Grant No. ZR2010AM011).
000018594 520__ $$aThe effects of intermediate charmed mesons on charmonium transitions with the emission of one pion or eta are studied systematically. Based on a nonrelativistic effective field theory we show that charmed meson loops are enhanced compared to the corresponding tree-level contributions for transitions between two S-wave charmonia as well as for transitions between two P-wave charmonia. On the contrary, for the transitions between one S-wave and one P-wave charmonium state, the loops need to be analyzed case by case and often appear to be suppressed. The relation to and possible implications for an effective Lagrangian approach are also discussed. This study at the same time provides a cross-check for the numerical evaluations.
000018594 536__ $$0G:(DE-Juel1)FUEK413$$2G:(DE-HGF)$$aPhysik der Hadronen und Kerne$$cP53$$x0
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000018594 650_7 $$2INSPIRE$$aeffective field theory: nonrelativistic
000018594 650_7 $$2INSPIRE$$acharmed meson: intermediate state
000018594 650_7 $$2INSPIRE$$acharmonium: hadronic decay
000018594 650_7 $$2INSPIRE$$aeffective Lagrangian: chiral
000018594 650_7 $$2INSPIRE$$api0: production
000018594 650_7 $$2INSPIRE$$aeta: production
000018594 650_7 $$2INSPIRE$$aFeynman graph: higher-order
000018594 650_7 $$2INSPIRE$$atree approximation
000018594 650_7 $$2INSPIRE$$aground state
000018594 650_7 $$2INSPIRE$$aexcited state
000018594 650_7 $$2INSPIRE$$acharmonium: width
000018594 650_7 $$2INSPIRE$$aamplitude analysis
000018594 650_7 $$2INSPIRE$$anumerical calculations
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000018594 7001_ $$0P:(DE-Juel1)131182$$aHanhart, C.$$b1$$uFZJ
000018594 7001_ $$0P:(DE-HGF)0$$aLi, G.$$b2
000018594 7001_ $$0P:(DE-Juel1)131252$$aU.-G. Meißner, U.-G.$$b3$$uFZJ
000018594 7001_ $$0P:(DE-HGF)0$$aZhao, Q.$$b4
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000018594 8567_ $$uhttp://dx.doi.org/10.1103/PhysRevD.83.034013
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