THE DECAY η'c → ηc ππ
نویسندگان
چکیده
منابع مشابه
Resummation of QCD Corrections to the ηc Decay Rate
We examine the ratio of the decay rate of the ηc into light hadrons to the decay rate into photons and find that most of the large next-to-leading-order (NLO) correction is associated with running of the strong coupling αs. We resum such contributions by analyzing final-state chains of vacuum-polarization bubbles. We show that the nonperturbative parts of the bubble chains can be absorbed into ...
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Charmonia are flavour singlet mesons and thus in principle contributions from disconnected quark line diagrams might affect their masses, either directly or via mixing with other flavour singlet channels. We present a first study that takes both effects into account. We employ improved stochastic all-to-all propagator techniques (including new methods) to calculate the diagrams that appear with...
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ژورنال
عنوان ژورنال: Modern Physics Letters A
سال: 2002
ISSN: 0217-7323,1793-6632
DOI: 10.1142/s0217732302007892