QCD sum-rule interpretation ofX(3872)withJPC=1++mixtures of hybrid charmonium andD¯D*molecular currents
نویسندگان
چکیده
منابع مشابه
Hybrid charmonium from lattice QCD∗
We review our recent results on the J PC = 0 −− exotic hybrid charmonium mass and J PC = 0 −+ , 1 −− and 1 ++ nonexotic hybrid charmonium spectrum from anisotropic improved lattice QCD and discuss the relevance to the recent discovery of the Y (4260) state and future experimental search for other states.
متن کاملQCD Sum Rule Analysis
We present a QCD sum rule calculation of the spin-symmetry violating universal function χ2(v · v′), which appears at order 1/mQ in the heavy quark expansion of meson form factors. This function vanishes in the standard approximation, where radiative effects are neglected. For the first time, the complete set of diagrams arising at order αs is evaluated. In particular, we find χ2(1) = −(3.8± 0.4...
متن کاملQcd Sum Rule Approach
In these lectures, I describe the techniques used within the QCD sum rule approach. The basic concepts of the approach are introduced using a simple model of quantum-mechanical oscillator in 2+1 dimensions. Then I discuss their field-theoretical extension and the construction of the operator product expansion for current correlators in QCD. The calculation of static parameters is illustrated on...
متن کاملQcd Sum Rule Analysis Of
We use three-point QCD sum rules to calculate the form factors governing the rare exclusive decays B → (K,K) ll, B → (K,K) νν̄. We predict the branching ratios, the invariant mass distributions of the lepton pair for B → (K,K) ll, and the spectra of missing energy for B → (K,K) νν̄. The forward-backward asymmetry in B → Kll provides us with interesting tests of the Standard Model and its extensio...
متن کاملQCD sum rule analysis of the charmonium system : The charm quark mass
In this work, the charm quark mass is obtained from a QCD sum rule analysis of the charmonium system. In our investigation we include results from non-relativistic QCD at next-to-next-to-leading order. Using the pole mass scheme, we obtain a value of Mc = 1.70 ± 0.13 GeV for the charm pole mass. The introduction of a potential-subtracted mass leads to an improved scale dependence. The running M...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2013
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.88.045027