Sum rule approach to a soft dipole mode inΛhypernuclei
نویسندگان
چکیده
منابع مشابه
Qcd 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 کاملA Sum Rule Approach to the Violation of Dashen’s Theorem
A classic sum rule by Das et al. is extended to seven of the low-energy constants Ki, introduced by Urech, which parameterize electromagnetic corrections at chiral order O(ep). Using the spurion formalism, a simple convolution representation is shown to hold and the structure in terms of the chiral renormalization scale, the QCD renormalization scale and the QED gauge parameter is displayed. Th...
متن کاملIntroduction into Qcd 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 کاملImproved QCD Sum-Rule Approach to Heavy-Meson Decay Constants
A visible improvement of the QCD sum-rule framework, achieved only recently by a slightly more sophisticated consideration of the hadron excitations and continuum, is applied to the extraction of the decay constants of heavy-light pseudoscalar mesons, such as the D, Ds, B and Bs mesons, from two-point correlators of heavy-light pseudoscalar currents [1]. This analysis is carried out entirely in...
متن کاملOn the Sum Rule Approach to Quarkonium-Hadron Interactions
We extend a recent sum rule calculation for inelastic quarkonium-hadron interactions to realistic parton distribution functions; we also include finite target-mass corrections. The last modification is shown effectively changes the gluon distribution function entering the r.h.s. of resulting sum rules. We also comment on applicability of sum-rule approach to large momenta n. In a recent study [...
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 C
سال: 2013
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.88.064303