The General Qcd Parametrization and the 1/n C Expansion: a Comparison

نویسندگان

  • G Dillon
  • G Morpurgo
چکیده

A comparison is presented of the two methods mentioned in the title for treating hadron properties in QCD. While the general parametrization is derived exactly from real QCD, the equivalence of the large N c description to real QCD, with 3 colors, is questionable. The reason why in some cases the large N c method approximately works (while in others does not) is clarified.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

The General Qcd Parametrization and the Large N C Description: Some Remarks

Some remarks-stimulated by a recent paper of Buchmann and Lebed-are presented on the two methods mentioned in the title for treating hadron properties in QCD.

متن کامل

Parametrization of Pedestrian Injuries and its Utilisation in Proving Traffic Accidents Course Using Injury Signatures and Contact Signatures

Background: The paper points out the present limited possibility of using the verbal description of injuries for the needs of experts from the field of road transportation as relevant criminalistics traces, as well as the options of the FORTIS system that creates a new area for a deeper interdisciplinary approach in the field of expert evidence. Further a description of how to create injury si...

متن کامل

Nucleon Structure Functions within a Chiral Soliton Model ∗

We study nucleon structure functions within the bosonized Nambu–Jona–Lasinio model where the nucleon emerges as a chiral soliton. We discuss the model predictions on the Gottfried sum rule for electron–nucleon scattering. A comparison with a low–scale parametrization shows that the model reproduces the gross features of the empirical structure functions. We also compute the leading twist contri...

متن کامل

The role of electroweak penguin and magnetic dipole QCD penguin on hadronic b Quark Decays

This research, works with the effective Hamiltonian and the quark model. Using, the decay rates of matter-antimatter of b quark was investigated. We described the effective Hamiltonian theory which was applied to the calculation of current-current (Q1,2), QCD penguin (Q3,…,6), magnetic dipole (Q8) and electroweak penguin (Q7,…,10) decay rates. The gluonic penguin structure of hadronic decays ...

متن کامل

Instantons and the Large N C Limit of Qcd

We summarize our current understanding of instantons in the large Nc limit of QCD. We also present some recent results from simulations of the instanton liquid in QCD for Nc > 3. 1 Historical Overview Both instantons and the large N c expansion are important corner stones in our attempts to understand non-perturbative aspects of QCD. Instantons are related to topological aspects of QCD and play...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2000