Instantons and Spin-Flavor effects in Hadron Physics

نویسنده

  • N. I. Kochelev
چکیده

We discuss the role of instantons in the spectroscopy of ordinary and exotic hadrons as well as in high energy reactions. We argue that the instanton induced flavorand spin-dependent quark-quark and quark-gluon interactions can explain many features of the hadron spectrum. The observed anomalous spin and flavor effects in various reactions with hadrons can also be understood within the instanton model for QCD vacuum. Pacs: 12.38.Aw, 12.38.Lg, 12.39.Ba, 12.39.x

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

Why Do We Need Instantons in Strangeness Hadron Physics?

Strangeness nuclear physics has reached a new era, which requires elevation of phenomenological analyses of hypernuclear phenomena to a deeper understanding of the fundamental interactions from QCD viewpoint. Recent coordinated efforts in experimental and theoretical researches revealed several interesting features of hyperon-nucleon and hyperon-hyperon interactions. For instance, it is establi...

متن کامل

Qcd and Nuclear Physics * , †

The main part of this talk is a review and summary of how QCD is used in two main areas of nuclear physics, namely in determining the quark flavor and spin content of the proton and inThe main part of this talk is a review and summary of how QCD is used in two main areas of nuclear physics, namely in determining the quark flavor and spin content of the proton and in ultrarelativistic heavy ion ...

متن کامل

The 27-plet baryons with spin 3/2 under SU(3) symmetry

We investigate the spin 3/2 baryons in the 27-plet based on flavor SU(3) symmetry. For J = 3/2, we find all the candidates for non-exotic members. For J = 3/2−, we predict a new non-exotic member Λ(1780). Fitting the mass spectrum and calculating the widths of the members show an approximate symmetry of the 27-plet of SU(3). We find that the exotic members have relatively large widths and the Ξ...

متن کامل

Electromagnetic form factors in a collective model of the nucleon.

We study the electromagnetic form factors of the nucleon in a collective model of baryons. Using the algebraic approach to hadron structure, we derive closed expressions for both elastic and transition form factors, and consequently for the helicity amplitudes that can be measured in electroand photoproduction. Effects of spin-flavor symmetry breaking and of swelling of hadrons with increasing ...

متن کامل

Flavor Separation in Λ - Baryon Fragmentation

It is shown that neutrino and antineutrino deep inelastic scattering of unpolarized and polarized Λ and Λ productions, can provide a clean separation of unpolarized and polarized fragmentation functions of a quark into a Λ, for both light-flavor quarks and antiquarks and also for strange quarks. Combining with Λ and Λ productions in polarized electron deep inelastic scattering, one can systemat...

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 2008