Topological objects and chiral symmetry breaking in QCD

نویسندگان

  • Manfried Faber
  • Thomas Schweigler
چکیده

برای دانلود 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

Topological Origin of Chiral Symmetry Breaking in QCD and in Gravity

We show that the assumption of non-zero topological susceptibility of the vacuum in a fermion-free version of a theory, such as gravity or QCD, suffices to conclude the following: Once Nf massless fermion flavors are added to the theory, they break the chiral flavor symmetry dynamically, down to a subgroup that would be anomaly-free under gauging; In both theories, the pseudo-Goldstone correspo...

متن کامل

Proposal for Topologically Unquenched QCD

A proposal is presented for simulating an improvement on quenched QCD with dynamical fermions which interact with the gluon configuration only via the topological index of the latter. Strengths and shortcomings of the method are discussed and it is argued that the approximation – though being crude – shares some qualitative aspects of full QCD which relate to the issue of chiral symmetry breaking.

متن کامل

The fate of UA(1) and topological features of QCD at finite temperature

The nature of chiral phase transition for QCD with two light quark flavors is not yet completely resolved. This is primarily because one has to understand whether or not the anomalous U(1) symmetry in the flavor sector is effectively restored along with the chiral symmetry. Since the physics near the chiral phase transition is essentially non-perturbative, we employ first principles lattice tec...

متن کامل

Topological Charge and U(1)a Symmetry in the High Temperature Phase of Qcd

We discuss the global symmetries of the high temperature phase of QCD with Nf massless quarks. We show that the U(Nf ) × U(Nf ) symmetries are only violated by operators of dimension ≥ 3Nf . For Nf > 2 this implies that the thermal two-point correlation functions of the η′ and πa’s are identical. We discuss the implications of this for the chiral phase transition at finite temperature. nick@zen...

متن کامل

PROBING THE QCD VACUUM a

Heavy quark bound states are used as significative probes of the QCD vacuum and the mechanism of confinement. 1 Strong interaction and topological nontrivial configurations The focus of this school is on the " Topology of strongly correlated systems " in different areas ranging from QCD to condensed matter systems. In all these fields, investigations were presented about nontrivial topological ...

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

برای دانلود 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

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2012