Updated analysis ofɛ′/ɛin the standard model with hadronic matrix elements from the chiral quark model

نویسندگان
چکیده

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

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Ε/ε in the Standard Model with Hadronic Matrix Elements from the Chiral Quark Model

If we imagine to be back in 1997—looking at the experimental results for the ratio ε/ε and its theoretical estimates—we will find ourselves in a rather confusing situation in which the theoretical estimates favor values of the order of 10 and the experiments disagree by more than 3σ of their errors, and, moreover, do not rule out the super-weak scenario in which ε/ε vanishes (for a review, see,...

متن کامل

Hadronic Matrix Elements from the Lattice A

Lattice matrix elements are briefly reviewed. In the quenched approximation fB, BB and BK are now under good control. Experimental hints for f expt DS > f DS are noted; precise determination of fDS from experiment as well as from the lattice is strongly advocated. Lattice calculations of the form factor for B → πlν at relatively large value of q have made good progress and should be useful in c...

متن کامل

The Dilated Chiral Quark Model

It is argued that constituent quarks live in an effective theory that possesses an approximate conformal invariance. An effective lagrangian is constructed which in the large-Nc approximation incorporates Regge asymptotic constraints. The resulting picture explains why linear-sigma models provide successful constituent quark descriptions, both at zero and finite temperature. Our analysis sugges...

متن کامل

2 00 4 Updated analysis of meson - nucleon sigma terms in the perturbative chiral quark model

We present an updated analysis of meson-baryon sigma terms in the per-turbative chiral quark model, which is based on effective chiral Lagrangian. The new feature concerns the inclusion of excited states in the quark prop-agator. Its influence on meson loops is shown to lead in particular for the pion-nucleon sigma term to an enhancement relevant for the current evaluation of this quantity. We ...

متن کامل

Chiral Quark Model

Abstract. In this talk I review studies of hadron properties in bosonized chiral quark models for the quark flavor dynamics. Mesons are constructed from Bethe–Salpeter equations and baryons emerge as chiral solitons. Such models require regularization and I show that the two–fold Pauli–Villars regularization scheme not only fully regularizes the effective action but also leads the scaling laws ...

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

ژورنال

عنوان ژورنال: Physical Review D

سال: 2001

ISSN: 0556-2821,1089-4918

DOI: 10.1103/physrevd.63.056009