Instanton contribution to the quark form factor

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود 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

Non-zero Quark Modes Contribution to the QCD-Instanton-Induced Deep Inelastic Scattering

Instanton-induced deep-inelastic processes are considered. Unlike previous results we calculate nonzero quark modes contribution. As was shown [1], QCD-instantons can appear at the intermediate stage of deep inelastic scattering (DIS) and be, in principle, observed at HERA (DESY) [2, 3]. Specifically, instantons can be produced in quark-gluon subprocess (Fig.1).

متن کامل

Instanton Contribution to the Sivers Function

We study the Sivers function for valence u and d quarks in the proton within the instanton model for QCD vacuum, adopting the MIT bag model wave functions for quarks. Within approaches based on perturbative one-gluon final state interactions a non-zero value of the Sivers function is related to the presence of both S and P wave components in quark wave functions. We show that the instanton-indu...

متن کامل

The spin contribution to the form factor of quantum graphs

Following the quantisation of a graph with the Dirac operator (spin-1/2) we explain how additional weights in the spectral form factor K(τ) due to spin propagation around orbits produce higher order terms in the small-τ asymptotics in agreement with symplectic random matrix ensembles. We determine conditions on the group of spin rotations sufficient to generate CSE statistics. E-mail address: j...

متن کامل

Quark Propagation in the Random Instanton Vacuum

This is the first of a series of papers devoted to a systematic study of QCD correlation functions in a framework of 'instanton vacuum' models. The topic of this paper is to work out approximate formulae for quark propagators in a multi-instanton environment. As an application, and also as a necessary step toward understanding the correlation functions, we study the propagators of scalar and sp...

متن کامل

Instanton induced quark dynamics and the pentaquark

We analyze the existence of the exotic Θ from the perspective of instanton induced quark dynamics. The ’t Hooft interaction gives strong attraction in specific channels of the triquark uds̄ and diquark ud configurations. In particular it leads to a light uds̄ triquark cluster, with the mass around 750 MeV, in the I = 0, S = 1/2 and color 3 configuration, and a light ud-diquark configuration, with...

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: 2002

ISSN: 0556-2821,1089-4918

DOI: 10.1103/physrevd.66.074009