Current quark mass dependence of nucleon magnetic moments and radii

نویسندگان

  • I. C. Cloët
  • G. Eichmann
  • V. V. Flambaum
  • C. D. Roberts
چکیده

A calculation of the current-quark-mass-dependence of nucleon static electromagnetic properties is necessary in order to use observational data as a means to place constraints on the variation of Nature’s fundamental parameters. A Poincaré covariant Faddeev equation, which describes baryons as composites of confined-quarks and -nonpointlike-diquarks, is used to calculate this dependence. The results indicate that, like observables dependent on the nucleons’ magnetic moments, quantities sensitive to their magnetic and charge radii, such as the energy levels and transition frequencies in Hydrogen and Deuterium, might also provide a tool with which to place limits on the allowed variation in Nature’s constants.

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

Hyperon electromagnetic properties in two-flavor chiral perturbation theory

properties in two-flavor chiral perturbation theory. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. The pion-mass dependence of hyperon electromagnetic properties...

متن کامل

Strange nucleon form factors in the perturbative chiral quark model

We apply the perturbative chiral quark model at one loop to calculate the strange form factors of the nucleon. A detailed numerical analysis of the strange magnetic moments and radii of the nucleon, and also the momentum dependence of the form factors is presented. PACS: 12.39.Fe, 12.39.Ki, 13.40.Gp, 14.20.Dh

متن کامل

Baryon form factors in a diquark–quark bound state description

Nucleon form factors are calculated in a relativistic diquark–quark picture based on the Nambu–Jona-Lasinio model. The nucleon wave function is obtained in a static approximation to the quark exchange interaction between the valence quark and the diquark. We evaluate the valence quark and 0–diquark contribution to the nucleon electromagnetic and weak currents. We find reasonable electric charge...

متن کامل

Nucleon Form Factors in a Relativistic Three-quark Model

We report the calculation of electromagnetic form factors of nucleons within a relativistic three-quark model with Gaussian shape for the nucleon-quark vertex. The allowed region for two adjustable parameters, the range parameter ΛN in the Gaussian and the constituent quark mass mq, is obtained from fitting the data for magnetic moments and electromagnetic radii of nucleons. It is found that th...

متن کامل

Nucleon structure with dynamical (2+1)-flavor domain wall fermions lattice QCD

We report isovector form factors and low moments of isovector structure functions of nucleon from the coarse RIKEN-BNL-Columbia (RBC) and UKQCD joint dynamical (2+1)-flavor domain-wall fermions (DWF) ensembles. The lattice cut off is estimated at a−1 = 1.7 GeV. The lattice volume is as large as 2.7 fm across. The dynamical strange mass is set at slightly heavier than physical, and degenerate up...

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 2008