Strangeness contributions to nucleon form factors
نویسندگان
چکیده
منابع مشابه
Strangeness contributions to nucleon form factors
We review a recent theoretical determination of the strange quark content of the electromagnetic form factors of the nucleon. These are compared with a global analysis of current experimental measurements in parity-violating electron scattering. PACS. 14.20.Dh Protons and neutrons – 11.30.Er Charge conjugation, parity, time reversal, and other discrete symmetries in particles and fields
متن کاملnucleon hyperon form factors and nucleon strangeness
A crucial input for recent meson hyperon cloud model estimates of the nucleon matrix element of the strangeness current are the nucleon–hyperon–K (NYK) form factors which regularize some of the arising loops. Prompted by new and forthcoming information on these form factors from hyperon–nucleon potential models, we analyze the dependence of the loop model results for the strange–quark observabl...
متن کاملK∗ nucleon hyperon form factors and nucleon strangeness
A crucial input for recent meson hyperon cloud model estimates of the nucleon matrix element of the strangeness current are the nucleon–hyperon–K∗ (NY K∗) form factors which regularize some of the arising loops. Prompted by new and forthcoming information on these form factors from hyperon–nucleon potential models, we analyze the dependence of the loop model results for the strange–quark observ...
متن کاملChiral Symmetry and the Nucleon ’ s Vector Strangeness Form Factors
The nucleon’s strange-quark vector current form factors are studied from the perspective of chiral symmetry. It is argued that chiral perturbation theory cannot yield a prediction for the strangeness radius and magnetic moment. Arrival at definite predictions requires the introduction of additional, modeldependent assumptions which go beyond the framework of chiral perturbation theory. A variet...
متن کاملStrangeness in the Nucleon: the Strange Vector Form Factors
We discuss two descriptions of the nucleon’s strange vector form factors in the framework of vector meson dominance. The first, an updated and extended version of Jaffe’s dispersion analysis, approximates the spectral functions of the form factors as a sum of vector meson poles, whereas the second combines vector meson dominance in the ω and φ meson sector with an intrinsic strangeness distribu...
متن کاملذخیره 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: The European Physical Journal A
سال: 2007
ISSN: 1434-6001,1434-601X
DOI: 10.1140/epja/i2006-10409-9