Constraining nucleon strangeness
نویسندگان
چکیده
منابع مشابه
Nucleon Strangeness: Theory
The status of theoretical calculations of the strange quark vector current form factors of the nucleon is reviewed. The role played by the q ¯ q sea in the low-energy structure of the nu-cleon remains a topic of ongoing interest in hadron structure theory. Of particular interest is the strange quark component of this sea, since s¯ s pairs constitute the lightest pure sea quark degree of freedom...
متن کاملStrangeness in the Nucleon
There are several different experimental indications, such as the σπN term, strange spin polarization, strangeness contribution to the magnetic moment of the proton, ratio of strange and non strange quark flavor distributions which suggest that the nucleon contains a hidden strangeness component which is contradictory to the naive constituent quark model. Chiral constituent quark model with con...
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We study contributions to the nucleon strange quark vector current form factors from intermediate states containing K * mesons. We show how these contributions may be comparable in magnitude to those made by K mesons, using methods complementary to those employed in quark model studies. We also analyze the degree of theoretical uncertainty associated with K * contributions .
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...
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A large violation of the Okubo-Zweig-Iizuka rule was discovered in the annihilation of stopped antiprotons. The explanation of these experimental data is discussed in the framework of the model assumed that the nucleon strange sea quarks are polarized.
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ژورنال
عنوان ژورنال: Physical Review C
سال: 2015
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.91.035205