Polarization in hadronicΛhyperon production and chiral-odd twist-3 distribution
نویسندگان
چکیده
منابع مشابه
The chirally-odd twist-3 distribution function ea(x) in the chiral quark-soliton model
The chirally-odd twist-3 nucleon distribution e(x) is studied in the large-Nc limit in the framework of the chiral quark-soliton model at a low normalization point of about 0.6 GeV. The remarkable result is that in the model e(x) contains a δ-function-type singularity at x = 0. The regular part of e(x) is found to be sizeable at the low scale of the model and in qualitative agreement with bag m...
متن کاملQ 2 dependence of chiral-odd twist-3 distribution e(x, Q 2)
We discuss the Q dependence of the chiral-odd twist-3 distribution e(x,Q). The anomalous dimension matrix for the corresponding twist-3 operators is calculated in the one-loop level. This study completes the calculation of the anomalous dimension matrices for all the twist-3 distributions together with the known results for the other twist-3 distributions g2(x,Q ) and hL(x,Q ). We also have con...
متن کاملThe chirally-odd twist-3 distribution ea(x)
Properties of the nucleon twist-3 distribution function e(x) are reviewed. It is emphasized that the QCD equations of motion imply the existence of a δ-function at x = 0 in e(x), which gives rise to the pion-nucleon sigma-term. According to the resulting “practical” DIS sum rules the first and the second moment of e(x) vanish, a situation analogue to that of the pure twist-3 distribution functi...
متن کامل0 Polarization in Hadronic Λ Hyperon Production and Twist - 3 Quark Distribution
Polarization of the Λ hyperon produced with a large transverse momentum in the unpolarized nucleon-nucleon collision is analyzed in the framework of QCD factorization. We focus on the mechanism in which the soft-gluon component of the chiral-odd spin-independent twist-3 quark distribution EF (x, x) becomes a source of the polarized quark fragmenting into the polarized Λ. Our simple model estima...
متن کاملThe chirally-odd twist-3 distribution e(x)
Properties of the nucleon twist-3 distribution function ea(x) are reviewed. It is emphasized that the QCD equations of motion imply the existence of a δ-function at x = 0 in ea(x), which gives rise to the pion-nucleon sigma-term. According to the resulting “practical” DIS sum rules the first and the second moment of ea(x) vanish, a situation analogue to that of the pure twist-3 distribution fun...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2001
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.64.034019