منابع مشابه
T-odd fragmentation functions
We discuss the properties of fragmentation functions arising from the interference of two leading hadrons produced inside the same jet in the current fragmentation region of a hard process. For the case of semi-inclusive Deep Inelastic Scattering (DIS), a proper folding of the cross section, integrated over the azimuthal position of the detected hadrons, produces a factorized form that allows f...
متن کاملSum rules for the T-odd fragmentation functions
The conservation of the intrinsic transverse momentum during parton fragmentation imposes non-trivial constraints on T-odd fragmentation functions. These significantly enhance the differences between the favoured and unfavoured fragmentation functions, which could be relevant to understand the azimuthal asymmetries of charged pion production observed recently by the HERMES collaboration.
متن کاملChiral-odd Fragmentation Functions in Single Pion Inclusive Electroproduction
We consider a sub-leading twist chiral-odd pion fragmentation function and explore its contribution in single pion semi-inclusive electroproduction. We evaluate the single beam-spin azimuthal asymmetry ALU and the double spin asymmetry ALT in polarized electroproduction of pions from an unpolarized and transversely polarized nucleon respectively. The beam asymmetry is expressed as the product o...
متن کاملEstimates of T-odd distribution and fragmentation functions
Distribution and fragmentation functions account for the soft parts of a scattering process in which quarks are produced from the initial hadrons, and final hadrons are produced from quarks resulting from the elementary hard scattering. Leading order distribution and fragmentation functions have a direct interpretation in terms of probability densities (see Ref. [ 2] for more details and pictur...
متن کاملSpin-dependent, interference and T−odd fragmentation and fracture functions
Fracture functions, originally suggested to describe the production of diffractive and leading hadrons in semi-inclusive DIS, may be also applied at fixed target energies. They may also include interference and final state interaction, providing a source for azimuthal asymmetries at HERMES and (especially) Λ polarization at NOMAD. The recent papers by Brodsky, Hwang and Schmidt, and by Gluck an...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics A
سال: 2019
ISSN: 0217-751X,1793-656X
DOI: 10.1142/s0217751x19501446