Estimations of T-odd distribution and fragmentation functions
نویسندگان
چکیده
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 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...
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 کاملModelling distribution functions and fragmentation functions
We present examples for the calculation of the distribution and fragmentation functions using the representation in terms of non-local matrix elements of quark field operators. As specific examples, we use a simple spectator model to estimate the leading twist quark distribution functions and the fragmentation functions for a quark into a nucleon or a pion.
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: Nuclear Physics B - Proceedings Supplements
سال: 1999
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(99)00806-3