Inclusive and semi-inclusive polarized DIS data revisited
نویسندگان
چکیده
منابع مشابه
Weak interactions in polarized semi - inclusive DIS
We calculate, within pQCD parton model at leading orders, the expression of the polarization P of spin 1/2 hadrons (typically Λ baryons), produced in polarized semi-inclusive DIS in all possible cases in which weak interactions are involved. We discuss how to gather new information on fragmentation and distribution functions and give numerical estimates in the cases for which data are or will s...
متن کاملSemi-inclusive DIS: Factorization
There has been considerable experimental and theoretical interest in semi-inclusive hadron production in deep inelastic scattering (SIDIS) processes. For example, by studying the polarized and unpolarized SIDIS, one will be able to identify the sea quark distribution and polarization in nucleon, and the experimental results from the HERMES collaboration have revealed nontrivial sea structure in...
متن کاملFlavor asymmetry of polarized antiquark distributions and semi-inclusive DIS
The 1/Nc–expansion of QCD suggests large flavor asymmetries of the polarized antiquark distributions in the nucleon. This is confirmed by model calculations in the large–Nc limit (chiral quark–soliton model), which give sizable results for ∆ū(x)−∆d̄(x) and ∆ū(x)+∆d̄(x)−2∆s̄(x). We compute the contributions of these flavor asymmetries to the spin asymmetries in hadron production in semi-inclusive d...
متن کاملTransverse Λ Polarization in Semi-inclusive Dis
Extending a previous description of Λ and Λ̄ polarization in unpolarized p -p interactions, within a pQCD factorization scheme with new polarizing fragmentation functions, we give predictions for the transverse polarization of Λ’s and Λ̄’s in semi-inclusive DIS, both with neutral and charged currents. Comparison with existing data is not yet significant, but more experimental results are expected...
متن کاملTwo-Photon Exchange in (Semi-)Inclusive DIS
In this note1 we consider effects of a Two-Photon Exchange (TPE) in inclusive DIS and semi-inclusive DIS (SIDIS). In particular, transverse single spin asymmetries are generated in inclusive DIS if more than one photon is exchanged between the lepton and the hadron. We briefly summarize the TPE in DIS in the parton model and extend our approach to SIDIS, where a new leading twist sin(2φ) contri...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2000
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.62.094025