Extraction of polarized gluon distributions from large-pT light hadron pair production
نویسندگان
چکیده
منابع مشابه
Polarized photoproduction of large-pT hadron pairs as a probe of the polarized gluon distribution
Production of large-pT hadron pairs by polarized photon on a longitudinally polarized proton towards probing the polarized gluon distribution is studied. Resolved photon contributions and the effect of changing the scales are taken into account. It is shown that production of pion pairs is not a good probe, but production of kaon pairs is a better one. The best probe is shown to be a proper com...
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In order to extract information about behavior of polarized gluons in the nucleon, charmed hadron productions, i.e. D meson and Λ+c baryon productions, are studied in polarized pp reactions at BNL-RHIC energy. For these processes, the spin correlation asymmetry ALL between the target proton and the produced charmed hadron, and its statistical sensitivity δALL are calculated as functions of tran...
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In order to extract the behavior and magnitude of the spin–dependent gluon distribution, we propose a semi–inclusive Λ+c production using unpolarized lepton beams and polarized proton targets. The correlation between the target proton spin and the spin of Λ+c produced in the target fragmentation region might be very effective for testing various models of polarized gluons. E–mail kochelev@thsun...
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Using the recently proposed ggη effective vertex, we investigate the production of η from gluon fusion in polarized pp collisions. We show that by measuring ALL in η ′ production, one can extract the polarized gluon distribution ∆G(x,Q) at Q ∼ 1GeV and in a wide range of x.
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The recent high precision SMC data on polarized μp scatterings have again confirmed that very little of the proton spin is carried by quarks. To unravel the mystery of the proton spin structure, it is quite important to know the behavior of the polarized gluon distribution. By using the positivity condition of distribution functions together with the unpolarized and polarized experimental data,...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2001
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(01)01122-4