منابع مشابه
Azimuthal and spin asymmetries in DIS
In these lectures I want to discuss how the structure functions in deep inelastic scattering relate to quark and gluon correlation functions. In particular we will consider the issue of intrinsic transverse momenta of quarks, which becomes important in processes like 1-particle inclusive leptoproduction. Some examples of cross sections and asymmetries, in particular in polarized scattering proc...
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where p(c,d)⊥ and y(c,d) are, respectively, the transverse momenta and the rapidities of the outgoing hadrons and χ is the azimuthal angle, as defined in figure 1. Moreover a complete QCD study has been recently carried out for the corresponding observable in DIS processes.2 From an experimental point of view, the azimuthal correlation in pion-pair production in hadronic collision was one of th...
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We investigate the azimuthal distribution of quark-antiquark jets in DIS diffractive dissociation with large transverse momentum. In this kinematical region the matrix element is expressed in terms of the gluon structure function. For the transverse part of the cross section we find a cos(2φ)-distribution with the maximum at φ = ±π/2, i.e. the jets prefer a direction perpendicular to the electr...
متن کاملTwo Particle Azimuthal Correlation Measurements in PHENIX
Two particle azimuthal correlation functions are presented for charged hadrons produced in Au + Au collisions at RHIC (√ s NN = 200 GeV). The correlation functions indicate sizeable asymmetries and anisotropies. The trend of the asymmetries is compatible with the presence of emission patterns associated with mini-jets. The magnitude and the trend of the differential anisotropies v 2 (p T) and v...
متن کاملAzimuthal asymmetry in electro-production of neutral pions in semi-inclusive DIS
Recently HERMES has observed an azimuthal asymmetry AUL in electro-production of neutral pions in semi-inclusive deep-inelastic scattering of unpolarized positrons off longitudinally polarized protons. This asymmetry (like those observed in the production of charged pions) is well reproduced theoretically by using the non-perturbative calculation of the proton transversity distribution h1 in th...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2003
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(03)01829-2