[PDF] Top 20 Recent COMPASS results on the nucleon longitudinal spin structure and QCD fits

... Four structure functions are used to parametrise the lepton-nucleon deep inelastic scattering (lN → l X) ...and nucleon target, one can measure a double spin asymmetry of cross-sections and ... See full document

... global QCD analysis to extract the helicity distributions of quarks and ...from COMPASS only, it is also possible to calculate the non- singlet structure function, which allows an verification of the ... See full document

... the spin structure of the ...specified spin states of the virtual photon, target proton, produced vector meson and recoil ...polarised nucleon target, after summing up over initial and final ... See full document

... from recent ex- perimental data at the next-to-leading order (NLO) approximation in the fixed-flavor number ...our results with experimental data such as very recent COMPASS ...new ... See full document

... The COMPASS experiment at CERN uses hadron and lepton beams for nu- cleon structure ...The COMPASS large polarised target gives access to several momentum-dependent single- spin asymmetries ... See full document

... baryons. Results are by the BMW [1] and the ETM collaborations, extrapolated to the continuum limit and by the PACS-CS collaboration at one lattice spacing ...3/2 spin charmed baryons using twisted mass ... See full document

... the results on the azimuthal asymmetries measured is presented, with particular focus on the most recent measurements from the data collected in 2007 and 2010 with the pro- ton ...These results ... See full document

... total longitudinal spin pro- jection of the nucleon, 1/2, is distributed among its constituents, quarks and ...the recent results on the quark and gluon helicities obtained by ... See full document

... both longitudinal and transverse ...successful results, the COMPASS collaboration is performing a new spin physics program [2], approved in December 2010 and started in ...the nucleon ... See full document

... for the favored and unfavored quark FF into pions obtained from the fit of the pion multiplicities are shown in Fig.6. The statistical error band was obtained with a replica method, varying the data points within their ... See full document

... the spin structure of the proton ...experimental results showed that the contribution from quark/antiquark spin to nucleon spin is sur- prisingly smaller than expected, leading ... See full document

... ciency for π is high, above 90% for p < 30 GeV/c, while the misidentification probability is low. For kaon the efficiency is above 90% in the whole momentum range used. Since there are much more pro- duced pions than ... See full document

... simultaneous fits to the two- point correlation function, and axial and vector effective ...fit results with a frequentist p-value greater than ...unconstrained fits under varying regions of ... See full document

... Collinear QCD factorization has allowed us to calculate neutrino production of D− mesons in terms of GPDs. Gluon and both chiral-odd and chiral-even quark GPDs contribute to the amplitude for dif- ferent ... See full document

... the nucleon, it has been studied also by the QCDSF / UKQCD Collaborations [11], combining the electromagnetic form factor of the pion with its tensor form ...their results with the lattice ones, they used a ... See full document

... the collective hydrodynamical phenomena [7, 8]. The many-body system, such as the QGP, may be described by hydrodynamics when the mean free path of the constituents are much smaller than the size of the system. The ... See full document

... configurations are generated with the stout-smeared O (a) improved Wilson quark action and Iwasaki gauge action at β = 1.82, which corresponds to the lattice spacing of 0.085 fm. The pion mass at the simulation point is ... See full document

... transverse spin-odd fractured functions involving quantum diquark structures to the classification of transverse-spin odd distributions and fragmentation functions for quarks created by Mulders and ...the ... See full document

... Abstract. Nucleon-structure calculations of isovector vector- and axialvector-current form factors, transversity and scalar charge, and quark momentum and helicity fractions are reported from two ... See full document

... On the other hand, we have to refine our understanding of the underlying dynamics in low momentum exchange processes in hadronic collisions. The description of these effects rely on phenomenological models, whose ... See full document