Ballardini, MarioMarioBallardiniFINELLI, FABIOFABIOFINELLIPAOLETTI, DANIELADANIELAPAOLETTI2020-04-022020-04-0220151475-7516http://hdl.handle.net/20.500.12386/23788We consider the impact of a stochastic background of primordial magnetic fields with non-vanishing helicity on CMB anisotropies in temperature and polarization. We compute the exact expressions for the scalar, vector and tensor part of the energy-momentum tensor including the helical contribution, by assuming a power-law dependence for the spectra and a comoving cutoff which mimics the damping due to viscosity. We also compute the parity-odd correlator between the helical and non-helical contribution which generate the TB and EB cross-correlation in the CMB pattern. We finally show the impact of including the helical term on the power spectra of CMB anisotropies up to multipoles with l ~ Script O(10<SUP>3</SUP>).ELETTRONICOenArticle10.1088/1475-7516/2015/10/0312-s2.0-84946706335000365804000032https://iopscience.iop.org/article/10.1088/1475-7516/2015/10/0312015JCAP...10..031BFIS/05 - ASTRONOMIA E ASTROFISICA