ANISOTROPY OF DILEPTON EMISSION FROM NUCLEAR COLLISIONS

Attention is paid to studying the angular characteristics of e(+)e(-) pairs created in collisions with nuclear targets at intermediate and r elativistic energies. Arising due to general spin and angular momentum constraints, the dilepton anisotropy seems to be quite sensitive to t he contribution of different sources and may be used for disentangling these sources (or models) as well as an additional signature of a pos sible chiral symmetry restoration and phase transition of hadrons into the quark-gluon plasma. An anisotropy estimate for some dilepton sour ces is given and its relevance to the problems mentioned is discussed.