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Dilepton anisotropy from $p + Be$ and $Ca + Ca$ collisions at BEVALAC energies | | E.L. Bratkovskaya
; W. Cassing
; U. Mosel
; | | Date: |
12 Dec 1995 | | Journal: | Phys.Lett. B376 (1996) 12-18 | | Subject: | nucl-th | | Affiliation: | Giessen Univ. & JINR, Dubna), W. Cassing and U. Mosel (Giessen Univ. | | Abstract: | A full calculation of lepton-pair angular characteristics is carried out for $e^+e^-$ pairs created in $p + Be$ and $Ca + Ca$ collisions from 1.0 to 2.1 GeV/A. It is demonstrated that the dilepton decay anisotropy depends sensitively on the different sources and may be used for their disentangling. Due to the dominance of the $eta$-and $Delta$-Dalitz decays and only a small anisotropy coefficient for $pi^+pi^-$ annihilation, the expected anisotropy coefficients show a decrease with invariant mass of the dilepton pair and change only moderately when comparing $p + Be$ and $Ca + Ca$ reactions at the same bombarding energy. | | Source: | arXiv, nucl-th/9601018 | | Services: | Forum | Review | PDF | Favorites | |
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