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e+ e- pairs from pi- A reactions

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arxiv nucl-th/9901039 v2 pith:6GF5D5TI submitted 1999-01-15 nucl-th

e+ e- pairs from pi- A reactions

classification nucl-th
keywords mesonproductionreactionsresultscalculatecalculationchannelscompare
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We calculate dilepton production for the reactions $\pi^-$C and $\pi^-$Pb at 1.3 GeV within a semi-classical BUU transport model and compare our results to a previously published calculation. We show that a modified treatment of the $\rho$-meson production and propagation gives substantially different results. We, furthermore, discuss uncertainties related to the electromagnetic decay of the $\rho$-meson and the elementary $\pi^- N \to e^+ e^- X$ channels.

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