e+ e- pair production from γA reactions -: art. no. 044614

被引：111

作者：

Effenberger, M ^{[1
]}

Bratkovskaya, EL ^{[1
]}

Mosel, U ^{[1
]}

机构：

[1] Univ Giessen, Inst Theoret Phys, D-35392 Giessen, Germany

来源：

PHYSICAL REVIEW C | 1999年 / 60卷 / 04期

关键词：

D O I：

10.1103/PhysRevC.60.044614

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We present a calculation of e(+)e(-) production in gamma A reactions at MAMI and TJNAF energies within a semiclassical Boltzmann-Uehling-Uhlenbeck transport model. Dilepton invariant mass spectra for gamma C, gamma Ca, and gamma Pb are calculated at 0.8, 1.5, and 2.2 GeV. We focus on observable effects of medium modifications of the rho and omega mesons. The in-medium widths of these mesons are taken into account in a dynamical, consistent way. We discuss the transport theoretical treatment of broad resonances. [S0556-2813(99)05609-5].

引用

页数：14

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