Low mass dimuon production in p-A collisions at √s=27.5 GeV with NA60

被引：4

作者：

Uras, A. ^{[1
]}

机构：

[1] Ist Nazl Fis Nucl, Cagliari, Italy

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2011年 / 38卷 / 12期

关键词：

TRANSITION FORM-FACTORS; MESON PRODUCTION; DECAYS;

D O I：

10.1088/0954-3899/38/12/124180

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：

The NA60 experiment has studied low-mass muon pair production in proton-nucleus collisions with a system of Be, Cu, In, W, Pb and U targets using a 400 GeV/c proton beam at the CERN SPS. The mass spectrum is well described by the superposition of the two-body and Dalitz decays of the light neutral mesons eta, rho, omega, eta', and phi. A new high-precision measurement of the electromagnetic transition form factors of the eta and omega mesons is presented, complemented with a measurement of the temperature parameter of the rho meson in cold nuclear matter. The p(T) spectra for the omega and phi mesons are extracted in the full p(T) range accessible, up to p(T) = 2 GeV/c. The nuclear dependence of the production cross sections for the eta, omega and phi mesons has been investigated in terms of the power law sigma(pA) proportional to A(alpha), and the alpha parameter was studied as a function of p(T).

引用

页数：4

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