LIGHT NEUTRAL MESONS PRODUCTION IN p-A COLLISIONS AT √s=27.5 GeV WITH THE NA60 EXPERIMENT

被引：4

作者：

Uras, Antonio ^{[1
]}

机构：

[1] Univ Lyon 1, IPNL, CNRS, IN2P3, F-69622 Villeurbanne, France

来源：

STRANGENESS IN QUARK MATTER 2011 | 2012年 / 5卷 / 02期

关键词：

TRANSITION FORM-FACTORS; DECAYS;

D O I：

10.5506/APhysPolBSupp.5.465

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The NA60 experiment has studied low-mass muon pair production in proton-nucleus (p-A) collisions with a system of Be, Cu, In, W, Pb and U targets using a 400 GeV/c proton beam at the CERN SPS. Thanks to the collected data sample of 180,000 low-mass muon pairs, the most precise measurement currently available was performed for the electromagnetic transition form factors of the eta and omega mesons. The rho-line shape was quantitatively investigated, and its effective temperature measured for the first time in elementary collisions. The transverse momentum spectra for the rho/omega and phi mesons have been studied in the full p(T) range accessible, up to 2 GeV/c. The cross section ratios sigma(rho)/sigma(omega) and sigma(phi)/sigma(omega) have been considered in full p(T) as a function of the size of the production target. The nuclear dependence of the production cross sections of the 71, w and 0 mesons has finally been studied in terms of the power law sigma(pA) proportional to A(alpha), where the a parameter has been found to increase as a function of p(T).

引用

页码：465 / 470

页数：6

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