Código de Conduta – Prevenção da introdução e dispersão de flora e fauna exótica invasora: agentes ambientais.

Código de Conduta – Prevenção da introdução e dispersão de flora e fauna exótica invasora: agentes ambientai

Código de conducta. Zoológicos, acuarios y especies exóticas invasoras en la Península Ibérica

Código de conducta. Zoológicos, acuarios y especies exóticas invasoras en la Península Ibéric

Guide to the alien and invasive species of rivers, lakes and estuaries in the Iberian Peninsula.

Guide to the alien and invasive species of rivers, lakes and estuaries in the Iberian Peninsula

Guía de las especies Exóticas e Invasoras de los Ríos, Lagos y Estuarios de la Península Ibérica.

Guía de las especies Exóticas e Invasoras de los Ríos, Lagos y Estuarios de la Península Ibérica

Guia das Espécies Exóticas e Invasoras dos Rios, Lagos e Estuários da Península Ibérica.

Guia das Espécies Exóticas e Invasoras dos Rios, Lagos e Estuários da Península Ibérica

Charged-particle multiplicities in pp interactions at root s=900 GeV measured with the ATLAS detector at the LHC ATLAS Collaboration

The first measurements from proton-proton collisions recorded with the ATLAS detector at the LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during collisions at a centre-of-mass energy of 900 GeV. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity, and the relationship between mean transverse momentum and charged-particle multiplicity are measured for events with at least one charged particle in the kinematic range vertical bar eta vertical bar 500 MeV. The measurements are compared to Monte Carlo models of proton-proton collisions and to results from other experiments at the same centre-of-mass energy. The charged-particle multiplicity per event and unit of pseudorapidity eta = 0 is measured to be 1.333 +/- 0.003(stat.) +/- 0.040(syst.), which is 5-15% higher than the Monte Carlo models predict. 2010 Published by Elsevier B.V