Browsing by Issue Date, starting with "2013-10-19"
Now showing 1 - 9 of 9
Results Per Page
Sort Options
- A inexistência do critério de viabilidade económica no recurso ao processo especial de revitalizaçãoPublication . Ferreira, João; Marques, Justino
- Movimento Associativo: Qual a dinâmica no financiamento das PMEs?Publication . Cardoso, Isabel; Peixoto, João
- As empresas portuguesas e a internacionalizaçãoPublication . Basílio, Nelson; Marques, Justino
- Planeamento fiscal e economia informalPublication . Rodrigues, João; Peixoto, João
- Reflexos no ano 2013, da alteração da taxa de IVA no setor da restauraçãoPublication . Leitão, Catarina; Peixoto, João
- A urgência de InternacionalizarPublication . Peixoto, Paula; Marques, Justino
- Contributos para o equilíbrio financeiro das empresas através de uma correta política de financiamento bancárioPublication . Guedes, Eusébio; Marques, Justino
- Os Mercados Financeiros e a Crise 2007-2012Publication . Bico, António; Marques, Justino
- Measurement of the ratio of the inclusive 3-jet cross section to the inclusive 2-jet cross section in pp collisions at $\sqrt{s}$ = 7 TeV and first determination of the strong coupling constant in the TeV rangePublication . CMS collaboration (2195 authors); Hollar, Jonathan; Nayak, Aruna; Calpas, Betty; Almeida, Nuno; Bargassa, Pedrame; David Tinoco Mendes, Andre; Faccioli, Pietro; Ferreira Parracho, Pedro Guilherme; Gallinaro, Michele; Rodrigues Antunes, Joao; Seixas, Joao; Varela, Joao; Vischia, Pietro; Lloret Iglesias, Lara; Musella, Pasquale; Silva, Pedro; Pela, Joao; Leonardo, NunoA measurement is presented of the ratio of the inclusive 3-jet cross section to the inclusive 2-jet cross section as a function of the average transverse momentum, , of the two leading jets in the event. The data sample was collected during 2011 at a proton-proton centre-of-mass energy of 7 TeV with the CMS detector at the LHC, corresponding to an integrated luminosity of 5.0 inverse femtobarns. The strong coupling constant at the scale of the Z boson mass is determined to be alphaS[MZ] = 0.1148 +/- 0.0014 (exp.) +/- 0.0018 (PDF) +/- 0.0050 (theory), by comparing the ratio in the range 0.42 < < 1.39 TeV to the predictions of perturbative QCD at next-to-leading order. This is the first determination of alphaS[MZ] from measurements at momentum scales beyond 0.6 TeV. The predicted ratio depends only indirectly on the evolution of the parton distribution functions of the proton such that this measurement also serves as a test of the evolution of the strong coupling constant. No deviation from the expected behaviour is observed.