Search for quark compositeness with the dijet centrality ratio in pp collisions at √s=7TeV

Nenhuma Miniatura disponível

Data

2010-12-20

Orientador

Coorientador

Pós-graduação

Curso de graduação

Título da Revista

ISSN da Revista

Título de Volume

Editor

Tipo

Artigo

Direito de acesso

Resumo

A search for quark compositeness in the form of quark contact interactions, based on hadronic jet pairs (dijets) produced in proton-proton collisions at √s=7TeV, is described. The data sample of the study corresponds to an integrated luminosity of 2.9pb⊃-1 collected with the CMS detector at the LHC. The dijet centrality ratio, which quantifies the angular distribution of the dijets, is measured as a function of the invariant mass of the dijet system and is found to agree with the predictions of the standard model. A statistical analysis of the data provides a lower limit on the energy scale of quark contact interactions. The sensitivity of the analysis is such that the expected limit is 2.9 TeV; because the observed value of the centrality ratio at high invariant mass is below the expectation, the observed limit is 4.0 TeV at the 95% confidence level. © 2010 CERN, for the CMS Collaboration.

Descrição

Palavras-chave

Idioma

Inglês

Como citar

Physical Review Letters, v. 105, n. 26, 2010.

Itens relacionados

Financiadores