Artigo
Search for quark compositeness in dijet angular distributions from pp collisions at root s=7 TeV
Fecha
2012-05-01Registro en:
Journal of High Energy Physics. New York: Springer, n. 5, p. 29, 2012.
1029-8479
10.1007/JHEP05(2012)055
WOS:000305236000055
WOS000305236000055.pdf
Autor
Yerevan Phys Inst
Inst Hochenergiephys OeAW
Natl Ctr Particle & High Energy Phys
Vrije Univ Brussel
Univ Libre Brussels
Univ Ghent
Catholic Univ Louvain
Univ Mons
Centro Brasileiro de Pesquisas Físicas (CBPF)
Universidade do Estado do Rio de Janeiro (UERJ)
Univ Antwerp
Universidade Estadual Paulista (Unesp)
Bulgarian Acad Sci
Univ Sofia
Inst High Energy Phys
Peking Univ
Universidad de los Andes
Tech Univ Split
Univ Split
Rudjer Boskovic Inst
Univ Cyprus
Charles Univ Prague
Egyptian Network High Energy Phys
NICPB
Univ Helsinki
Helsinki Inst Phys
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IN2P3 CNRS
CEA Saclay
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Ctr Calcul
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Tbilisi State Univ
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DESY
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KFKI Res Inst Particle & Nucl Phys
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Univ Bologna
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Resumen
A search for quark compositeness using dijet angular distributions from pp collisions at root s = 7TeV is presented. The search has been carried out using a data sample corresponding to an integrated luminosity of 2 : 2 fb(-1), recorded by the CMS experiment at the LHC. Normalized dijet angular distributions have been measured for dijet invariant masses from 0.4TeV to above 3TeV and compared with a variety of contact interaction models, including those which take into account the effects of next-to-leading-order QCD corrections. The data are found to be in agreement with the predictions of perturbative QCD, and lower limits are obtained on the contact interaction scale, ranging from 7.5 up to 14.5TeV at 95% confidence level.