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29 March 2024
 
  » arxiv » hep-ph/0103053

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Direct Signals for Large Extra Dimensions in the Production of Fermion Pairs at Linear Colliders
O. J. P. Eboli ; M. B. Magro ; P. Mathews ; P. G. Mercadante ;
Date 6 Mar 2001
Journal Phys.Rev. D64 (2001) 035005
Subject hep-ph
AffiliationIFUSP, Brazil), M. B. Magro (IFUSP, Brazil), P. Mathews (IFT, Brazil), P. G. Mercadante (IFUSP, Brazil
AbstractWe analyze the potentiality of the new generation of $e^+e^-$ linear colliders to search for large extra dimensions via the production of fermion pairs in association with Kaluza-Klein gravitons (G), i.e. $e^+e^- leftarrow far{f}G$. This process leads to a final state exhibiting a significant amount of missing energy in addition to acoplanar lepton or jet pairs. We study in detail this reaction using full tree level contibutions due to the graviton emission and the standard model backgrounds. After choosing the cuts to enhance the signal, we show that a linear collider with a center-of-mass energy of 500 GeV will be able to probe quantum gravity scales from 0.96(0.86) up to 4.1(3.3) TeV at 2(5)$sigma$ level, depending on the number of extra dimensions.
Source arXiv, hep-ph/0103053
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