Search for branons at LEP
Physics Letters B 597,2 (2004) 145-154;
We search, in the context of extra-dimension scenarios, for the possible existence of brane fluctuations, called branons. Events with a single photon or a single Z-boson and missing energy and momentum collected with the U detector in e(+)e(-) collisions at centre-of-mass energies root2 = 189-209 GeV are analysed. No excess over the Standard Model expectations is found and a lower limit at 95% confidence level of 103 GeV is derived for the mass of branons, for a scenario with small brane tensions. Alternatively, under the assumption of a light branon, brane tensions below 180 GeV are excluded. (C) 2004 Published by Elsevier B.V.
monte-carlo program;; w-pair production;; e(+)e(-) collisions;; missing energy;; l3 experiment;; final-states;; bhabha scattering;; single-photon;; root-s;; dimensions
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