Search for Large Extra Spatial Dimensions in Dimuon Production with the D0 Detector

Abstract

We present the results of a search for the effects of large extra spatial dimensions in p p collisions at s p 1:96 TeV in events containing a pair of energetic muons. The data correspond to 246 pb ÿ1 of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron Collider. Good agreement with the expected background was found, yielding no evidence for large extra dimensions. We set 95% C.L. lower limits on the fundamental Planck scale between 0.85 and 1.27 TeV within several formalisms. These are the most stringent limits achieved in the dimuon channel to date.

An indirect measurement of the width of the w boson at the D0 experiment

“…This analysis looks for the cases where these resonances decay in the di-muon channel [68]. These resonant states are associated with gravitons propagating through new extra dimensions.…”

Probing new physics viapp→W+W−→lνjjat the CERN LHC

“…Taking the large extra dimensions (ADD) [9] as an example, searches have been performed on virtual-graviton channels at HERA [10,11], LEP [12][13][14][15][16][17], and the Tevatron [18,19]. The most stringent collider limits before the LHC were given by the Tevatron D0 through the dijet [20], diphoton, and dielectron channels [19], which excluded the ADD cutoff scale M s up to 1.3-2.1 TeV at a 95% C.L., for seven to two extra dimensions.…”

Higgs production in association with bottom quark pair at LHC

“…The direct searches for charged Higgs bosons are reported with the H ± → τ ν, tb channels [24][25][26]. The D0 and CDF Collaboration have presented a search for H → bb, produced in association with bottom quarks [27][28][29]. The theoretical constraints on the 2HDM parameters are reviewed with the vacuum stability, unitarity, electroweak precision measurements and flavour constraints [30].…”