Search for pair production of light scalar top quarks in p(p)over-bar collisions at √s=1.8 TeV -: art. no. 011801
PHYSICAL REVIEW LETTERS 93:1 (2004) ARTN 011801
Observation of diffractively produced W and Z bosons in p̄p collisions at √s = 1800 GeV
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 574:3-4 (2003) 169-179
Abstract:
Using the DØ detector, we have observed events produced in p̄p collisions that contain W or Z bosons in conjunction with very little energy deposition ("rapidity gaps") in large forward regions of the detector. The fraction of W boson events with a rapidity gap (a signature for diffraction) is 0.89±0.170.19%, and the probability that the non-diffractive background fluctuated to yield the observed diffractive signal is 3 × 10-14, corresponding to a significance of 7.5σ. The Z boson sample has a gap fraction of 1.44±0.520.61% with a significance of 4.4σ. The diffractive events have very similar properties to the more common non-diffractive component. © 2003 Elsevier B.V. All rights reserved.Search for large extra dimensions in the monojet + ET channel with the DØ detector
Physical Review Letters 90:25 I (2003) 2518021-2518026
Abstract:
The article discussed about the large extra dimensions in the monojet channel. The confidence-level lower limits, imposed on the fundamental Planck scale between 0.6 and 1.0 TeV, was 95%. The lower limits were found to be depended on the number of extra dimensions. The resultant limits were complimentary to those obtained in the single photon channel.Search for large extra dimensions in the monojet+E(T) channel with the DØ detector.
Phys Rev Lett 90:25 Pt 1 (2003) 251802
Abstract:
We present a search for large extra dimensions (ED) in pp collisions at a center-of-mass energy of 1.8 TeV using data collected by the DØ detector at the Fermilab Tevatron in 1994-1996. Data corresponding to 78.8+/-3.9 pb(-1) are examined for events with large missing transverse energy, one high-p(T) jet, and no isolated muons. There is no excess observed beyond expectation from the standard model, and we place lower limits on the fundamental Planck scale of 1.0 and 0.6 TeV for 2 and 7 ED, respectively.t(t)over-bar production cross section in p(p)over-bar collisions at √s=1.8 TeV -: art. no. 012004
PHYSICAL REVIEW D 67:1 (2003) ARTN 012004