2003/08/13 by D0 collaboration, V. M. Abazov, B. Abbott +98
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1016/j.physletb.2003.09.001
published as Phys.Lett.B574:169-179,2003 · 14 pages, 5 figures, submitted to PLB
arxiv created 2003/08/13 · openalex publication_date 2003/10/11 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
Using the D0 detector, we have observed events produced in pbar-p 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±0.190.17%, and the probability that the non-diffractive background fluctuated to yield the observed diffractive signal is 3 x 10-14, corresponding to a significance of 7.5 sigma. The Z boson sample has a gap fraction of 1.44 ±0.610.52%, with a significance of 4.4 sigma. The diffractive events have very similar properties to the more common non-diffractive component.