First evidence for WW and WZ diboson production with semi-leptonic decays at a Hadron Collider
- Princeton Univ., NJ (United States)
Presented is a measurement of the simultaneous production of a W± boson in association with a second weak boson (W± or Z0) in p$$\bar{p}$$ collisions at √s = 1.96 TeV. Events are consider with one electron or one muon, missing transverse energy, and at least two hadronic jets. The data were collected by the D0 detector in Run IIa of the Tevatron accelerator and correspond to 1.07 fb-1 of integrated luminosity for each of the two channels (WW/WZ → evq$$\bar{q}$$ and WW/WZ → μvq$$\bar{q}$$). The cross section for WW + WZ production is measured to be 20.2 ± 2.5(stat) ± 3.6(sys) ± 1.2(lum) pb with a Gaussian significance of 4.4 standard deviations above the background-only scenario. This measurement is consistent with the Standard Model prediction and represents the first direct evidence for WW and WZ production with semi-leptonic decays at a hadron collider.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 950511
- Report Number(s):
- FERMILAB-THESIS-2009-05; FERMILAB-PUB-08-457-E; TRN: US0902004
- Country of Publication:
- United States
- Language:
- English
Similar Records
Evidence of WW+WZ production with lepton + jets final states in p anti-p collisions at s**(1/2) = 1.96-TeV
Search for WW and WZ production in lepton, neutrino plus jets final states at CDF Run II and Silicon module production and detector control system for the ATLAS SemiConductor Tracker