Measurement of the $$W$$ + $$\geq$$ 1 Jet Cross-section in $$p\bar{p}$$ Collisions at $$\sqrt{s}$$ = 1.8-TeV
- Duke U.
We present a measurement of $$\sigma(W+\geq {1}$$ jet), the cross section for W + $$\geq 1$$ jet production, using $$W^\pm \to e^\pm\nu$$ events from 108 $$pb^{-1}$$ of $$p\bar{p}$$ collisions at a center of mass energy of 1.8 TeV. The data were collected using the Collider Detector at Fermilab (CDF) at the Fermilab Tevatron from 1992-1995 (Run 1). The experimental measurement of $$\sigma(W+\geq {1}$$ jet) is compared to next-to-leading-order QCD predictions generated using the DYRAD Monte Carlo program. We explore the sensitivity of $$\sigma(W+\geq {1}$$ jet)to differences in the jet defnition by using two different jet cone sizes (R = 0.4 and R = 0.7) and by varying the jet transverse energy threshold $$(E^{min}_T)$$ from 15 to 95 GeV. For 0.4 jet cones, the predictions of $$\sigma(W+\geq {1}$$ jet) agree well with the data, lying within one standard deviation of the measured values for $$E^{min}_T$$ > 25 GeV. For 0.7 cones, the theoretical predictions reproduce the data at low $$E^{min}_T$$ , but underestimate the data by about one standard deviation for $$E^{min}_T$$ > 35 GeV. Generally, data and theory agree to within 20% for both cone sizes over the entire range of $$E^{min}_T$$.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1421685
- Report Number(s):
- FERMILAB-THESIS-1998-07; UMI-99-17363; 483797
- Country of Publication:
- United States
- Language:
- English
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