Measurements of $WW$ and $WZ$ production in $W$ + jets final states in $p\bar p$ collisions

Abstract
We study $WW$ and $WZ$ production with $ℓνqq\ (ℓ=e,μ)$ final states using data collected by the D0 detector at the Fermilab Tevatron Collider corresponding to $4.3  \text{fb}^{−1}$ of integrated luminosity from $p\bar p$ collisions at $\sqrt s=1.96  \text{TeV}$. Assuming the ratio between the production cross sections $σ(WW)$ and $σ(WZ)$ as predicted by the standard model, we measure the total $WV (V=W,Z)$ cross section to be $σ(WV)=19.6^{+3.2}_{−3.0}  \text{pb}$ and reject the background-only hypothesis at a level of 7.9 standard deviations. We also use $b$-jet discrimination to separate the $WZ$ component from the dominant $WW$ component. Simultaneously fitting $WW$ and $WZ$ contributions, we measure $σ(WW)=15.9^{+3.7}_{−3.2}  \text{pb}$ and $σ(WZ)=3.3^{+4.1}_{−3.3} \text{pb}$, which is consistent with the standard model predictions.
Description
Keywords
Cross section, Fermilab Tevatron collider;Finalstate, Integrated luminosity, Standard deviation, The standard model, Atomic physics, Physics, Tellurium compounds, Production cross section, Final state
Citation
Abazov, V. M., Abbott, B., Acharya, B. S., Adams, M., Adams, T., Alexeev, G. D., . . . Zivkovic, L. (2012). Measurements of $WW$ and $WZ$ production in $W$ + jets final states in $p\bar p$ collisions. Physical Review Letters, 108(18), 181803. http://dx.doi.org/10.1103/PhysRevLett.108.181803
DOI
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Rights
© 2012 American Physical Society.
Type
Article