# DPF 2011

8-13 August 2011
Rhode Island Convention Center
US/Eastern timezone

## Measurement of three-jet differential cross sections $\boldsymbol{d\sigma_{\text{3jet}} / dM_{\text{3jet}}}$ in $\boldsymbol{p\bar{p}}$ collisions at $\boldsymbol{\sqrt{s}=1.96}$ TeV

10 Aug 2011, 14:00
20m
551 A (Rhode Island Convention Center)

### 551 A

#### Rhode Island Convention Center

Parallel contribution Perturbative and non-Perturbative QCD

### Speaker

Lee Sawyer (College of Engineering and Science-Louisiana Technical Universi)

### Description

We present the first measurement of the inclusive three-jet differential cross section as a function of the invariant mass of the three jets with the largest transverse momenta in an event in $p\bar{p}$ collisions at $\sqrt{s}=1.96\, \mathrm{TeV}$. The measurement is made in different rapidity regions and for different jet transverse momentum requirements and is based on a data set corresponding to an integrated luminosity of $0.7\, \mathrm{fb}^{-1}$ collected with the D0 detector at the Fermilab Tevatron Collider. The results are used to test the three-jet matrix elements in perturbative QCD calculations at next-to-leading order in the strong coupling constant. The data allow discrimination between parametrizations of the parton distribution functions of the proton.

### Primary author

Lee Sawyer (College of Engineering and Science-Louisiana Technical Universi)

### Presentation Materials

 SawyerDPF2011MultijetXsecs.pdf SawyerDPF2011MultijetXsecs.pptx