# ICHEP2012

4-11 July 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

## Transverse Energy Energy Correlations in Next-to-Leading Order in alpha_s at the LHC

5 Jul 2012, 14:15
15m
Room 219 (Melbourne Convention and Exhibition Centre)

### Room 219

#### Melbourne Convention and Exhibition Centre

Melbourne Australia
Parallel Sessions Track 6. QCD, Jets, Parton Distributions

### Speaker

Prof. Ahmed Ali (DESY (DE))

### Description

We compute the transverse energy-energy correlation (EEC) and its asymmetry (AEEC) in next-to-leading order (NLO) in $\alpha_s$ in proton-proton collisions at the LHC with the center-of-mass energy $E_{\rm c.m.}=7$ TeV. We show that the transverse EEC and the AEEC distributions are insensitive to the factorization- and renormalization scales, the underlying minimum bias events, and the structure functions. Hence they can be used to precisely test QCD in hadron colliders and determine $\alpha_s$. We illustrate this technique by defining jets using the anti-$k_T$ jet algorithm and an event selection procedure typically used in the analysis of jets at the LHC and show the $\alpha_s$-dependence of the transverse EEC and the AEEC in the range $0.11 \leq \alpha_s(M_Z) \leq 0.13$.

### Primary author

Prof. Ahmed Ali (DESY (DE))

### Co-authors

Prof. Fernando Barreiro (UAM, Madrid) Dr Wei Wang (DESY, Hamburg)

 Slides