TY  - JOUR
A1  - Chiesa, Mauro
A1  - Greiner, Nicolas
A1  - Schönherr, Marek
A1  - Tramontano, Francesco
T1  - Electroweak corrections to diphoton plus jets
JF  - Journal of High Energy Physics
N2  - We calculate the next-to-leading order electroweak corrections to the production of a photon pair in association with zero, one and two jets at the LHC. We use GoSam and Sherpa to obtain the results in a fully automated way. For a typical set of fiducial cuts the electroweak corrections lead to a modification of the total cross section of up to 3%, depending on the jet multiplicity. We find substantial contributions in differential distributions, leading to tens of per cent corrections for phase space regions within the reach of the LHC. Furthermore we investigate the importance of photon induced processes as well as subleading contributions. Photon induced processes are found to be negligible, subleading contributions can have a sizeable impact however they can be removed by appropriate phase space cuts.
KW  - NLO computations
Y1  - 2017
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-173512
IS  - 10
ER  - 
TY  - JOUR
A1  - Lindert, J. M.
A1  - Pozzorini, S.
A1  - Boughezal, R.
A1  - Campbell, J. M.
A1  - Denner, A.
A1  - Dittmaier, S.
A1  - Gehrmann-De Ridder, A.
A1  - Gehrmann, T.
A1  - Glover, N.
A1  - Huss, A.
A1  - Kallweit, S.
A1  - Maierhöfer, P.
A1  - Mangano, M. L.
A1  - Morgan, T. A.
A1  - Mück, A.
A1  - Petriello, F.
A1  - Salam, G. P.
A1  - Schönherr, M.
A1  - Williams, C.
T1  - Precise predictions for \(V+\)jets dark matter backgrounds
JF  - European Physical Journal C
N2  - High-energy jets recoiling against missing transverse energy (MET) are powerful probes of dark matter at the LHC. Searches based on large MET signatures require a precise control of the \({Z(ν\overline{ν})}+\) jet background in the signal region. This can be achieved by taking accurate data in control regions dominated by \(Z(ℓ^+ℓ^−)+\) jet, \(W(ℓν)+\) jet and \(γ+\) jet production, and extrapolating to the \({Z(ν\overline{ν})}+\) jet background by means of precise theoretical predictions. In this context, recent advances in perturbative calculations open the door to significant sensitivity improvements in dark matter searches. In this spirit, we present a combination of state-of-the-art calculations for all relevant \(V+\) jets processes, including throughout NNLO QCD corrections and NLO electroweak corrections supplemented by Sudakov logarithms at two loops. Predictions at parton level are provided together with detailed recommendations for their usage in experimental analyses based on the reweighting of Monte Carlo samples. Particular attention is devoted to the estimate of theoretical uncertainties in the framework of dark matter searches, where subtle aspects such as correlations across different \(V+\) jet processes play a key role. The anticipated theoretical uncertainty in the \({Z(ν\overline{ν})}+\) jet background is at the few percent level up to the TeV range.
KW  - Physics
KW  - High energy physics
KW  - High-energy jets
KW  - Dark matter
Y1  - 2017
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-172555
VL  - 77
ER  -