Search

Fiducial production cross-section measurements of Standard Model processes, in principle, provide constraints on new physics scenarios via a comparison of the predicted Standard Model cross-section and the observed cross-section. This approach received significant attention in recent years, both from direct constraints on specific models and the interpretation of measurements in the view of effective field theories. A generic problem in the reinterpretation of Standard Model measurements is the corrections application of to data to account for detector effects. These corrections inherently assume the Standard Model to be valid, thus implying a model bias of the final result. In this work, we study the size of this bias by studying several new physics models and fiducial phase–space regions. The studies are based on fast detector simulations of a generic multi-purpose detector at the Large Hadron Collider. We conclude that the model bias in the associated reinterpretations is negligible only in specific cases, however, typically on the same level as systematic uncertainties of the available measurements. [ABSTRACT FROM AUTHOR]

The measurement of the transverse momentum of W bosons in hadron collisions provides not only an important test of quantum chromodynamic (QCD) calculations, but also is a crucial input for the precision measurement of the W boson mass. While the measurement of the Z boson transverse momentum is experimentally well under control, the available unfolding techniques for the W boson final states lead generically to relatively large uncertainties. In this paper, we present a new methodology to estimate the W boson transverse momentum spectrum, significantly improving the systematic uncertainties of current approaches. [ABSTRACT FROM AUTHOR]

This review summarizes results on the production cross-section measurements of electroweak boson pairs (WW, WZ, ZZ, Wγ and Zγ) at the Large Hadron Collider (LHC) in pp collisions at a center-of-mass energy of . The two general-purpose detectors at the LHC, ATLAS and CMS recorded an integrated luminosity of ≈5 -1 in 2011, which offered the possibility to study the properties of diboson production to high precision. These measurements test predictions of the Standard Model (SM) in a new energy regime and are crucial for the understanding and the measurement of the SM Higgs boson and other new particles. In this review, special emphasis is drawn on the combination of results from both experiments and a common interpretation with respect to state-of-the-art SM predictions. [ABSTRACT FROM AUTHOR]