Outputs (9)

The simplest of them all: $$ t\overline{t}{W}^{\pm } $$ at NLO accuracy in QCD (2020)
Journal Article
Bevilacqua, G., Bi, H., Hartanto, H. B., Kraus, M., & Worek, M. (2020). The simplest of them all: $$ t\overline{t}{W}^{\pm } $$ at NLO accuracy in QCD. Journal of High Energy Physics, 2020(8), Article 043. https://doi.org/10.1007/jhep08%282020%29043

Recent measurements of the pp → ttW¯ ± process in multi-lepton final states, as performed by the ATLAS collaboration in the context of the Higgs boson studies in the ttH¯ channel, have shown discrepancies between theoretical predictions and experimen... Read More about The simplest of them all: $$ t\overline{t}{W}^{\pm } $$ at NLO accuracy in QCD.

Off-shell vs on-shell modelling of top quarks in photon associated production (2020)
Journal Article
Bevilacqua, G., Hartanto, H., Kraus, M., Weber, T., & Worek, M. (2020). Off-shell vs on-shell modelling of top quarks in photon associated production. Journal of High Energy Physics, 2020(3), Article 154. https://doi.org/10.1007/jhep03%282020%29154

We present a comparative study of various approaches for modelling of the e+veμ−v¯¯¯μbb¯¯γ final state in tt¯γ production at the LHC. Working at the NLO in QCD we compare the fully realistic description of the top quark decay chain with the one provi... Read More about Off-shell vs on-shell modelling of top quarks in photon associated production.

Towards constraining dark matter at the LHC: higher order QCD predictions for tt¯+ Z(Z → ν`ν¯`) (2019)
Journal Article
Bevilacqua, G., Hartanto, H., Kraus, M., Weber, T., & Worek, M. (2019). Towards constraining dark matter at the LHC: higher order QCD predictions for tt¯+ Z(Z → ν`ν¯`). Journal of High Energy Physics, 2019(11), https://doi.org/10.1007/jhep11%282019%29001

Triggered by ongoing dark matter searches in the top quark sector at the Large Hadron Collider we report on the calculation of the next-to-leading order QCD corrections to the Standard Model process pp → t t¯ + Z (Z → νℓ v¯¯¯ ℓ). This calculation is... Read More about Towards constraining dark matter at the LHC: higher order QCD predictions for tt¯+ Z(Z → ν`ν¯`).

A numerical evaluation of planar two-loop helicity amplitudes for a W-boson plus four partons (2019)
Journal Article
Hartanto, H. B., Badger, S., Brønnum-Hansen, C., & Peraro, T. (2019). A numerical evaluation of planar two-loop helicity amplitudes for a W-boson plus four partons. Journal of High Energy Physics, 2019(9), Article 119. https://doi.org/10.1007/jhep09%282019%29119

We present the first numerical results for the two-loop helicity amplitudes for the scattering of four partons and a W-boson in QCD. We use a finite field sampling method to reduce directly from Feynman diagrams to the coefficients of a set of master... Read More about A numerical evaluation of planar two-loop helicity amplitudes for a W-boson plus four partons.

Precise predictions for tt¯γ/tt¯ cross section ratios at the LHC (2019)
Journal Article
Bevilacqua, G., Hartanto, H., Kraus, M., Weber, T., & Worek, M. (2019). Precise predictions for tt¯γ/tt¯ cross section ratios at the LHC. Journal of High Energy Physics, 2019(1), Article 188. https://doi.org/10.1007/jhep01%282019%29188

With the goal of increasing the precision of NLO QCD predictions for the pp→tt¯γ process in the di-lepton top quark decay channel we present theoretical predictions for the R=σtt¯γ/σtt¯ cross section ratio. Results for the latter together with variou... Read More about Precise predictions for tt¯γ/tt¯ cross section ratios at the LHC.

Hard photons in hadroproduction of top quarks with realistic final states (2018)
Journal Article
Bevilacqua, G., Hartanto, H., Kraus, M., Weber, T., & Worek, M. (2018). Hard photons in hadroproduction of top quarks with realistic final states. Journal of High Energy Physics, 2018(10), Article 158. https://doi.org/10.1007/jhep10%282018%29158

We present a complete description of top quark pair production in association with a hard photon in the dilepton channel. Our calculation is accurate to NLO in QCD. It is based on matrix elements for e+νeμ−ν¯¯¯μbb¯¯γ production and includes all reson... Read More about Hard photons in hadroproduction of top quarks with realistic final states.

Top quark mass studies with tt¯j at the LHC (2018)
Journal Article
Bevilacqua, G., Hartanto, H., Kraus, M., Schulze, M., & Worek, M. (2018). Top quark mass studies with tt¯j at the LHC. Journal of High Energy Physics, 2018(03), Article 169. https://doi.org/10.1007/jhep03%282018%29169

A precise measurement of the top quark mass, a fundamental parameter of the Standard Model, is among the most important goals of top quark studies at the Large Hadron Collider. Apart from the standard methods, numerous new observables and reconstruct... Read More about Top quark mass studies with tt¯j at the LHC.

First Look at Two-Loop Five-Gluon Scattering in QCD (2018)
Journal Article
Badger, S., Brønnum-Hansen, C., Hartanto, H. B., & Peraro, T. (2018). First Look at Two-Loop Five-Gluon Scattering in QCD. Physical Review Letters, 120(9), Article 092001. https://doi.org/10.1103/physrevlett.120.092001

We compute the leading-color contributions to five-gluon scattering at two loops in massless QCD. The integrands of all independent helicity amplitudes are evaluated using d -dimensional generalized unitarity cuts and finite field reconstruction tech... Read More about First Look at Two-Loop Five-Gluon Scattering in QCD.

Off-shell ttj Production and Top-quark Mass Studies at the LHC (2017)
Journal Article
Bevilacqua, G., Hartanto, H., Kraus, M., Schulze, M., & Worek, M. (2017). Off-shell ttj Production and Top-quark Mass Studies at the LHC. Acta Physica Polonica B, 48(12), 2251-2260. https://doi.org/10.5506/aphyspolb.48.2251

Precision studies of the properties of the top quark represent a cornerstone of the LHC physics program. In this contribution, we focus on the production of tt pairs in association with one hard jet and, in particular, on its connection with precisio... Read More about Off-shell ttj Production and Top-quark Mass Studies at the LHC.