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Incorporating all recent theoretical advances, we resum soft-gluon corrections to the total $t\bar t$ cross-section at hadron colliders at the next-to-next-to-leading logarithmic (NNLL) order. We perform the resummation in the well…

High Energy Physics - Phenomenology · Physics 2015-06-03 Matteo Cacciari , Michal Czakon , Michelangelo L. Mangano , Alexander Mitov , Paolo Nason

We present results for the next-to-leading order QCD corrections to the production and semi-leptonic decays of a top quark pair in hadron collisions, retaining all spin correlations. To evaluate the virtual corrections, we employ…

High Energy Physics - Phenomenology · Physics 2009-11-18 Kirill Melnikov , Markus Schulze

A search for production of the supersymmetric partners of the top quark, top squarks, is presented. The search is based on proton-proton collision events containing multiple jets, no leptons, and large transverse momentum imbalance. The…

High Energy Physics - Experiment · Physics 2021-09-15 CMS Collaboration

We use a recent approach to soft-gluon resummation based on effective field theory to implement soft-gluon resummation at NNNLL order for slepton-pair production in SUSY extensions of the Standard Model. This approach resums large…

High Energy Physics - Phenomenology · Physics 2012-08-06 Alessandro Broggio , Matthias Neubert , Leonardo Vernazza

25 years after the top quark's discovery, the Large Hadron Collider at CERN produces proton-proton collision data on unprecedented scales at unprecedented energies - and has heralded an era of top-quark precision measurements. The…

High Energy Physics - Experiment · Physics 2020-08-24 Knut Zoch

We calculate direct gaugino pair production at hadron colliders at next-to-leading order of perturbative QCD, resumming simultaneously large logarithms in the small transverse-momentum and threshold regions to next-to-leading logarithmic…

High Energy Physics - Phenomenology · Physics 2015-05-27 J. Debove , B. Fuks , M. Klasen

We present a new approach to the realization of hard fixed-order corrections in predictions for the processes probed in high energy colliding hadron beam devices, with some emphasis on the LHC and the future FCC devices. We show that the…

High Energy Physics - Phenomenology · Physics 2016-06-24 B. F. L. Ward

We present the computation of next-to-leading order (NLO) QCD corrections to di-photon production in association with two or three hard jets in pp collisions at a center-of-mass energy of 8 TeV. The inclusion of NLO corrections is shown to…

High Energy Physics - Phenomenology · Physics 2015-06-18 Simon Badger , Alberto Guffanti , Valery Yundin

For the first time, differential cross sections for the production of W-bosons in conjunction with up to three jets, computed at next-to leading order in QCD and including parton shower corrections, are presented and compared to recent…

High Energy Physics - Phenomenology · Physics 2013-02-14 Stefan Hoeche , Frank Krauss , Marek Schonherr , Frank Siegert

We emphasise that charged slepton pairs produced via vector-boson fusion along with two high-mass, high-$p_T$ forward/backward jets (in two opposite hemispheres) can have a higher production cross-section for heavy slepton masses than that…

High Energy Physics - Phenomenology · Physics 2009-11-10 Debajyoti Choudhury , Anindya Datta , Katri Huitu , Partha Konar , Stefano Moretti , Biswarup Mukhopadhyaya

We have determined the theoretical predictions for the cross-sections of squark and gluino production at $\ppb$ and $pp$ colliders (Tevatron and LHC) in next-to-leading order of supersymmetric QCD. By reducing the dependence on the…

High Energy Physics - Phenomenology · Physics 2011-07-19 W. Beenakker , R. H"opker , M. Spira , P. M. Zerwas

In this article, we investigate the potential of low-mass lepton pair production in proton-ion collisions at the LHC to constrain nuclear modifications of parton densities. Similarly to prompt photon production, the transverse momentum…

High Energy Physics - Phenomenology · Physics 2015-06-18 M. Brandt , M. Klasen , F. König

We present a detailed phenomenological analysis of single-inclusive hadron production at the CERN-LHC in both proton-proton and proton-lead collisions. First data from the LHC experiments on charged hadron spectra are compared to…

High Energy Physics - Phenomenology · Physics 2014-11-21 M. Stratmann , R. Sassot , P. Zurita

From the very early days of Particle Physics, both experimental and theoretical studies on proton-proton collisions had occupied the center-stage of attention for very simple and obvious reasons. And this intense interest seems now to be at…

High Energy Physics - Phenomenology · Physics 2012-01-23 P. Guptaroy , Goutam Sau , S. Bhattacharyya

We update our extraction of parton-to-charged hadron fragmentation functions at next-to-leading order accuracy in QCD, focusing on the wealth of data collected at the Large Hadron Collider over the past decade. We obtain an accurate…

High Energy Physics - Phenomenology · Physics 2023-11-30 Ignacio Borsa , Daniel de Florian , Rodolfo Sassot , Marco Stratmann

The hadroproduction of lepton pairs with mass $Q$ and finite transverse momentum $Q_T$ is dominated by quark-gluon scattering in the region $Q_T > Q/2$. This feature provides a new independent method for constraining the gluon density with…

High Energy Physics - Phenomenology · Physics 2007-05-23 E. L. Berger , M. Klasen

We present a complete next-to-leading order QCD calculation for single-inclusive large-pT hadron production in longitudinally polarized lepton-nucleon collisions, consistently including ``direct'' and ``resolved'' photon contributions. This…

High Energy Physics - Phenomenology · Physics 2009-11-10 B. Jager , M. Stratmann , W. Vogelsang

We compute the next-to-next-to-leading order (NNLO) QCD correction to the total cross-section for the reaction gg \to t\bar t + X. Together with the partonic channels we computed previously, the result derived in this letter completes the…

High Energy Physics - Phenomenology · Physics 2013-08-06 Michal Czakon , Paul Fiedler , Alexander Mitov

In R-parity conserving supersymmetric (SUSY) models, sleptons are produced in pairs at hadron colliders through neutral and charged electroweak currents. We demonstrate that the polarization of the initial hadron beams allows for a direct…

High Energy Physics - Phenomenology · Physics 2009-11-11 M. Klasen

We present an implementation for slepton pair production at hadron colliders in the POWHEG BOX, a framework for combining next-to-leading order QCD calculations with parton-shower Monte-Carlo programs. Our code provides a SUSY Les Houches…

High Energy Physics - Phenomenology · Physics 2015-06-11 Barbara Jager , Andreas von Manteuffel , Stephan Thier
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