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The effect of threshold singularities induced by unstable particles on two-loop observables is investigated and it is shown how to cure them working in the complex-mass scheme. The impact on radiative corrections around thresholds is…

高能物理 - 唯象学 · 物理学 2008-11-26 S. Actis , G. Passarino , C. Sturm , S. Uccirati

We report a new calculation of the soft-gluon threshold resummation for the Higgs boson pair production in the dominant production mode -- gluon-gluon fusion -- up to the next-to-next-to-next-to-leading logarithmic (N$^3$LL) accuracy. After…

高能物理 - 唯象学 · 物理学 2023-02-13 A. H. Ajjath , Hua-Sheng Shao

The production of supersymmetric stop-antistop pairs at the Large Hadron Collider (LHC) is studied including corrections from soft-gluon resummation up to next-to-next-to-leading logarithmic (NNLL) accuracy in the Mellin-space approach.…

高能物理 - 唯象学 · 物理学 2016-05-31 Wim Beenakker , Christoph Borschensky , Raphael Heger , Michael Krämer , Anna Kulesza , Eric Laenen

We consider QCD radiative corrections to the production of W and Z bosons in hadron collisions. We present a fully exclusive calculation up to next-to-next-to-leading order (NNLO) in QCD perturbation theory. To perform this NNLO…

高能物理 - 唯象学 · 物理学 2009-09-02 S. Catani , L. Cieri , G. Ferrera , D. de Florian , M. Grazzini

We present the complete threshold enhanced predictions in QCD for the total cross section of gluino pair production at hadron colliders at next-to-next-to-leading order. Thanks to the computation of the required one-loop hard matching…

高能物理 - 唯象学 · 物理学 2012-11-26 Ulrich Langenfeld , Sven-Olaf Moch , Torsten Pfoh

We present new results for the complete two-loop corrections in the soft approximation for W and Z boson production at large transverse momentum. Analytical expressions for the NNLO approximate corrections are used to calculate transverse…

高能物理 - 唯象学 · 物理学 2011-09-14 Nikolaos Kidonakis , Richard J. Gonsalves

A Monte Carlo study of the polar and azimuthal angular distributions of the lepton pair arising from the decay of a $W$ or $Z$ boson produced at high transverse momentum in hadronic collisions is presented. In the absence of cuts on the…

高能物理 - 唯象学 · 物理学 2009-10-28 E. Mirkes , J. Ohnemus

In the framework of Color Glass Condensate, the pseudo-rapidity distributions of charged hadrons in pp and pA collisions at the LHC are studied with the UGD function from the GBW model. With a $\chi^{2}$ analysis of the CMS data in pp…

核理论 · 物理学 2015-06-16 Hong-Min Wang , Jia-Fu Liu , Zhao-Yu Hou , Xian-Jing Sun

I present a calculation of next-to-next-to-next-to-leading-order (NNNLO) soft-gluon corrections for differential distributions in top-antitop pair production in hadronic collisions. Approximate NNNLO (aNNNLO) results are obtained from…

高能物理 - 唯象学 · 物理学 2015-03-05 Nikolaos Kidonakis

The production of $W^{\pm}$ and $Z^0$ bosons in collisions of longitudinally polarized protons allows to access various combinations of the polarized quark distributions from the study of double and single spin asymmetries. We compute the…

高能物理 - 唯象学 · 物理学 2009-10-30 T. Gehrmann

An effective theory for the soft field modes in hot QCD has been obtained recently by integrating out the field modes of momenta of order T and g T. The mean hard particle distribution obeys a transport equation with a collision term. The…

高能物理 - 唯象学 · 物理学 2009-10-31 F. Guerin

We study W-boson production with large transverse momentum, Q_T, in pp collisions at the LHC. We calculate the complete NLO corrections and the soft-gluon NNLO corrections to the differential cross section. The NLO corrections are large but…

高能物理 - 唯象学 · 物理学 2017-08-23 Nikolaos Kidonakis , Richard J. Gonsalves , Agustin Sabio Vera

The discovery of a Standard Model Higgs boson is possible when experimental cuts are applied which increase the ratio of signal and background cross-sections. In this paper we study the pp->H->WW signal cross-section at the LHC which…

高能物理 - 唯象学 · 物理学 2008-11-26 Charalampos Anastasiou , Guenther Dissertori , Fabian Stoeckli , Bryan R. Webber

We have computed the full next-to-leading (NLO) QCD corrections to the differential distributions $d^2\sigma/(dp_T~dy)$ for pseudo-scalar Higgs (A) production at large hadron colliders. This calculation has been carried out using the…

高能物理 - 唯象学 · 物理学 2009-11-07 B. Field , J. Smith , M. E. Tejeda-Yeomans , W. L. van Neerven

Widths of the rapidity distributions of various identified hadrons generated with the UrQMD-3.4 event generator at all the Super Proton Synchrotron (SPS) energies have been presented and compared with the existing experimental results. An…

核理论 · 物理学 2017-09-11 Nur Hussain , Buddhadeb Bhattacharjee

The first results on next-to-leading order QCD corrections to production of two $Z$ bosons in hadronic collisions in the extra dimension model of Randall and Sundrum are presented. Various kinematical distributions are obtained to order…

高能物理 - 唯象学 · 物理学 2014-11-20 Neelima Agarwal , V. Ravindran , Vivek Kumar Tiwari , Anurag Tripathi

Parton distribution functions (PDFs) at large $x$ are poorly constrained by high-energy experimental data, but extremely important for probing physics beyond standard model at colliders. We study the calculation of PDFs at large-$x$ through…

高能物理 - 唯象学 · 物理学 2025-08-05 Xiangdong Ji , Yizhuang Liu , Yushan Su

I present improved predictions for the total hadronic cross section of stop-antistop production at hadron colliders including next-to-next-to-leading-order threshold corrections and approximated Coulomb corrections. The results are based on…

高能物理 - 唯象学 · 物理学 2011-07-15 Ulrich Langenfeld

We compare predictions for the W, Z, gg->H and t-tbar total cross sections at the Large Hadron Collider (LHC), for a centre-of-mass energy of 7 TeV, using the most recent publicly available next-to-leading order and next-to-next-to-leading…

高能物理 - 唯象学 · 物理学 2011-09-16 G. Watt

We present accurate QCD predictions for the transverse momentum pT spectrum of electroweak gauge bosons at the LHC for 13 TeV collisions, based on a consistent combination of a NNLO calculation at large pT and N3LL resummation in the small…

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