Results 21 to 30 of about 107,544 (258)

Next-to-next-to-leading-order QCD corrections to J/ψ plus η c production at the B factories

Journal of High Energy Physics, 2023
In this paper, we calculate the next-to-next-to-leading-order (NNLO) QCD corrections to e + e − → J/ψ + η c at the B factories. After including the NNLO corrections, the cross section of e + e − → J/ψ +η c is enhanced by about 17%, and the perturbative ...
Xu-Dong Huang, Bin Gong, Jian-Xiong Wang
doaj   +1 more source

Generalized Parton Distributions -- theoretical review --

, 2005
In this talk an introduction to generalized parton distributions is given. Recent developments are shortly reviewed, including non-perturbative calculations, phenomenological aspects and evaluation of higher order perturbative and power corrections ...
Anikin, Balitsky, Belitsky, Belitsky, Belitsky, Belitsky, Belitsky, Belitsky, Belitsky, Belitsky, Belitsky, Belitsky, Belitsky, Belitsky, Berger, Berger, Boffi, Bordag, Burkardt, Cano, Cano, Choi, Collins, Collins, D. Müller, Diehl, Diehl, Diehl, Diehl, Diehl, Diehl, Diehl, Dittes, Eides, Frankfurt, Frankfurt, Frankfurt, Freund, Freund, Geyer, Geyer, Gockeler, Goeke, Guidal, Guzey, Hagler, Hoodbhoy, Huang, Ivanov, Ji, Ji, Ji, Ji, Ji, Kirchner, Kivel, Kivel, Lepage, Mankiewicz, Mankiewicz, Mankiewicz, Martin, Melic, Müller, Müller, Müller, Petrov, Pire, Pobylitsa, Polyakov, Polyakov, Polyakov, Radyushkin, Radyushkin, Radyushkin, Radyushkin, Radyushkin, Ralston, Scopetta, Teryaev, Theussl, Tiburzi, Vanderhaeghen   +82 more
core   +1 more source

Jet-veto resummation at N3LLp + NNLO in boson production processes

Journal of High Energy Physics, 2023
Vetoing energetic jet activity is a crucial tool for suppressing backgrounds and enabling new physics searches at the LHC, but the introduction of a veto scale can introduce large logarithms that may need to be resummed.
John M. Campbell, R. Keith Ellis, Tobias Neumann, Satyajit Seth   +3 more
doaj   +1 more source

Jet Production at HERA

, 2001
I review the status of perturbative QCD calculations for jet production in eP-scattering at HERA. I will discuss possibilities of combining fixed order, especially higher order, calculations and parton showers.Comment: 13 pages, 5 eps ...
Pötter, B.
core   +2 more sources

Deviation pattern approach for optimizing perturbative terms of QCD renormalization group invariant observables [PDF]

, 2017
We first consider the idea of renormalization group-induced estimates, in the context of optimization procedures, for the Brodsky-Lepage-Mackenzie approach to generate higher-order contributions to QCD perturbative series.
Khellat, M., Mirjalili, A.
core   +1 more source

Automation of antenna subtraction in colour space: gluonic processes

Journal of High Energy Physics, 2022
We present the colourful antenna subtraction method, a reformulation of the antenna subtraction scheme for next-to-next-to-leading order (NNLO) calculations in QCD. The aim of this new approach is to achieve a general and process-independent construction
X. Chen, T. Gehrmann, E. W. N. Glover, A. Huss, M. Marcoli   +4 more
doaj   +1 more source

Higgs-boson production through gluon fusion at NNLO QCD with parton showers

, 2014
We discuss how the UN2LOPS scheme for matching NNLO calculations to parton showers can be applied to processes with large higher-order perturbative QCD corrections. We focus on Higgs-boson production through gluon fusion as an example. We also present an
Höche, Stefan, Li, Ye, Prestel, Stefan
core   +1 more source

NLO EW and QCD corrections to polarised same-sign WW scattering at the LHC

Journal of High Energy Physics
We present the first calculation of same-sign WW scattering at the LHC in the fully leptonic decay channel including the modelling of polarisation for intermediate electroweak bosons and radiative corrections up to NLO EW+QCD accuracy.
Ansgar Denner, Christoph Haitz, Giovanni Pelliccioli   +2 more
doaj   +1 more source

Analysis of double-J/ψ production in Z decay at next-to-leading-order QCD accuracy

Journal of High Energy Physics, 2023
In this article, we study in detail the double-J/ψ yield through Z decay at the next-to-leading-order (NLO) QCD accuracy within the nonrelativistic QCD factorization. At the tree level, the pure QCD diagrams predict a branching ratio of B Z → J / ψ + J /
Cong Li, Zhan Sun, Gui-Yuan Zhang
doaj   +1 more source

Direct Extraction of QCD Lambda MS-bar from e+e- Jet Observables

, 2000
We directly fit the QCD dimensional transmutation parameter, Lambda MS-bar, to experimental data on e+e- jet observables, making use of next-to-leading order (NLO) perturbative calculations.
Abe, Abreu, Abreu, Acton, Adeva, Alles, Barate, Barber, Barclay, Bardeen, Basham, Basham, Basham, Bernreuther, Bethke, Bethke, Bethke, Bethke, Brandt, Braunschweig, Brown, Buras, C.J. Maxwell, Campbell, Campbell, Catani, Catani, Catani, Catani, Celmaster, Chetyrkin, Clavelli, Davies, Dokshitzer, Donoghue, El-Khadra, Ellis, Farhi, Gardi, Giele, Groom, Grunberg, Grunberg, Gupta, Kunszt, Li, Luscher, Luscher, Magradze, Marchesini, Maxwell, Maxwell, Moretti, Nason, Parisi, Petersen, S.J. Burby, Schmelling, Sjöstrand, Stevenson, Stevenson, Zakharov   +61 more
core   +2 more sources