Relevant bibliographies by topics / Next-to-leading order (NLO)

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Academic literature on the topic 'Next-to-leading order (NLO)'

Author: Grafiati
Published: 26 October 2023

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Journal articles on the topic "Next-to-leading order (NLO)"

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CONTOGOURIS, A. P., and Z. MEREBASHVILI. "APPROXIMATE NEXT-TO-LEADING ORDER AND NEXT-TO-NEXT-TO-LEADING ORDER CORRECTIONS." International Journal of Modern Physics A 18, no. 06 (2003): 957–66. http://dx.doi.org/10.1142/s0217751x03013983.

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For processes involving structure functions and/or fragmentation functions, arguments that over a range of a proper kinematic variable, there is a part that dominates the next-to-leading order (NLO) corrections, are briefly reviewed. The arguments are tested against more recent NLO and in particular complete next-to-next-to-leading order (NNLO) calculations. A critical examination of when these arguments may not be useful is also presented.
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CHIRILLI, GIOVANNI ANTONIO. "SMALL-x EVOLUTION IN THE NEXT-TO-LEADING ORDER." Modern Physics Letters A 24, no. 35n37 (2009): 3052–61. http://dx.doi.org/10.1142/s0217732309001261.

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After a brief introduction to Deep Inelastic Scattering in the Bjorken limit and in the Regge Limit we discuss the operator product expansion in terms of non local string operator and in terms of Wilson lines. We will show how the high-energy behavior of amplitudes in gauge theories can be reformulated in terms of the evolution of Wilson-line operators. In the leading order this evolution is governed by the non-linear Balitsky-Kovchegov (BK) equation. In order to see if this equation is relevant for existing or future deep inelastic scattering (DIS) accelerators (like Electron Ion Collider (EIC) or Large Hadron electron Collider (LHeC)) one needs to know the next-to-leading order (NLO) corrections. In addition, the NLO corrections define the scale of the running-coupling constant in the BK equation and therefore determine the magnitude of the leading-order cross sections. In Quantum Chromodynamics (QCD), the next-to-leading order BK equation has both conformal and non-conformal parts. The NLO kernel for the composite operators resolves in a sum of the conformal part and the running-coupling part. The QCD and [Formula: see text] kernel of the BK equation is presented.
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BALITSKY, IAN. "PHOTON IMPACT FACTOR AND kT FACTORIZATION IN THE NEXT-TO-LEADING ORDER." International Journal of Modern Physics: Conference Series 20 (January 2012): 187–99. http://dx.doi.org/10.1142/s2010194512009233.

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The photon impact factor for the BFKL pomeron is calculated in the next-to-leading order (NLO) approximation using the operator expansion in Wilson lines. The result is represented as a NLO kT-factorization formula for the structure functions of small-x deep inelastic scattering.
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Triantafyllopoulos, D. N. "Forward particle production in proton-nucleus collisions at next-to-leading order." EPJ Web of Conferences 192 (2018): 00014. http://dx.doi.org/10.1051/epjconf/201819200014.

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We consider the next-to-leading order (NLO) calculation of single inclusive particle production at forward rapidities in proton-nucleus collisions and in the framework of the Color Glass Condensate (CGC). We focus on the quark channel and the corrections associated with the impact factor. In the first step of the evolution the kinematics of the emitted gluon is kept exactly (and not in the eikonal approximation), but such a treatment which includes NLO corrections is not explicitly separated from the high energy evolution. Thus, in this newly established “factorization scheme”, there is no “rapidity subtraction”. The latter suffers from fine tuning issues and eventually leads to an unphysical (negative) cross section. On the contrary, our reorganization of the perturbation theory leads by definition to a well-defined cross section and the numerical evaluation of the NLO correction is shown to have the correct size.
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Carloni Calame, Carlo M., Mauro Chiesa, Guido Montagna, Oreste Nicrosini, and Fulvio Piccinini. "Muon-electron scattering at next-to-leading order accuracy." EPJ Web of Conferences 212 (2019): 05002. http://dx.doi.org/10.1051/epjconf/201921205002.

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The next-to-leading order electro-weak radiative corrections to the µ±e- → µ±e- process are reviewed and their relevance is discussed for the MUonE experiment, proposed at CERN. The aim of MUonE is the high precision measurement of the QED running coupling constant in the space-like region, from which the full hadronic contribution can be extracted and used to provide a new and independent determination of the leading-order hadronic correction to the muon g − 2. In this context, the required accuracy demands that radiative corrections are accounted for at the highest level of precision and implemented into a Monte Carlo event generator for data analysis. The first step towards the final goal of theoretical precision, which will require the full set of NNLO corrections and resummation of higher orders, is the inclusion of NLO electro-weak corrections.
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FIGY, TERRANCE. "NEXT-TO-LEADING ORDER QCD CORRECTIONS TO LIGHT HIGGS PAIR PRODUCTION VIA VECTOR BOSON FUSION." Modern Physics Letters A 23, no. 24 (2008): 1961–73. http://dx.doi.org/10.1142/s0217732308028181.

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We present the NLO QCD corrections for light Higgs pair production via vector boson fusion at the LHC within the CP conserving type II two-Higgs doublet model in the form of a fully flexible parton-level Monte Carlo program. Scale dependences on integrated cross sections and distributions are reduced with QCD K-factors of order unity.
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BUTENSCHOEN, MATHIAS, та BERND A. KNIEHL. "NEXT-TO-LEADING ORDER TESTS OF NON-RELATIVISTIC-QCD FACTORIZATION WITH J/ψ YIELD AND POLARIZATION". Modern Physics Letters A 28, № 09 (2013): 1350027. http://dx.doi.org/10.1142/s0217732313500272.

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We report on recent progress in testing the factorization formalism of non-relativistic quantum chromodynamics (NRQCD) at next-to-leading order (NLO) for J/ψ yield and polarization. We demonstrate that it is possible to unambiguously determine the leading color-octet (CO) long-distance matrix elements (LDMEs) in compliance with the velocity scaling rules through a global fit to experimental data of unpolarized J/ψ production in pp, [Formula: see text], ep, γγ, and e+e-collisions. Three data sets not included in the fit, from hadro-production and from photo-production in the fixed-target and colliding-beam modes, are nicely reproduced. The polarization observables measured in different frames at DESY HERA and CERN LHC reasonably agree with NLO NRQCD predictions obtained using the LDMEs extracted from the global fit, while measurements at the FNAL Tevatron exhibit severe disagreement. We demonstrate that the alternative LDME sets recently obtained, with different philosophies, in two other NLO NRQCD analyses of J/ψ yield and polarization also fail to reconcile the Tevatron polarization data with the other available world data.
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Brandenburg, A., S. Dittmaier, P. Uwer, and S. Weinzierl. "Top quark pair + jet production at next-to-leading order: NLO QCD corrections to." Nuclear Physics B - Proceedings Supplements 135 (October 2004): 71–75. http://dx.doi.org/10.1016/j.nuclphysbps.2004.09.038.

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Ogul, Hasan, Kamuran Dilsiz, Emrah Tiras, Ping Tan, Yasar Onel, and Jane Nachtman. "High Order QCD Predictions for Inclusive Production ofWBosons inppCollisions ats=13 TeV." Advances in High Energy Physics 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/7865689.

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Predictions of fiducial cross sections, differential cross sections, and lepton charge asymmetry are presented for the production ofW±bosons with leptonic decay up to next-to-next-to-leading order (NNLO) in perturbative QCD. Differential cross sections ofW±bosons andWboson lepton charge asymmetry are computed as a function of lepton pseudorapidity for a defined fiducial region inppcollisions ats=13 TeV. Numerical results of fiducialW±cross section predictions are presented with the latest modern PDF models at next-to-leading order (NLO) and NNLO. It is found that the CT14 and NNPDF 3.0 predictions with NNLO QCD corrections are about 4% higher than the NLO CT14 and NNPDF 3.0 predictions while MMHT 2014 predictions with NLO QCD corrections are smaller than its NNLO QCD predictions by approximately 6%. In addition, the NNLO QCD corrections reduce the scale variation uncertainty on the cross section by a factor of 3.5. The prediction of central values and considered uncertainties are obtained using FEWZ 3.1 program.
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Gnech, Alex, Jordy de Vries, Sachin Shain, and Michele Viviani. "Electric dipole moment of light nuclei in chiral effective field theory." EPJ Web of Conferences 258 (2022): 06007. http://dx.doi.org/10.1051/epjconf/202225806007.

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CP-violating interactions at quark level generate CP-violating nuclear interactions and currents, which could be revealed by looking at the presence of a permanent nuclear electric dipole moment. Within the framework of chiral effective field theory, we discuss the derivation of the CP-violating nuclear potential up to next-to-next-to leading order (N2LO) and the preliminary results for the charge operator up to next-to leading order (NLO). Moreover, we introduce some renormalization argument which indicates that we need to promote the short-distance operator to the leading order (LO) in order to reabsorb the divergences generated by the one pion exchange. Finally, we present some selected numerical results for the electric dipole moments of 2H, 3He and 3H discussing the systematic errors introduced by the truncation of the chiral expansion.
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