QCD coherence in high-energy reactions

Dokshitzer, Yu. L.; Хозе, В. А.; Troyan, S. I.; Mueller, Alfred H.

doi:10.1103/revmodphys.60.373

Cited by 266 publications

(290 citation statements)

References 35 publications

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“…The problem of the soft limit of the perturbation theory and the transition to the hadronic final state, however, is still not solved at a fundamental level. The studies of the global properties of the hadronic final states gave support to the idea that the colour confinement mechanism should be rather soft [1,2]. Meanwhile, the close similarity between hadronic and partonic final states has been found for a large variety of observables, provided the parton cascade in the perturbative calculation is evolved down to rather low virtualities of the order of a few hundred MeV; this phenomenon is called "Local Parton Hadron Duality" (LPHD) [3] (for a recent review, see [4]).…”

Section: Introductionmentioning

confidence: 83%

Low and high energy limits of particle spectra in QCD jets

Lupia¹,

Ochs²

1998

Eur. Phys. J. C

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Charged particle energy spectra in e + e − annihilation are compared with the analytical predictions from the QCD evolution equation in the Modified Leading Log Approximation. With the nonperturbative initial condition shifted down to threshold as suggested by the Local Parton Hadron Duality picture a good description of the data from the lowest up to highest available energies results. The two essential parameters in this approach are determined from a moment analysis. The sensitivity of the fit to the running of α s and to the number of active flavours (including a light gluino) is demonstrated. For very high energies the theory predicts a scaling behaviour in certain rescaled variables ("ζ-scaling"). The data show an approximate behaviour of this type in the present energy range and come close to the predicted asymptotic scaling function for the small particle energies.

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Section: Introductionmentioning

confidence: 83%

Low and high energy limits of particle spectra in QCD jets

Lupia¹,

Ochs²

1998

Eur. Phys. J. C

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“…We introduce a soft-gluon resolution scale into the renormalization group evolution equations, and describe resolvable and non-resolvable emissions. We discuss the relationship of our results with the angular-ordered, coherent branching [70][71][72][73] and the behavior of the endpoint z → 1 region in transverse momentum distributions [74,75]. We construct an iterative Monte Carlo solution of the evolution equations, and apply it to the case of collinear and TMD parton densities.…”

Section: Jhep01(2018)070mentioning

confidence: 99%

Collinear and TMD quark and gluon densities from parton branching solution of QCD evolution equations

Hautmann

Jung

Žlebčík

et al. 2018

J. High Energ. Phys.

112

115

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We study parton-branching solutions of QCD evolution equations and present a method to construct both collinear and transverse momentum dependent (TMD) parton densities from this approach. We work with next-to-leading-order (NLO) accuracy in the strong coupling. Using the unitarity picture in terms of resolvable and non-resolvable branchings, we analyze the role of the soft-gluon resolution scale in the evolution equations. For longitudinal momentum distributions, we find agreement of our numerical calculations with existing evolution programs at the level of better than 1% over a range of five orders of magnitude both in evolution scale and in longitudinal momentum fraction. We make predictions for the evolution of transverse momentum distributions. We perform fits to the high-precision deep inelastic scattering (DIS) structure function measurements, and we present a set of NLO TMD distributions based on the parton branching approach.

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“…These are relevant, along with large-angle effects in the Sudakov region (see e.g. [37]), to achieve a full treatment of gluon coherence effects [38] capable of describing jet final states across the whole rapidity phase space. A uniform treatment of the high-energy and Sudakov regions is still an open issue [39] of interest for parton-shower implementations.…”

Section: Jhep09(2009)121mentioning

confidence: 99%

Forward jet production at the Large Hadron Collider

Deák

Hautmann

Jung

et al. 2009

J. High Energy Phys.

154

196

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At the Large Hadron Collider (LHC) it will become possible for the first time to investigate experimentally the forward region in hadron-hadron collisions via high-p T processes. In the LHC forward kinematics QCD logarithmic corrections in the hard transverse momentum and in the large rapidity interval may both be quantitatively significant. We analyze the hadroproduction of forward jets in the framework of QCD high-energy factorization, which allows one to resum consistently both kinds of corrections to higher orders in QCD perturbation theory. We compute the short-distance matrix elements needed to evaluate the factorization formula at fully exclusive level. We discuss numerically dynamical features of multi-gluon emission at large angle encoded in the factorizing high-energy amplitudes.

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QCD coherence in high-energy reactions

Cited by 266 publications

References 35 publications

Low and high energy limits of particle spectra in QCD jets

Low and high energy limits of particle spectra in QCD jets

Collinear and TMD quark and gluon densities from parton branching solution of QCD evolution equations

Forward jet production at the Large Hadron Collider

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