On the transverse momentum distribution of massive lepton pairs

Dokshitzer, Yu. L.; D'yakonov, D.I.; Troyan, S. I.

doi:10.1016/0370-2693(78)90240-x

Cited by 203 publications

(210 citation statements)

References 3 publications

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“…(2.12) and (2.16). The relationship of the z = 1 behavior with small transverse momenta is important to construct reliable theoretical predictions for transverse momentum q ⊥ spectra at low q ⊥ in the production of massive states in hadronic collisions [4,24,[85][86][87][88][89][90][91][92][93][94].…”

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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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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“…The y sensitivity of R(q T , y) starts at the NLL level. The corrections produced on the dominant soft-gluon effects by the collinear radiation are physically [29] well approximated by varying the scale µ of the gluon density from µ ∼ M H to µ ∼ q T . As a consequence, the variations of the hardness of the of the q T cross sections are mainly driven by d ln f g (x, q 2 T )/d ln q 2 T , the amount of scaling violation of the gluon density.…”

Section: Figurementioning

confidence: 99%

“…To obtain reliable perturbative predictions, these terms have to be resummed to all orders in α S . The method to systematically perform all-order resummation of classes of logarithmically-enhanced terms at small q T is known [29]- [36]. In the case of the SM Higgs boson, resummation has been explicitly worked out at leading logarithmic (LL), NLL [35,37] and NNLL [38] level.…”

Section: Introductionmentioning

confidence: 99%

Higgs boson production at the LHC: Transverse-momentum resummation and rapidity dependence

et al. 2008

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We consider Higgs boson production by gluon fusion in hadron collisions. We study the doubly-differential transverse-momentum (q T ) and rapidity (y) distribution of the Higgs boson in perturbative QCD. In the region of small q T (q T ≪ M H , M H being the mass of the Higgs boson), we include the effect of logarithmicallyenhanced contributions due to multiparton radiation to all perturbative orders. We use the impact parameter and double Mellin moments to implement and factorize the multiparton kinematics constraint of transverse-and longitudinal-momentum conservation. The logarithmic terms are then systematically resummed in exponential form. At small q T , we perform the all-order resummation of large logarithms up to next-to-next-to-leading logarithmic accuracy, while at large q T (q T ∼ M H ), we apply a matching procedure that recovers the fixed-order perturbation theory up to nextto-leading order. We present quantitative results for the differential cross section in q T and y at the LHC, and we comment on the comparison with the q T cross section integrated over y.

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“…Accordingly, in order to obtain a reliable estimate for the cross section, one has to sum up ("resum") the large logarithmic contributions to all orders in α s . Techniques for this resummation are well established, starting with pioneering work mostly on the Drell-Yan process in the late 1970's to mid 1980's [18,19,20,21,22]. The "Collins-Soper-Sterman" (CSS) formalism [22] has become the standard method for q T resummation.…”

Section: Introductionmentioning

confidence: 99%

Resummation for polarized semi-inclusive deep-inelastic scattering at small transverse momentum

2006

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We study the transverse-momentum distribution of hadrons produced in semi-inclusive deep-inelastic scattering (SIDIS). We consider cross sections for various combinations of polarizations of the initial lepton and nucleon or the produced hadron, for which we perform the resummation of large double-logarithmic perturbative corrections arising at small transverse momentum. We present phenomenological results for the processes lp → lπX with longitudinally polarized leptons and protons. We discuss the impact of the perturbative resummation and of estimated non-perturbative contributions on the corresponding cross sections and their spin asymmetry. Our results should be relevant for ongoing studies in the COMPASS experiment at CERN, and for future experiments at the proposed eRHIC collider at BNL.

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On the transverse momentum distribution of massive lepton pairs

Cited by 203 publications

References 3 publications

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

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

Higgs boson production at the LHC: Transverse-momentum resummation and rapidity dependence

Resummation for polarized semi-inclusive deep-inelastic scattering at small transverse momentum

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