Transverse-momentum resummation and the spectrum of the Higgs boson at the LHC
By G. Bozzi, S. Catani, D. Florian, M. Grazzini. 2005
447 citations recorded by the source corpus.
Abstract We consider the transverse-momentum ( q T ) distribution of generic high-mass systems (lepton pairs, vector bosons, Higgs particles, …) produced in hadron collisions. At small q T , we concentrate on the all-order resummation of the logarithmically-enhanced contributions in QCD perturbation theory. We elaborate on the b-space resummation formalism and introduce some novel features: the large logarithmic contributions are systematically exponentiated in a process-independent form and, after integration over q T , they are constrained by perturbative unitarity to give a vanishing contribution to the total cross section. At intermediate and large q T , resummation is consistently combined with fixed-order perturbative results, to obtain predictions with uniform theoretical accuracy over the entire range of transverse momenta. The formalism is applied to Standard Model Higgs boson production at LHC energies. We combine the most advanced perturbative information available at present for this process: resummation up to next-to-next-to-leading logarithmic accuracy and fixed-order perturbation theory up to next-to-leading order. The results show a high stability with respect to perturbative QCD uncertainties.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/cd14f0bd13624cb7e5b7cd02e23d25b88721411f
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In Nuclear and High Energy Physics
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Citations in the corpus
- Illuminating dark photons with high-energy colliders (2014, unknown): “0 [132, 133].”
- NLO Higgs boson production via gluon fusion matched with shower in POWHEG (2008, methodology): “been thus carried out with the HqT [ 30 ] program, that performs such a resummation.”
- The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations (2014, unknown): “[208]).”
- Measurement of Higgs boson production and properties in the WW decay channel with leptonic final states (2013, background): “As a result of the analysis in that control sample, a factor of 1.5± 0.5 with respect to the predicted LO cross section is found.”
- Factorization at the LHC: From parton distribution functions to initial state jets (2010, background): “Theoretically, one can also study the Higgs production as a function of the Higgs transverse momentum, pT , both in fixed-order perturbation theory for large p H T [18, 86, 105, 154] and with a resummation of logarithms of pT at small p H T [25, 50, 55, 56, 76, 131, 142].”
- Handbook of LHC Higgs Cross Sections: 1. Inclusive Observables (2011, background): “tion of an associated jet is also known, like, for example, tt production. – In the Sudakov region the transverse-momentum distribution of POWHEG agrees well with the analytic NLL calculation of Ref. [351], while the also available NNLL result is above POWHEG, but with a very similar shape (see Fig.”