dc.contributor.author | Paukkunen, H. | |
dc.contributor.author | Helenius, I. | |
dc.contributor.editor | d'Enterria, David | |
dc.contributor.editor | Morsch, Andreas | |
dc.contributor.editor | Crochet, Philippe | |
dc.date.accessioned | 2019-10-16T11:43:09Z | |
dc.date.available | 2019-10-16T11:43:09Z | |
dc.date.issued | 2019 | |
dc.identifier.citation | Paukkunen, H., & Helenius, I. (2019). Heavy-flavour production in the SACOT-mT scheme. In D. d'Enterria, A. Morsch, & P. Crochet (Eds.), <i>Hard Probes 2018 : International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions</i> (Article 145). Sissa Medialab srl. POS Proceedings of Science, 345. <a href="https://doi.org/10.22323/1.345.0145" target="_blank">https://doi.org/10.22323/1.345.0145</a> | |
dc.identifier.other | CONVID_33247952 | |
dc.identifier.uri | https://jyx.jyu.fi/handle/123456789/65911 | |
dc.description.abstract | The hadroproduction of heavy-flavoured mesons has recently attracted a growing interest e.g. within the people involved in global analysis of proton and nuclear parton distribution functions, saturation physics, and physics of cosmic rays. In particular, the D- and B-meson measurements of LHCb at forward direction are sensitive to gluon dynamics at small x and are one of the few perturbative small-x probes before the next generation deep-inelastic-scattering experiments. In this talk, we will concentrate on the collinear-factorization approach to inclusive D-meson production and describe a novel implementation — SACOT-mT — of the general-mass variable flavour number scheme (GM-VFNS). In the GM-VFNS framework the cross sections retain the full heavy-quark mass dependence at pT = 0, but gradually reduce to the ordinary zero-mass results towards asymptotically high pT. However, the region of small (but non-zero) pT has been somewhat problematic in the previous implementations of GM-VFNS, leading to divergent cross sections towards pT → 0, unless the QCD scales are set in a particular way. Here, we provide a solution to this problem. In essence, the idea is to consistently account for the underlying energy-momentum conservation in the presence of a final-state heavy quark-antiquark pair. This automatically leads to a well-behaved GM-VFNS description of the cross sections across all pT without a need to fine tune the QCD scales. The results are compared with the LHCb data and a very good agreement is found. We also compare to fixed-order based calculations and explain why they lead to approximately a factor of two lower D-meson production cross sections than the GM-VFNS approach. | en |
dc.format.mimetype | application/pdf | |
dc.language | eng | |
dc.language.iso | eng | |
dc.publisher | Sissa Medialab srl | |
dc.relation.ispartof | Hard Probes 2018 : International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions | |
dc.relation.ispartofseries | POS Proceedings of Science | |
dc.rights | CC BY-NC-ND 4.0 | |
dc.title | Heavy-flavour production in the SACOT-mT scheme | |
dc.type | conferenceObject | |
dc.identifier.urn | URN:NBN:fi:jyu-201910164484 | |
dc.contributor.laitos | Fysiikan laitos | fi |
dc.contributor.laitos | Department of Physics | en |
dc.type.uri | http://purl.org/eprint/type/ConferencePaper | |
dc.type.coar | http://purl.org/coar/resource_type/c_5794 | |
dc.description.reviewstatus | peerReviewed | |
dc.relation.issn | 1824-8039 | |
dc.type.version | publishedVersion | |
dc.rights.copyright | © The Authors, 2019 | |
dc.rights.accesslevel | openAccess | fi |
dc.relation.conference | International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions | |
dc.relation.grantnumber | 297058 | |
dc.relation.grantnumber | 308301 | |
dc.subject.yso | hiukkasfysiikka | |
dc.format.content | fulltext | |
jyx.subject.uri | http://www.yso.fi/onto/yso/p15576 | |
dc.rights.url | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.relation.doi | 10.22323/1.345.0145 | |
dc.relation.funder | Research Council of Finland | en |
dc.relation.funder | Research Council of Finland | en |
dc.relation.funder | Suomen Akatemia | fi |
dc.relation.funder | Suomen Akatemia | fi |
jyx.fundingprogram | Academy Project, AoF | en |
jyx.fundingprogram | Academy Research Fellow, AoF | en |
jyx.fundingprogram | Akatemiahanke, SA | fi |
jyx.fundingprogram | Akatemiatutkija, SA | fi |
jyx.fundinginformation | We acknowledge the Academy of Finland, Projects 297058 and 308301, as well as the Carl Zeiss Foundation and the state of Baden-Württemberg through bwHPC, for support. The Finnish IT Center for Science (CSC) has provided computational resources for this work. | |
dc.type.okm | A4 | |