Doped Parton Distributions

Valerio Bertone, Stefano Carrazza, Juan Rojo

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Calculations of high-energy processes involving the production of b-quarks are typically performed in two different ways, the massive four-flavour scheme (4FS) and the massless five-flavour scheme (5FS). For processes where the combination of the 4FS and 5FS results into a matched calculation is technically difficult, it is possible to define a hybrid scheme known as the doped scheme, where above the b-quark threshold the strong coupling runs with $n_f=5$, as in the massless calculation, while the DGLAP splitting functions are those of the $n_f=4$ scheme. In this contribution we present NNPDF3.0 PDF sets in this doped scheme, compare them with the corresponding 4FS and 5FS sets, and discuss their relevance for LHC phenomenology.
Original languageEnglish
JournalarXiv.org
Publication statusPublished - 14 Sep 2015

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partons
quarks
phenomenology
thresholds
energy

Bibliographical note

5 pages, 5 figures, to appear in the proceedings of the 27th Rencontres de Blois on Particle Physics and Cosmology, Blois, May 31 to June 05, 2015

Keywords

  • hep-ph
  • hep-ex

Cite this

Bertone, V., Carrazza, S., & Rojo, J. (2015). Doped Parton Distributions. arXiv.org.
Bertone, Valerio ; Carrazza, Stefano ; Rojo, Juan. / Doped Parton Distributions. In: arXiv.org. 2015.
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Bertone, V, Carrazza, S & Rojo, J 2015, 'Doped Parton Distributions' arXiv.org.

Doped Parton Distributions. / Bertone, Valerio; Carrazza, Stefano; Rojo, Juan.

In: arXiv.org, 14.09.2015.

Research output: Contribution to JournalArticleAcademicpeer-review

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T1 - Doped Parton Distributions

AU - Bertone, Valerio

AU - Carrazza, Stefano

AU - Rojo, Juan

N1 - 5 pages, 5 figures, to appear in the proceedings of the 27th Rencontres de Blois on Particle Physics and Cosmology, Blois, May 31 to June 05, 2015

PY - 2015/9/14

Y1 - 2015/9/14

N2 - Calculations of high-energy processes involving the production of b-quarks are typically performed in two different ways, the massive four-flavour scheme (4FS) and the massless five-flavour scheme (5FS). For processes where the combination of the 4FS and 5FS results into a matched calculation is technically difficult, it is possible to define a hybrid scheme known as the doped scheme, where above the b-quark threshold the strong coupling runs with $n_f=5$, as in the massless calculation, while the DGLAP splitting functions are those of the $n_f=4$ scheme. In this contribution we present NNPDF3.0 PDF sets in this doped scheme, compare them with the corresponding 4FS and 5FS sets, and discuss their relevance for LHC phenomenology.

AB - Calculations of high-energy processes involving the production of b-quarks are typically performed in two different ways, the massive four-flavour scheme (4FS) and the massless five-flavour scheme (5FS). For processes where the combination of the 4FS and 5FS results into a matched calculation is technically difficult, it is possible to define a hybrid scheme known as the doped scheme, where above the b-quark threshold the strong coupling runs with $n_f=5$, as in the massless calculation, while the DGLAP splitting functions are those of the $n_f=4$ scheme. In this contribution we present NNPDF3.0 PDF sets in this doped scheme, compare them with the corresponding 4FS and 5FS sets, and discuss their relevance for LHC phenomenology.

KW - hep-ph

KW - hep-ex

UR - https://arxiv.org/abs/1509.04022

M3 - Article

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Bertone V, Carrazza S, Rojo J. Doped Parton Distributions. arXiv.org. 2015 Sep 14.