### Abstract

Original language | English |
---|---|

Journal | arXiv.org |

Publication status | Published - 29 Jan 2016 |

### Fingerprint

### Bibliographical note

31 pages, 13 figures. Final version published in Eur. Phys. J. C: typos corrected, discussion of perturbative orders added in sects 2.3 and 3.1### Keywords

- hep-ph
- hep-ex

### Cite this

*arXiv.org*.

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*arXiv.org*.

**Specialized minimal PDFs for optimized LHC calculations.** / Carrazza, Stefano; Forte, Stefano; Kassabov, Zahari; Rojo, Juan.

Research output: Contribution to Journal › Article › Academic › peer-review

TY - JOUR

T1 - Specialized minimal PDFs for optimized LHC calculations

AU - Carrazza, Stefano

AU - Forte, Stefano

AU - Kassabov, Zahari

AU - Rojo, Juan

N1 - 31 pages, 13 figures. Final version published in Eur. Phys. J. C: typos corrected, discussion of perturbative orders added in sects 2.3 and 3.1

PY - 2016/1/29

Y1 - 2016/1/29

N2 - We present a methodology for the construction of parton distribution functions (PDFs) designed to provide an accurate representation of PDF uncertainties for specific processes or classes of processes with a minimal number of PDF error sets: specialized minimal PDF sets, or SM-PDFs. We construct these SM-PDFs in such a way that sets corresponding to different input processes can be combined without losing information, specifically on their correlations, and that they are robust upon smooth variations of the kinematic cuts. The proposed strategy never discards information, so that the SM-PDF sets can be enlarged by the addition of new processes, until the prior PDF set is eventually recovered for a large enough set of processes. We illustrate the method by producing SM-PDFs tailored to Higgs, top quark pair, and electroweak gauge boson physics, and determine that, when the PDF4LHC15 combined set is used as the prior, around 11, 4 and 11 Hessian eigenvectors respectively are enough to fully describe the corresponding processes.

AB - We present a methodology for the construction of parton distribution functions (PDFs) designed to provide an accurate representation of PDF uncertainties for specific processes or classes of processes with a minimal number of PDF error sets: specialized minimal PDF sets, or SM-PDFs. We construct these SM-PDFs in such a way that sets corresponding to different input processes can be combined without losing information, specifically on their correlations, and that they are robust upon smooth variations of the kinematic cuts. The proposed strategy never discards information, so that the SM-PDF sets can be enlarged by the addition of new processes, until the prior PDF set is eventually recovered for a large enough set of processes. We illustrate the method by producing SM-PDFs tailored to Higgs, top quark pair, and electroweak gauge boson physics, and determine that, when the PDF4LHC15 combined set is used as the prior, around 11, 4 and 11 Hessian eigenvectors respectively are enough to fully describe the corresponding processes.

KW - hep-ph

KW - hep-ex

UR - https://arxiv.org/abs/1602.00005

M3 - Article

JO - arXiv.org

JF - arXiv.org

SN - 2331-8422

ER -