Reweighting and unweighting of parton distributions and the LHC W lepton asymmetry data
We develop in more detail our reweighting method for incorporating new datasets in parton fits based on a Monte Carlo representation of PDFs. After revisiting the derivation of the reweighting formula, we show how to construct an unweighted PDF replica set which is statistically equivalent to a give...
| Päätekijät: | , , , , , , , , , |
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| Aineistotyyppi: | Journal article |
| Kieli: | English |
| Julkaistu: |
2012
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| _version_ | 1826292860783165440 |
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| author | Ball, R Bertone, V Cerutti, F Del Debbio, L Forte, S Guffanti, A Hartland, N Latorre, J Rojo, J Ubiali, M |
| author_facet | Ball, R Bertone, V Cerutti, F Del Debbio, L Forte, S Guffanti, A Hartland, N Latorre, J Rojo, J Ubiali, M |
| author_sort | Ball, R |
| collection | OXFORD |
| description | We develop in more detail our reweighting method for incorporating new datasets in parton fits based on a Monte Carlo representation of PDFs. After revisiting the derivation of the reweighting formula, we show how to construct an unweighted PDF replica set which is statistically equivalent to a given reweighted set. We then use reweighting followed by unweighting to test the consistency of the method, specifically by verifying that results do not depend on the order in which new data are included in the fit via reweighting. We apply the reweighting method to study the impact of LHC W lepton asymmetry data on the NNPDF2.1 set. We show how these data reduce the PDF uncertainties of light quarks in the medium and small x region, providing the first solid constraints on PDFs from LHC data. © 2011 Elsevier B.V. |
| first_indexed | 2024-03-07T03:21:12Z |
| format | Journal article |
| id | oxford-uuid:b77f3e8f-3b93-472c-ac75-70afd8b8f70c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:21:12Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:b77f3e8f-3b93-472c-ac75-70afd8b8f70c2022-03-27T04:49:01ZReweighting and unweighting of parton distributions and the LHC W lepton asymmetry dataJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b77f3e8f-3b93-472c-ac75-70afd8b8f70cEnglishSymplectic Elements at Oxford2012Ball, RBertone, VCerutti, FDel Debbio, LForte, SGuffanti, AHartland, NLatorre, JRojo, JUbiali, MWe develop in more detail our reweighting method for incorporating new datasets in parton fits based on a Monte Carlo representation of PDFs. After revisiting the derivation of the reweighting formula, we show how to construct an unweighted PDF replica set which is statistically equivalent to a given reweighted set. We then use reweighting followed by unweighting to test the consistency of the method, specifically by verifying that results do not depend on the order in which new data are included in the fit via reweighting. We apply the reweighting method to study the impact of LHC W lepton asymmetry data on the NNPDF2.1 set. We show how these data reduce the PDF uncertainties of light quarks in the medium and small x region, providing the first solid constraints on PDFs from LHC data. © 2011 Elsevier B.V. |
| spellingShingle | Ball, R Bertone, V Cerutti, F Del Debbio, L Forte, S Guffanti, A Hartland, N Latorre, J Rojo, J Ubiali, M Reweighting and unweighting of parton distributions and the LHC W lepton asymmetry data |
| title | Reweighting and unweighting of parton distributions and the LHC W lepton asymmetry data |
| title_full | Reweighting and unweighting of parton distributions and the LHC W lepton asymmetry data |
| title_fullStr | Reweighting and unweighting of parton distributions and the LHC W lepton asymmetry data |
| title_full_unstemmed | Reweighting and unweighting of parton distributions and the LHC W lepton asymmetry data |
| title_short | Reweighting and unweighting of parton distributions and the LHC W lepton asymmetry data |
| title_sort | reweighting and unweighting of parton distributions and the lhc w lepton asymmetry data |
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