Measurement of double-differential cross sections for top quark pair production in pp collisions at s√=8 TeV and impact on parton distribution functions
| dc.contributor.author | CMS Collaboration | |
| dc.date.accessioned | 2018-10-09T19:19:24Z | |
| dc.date.available | 2018-10-09T19:19:24Z | |
| dc.date.issued | 2017-07-11 | |
| dc.identifier.citation | Sirunyan, A.M., Tumasyan, A., Adam, W. et al. Eur. Phys. J. C (2017) 77: 459. https://doi.org/10.1140/epjc/s10052-017-4984-5 | en_US |
| dc.identifier.uri | http://hdl.handle.net/1808/26807 | |
| dc.description.abstract | Normalized double-differential cross sections for top quark pair (tt¯) production are measured in pp collisions at a centre-of-mass energy of 8TeV with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 19.7fb−1. The measurement is performed in the dilepton e±μ∓ final state. The tt¯ cross section is determined as a function of various pairs of observables characterizing the kinematics of the top quark and tt¯ system. The data are compared to calculations using perturbative quantum chromodynamics at next-to-leading and approximate next-to-next-to-leading orders. They are also compared to predictions of Monte Carlo event generators that complement fixed-order computations with parton showers, hadronization, and multiple-parton interactions. Overall agreement is observed with the predictions, which is improved when the latest global sets of proton parton distribution functions are used. The inclusion of the measured tt¯ cross sections in a fit of parametrized parton distribution functions is shown to have significant impact on the gluon distribution. | en_US |
| dc.publisher | SpringerOpen | en_US |
| dc.rights | © CERN for the benefit of the CMS collaboration 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. | en_US |
| dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_US |
| dc.title | Measurement of double-differential cross sections for top quark pair production in pp collisions at s√=8 TeV and impact on parton distribution functions | en_US |
| dc.type | Article | en_US |
| kusw.kudepartment | Physics and Astronomy | en_US |
| dc.identifier.doi | 10.1140/epjc/s10052-017-4984-5 | en_US |
| kusw.oaversion | Scholarly/refereed, publisher version | en_US |
| kusw.oapolicy | This item meets KU Open Access policy criteria. | en_US |
| dc.rights.accessrights | openAccess | en_US |
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Except where otherwise noted, this item's license is described as: © CERN for the benefit of the CMS collaboration 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
