NNLO PDFs driven by top-quark data
Abstract We study the impact of state-of-the-art top-quark data collected at the large hadron collider on parton distribution functions (PDFs). Following the ABMP methodology, the fit extracts simultaneously proton PDFs, the strong coupling $$\alpha _s(M_Z)$$ α s ( M Z ) and heavy-quark masses at ne...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-02-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-13832-8 |
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| author | S. Alekhin M. V. Garzelli S.-O. Moch O. Zenaiev |
| author_facet | S. Alekhin M. V. Garzelli S.-O. Moch O. Zenaiev |
| author_sort | S. Alekhin |
| collection | DOAJ |
| description | Abstract We study the impact of state-of-the-art top-quark data collected at the large hadron collider on parton distribution functions (PDFs). Following the ABMP methodology, the fit extracts simultaneously proton PDFs, the strong coupling $$\alpha _s(M_Z)$$ α s ( M Z ) and heavy-quark masses at next-to-next-to-leading order (NNLO) accuracy in QCD. It includes recent high-statistics data on absolute total inclusive cross sections for $$t\bar{t}+X$$ t t ¯ + X , the sum of $$(t + X)$$ ( t + X ) and $$(\bar{t} + X)$$ ( t ¯ + X ) hadroproduction, and normalized inclusive data double-differential in the invariant mass and rapidity of the $$t\bar{t}$$ t t ¯ pair at $$\sqrt{S}=13$$ S = 13 TeV. The gluon PDF at large x and the top-quark mass value derived from these data are well compatible with the previous ABMP16 results, but with significantly smaller uncertainties, reduced by up to a factor of two. At NNLO in QCD we obtain for the strong coupling the value $$\alpha _s^{(n_f=5)}(M_Z)= 0.1150 \pm 0.0009$$ α s ( n f = 5 ) ( M Z ) = 0.1150 ± 0.0009 and for the top-quark mass in the $${\overline{\text{ MS }}}$$ MS ¯ -scheme $$m_t(m_t) = 160.6 \pm 0.6$$ m t ( m t ) = 160.6 ± 0.6 GeV, corresponding to $$m_t^\textrm{pole} = 170.2 \pm 0.7$$ m t pole = 170.2 ± 0.7 GeV in the on-shell scheme. The new fit, dubbed ABMPtt, is publicly released in grids in LHAPDF format. |
| format | Article |
| id | doaj-art-0434a32445ab443b9366ef5a24fd422b |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-0434a32445ab443b9366ef5a24fd422b2025-02-09T12:51:32ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-02-0185212510.1140/epjc/s10052-025-13832-8NNLO PDFs driven by top-quark dataS. Alekhin0M. V. Garzelli1S.-O. Moch2O. Zenaiev3II. Institut für Theoretische Physik, Universität HamburgII. Institut für Theoretische Physik, Universität HamburgII. Institut für Theoretische Physik, Universität HamburgII. Institut für Theoretische Physik, Universität HamburgAbstract We study the impact of state-of-the-art top-quark data collected at the large hadron collider on parton distribution functions (PDFs). Following the ABMP methodology, the fit extracts simultaneously proton PDFs, the strong coupling $$\alpha _s(M_Z)$$ α s ( M Z ) and heavy-quark masses at next-to-next-to-leading order (NNLO) accuracy in QCD. It includes recent high-statistics data on absolute total inclusive cross sections for $$t\bar{t}+X$$ t t ¯ + X , the sum of $$(t + X)$$ ( t + X ) and $$(\bar{t} + X)$$ ( t ¯ + X ) hadroproduction, and normalized inclusive data double-differential in the invariant mass and rapidity of the $$t\bar{t}$$ t t ¯ pair at $$\sqrt{S}=13$$ S = 13 TeV. The gluon PDF at large x and the top-quark mass value derived from these data are well compatible with the previous ABMP16 results, but with significantly smaller uncertainties, reduced by up to a factor of two. At NNLO in QCD we obtain for the strong coupling the value $$\alpha _s^{(n_f=5)}(M_Z)= 0.1150 \pm 0.0009$$ α s ( n f = 5 ) ( M Z ) = 0.1150 ± 0.0009 and for the top-quark mass in the $${\overline{\text{ MS }}}$$ MS ¯ -scheme $$m_t(m_t) = 160.6 \pm 0.6$$ m t ( m t ) = 160.6 ± 0.6 GeV, corresponding to $$m_t^\textrm{pole} = 170.2 \pm 0.7$$ m t pole = 170.2 ± 0.7 GeV in the on-shell scheme. The new fit, dubbed ABMPtt, is publicly released in grids in LHAPDF format.https://doi.org/10.1140/epjc/s10052-025-13832-8 |
| spellingShingle | S. Alekhin M. V. Garzelli S.-O. Moch O. Zenaiev NNLO PDFs driven by top-quark data European Physical Journal C: Particles and Fields |
| title | NNLO PDFs driven by top-quark data |
| title_full | NNLO PDFs driven by top-quark data |
| title_fullStr | NNLO PDFs driven by top-quark data |
| title_full_unstemmed | NNLO PDFs driven by top-quark data |
| title_short | NNLO PDFs driven by top-quark data |
| title_sort | nnlo pdfs driven by top quark data |
| url | https://doi.org/10.1140/epjc/s10052-025-13832-8 |
| work_keys_str_mv | AT salekhin nnlopdfsdrivenbytopquarkdata AT mvgarzelli nnlopdfsdrivenbytopquarkdata AT somoch nnlopdfsdrivenbytopquarkdata AT ozenaiev nnlopdfsdrivenbytopquarkdata |