O(αs2) polarized heavy flavor corrections to deep-inelastic scattering at Q2 ≫ m2
We calculate the quarkonic O(αs2) massive operator matrix elements ΔAQg(N),ΔAQqPS(N) and ΔAqq,QNS(N) for the twist–2 operators and the associated heavy flavor Wilson coefficients in polarized deeply inelastic scattering in the region Q2≫m2 to O(ε) in the case of the inclusive heavy flavor contributi...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Nuclear Physics B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0550321323000433 |
| _version_ | 1797894719970213888 |
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| author | I. Bierenbaum J. Blümlein A. De Freitas A. Goedicke S. Klein K. Schönwald |
| author_facet | I. Bierenbaum J. Blümlein A. De Freitas A. Goedicke S. Klein K. Schönwald |
| author_sort | I. Bierenbaum |
| collection | DOAJ |
| description | We calculate the quarkonic O(αs2) massive operator matrix elements ΔAQg(N),ΔAQqPS(N) and ΔAqq,QNS(N) for the twist–2 operators and the associated heavy flavor Wilson coefficients in polarized deeply inelastic scattering in the region Q2≫m2 to O(ε) in the case of the inclusive heavy flavor contributions. The evaluation is performed in Mellin space, without applying the integration-by-parts method. The result is given in terms of harmonic sums. This leads to a significant compactification of the operator matrix elements and massive Wilson coefficients in the region Q2≫m2 derived previously in [1], which we partly confirm, and also partly correct. The results allow to determine the heavy flavor Wilson coefficients for g1(x,Q2) to O(αs2) for all but the power suppressed terms ∝(m2/Q2)k,k≥1. The results in momentum fraction z-space are also presented. We also discuss the small x effects in the polarized case. Numerical results are presented. We also compute the gluonic matching coefficients in the two–mass variable flavor number scheme to O(ε). |
| first_indexed | 2024-04-10T07:13:47Z |
| format | Article |
| id | doaj.art-2da5aa9d2c3f471a9a90c3f8f671336b |
| institution | Directory Open Access Journal |
| issn | 0550-3213 |
| language | English |
| last_indexed | 2024-04-10T07:13:47Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Physics B |
| spelling | doaj.art-2da5aa9d2c3f471a9a90c3f8f671336b2023-02-26T04:26:14ZengElsevierNuclear Physics B0550-32132023-03-01988116114O(αs2) polarized heavy flavor corrections to deep-inelastic scattering at Q2 ≫ m2I. Bierenbaum0J. Blümlein1A. De Freitas2A. Goedicke3S. Klein4K. Schönwald5Deutsches Elektronen–Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, GermanyDeutsches Elektronen–Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany; Corresponding author.Deutsches Elektronen–Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany; Johannes Kepler University Linz, Research Institute for Symbolic Computation (RISC), Altenbergerstraß e 69, A-4040, Linz, AustriaDeutsches Elektronen–Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, GermanyDeutsches Elektronen–Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, GermanyDeutsches Elektronen–Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany; Institut für Theoretische Teilchenphysik, Karlsruher Institut für Technologie (KIT), D-76128 Karlsruhe, Germany; Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, SwitzerlandWe calculate the quarkonic O(αs2) massive operator matrix elements ΔAQg(N),ΔAQqPS(N) and ΔAqq,QNS(N) for the twist–2 operators and the associated heavy flavor Wilson coefficients in polarized deeply inelastic scattering in the region Q2≫m2 to O(ε) in the case of the inclusive heavy flavor contributions. The evaluation is performed in Mellin space, without applying the integration-by-parts method. The result is given in terms of harmonic sums. This leads to a significant compactification of the operator matrix elements and massive Wilson coefficients in the region Q2≫m2 derived previously in [1], which we partly confirm, and also partly correct. The results allow to determine the heavy flavor Wilson coefficients for g1(x,Q2) to O(αs2) for all but the power suppressed terms ∝(m2/Q2)k,k≥1. The results in momentum fraction z-space are also presented. We also discuss the small x effects in the polarized case. Numerical results are presented. We also compute the gluonic matching coefficients in the two–mass variable flavor number scheme to O(ε).http://www.sciencedirect.com/science/article/pii/S0550321323000433 |
| spellingShingle | I. Bierenbaum J. Blümlein A. De Freitas A. Goedicke S. Klein K. Schönwald O(αs2) polarized heavy flavor corrections to deep-inelastic scattering at Q2 ≫ m2 Nuclear Physics B |
| title | O(αs2) polarized heavy flavor corrections to deep-inelastic scattering at Q2 ≫ m2 |
| title_full | O(αs2) polarized heavy flavor corrections to deep-inelastic scattering at Q2 ≫ m2 |
| title_fullStr | O(αs2) polarized heavy flavor corrections to deep-inelastic scattering at Q2 ≫ m2 |
| title_full_unstemmed | O(αs2) polarized heavy flavor corrections to deep-inelastic scattering at Q2 ≫ m2 |
| title_short | O(αs2) polarized heavy flavor corrections to deep-inelastic scattering at Q2 ≫ m2 |
| title_sort | o αs2 polarized heavy flavor corrections to deep inelastic scattering at q2 m2 |
| url | http://www.sciencedirect.com/science/article/pii/S0550321323000433 |
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