The effects of O(α2) initial state QED corrections to e+e− → γ⁎/Z⁎ at very high luminosity colliders
We present numerical results on the recently completed O(α2) initial state corrections to the process e+e−→γ⁎/Z⁎, which is a central process at past and future high energy and high luminosity colliders for precision measurements of the properties of the Z-boson, the Higgs boson, and the top quark. W...
| Glavni autori: | , , , |
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| Format: | Članak |
| Jezik: | English |
| Izdano: |
Elsevier
2020-02-01
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| Serija: | Physics Letters B |
| Online pristup: | http://www.sciencedirect.com/science/article/pii/S0370269319309189 |
| _version_ | 1831846958629650432 |
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| author | J. Blümlein A. De Freitas C.G. Raab K. Schönwald |
| author_facet | J. Blümlein A. De Freitas C.G. Raab K. Schönwald |
| author_sort | J. Blümlein |
| collection | DOAJ |
| description | We present numerical results on the recently completed O(α2) initial state corrections to the process e+e−→γ⁎/Z⁎, which is a central process at past and future high energy and high luminosity colliders for precision measurements of the properties of the Z-boson, the Higgs boson, and the top quark. We observe differences to an earlier result [1] in the non-logarithmic contributions at O(α2). The new result leads to a 4 MeV shift in the Z width considering the lower end s0=4mτ2 of the radiation region, which is larger than the present accuracy. A corresponding cut to s0/s=0.01 only implies a shift of 0.2 MeV. We present predictions on the radiative corrections to the central processes e+e−→γ⁎/Z⁎, e+e−→ZH and e+e−→tt‾ planned at future colliders like the ILC, CLIC, FCC_ee and CEPC to measure the mass and the width of the Z boson, the Higgs boson and the top quark, for which the present corrections are significant. |
| first_indexed | 2024-12-23T08:09:19Z |
| format | Article |
| id | doaj.art-d596f79a2b4a402dbb1e3b75af3a9d30 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-23T08:09:19Z |
| publishDate | 2020-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-d596f79a2b4a402dbb1e3b75af3a9d302022-12-21T17:54:26ZengElsevierPhysics Letters B0370-26932020-02-01801The effects of O(α2) initial state QED corrections to e+e− → γ⁎/Z⁎ at very high luminosity collidersJ. Blümlein0A. De Freitas1C.G. Raab2K. Schönwald3Deutsches Elektronen–Synchrotron, DESY, Platanenallee 6, D–15738 Zeuthen, Germany; Corresponding author.Deutsches Elektronen–Synchrotron, DESY, Platanenallee 6, D–15738 Zeuthen, GermanyInstitute of Algebra, Johannes Kepler University, Altenbergerstraße 69, A–4040, Linz, AustriaDeutsches Elektronen–Synchrotron, DESY, Platanenallee 6, D–15738 Zeuthen, Germany; Institut für Theoretische Teilchenphysik, Karlsruher Institut für Technologie (KIT), D-76128 Karlsruhe, GermanyWe present numerical results on the recently completed O(α2) initial state corrections to the process e+e−→γ⁎/Z⁎, which is a central process at past and future high energy and high luminosity colliders for precision measurements of the properties of the Z-boson, the Higgs boson, and the top quark. We observe differences to an earlier result [1] in the non-logarithmic contributions at O(α2). The new result leads to a 4 MeV shift in the Z width considering the lower end s0=4mτ2 of the radiation region, which is larger than the present accuracy. A corresponding cut to s0/s=0.01 only implies a shift of 0.2 MeV. We present predictions on the radiative corrections to the central processes e+e−→γ⁎/Z⁎, e+e−→ZH and e+e−→tt‾ planned at future colliders like the ILC, CLIC, FCC_ee and CEPC to measure the mass and the width of the Z boson, the Higgs boson and the top quark, for which the present corrections are significant.http://www.sciencedirect.com/science/article/pii/S0370269319309189 |
| spellingShingle | J. Blümlein A. De Freitas C.G. Raab K. Schönwald The effects of O(α2) initial state QED corrections to e+e− → γ⁎/Z⁎ at very high luminosity colliders Physics Letters B |
| title | The effects of O(α2) initial state QED corrections to e+e− → γ⁎/Z⁎ at very high luminosity colliders |
| title_full | The effects of O(α2) initial state QED corrections to e+e− → γ⁎/Z⁎ at very high luminosity colliders |
| title_fullStr | The effects of O(α2) initial state QED corrections to e+e− → γ⁎/Z⁎ at very high luminosity colliders |
| title_full_unstemmed | The effects of O(α2) initial state QED corrections to e+e− → γ⁎/Z⁎ at very high luminosity colliders |
| title_short | The effects of O(α2) initial state QED corrections to e+e− → γ⁎/Z⁎ at very high luminosity colliders |
| title_sort | effects of o α2 initial state qed corrections to e e γ z at very high luminosity colliders |
| url | http://www.sciencedirect.com/science/article/pii/S0370269319309189 |
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