Multiple ISR photons
Up to 2.1, the ISR treatment inserted two photons that swallowed all missing energy and longitudinal momentum, and got assigned pT if requested. In reality, the number of photons has a distribution. The calculation can also be done exactly, but needs quadruple precision.
Develop an (automatic, if possible) approach that generates a more realistic ISR photon distribution.
Change History (17)
| Milestone: |
v2.2.1 →
v2.2.2
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| Milestone: |
v2.2.3 →
v2.4.0
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| Milestone: |
v2.4.0 →
v2.5.0
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| Milestone: |
v2.5.0 →
v2.6.0
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| Milestone: |
v2.6.0 →
v2.6.1
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| Milestone: |
v2.6.1 →
v2.6.2
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| Milestone: |
v2.6.2 →
v2.6.3
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| Milestone: |
v2.6.3 →
v2.6.4
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| Milestone: |
v2.6.4 →
v2.6.5
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| Milestone: |
v2.6.5 →
v2.7.0
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| Milestone: |
v2.7.0 →
v2.7.1
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| Milestone: |
v2.7.1 →
v2.8.0
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| Milestone: |
v2.8.0 →
v2.8.1
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| Milestone: |
v2.8.1 →
v2.8.2
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| Milestone: |
v2.8.2 →
v2.8.3
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| Resolution: |
→ duplicate
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| Status: |
new →
closed
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Includes proper treatment of non-collinear recoil of QED ISR emission.