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- Timestamp:
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Oct 8, 2013, 3:55:10 PM (11 years ago)
- Author:
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jkaspar
- Comment:
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v6
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v7
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| 11 | 11 | Implemented in class `BHModel` (see in [[http://elegent.hepforge.org/doxygen/classElegent_1_1BHModel.html|Doxygen]]). |
| 12 | 12 | |
| 13 | | There are two issues in the current implementation. First, the definition of `N_g` is incompatible between ![1] and ![2]. The one from ![1] seems correct. Second, using Eq. (478) from ![2] does not give reasonable dsigma/dt. However, if a factor of 1/2 is applied to the r.h.s. (see `BHModel::chi_without_i`) the results overlap with the published predictions from the original authors. There is an ongoing discussion with the authors in order to solve both issues. |
| | 13 | There have been two issues discovered when implementing the model. |
| | 14 | |
| | 15 | 1. The definition of `N_g` is inconsistent between ![1] and ![2]. As confirmed in private communication with the authors, the correct normalisation is such that the average x carried by the gluons is 1/2 - which is the case of the value published in ![1]. |
| | 16 | 1. Using Eq. (478) from ![2] does not give reasonable dsigma/dt. However, if a factor of 1/2 is applied to the r.h.s. (see `BHModel::chi_without_i`) the results overlap with the published predictions from the original authors (see a [[https://elegent.hepforge.org/comparisons/bh/bh_comparison.pdf|test sheet]] with Elegent calculations in green). It is possible that the 1/2 factor was omitted due to confusion with the other 1/2 factor mentioned in point 1. |
