| 1 | (* Content-type: application/mathematica *)
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| 2 |
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| 3 | (*** Wolfram Notebook File ***)
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| 4 | (* http://www.wolfram.com/nb *)
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| 20 | (* Beginning of Notebook Content *)
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| 21 | Notebook[{
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| 22 |
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| 23 | Cell[CellGroupData[{
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| 24 | Cell["\<\
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| 25 | The Drell-Yan cross-section in the narrow width approximation\
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| 26 | \>", "Title",
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| 99 | Cell["\<\
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| 100 | where
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| 101 |
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| 102 | * \[CapitalGamma]ud is the partial width of the W into u d
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| 103 | * \[CapitalGamma]ev is the partial width of the W into e \[Nu]
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| 104 | *\[CapitalGamma]tot is the totel width
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| 105 |
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| 106 | At tree-level, we can write approximatively
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| 107 |
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| 108 | \[CapitalGamma]ev = \[CapitalGamma]
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| 109 | \[CapitalGamma]ud = 3 \[CapitalGamma]
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