2017:working_groups:scales
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2017:working_groups:scales [2017/06/09 15:50] gudrun.heinrich |
2017:working_groups:scales [2017/06/20 16:41] (current) mario.campanelli |
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| - | + | ====== LH Accord for scale variations ====== | |
| - | * LH Accord for scale variations? [discussion on: **Thu June 8th, 09h00-10h30**] | + | People: João Pires, Kostas Theofilatos, Joey Huston, Mario Campanelli ... (**add your name** if you are interested) |
| - | * test case e.g. jet-veto cross section in Drell-Yan (+ N jets) | + | |
| + | |||
| + | ===== Notes from the discussion in LH ===== | ||
| + | Slides: [[:2017:scales_pires.pdf | scale choices]] | ||
| + | |||
| + | * decompose inclusive PT distributions to the sum of PT1, PT2, PT3, PT4+ (possible follow-up from the planned experimental measurements), (award is: bet of free coffee from Daniel Maitre) | ||
| + | * what about other scales HT/2 | ||
| + | * cone size dependences | ||
| + | * Gregors Soyez suggestion for DR-informed scale varition for large and small anglularly separated jets (?) [to be further clarified] | ||
| + | |||
| + | ===For more details, see the notes for the Fixed Order vs ME+PS comparisons for inclusive jets ==== | ||
| + | |||
| + | ====Scale choices in ratios==== | ||
| + | *understand degree of scale cancellations in ratios of cross sections by comparing NLO predictions with corresponding NNLO ones, i.e. W+>=1 jet/Z+>=1 jet, H+>=1 jet/Z+>=1 jet at NLO and at NNLO, using same central scale and variations about that scale | ||
| + | ===sub-set of questions from Cambridge Scales workshop:=== | ||
| + | *Ratios of cross sections; we can categorize situations where the choice of the same (or similar) scale for the numerator and denominator is warranted; in order of strength of validity -ratio of same cross section at different energies | ||
| + | *ratio of same cross section at different rapidities | ||
| + | *ratio of n/n-1 jet cross sections | ||
| + | *ratio of X+n jet/Y+ n jet, where X and Y are similar, i.e. W and Z | ||
| + | *ratio of X+n jet/Y+ n jet, where X and Y are dissimilar, i.e. W and H | ||
2017/working_groups/scales.1497016242.txt.gz · Last modified: 2017/06/09 15:50 by gudrun.heinrich
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