Jet cone sizes : Standardize between ATLAS and CMS? N. Saoulidou, University of Athens, Greece & S.Lee, Texas Tech. University, USA N. Saoulidou, S. Lee 1
Common cone sizes • Everyone agrees that it would be nice to have common jet cone – sizes between ATLAS and CMS. • We can have a common “default” set (or sets) for : – Precisions measurements – Substructure measurements and their application to other topics – New physics (NP) searches N. Saoulidou, S. Lee 2
CMS proposal (1) • Would be nice to : – Concentrate around a “small” and a “big” cone size with one algorithm to have as a default set. Pick a few values like AK 0.3-0.4-0.5 and AK 0.8-0.9-1.0 – Collect input from all PAGs and POGs in terms of studies they already have done favoring one cone-size vs another, or studies they wish to conduct. – Define a set of key studies for SM measurements, jet substructure measurements, and NP searches that will show which cone size is best and define a timescale for these studies to be completed along with the people that will conduct them. N. Saoulidou, S. Lee 3
CMS proposal (2) • Would be nice : – After the studies are completed, have another meeting in which results will be shown, compared and discussed among the two collaborations. – Define for which datasets these criteria will apply (proposal 2014 onwards) N. Saoulidou, S. Lee 4
CMS proposal (3) • Set of studies for SM measurements with different cone- sizes – Measurement of W mass with and without the use of boosted objects – Measurement of top mass with and without the use of boosted objects. – Study of semi-leptonic Higgs or Higgs to bbar measurements N. Saoulidou, S. Lee 5
CMS proposal (4) • Set of studies for jet substructure tools: – Perform studies of efficiency for finding boosted objects (etc) for different large AK and CA cone sizes. – Abandon CA algorithm (? To be discussed) – Hear more on the dedicated talk. N. Saoulidou, S. Lee 6
Thank you! N. Saoulidou, S. Lee 7
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