Jet cone sizes : Standardize between ATLAS and CMS? N. Saoulidou, - - PowerPoint PPT Presentation

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Jet cone sizes : Standardize between ATLAS and CMS?

• N. Saoulidou, University of Athens, Greece & S.Lee, Texas Tech. University, USA
• N. Saoulidou, S. Lee

• N. Saoulidou, S. Lee

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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

• ther topics

– New physics (NP) searches

• N. Saoulidou, S. Lee

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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

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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

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CMS proposal (3)

• Set of studies for SM measurements with different cone-

sizes

– Measurement of W mass with and without the use of boosted

• bjects

– Measurement of top mass with and without the use of boosted

• bjects.

– Study of semi-leptonic Higgs or Higgs to bbar measurements

• N. Saoulidou, S. Lee

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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

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Thank you!