Monday, October 24, 2016

New ATLAS top quark mass measurements

ATLAS has released new top quark mass measurements using the dilepton and all hadronic channels.

The measurement in the all hadronic channel is:
mtop = 173.80 ± 0.55(stat.) ± 1.01(syst.) GeV is measured, where the systematic uncertainty is dominated by the hadronization modelling (0.64 GeV) and the jet energy scale (0.60 GeV).
The measurement in the dilepton channel is:
mtop = 172.99 ± 0.41(stat.) ± 0.74(syst.) GeV is obtained, where the systematic uncertainty is dominated by the jet energy scale (0.54 GeV). 
This result is combined with the ATLAS top-quark mass measurements in the single-lepton and dilepton channels performed at √ s = 7 TeV [4] using the Best Linear Unbiased Estimate method [5]. The combined measurement gives a combined top-quark mass value of: mtop = 172.84 ± 0.34(stat.) ± 0.61(syst.) GeV. 
A new CMS measurement of the top quark mass in a new channel with low precision was released in August.  A new CMS measurement of the top quark mass in an old, more precise channel was released in March.

3 comments:

bellbeakerblogger said...

I added you back into my sidebar. Blogger is acting up, trying to fix things.

andrew said...

Thanks! I appreciate it, but you are, of course, welcome to decide which links to put up in your blog as you see fit.

bellbeakerblogger said...

Blogger deleted all of my links and I lost two gadgets as well. I had to manually put in every blog, and I'm still missing two or three. Could have been operator error, who knows.