SLIDE 18 Top Properties from ATLAS
Chris Young (CERN), on behalf of ATLAS
Lepton Universality in W → lν - Fit & Results
◮ A fit is performed in 3 bins in pT x 8 bins in |d0| x 2 channels (e-µ,µ-µ). ◮ Good agreement is seen in the fitted distributions. ◮ The fitted value of R(τ/µ) is found to be; . R(τ/µ) = 0.992 ± 0.013 [±0.007 (stat) ± 0.011 (syst)] ◮ The most precise measurement to date (by a factor 2) and the SM prevails.
0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 | [mm]
µ
|d 0.9 0.95 1 1.05 Data / Pred. 1 10
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10 Events / 0.01 mm ATLAS Preliminary
= 13 TeV, 139 fb s Signal Region <20 GeV
µ T
, 10<p µ µ Post-Fit Data (top) µ Prompt (top) µ → τ (hadron decay) µ µ µ → Z τ τ → Z Other SM processes Uncertainty 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 | [mm]
µ
|d 0.9 0.95 1 1.05 Data / Pred. 1 10
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10
5
10 Events / 0.01 mm ATLAS Preliminary
= 13 TeV, 139 fb s Signal Region <20 GeV
µ T
, 10<p µ e Post-Fit Data (top) µ Prompt (top) µ → τ (hadron decay) µ τ τ → Z Other SM processes Uncertainty 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 | [mm]
µ
|d 0.9 0.95 1 1.05 Data / Pred. 1 10
2
10
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10
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10 Events / 0.01 mm ATLAS Preliminary
= 13 TeV, 139 fb s Signal Region <250 GeV
µ T
, 20<p µ e Post-Fit Data (top) µ Prompt (top) µ → τ (hadron decay) µ τ τ → Z Other SM processes Uncertainty 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 | [mm]
µ
|d 0.9 0.95 1 1.05 Data / Pred. 1 10
2
10
3
10
4
10
5
10
6
10 Events / 0.01 mm ATLAS Preliminary
= 13 TeV, 139 fb s Signal Region <250 GeV
µ T
, 20<p µ µ Post-Fit Data (top) µ Prompt (top) µ → τ (hadron decay) µ µ µ → Z τ τ → Z Other SM processes Uncertainty
0.8 0.9 1 1.1 1.2
) ν µ → BR(W ) ν τ → BR(W ) ν e → BR(W ) ν τ → BR(W ) ν e → BR(W ) ν µ → BR(W
ATLAS Preliminary
UA1 UA2 CDF D0 LHCb LEP ATLAS PDG averages
Z.Phys. C44 (1989) 15-61
J.Phys.G 34 (2007) 2457-2544, PRL. 68 (1992) 3398-3402
- PRL. 75 (1995) 1456, PRL. 84 (2000) 5710
JHEP 10 (2016) 030 Phys.Rept. 532 (2013) 119
- EPJC. 77 (2017) 367
- PRD. 98 (2018) 030001
ATLAS - this result
= 13 TeV, 139 fb s Statistical Error Systematic Error Total Error
0.8 0.9 1 1.1 1.2
) ν µ → BR(W ) ν τ → BR(W ) ν e → BR(W ) ν τ → BR(W ) ν e → BR(W ) ν µ → BR(W
ATLAS Preliminary
UA1 UA2 CDF D0 LHCb LEP ATLAS PDG averages
Z.Phys. C44 (1989) 15-61
J.Phys.G 34 (2007) 2457-2544, PRL. 68 (1992) 3398-3402
- PRL. 75 (1995) 1456, PRL. 84 (2000) 5710
JHEP 10 (2016) 030 Phys.Rept. 532 (2013) 119
- EPJC. 77 (2017) 367
- PRD. 98 (2018) 030001
ATLAS - this result
= 13 TeV, 139 fb s Statistical Error Systematic Error Total Error 18 / 19
