Top-Antitop Production at Hadron Colliders

ggi.fi.infn.it

Top-Antitop Production at Hadron Colliders

NLO+NLL Theoretical Prediction

TEVATRON

σ NLO+NLL (Tev, m

t¯t

t = 171 GeV,CTEQ6.5) = 7.61 +0.30(3.9%)

−0.53(6.9%)

(scales)

+0.53(7%)

−0.36(4.8%)

(PDFs) pb

LHC

σ NLO+NLL (LHC, m

t¯t

t = 171 GeV,CTEQ6.5) = 908 +82(9.0%)

−85(9.3%)

(scales)

+30(3.3%)

−29(3.2%)

(PDFs) pb

M. Cacciari, S. Frixione, M. Mangano, P. Nason, and G. Ridolfi, JHEP 0809:127,2008

12

10

σ pp

– → tt

- [pb] at Tevatron

1400

1200

σ pp → tt

- [pb] at LHC

8

6

4

1000

800

600

400

2

NLL res (CTEQ65)

200

NLL res (CTEQ65)

0

165 170 175 180

m t

[GeV]

0

165 170 175 180

m t

[GeV]

S. Moch and P. Uwer, Phys. Rev. D 78 (2008) 034003

HP2.3rd GGI-Florence, September 15, 2010 – p.13/25

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