Aad, G. and Abbott, B. and Abdallah, J. and Khalek, S. A. and Abdinov, O. and Krasznahorkay, Attila and Nagai, Yoshikazu and Pásztor, Gabriella and Tóth, József (2015) Simultaneous measurements of the t¯t, W +W −, and Z/γ∗ → τ τ production cross-sections in pp collisions at√s = 7 TeV with the ATLAS detector. PHYSICAL REVIEW D, 91 (5). ISSN 2470-0010
|
Text
1407.0573.pdf Available under License Creative Commons Attribution. Download (767kB) | Preview |
Abstract
Simultaneous measurements of the t¯t, W +W −, and Z/γ∗ → τ τ production cross-sections using an integrated luminosity of 4.6 fb−1 of pp collisions at √s = 7 TeV collected by the ATLAS detector at the LHC are presented. Events are selected with two high transverse momentum leptons consisting of an oppositely charged electron and muon pair. The three processes are separated using the distribu- tions of the missing transverse momentum of events with zero and greater than zero jet multiplicities. Measurements of the fiducial cross-section are presented along with results that quantify for the first time the underlying correlations in the predicted and measured cross-sections due to proton parton distribution functions. These results indicate that the correlated NLO predictions for t¯t and Z/γ∗ → τ τ underestimate the data, while those at NNLO generally describe the data well. The full cross-sections are measured to be σ(t¯t) = 181.2 ± 2.8+9.7 −9.5 ± 3.3 ± 3.3 pb, σ(W +W −) = 53.3 ± 2.7+7.3 −8.0 ± 1.0 ± 0.5 pb, and σ(Z/γ∗ → τ τ ) = 1174 ± 24+72 −87 ± 21 ± 9 pb, where the cited uncertainties are due to statistics, systematic effects, luminosity and the LHC beam energy measurement, respectively. The W +W − measurement includes the small contribution from Higgs boson decays, H → W +W −.
Item Type: | Article |
---|---|
Subjects: | Q Science / természettudomány > QC Physics / fizika |
SWORD Depositor: | MTMT SWORD |
Depositing User: | MTMT SWORD |
Date Deposited: | 20 Oct 2023 14:05 |
Last Modified: | 20 Oct 2023 14:05 |
URI: | http://real.mtak.hu/id/eprint/177354 |
Actions (login required)
![]() |
Edit Item |