Logo image
Observation of t(t)over-bar production in the lepton plus jets and dilepton channels in p plus Pb collisions at √sNN=8.16 TeV with the ATLAS detector
期刊文章   同儕審查

Observation of t(t)over-bar production in the lepton plus jets and dilepton channels in p plus Pb collisions at √sNN=8.16 TeV with the ATLAS detector

G. Aad, E. Aakvaag, B. Abbott, S. Abdelhameed, K. Abeling, N. J. Abicht, S. H. Abidi, M. Aboelela, A. Aboulhorma, H. Abramowicz, …
The journal of high energy physics, (11), 101
19/11/2024
Web of Science ID: WOS:001410240700001

摘要

Physical Sciences Physics Physics, Particles & Fields Science & Technology
This paper reports the observation of top-quark pair production in proton-lead collisions in the ATLAS experiment at the Large Hadron Collider. The measurement is performed using 165 nb(-1) of p+Pb data collected at root sNN = 8.16TeV in 2016. Events are categorised in two analysis channels, consisting of either events with exactly one lepton (electron or muon) and at least four jets, or events with two opposite-charge leptons and at least two jets. In both channels at least one b-tagged jet is also required. Top-quark pair production is observed with a significance over five standard deviations in each channel. The top-quark pair production cross-section is measured to be sigma (tt) = 58.1 +/- 2.0 (stat.) (+4.8) (-4.4) (syst.) nb, with a total uncertainty of 9%. In addition, the nuclear modification factor is measured to be R(p)A = 1.090 +/- 0.039 (stat.) (+0.094) (-0.087) (syst.). The measurements are found to be in good agreement with theory predictions involving nuclear parton distribution functions.

檔案與連結 (1)

url
https://doi.org/10.1007/JHEP11(2024)101檢視
已出版(紀錄版本) 開放

相關連結

詳細資料

Logo image