Measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s = 13TeV with the ATLAS detector
The inclusive top quark pair (tt ¯) production cross-section σtt ¯ has been measured in proton–proton collisions at √s = 13 TeV, using 36.1 fb−1 of data collected in 2015–2016 by the ATLAS experiment at the LHC. Using events with an opposite-charge eμ pair and b-tagged jets, the cross-section is mea...
Guardado en:
| Autores principales: | , , , , , , , |
|---|---|
| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2020
|
| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/125370 |
| Aporte de: |
| id |
I19-R120-10915-125370 |
|---|---|
| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Física Elementary particle Particle physics Quantum chromodynamics Physics Particle decay Antiparticle Muon Top quark Pair production Boson |
| spellingShingle |
Física Elementary particle Particle physics Quantum chromodynamics Physics Particle decay Antiparticle Muon Top quark Pair production Boson Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Hoya, Joaquín Monticelli, Fernando Gabriel Orellana, Gonzalo Enrique Wahlberg, Hernán Pablo The ATLAS Collaboration Measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s = 13TeV with the ATLAS detector |
| topic_facet |
Física Elementary particle Particle physics Quantum chromodynamics Physics Particle decay Antiparticle Muon Top quark Pair production Boson |
| description |
The inclusive top quark pair (tt ¯) production cross-section σtt ¯ has been measured in proton–proton collisions at √s = 13 TeV, using 36.1 fb−1 of data collected in 2015–2016 by the ATLAS experiment at the LHC. Using events with an opposite-charge eμ pair and b-tagged jets, the cross-section is measured to be:
σtt ¯ = 826.4 ± 3.6 (stat) ± 11.5 (syst) ± 15.7 (lumi) ±1.9 (beam) pb,
where the uncertainties reflect the limited size of the data sample, experimental and theoretical systematic effects, the integrated luminosity, and the LHC beam energy, giving a total uncertainty of 2.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. It is used to determine the top quark pole mass via the dependence of the predicted cross-section on mpole t , giving mpole t = 173.1+2.0 −2.1 GeV. It is also combined with measurements at √s = 7 TeV and √s = 8 TeV to derive ratios and double ratios of tt ¯ and Z cross-sections at different energies. The same event sample is used to measure absolute and normalised differential cross-sections as functions of singlelepton and dilepton kinematic variables, and the results are compared with predictions from various Monte Carlo event generators. |
| format |
Articulo Articulo |
| author |
Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Hoya, Joaquín Monticelli, Fernando Gabriel Orellana, Gonzalo Enrique Wahlberg, Hernán Pablo The ATLAS Collaboration |
| author_facet |
Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Hoya, Joaquín Monticelli, Fernando Gabriel Orellana, Gonzalo Enrique Wahlberg, Hernán Pablo The ATLAS Collaboration |
| author_sort |
Alonso, Francisco |
| title |
Measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s = 13TeV with the ATLAS detector |
| title_short |
Measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s = 13TeV with the ATLAS detector |
| title_full |
Measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s = 13TeV with the ATLAS detector |
| title_fullStr |
Measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s = 13TeV with the ATLAS detector |
| title_full_unstemmed |
Measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s = 13TeV with the ATLAS detector |
| title_sort |
measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s = 13tev with the atlas detector |
| publishDate |
2020 |
| url |
http://sedici.unlp.edu.ar/handle/10915/125370 |
| work_keys_str_mv |
AT alonsofrancisco measurementofthettproductioncrosssectionandleptondifferentialdistributionsinemdileptoneventsfromppcollisionsats13tevwiththeatlasdetector AT arduhfranciscoanuar measurementofthettproductioncrosssectionandleptondifferentialdistributionsinemdileptoneventsfromppcollisionsats13tevwiththeatlasdetector AT dovamariateresa measurementofthettproductioncrosssectionandleptondifferentialdistributionsinemdileptoneventsfromppcollisionsats13tevwiththeatlasdetector AT hoyajoaquin measurementofthettproductioncrosssectionandleptondifferentialdistributionsinemdileptoneventsfromppcollisionsats13tevwiththeatlasdetector AT monticellifernandogabriel measurementofthettproductioncrosssectionandleptondifferentialdistributionsinemdileptoneventsfromppcollisionsats13tevwiththeatlasdetector AT orellanagonzaloenrique measurementofthettproductioncrosssectionandleptondifferentialdistributionsinemdileptoneventsfromppcollisionsats13tevwiththeatlasdetector AT wahlberghernanpablo measurementofthettproductioncrosssectionandleptondifferentialdistributionsinemdileptoneventsfromppcollisionsats13tevwiththeatlasdetector AT theatlascollaboration measurementofthettproductioncrosssectionandleptondifferentialdistributionsinemdileptoneventsfromppcollisionsats13tevwiththeatlasdetector |
| bdutipo_str |
Repositorios |
| _version_ |
1764820451564978177 |