Journal article
Measurement of the tt¯ production cross-section using eμ events with b-tagged jets in pp collisions at s=13TeV with the ATLAS detector
Physics Letters B, Vol.761(C), pp.136-157
2016
DOI: 10.1016/j.physletb.2016.08.019
Abstract
This paper describes a measurement of the inclusive top quark pair production cross-section (σtt¯) with a data sample of 3.2fb−1 of proton–proton collisions at a centre-of-mass energy of s=13TeV, collected in 2015 by the ATLAS detector at the LHC. This measurement uses events with an opposite-charge electron–muon pair in the final state. Jets containing b-quarks are tagged using an algorithm based on track impact parameters and reconstructed secondary vertices. The numbers of events with exactly one and exactly two b-tagged jets are counted and used to determine simultaneously σtt¯ and the efficiency to reconstruct and b-tag a jet from a top quark decay, thereby minimising the associated systematic uncertainties. The cross-section is measured to be:σtt¯=818±8(stat)±27(syst)±19(lumi)±12(beam) pb, where the four uncertainties arise from data statistics, experimental and theoretical systematic effects, the integrated luminosity and the LHC beam energy, giving a total relative uncertainty of 4.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. A fiducial measurement corresponding to the experimental acceptance of the leptons is also presented.
Details
- Title: Subtitle
- Measurement of the tt¯ production cross-section using eμ events with b-tagged jets in pp collisions at s=13TeV with the ATLAS detector
- Creators
- M Aaboud - Universite Mohammed Premier OujdaBengt Lund-Jensen - Partikel- och astropartikelfysikP. Edvin Sidebo - Partikel- och astropartikelfysikJonas Strandberg - Partikel- och astropartikelfysikL Zwalinski - CERNATLAS Collaboration
- Contributors
- U Mallik (Contributor) - University of Iowa, Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- Physics Letters B, Vol.761(C), pp.136-157
- DOI
- 10.1016/j.physletb.2016.08.019
- ISSN
- 0370-2693
- eISSN
- 1873-2445
- Grant note
- DOI: 10.13039/501100003074, name: ANPCyT; name: YerPhI; DOI: 10.13039/501100000923, name: ARC; DOI: 10.13039/501100003413, name: BMWFW; DOI: 10.13039/501100002428, name: FWF; DOI: 10.13039/100011590, name: ANAS; DOI: 10.13039/501100011724, name: SSTC; DOI: 10.13039/501100003593, name: CNPq; DOI: 10.13039/501100001807, name: FAPESP; DOI: 10.13039/501100000038, name: NSERC; name: NRC; name: CFI; DOI: 10.13039/100012470, name: CERN; DOI: 10.13039/501100002848, name: CONICYT; DOI: 10.13039/501100002367, name: CAS; DOI: 10.13039/501100002855, name: MOST; DOI: 10.13039/501100001809, name: NSFC; DOI: 10.13039/100007637, name: COLCIENCIAS; name: MSMT CR; name: MPO CR; name: VSC CR; DOI: 10.13039/501100001732, name: DNRF; name: DNSRC; name: IN2P3-CNRS; name: CEA-DSM/IRFU; DOI: 10.13039/501100004802, name: GNSF; DOI: 10.13039/501100002347, name: BMBF; name: HGF; DOI: 10.13039/501100004189, name: MPG; DOI: 10.13039/501100003448, name: GSRT; name: RGC; name: SAR; DOI: 10.13039/501100003977, name: ISF; DOI: 10.13039/501100005386, name: I-CORE; name: Benoziyo Center; DOI: 10.13039/501100004007, name: INFN; DOI: 10.13039/501100001700, name: MEXT; DOI: 10.13039/501100001691, name: JSPS; DOI: 10.13039/501100006319, name: CNRST; DOI: 10.13039/501100001712, name: FOM; DOI: 10.13039/501100003246, name: NWO; name: RCN; DOI: 10.13039/501100004569, name: MNiSW; DOI: 10.13039/501100004281, name: NCN; name: FCT; name: MNE/IFA; name: MES of Russia; DOI: 10.13039/501100013400, name: NRC KI; DOI: 10.13039/501100003822, name: JINR; name: MESTD; name: MSSR; DOI: 10.13039/100005393, name: ARRS; name: MIZŠ; name: DST/NRF; DOI: 10.13039/501100003329, name: MINECO; name: SRC; name: Wallenberg Foundation; name: SERI; DOI: 10.13039/501100001711, name: SNSF; name: Cantons of Bern and Geneva; name: MOST; DOI: 10.13039/100010440, name: TAEK; DOI: 10.13039/501100000271, name: STFC; DOI: 10.13039/100000015, name: DOE; DOI: 10.13039/100000001, name: NSF; DOI: 10.13039/501100007711, name: BCKDF; name: Canada Council; DOI: 10.13039/100008313, name: Canarie; name: CRC; DOI: 10.13039/501100003150, name: FQRNT; DOI: 10.13039/100008185, name: Ontario Innovation Trust; DOI: 10.13039/501100000781, name: ERC; DOI: 10.13039/501100004963, name: FP7; DOI: 10.13039/501100007601, name: Horizon 2020; DOI: 10.13039/100010665, name: Marie Skłodowska-Curie Actions; name: Investissements d'Avenir Labex and Idex; DOI: 10.13039/501100001665, name: ANR; name: Région Auvergne and Fondation Partager le Savoir; DOI: 10.13039/501100001659, name: DFG; DOI: 10.13039/100005156, name: AvH Foundation; name: EU-ESF; name: Greek NSRF; DOI: 10.13039/501100001742, name: BSF; DOI: 10.13039/501100001736, name: GIF; name: Minerva; name: BRF; DOI: 10.13039/501100002809, name: Generalitat de Catalunya; DOI: 10.13039/501100003359, name: Generalitat Valenciana; DOI: 10.13039/501100000288, name: Royal Society; DOI: 10.13039/501100000275, name: Leverhulme Trust; DOI: 10.13039/100008776, name: PIC; name: ASGC; DOI: 10.13039/100006231, name: BNL
- Language
- English
- Date published
- 2016
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199948302771
Metrics
7 Record Views