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  • Aad, G.Aix Marseille Univ, CPPM, CNRS IN2P3, Marseille, France. (author)

Measurement of the energy asymmetry in t(t)over-barj production at 13 TeV with the ATLAS experiment and interpretation in the SMEFT framework

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • 2022-04-28
  • Springer Nature,2022
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-474467
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-474467URI
  • https://doi.org/10.1140/epjc/s10052-022-10101-wDOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-312240URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • For complete list of authors see http://dx.doi.org/10.1140/epjc/s10052-022-10101-w
  • QC 20220516
  • A measurement of the energy asymmetry in jet-associated top-quark pair production is presented using 139 fb(-1) of data collected by the ATLAS detector at the Large Hadron Collider during pp collisions at root s = 13 TeV. The observable measures the different probability of top and antitop quarks to have the higher energy as a function of the jet scattering angle with respect to the beam axis. The energy asymmetry is measured in the semileptonic t (t) over bar decay channel, and the hadronically decaying top quark must have transverse momentum above 350 GeV. The results are corrected for detector effects to particle level in three bins of the scattering angle of the associated jet. The measurement agrees with the SM prediction at next-to-leading-order accuracy in quantum chromodynamics in all three bins. In the bin with the largest expected asymmetry, where the jet is emitted perpendicular to the beam, the energy asymmetry is measured to be -0.043 +/- 0.020, in agreement with the SM prediction of -0.037 +/- 0.003. Interpreting this result in the framework of the Standard Model effective field theory (SMEFT), it is shown that the energy asymmetry is sensitive to the top-quark chirality in four-quark operators and is therefore a valuable new observable in global SMEFT fits.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Asimakopoulou, Eleni M.Uppsala universitet,Högenergifysik(Swepub:uu)eleas553 (author)
  • Bergeås Kuutmann, Elin,1980-Uppsala universitet,Högenergifysik(Swepub:uu)elibe340 (author)
  • Brenner, RichardUppsala universitet,Högenergifysik(Swepub:uu)richbren (author)
  • Dimitriadi, C.Uppsala universitet,Institutionen för fysik och astronomi,Univ Bonn, Phys Inst, Bonn, Germany.(Swepub:uu)chrdi726 (author)
  • Ekelöf, TordUppsala universitet,Högenergifysik,FREIA(Swepub:uu)tordeke (author)
  • Ellajosyula, VenugopalUppsala universitet,Högenergifysik(Swepub:uu)venel845 (author)
  • Ellert, MattiasUppsala universitet,Högenergifysik(Swepub:uu)mel03009 (author)
  • Ferrari, Arnaud,1973-Uppsala universitet,Högenergifysik(Swepub:uu)arfer499 (author)
  • Gonzalez Suarez, RebecaUppsala universitet,Högenergifysik(Swepub:uu)rebgo209 (author)
  • Mathisen, ThomasUppsala universitet,Högenergifysik,Uppsala Univ, Dept Phys & Astron, Uppsala, Sweden(Swepub:uu)thoma814 (author)
  • Ördek, SerhatUppsala universitet,Högenergifysik(Swepub:uu)seror924 (author)
  • Sunneborn Gudnadottir, OlgaUppsala universitet,Högenergifysik(Swepub:uu)olggu198 (author)
  • Zwalinski, L.CERN, Geneva, Switzerland. (author)
  • Leopold, AlexanderKTH,Fysik(Swepub:kth)u1wx33ov (author)
  • Lundberg, OlofKTH,Partikel- och astropartikelfysik(Swepub:kth)u142u9nh (author)
  • Lund-Jensen, BengtKTH,Partikel- och astropartikelfysik(Swepub:kth)u13bp6vd (author)
  • Ohm, ChristianKTH,Partikel- och astropartikelfysik(Swepub:kth)u128x0hb (author)
  • Ripellino, GiuliaKTH,Partikel- och astropartikelfysik(Swepub:kth)u13f31yo (author)
  • Shaheen, RabiaKTH,Partikel- och astropartikelfysik(Swepub:kth)u1uqh9ek (author)
  • Shope, David R.KTH,Partikel- och astropartikelfysik(Swepub:kth)u17s7aqp (author)
  • Strandberg, JonasKTH,Partikel- och astropartikelfysik(Swepub:kth)u1midk9y (author)
  • Aix Marseille Univ, CPPM, CNRS IN2P3, Marseille, France.Högenergifysik (creator_code:org_t)

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  • In:European Physical Journal C: Springer Nature82:41434-60441434-6052

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