literature

Boosted top quarks in the peak region with NL3L resummation

Dec 22, 2020
28 pages
Published in:
  • Phys.Rev.D 104 (2021) 1, 014026
  • Published: Jul 1, 2021
e-Print:
DOI:
Report number:
  • MIT-CTP 5237; UWThPh-2020-24; IFT-UAM/CSIC-20-134; MAN/HEP/2020/012

Citations per year

202120222023202431011
Abstract: (APS)
We present results for the 2-jettiness differential distribution for boosted top quark pairs produced in e+e- collisions in the peak region accounting for QCD large-logarithm resummation at next-to-next-to-next-to-leading logarithmic order and fixed-order corrections to matrix elements at next-to-next-to-leading order calculated in the framework of soft-collinear effective theory and boosted heavy quark effective theory. Electroweak and finite-width effects are included at leading order. We study the perturbative convergence of the cross section in the pole and MSR mass schemes, with and without soft gap subtractions. We find that there is a partial cancellation between the pole mass and soft function renormalons. When renormalon subtractions concerning the top mass and the soft function are implemented, the perturbative uncertainties are, however, systematically smaller and an improvement in the stability of the peak position is observed. We find that the top MSR mass may be determined with perturbative uncertainties well below 100 MeV from the peak position of the 2-jettiness distribution. This result has important applications for Monte Carlo top quark mass calibrations.
Note:
  • Added explanations for expected size of power corrections. Results unchanged
  • 12.38.Bx
  • 12.38.Cy
  • 12.39.St
  • 24.85.+p
  • top: mass
  • top: boosted particle
  • top: pair production
  • electron positron: colliding beams
  • mass: calibration
  • mass: pole