Effects beyond the Standard Model on Radiation Amplitude Zero in inclusive W±Z production with Sherpa

Publikation: Hochschulschrift/AbschlussarbeitBachelorarbeit

Beitragende

  • Amelie Schmohl - , Technische Universität Dresden (Autor:in)

Abstract

The inclusive W±Z boson production refers to all processes that result in W±Z a boson final state, including events with additional jets or photons. Such processes are primarily studied in proton-proton (pp) collisions, as at the LHC (Large Hadron Collider), which provides a high centre-of-mass energy suitable for investigating the production of heavy bosons. One significant feature of this process is the Radiation Amplitude Zero (RAZ) effect, where the differential cross-section exhibits a dip (approaching zero) for specific observables. This phenomenon offers an opportunity to study Beyond Standard Model (BSM) physics, as deviations from the Standard Model could "fill" the dip, providing sensitivity to new physics effects. In particular, the SMEFT model was employed to mathematically describe an extension of the Standard Model. With a maximum likelihood fit, limits on Wilson coefficients are derived, which scale the tested dimension-six Operators that represent new physics couplings in the W±Z process. Afterwards, these limits are used to investigate, how BSM effects influence the polarization states of the W± and Z bosons. Additionally, linear and quadratic contribution orders and their polarisation components are compared for individual operators. The process is simulated using the Monte Carlo event generator Sherpa (version 3.0) and with a 0,1 jet merged setup for different observables in different phase spaces.

Details

OriginalspracheEnglisch
QualifizierungsstufeBachelor of Science
Gradverleihende Hochschule
Betreuer:in / Berater:in
  • Siegert, Frank, Betreuer:in
PublikationsstatusVeröffentlicht - 25 Feb. 2025
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