2017/06/06 by Wang Yong, Zhang Ren-You, Ma Wen-Gan +6
Physics and Astronomy · #Boson #Fragmentation (computing) #Hadron #High-Energy Particle Collisions Research #Large Hadron Collider #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Quantum chromodynamics #hep-ph
paper · pdf · doi:10.1088/1361-6471/aa7787
published as J. Phys. G: Nucl. Part. Phys. 44 (2017) 085002 · 25 pages, 10 figures
openalex publication_date 2017/06/06 · arxiv created 2017/07/12 · arxiv updated 2017/08/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract In this paper we present the first study of the impact of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi mathvariant="italic"></mml:mi> <mml:mo stretchy="false">(</mml:mo> <mml:mi>α</mml:mi> <mml:mo stretchy="false">)</mml:mo> </mml:math> electroweak (EW) correction to the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi mathvariant="italic">pp</mml:mi> <mml:mo>→</mml:mo> <mml:mi mathvariant="italic">ZZ</mml:mi> <mml:mi>γ</mml:mi> <mml:mo>+</mml:mo> <mml:mi>X</mml:mi> </mml:math> process at the CERN Large Hadron Collider. The subsequent Z -boson leptonic decays are considered at the leading order using the MadSpin method, which takes into account the spin-correlation and off-shell effects from the Z -boson decays. We provide numerical results of the integrated cross section and the kinematic distributions for this process. In coping with final-state photon–jet separation in the QCD real emission and photon-induced processes, we adopt both the Frixione isolated-photon plus jets algorithm and the phenomenological quark-to-photon fragmentation function method for comparison. We find that the next-to-leading order (NLO) EW correction to the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi mathvariant="italic">ZZ</mml:mi> <mml:mi>γ</mml:mi> </mml:math> production can be sizeable and amounts to about <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mo>−</mml:mo> <mml:mn>7</mml:mn> <mml:mo>%</mml:mo> </mml:math> of the integrated cross section, and provides a non-negligible contribution to the kinematic distributions, particularly in the high energy region. We conclude that the NLO EW correction should be included in precision theoretical predictions in order to match future experimental accuracy.