Searches for QCD instantons with forward proton tagging

0570812 - FZÚ 2024 RIV DE eng J - Journal Article
Taševský, Marek - Khoze, V.A. - Milne, D. - Ryskin, M.G.
Searches for QCD instantons with forward proton tagging.
European Physical Journal C. Roč. 83, č. 1 (2023), č. článku 35. ISSN 1434-6044. E-ISSN 1434-6052
R&D Projects: GA MŠMT(CZ) LTT17018
Institutional support: RVO:68378271
Keywords : quantum chromodynamics * instanton * diffraction * large rapidity gap * forward proton tagging
OECD category: Particles and field physics
Impact factor: 4.4, year: 2022
Method of publishing: Open access

We study the possibility to observe heavy (M_inst>60 GeV) QCD instantons at the LHC in events with one or two tagged leading protons including fast simulation of detector and pile-up effects. We show that the expected instanton signal in a single-tagged configuration is strongly affected by central detector and pile-up effects. For double-tagged approach, where larger integrated luminosities and hence larger pile-up contaminations need to be considered, the combinatorial background overwhelms the expected signal. We suggest that additional time information about tracks at central and forward rapidities would be crucial for potential improvements.
Permanent Link: https://hdl.handle.net/11104/0342150