Searches for QCD instantons with forward proton tagging

Abstract

We study the possibility to observe heavy ($M_{\mathrm{inst}}>60$ 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.

arXiv comment23 pages, 4 figures, 1 table. Improved treatment of combinatorial background and an additional cut

References in corpus (22)

• An Introduction to PYTHIA 8.2
• Instantons in QCD
• Unintegrated parton distributions
• Measurement and QCD Analysis of the Diffractive Deep-Inelastic Scattering Cross Section at HERA
• Charged-particle distributions at low transverse momentum in $\sqrt{s}$=13 TeV pp interactions measured with the ATLAS detector at the LHC
• Measurement of the charged-particle multiplicity inside jets from $\sqrt{s}=8$ TeV $pp$ collisions with the ATLAS detector
• LHC Searches for Dark Matter in Compressed Mass Scenarios: Challenges in the Forward Proton Mode
• Dijet production in $\sqrt{s}=7$ TeV $pp$ collisions with large rapidity gaps at the ATLAS experiment
• The ALFA Roman Pot Detectors of ATLAS
• Multiple interactions and rapidity gap survival
• Measurements of the pseudorapidity dependence of the total transverse energy in proton-proton collisions at sqrt(s) = 7 TeV with ATLAS
• Review of Central Exclusive Production of the Higgs Boson Beyond the Standard Model
• Hard Diffraction with Dynamic Gap Survival
• Performance studies of Time-of-Flight detectors at LHC
• Semiclassical Double-Pomeron Production of Glueballs and ${\eta }^{\prime }$
• Large Effects from Small QCD Instantons: Making Soft Bombs at Hadron Colliders
• How to discover QCD Instantons at the LHC
• Measurement of single-diffractive dijet production in proton-proton collisions at $\sqrt{s}=$ 8 TeV with the CMS and TOTEM experiments
• Searching for QCD Instantons at Hadron Colliders
• Hunting for QCD Instantons at the LHC in Events with Large Rapidity Gaps
• Event shapes and jets in $e^{+}{e}^{-}$ and pp collisions
• Central Instanton Production

Cited by in corpus (3)

• Probing QCD instantons using jet correlation observables in proton-proton collisions at the LHC
• Measurement of event shapes in minimum-bias events from proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Instanton induced spin-spin correlations