Hunting for QCD Instantons at the LHC in Events with Large Rapidity Gaps
arXiv:2104.01861 · doi:10.1103/PhysRevD.104.054013
Abstract
We outline a strategy of how to search for QCD instantons of invariant mass 20 -- 60 GeV in diffractive events in low luminosity runs at the LHC. We show that by imposing appropriate selection criteria on the final states, one can select the kinematic regime where the instanton signal exceeds the background by a factor of at least 8. In spite of the relatively strong cuts that we impose on the total transverse energy and the number of charged tracks, GeV, measured within the interval and excluding events with high particles, the expected cross-section is sufficiently large to study the instanton production in the events with Large Rapidity Gaps at low luminosities, thus avoiding problems with pile-up. The paper also includes an updated computation of instanton cross-sections and other parameters relevant for the ongoing studies.
arXiv comment26 pages, 5 figures. v2: updated cuts, improved signal to background ratio
References in corpus (38)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- An Introduction to PYTHIA 8.2
- LHAPDF6: parton density access in the LHC precision era
- Instantons in QCD
- General-purpose event generators for LHC physics
- Branching ratios and spectral functions of tau decays: final ALEPH measurements and physics implications
- How bright is the proton? A precise determination of the photon parton distribution function
- QCDNUM: Fast QCD Evolution and Convolution
- Measurement and QCD Analysis of the Diffractive Deep-Inelastic Scattering Cross Section at HERA
- Measurement of the Strong Coupling Constant and the Vector and Axial-Vector Spectral Functions in Hadronic Tau Decays
- The Photon Content of the Proton
- Illuminating the photon content of the proton within a global PDF analysis
- alpha_s and the tau hadronic width: fixed-order, contour-improved and higher-order perturbation theory
- Topological Structure of the SU(3) Vacuum
- Topological Structure in the SU(2) Vacuum
- Instantons in Deep-Inelastic Scattering - The Simplest Process -
- Measurement of diffraction dissociation cross sections in pp collisions at sqrt(s) = 7 TeV
- Instanton Content of the SU(3) Vacuum
- Perturbative expansion of the QCD Adler function improved by renormalization-group summation and analytic continuation in the Borel plane
- Determination of Alpha_s(1 GeV) from the charmonium fine structure
- Instanton-Induced Cross-Sections in Deep-Inelastic Scattering
- Instanton-induced contributions to structure functions of deep inelastic scattering
- Suppression of baryon number violation in electroweak collisions: Numerical results
- Dijet production in TeV collisions with large rapidity gaps at the ATLAS experiment
- Search for QCD Instanton-Induced Processes in Deep-Inelastic Scattering at HERA
- Study of the hard double-parton scattering contribution to inclusive four-lepton production in collisions at = 8 TeV with the ATLAS detector
- Multiple interactions and rapidity gap survival
- Search for QCD-instanton induced events in deep inelastic ep scattering at HERA
- A Study of Inclusive Double-Pomeron-Exchange in p pbar -> p X pbar at root s = 630 GeV
- Semiclassical Double-Pomeron Production of Glueballs and
- Measurement of differential cross sections for single diffractive dissociation in TeV collisions using the ATLAS ALFA spectrometer
- Large Effects from Small QCD Instantons: Making Soft Bombs at Hadron Colliders
- How to discover QCD Instantons at the LHC
- Suppression of Electroweak Instanton Processes in High-energy Collisions
- Measurement of single-diffractive dijet production in proton-proton collisions at 8 TeV with the CMS and TOTEM experiments
- Searching for QCD Instantons at Hadron Colliders
- Dynamics of diffractive dissociation
- Event shapes and jets in and pp collisions