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.
26 pages, 5 figures. v2: updated cuts, improved signal to background ratio
References in corpus (13)
- An Introduction to PYTHIA 8.2
- LHAPDF6: parton density access in the LHC precision era
- How bright is the proton? A precise determination of the photon parton distribution function
- QCDNUM: Fast QCD Evolution and Convolution
- The Photon Content of the Proton
- alpha_s and the tau hadronic width: fixed-order, contour-improved and higher-order perturbation theory
- Measurement of diffraction dissociation cross sections in pp collisions at sqrt(s) = 7 TeV
- Perturbative expansion of the QCD Adler function improved by renormalization-group summation and analytic continuation in the Borel plane
- How to discover QCD Instantons at the LHC
- Suppression of Electroweak Instanton Processes in High-energy Collisions
- Searching for QCD Instantons at Hadron Colliders
- Dynamics of diffractive dissociation
- Event shapes and jets in and pp collisions