4 research outputs found
LHCb potential to discover long-lived new physics particles with lifetimes above 100 ps
For years, it has been believed that the main LHC detectors can only
restrictively play the role of a lifetime frontier experiment exploring the
parameter space of long-lived particles (LLPs) - hypothetical particles with
tiny couplings to the Standard Model. This paper demonstrates that the LHCb
experiment may become a powerful lifetime frontier experiment if it uses the
new Downstream algorithm reconstructing tracks that do not let hits in the LHCb
vertex tracker. In particular, for many LLP scenarios, LHCb may be as sensitive
as the proposed experiments beyond main LHC detectors for various LLP models,
including heavy neutral leptons, dark scalars, dark photons, and axion-like
particles.Comment: Matches the version accepted for the publication in EPJ
LHCb potential to discover long-lived new physics particles with lifetimes above 100 ps
For years, it has been believed that the main LHC detectors can play only a limited role of a lifetime frontier experiment exploring the parameter space of long-lived particles (LLPs)—hypothetical particles with tiny couplings to the Standard Model. This paper demonstrates that the LHCb experiment may become a powerful lifetime frontier experiment if it uses the new Downstream algorithm reconstructing tracks that do not allow hits in the LHCb vertex tracker. In particular, for many LLP scenarios, LHCb may be as sensitive as the proposed experiments beyond the main LHC detectors for various LLP models, including heavy neutral leptons, dark scalars, dark photons, and axion-like particles
LHCb potential to discover long-lived new physics particles with lifetimes above 100 ps
For years, it has been believed that the main LHC detectors can only restrictively play the role of a lifetime frontier experiment exploring the parameter space of long-lived particles (LLPs) - hypothetical particles with tiny couplings to the Standard Model. This paper demonstrates that the LHCb experiment may become a powerful lifetime frontier experiment if it uses the new Downstream algorithm reconstructing tracks that do not let hits in the LHCb vertex tracker. In particular, for many LLP scenarios, LHCb may be as sensitive as the proposed experiments beyond main LHC detectors for various LLP models, including heavy neutral leptons, dark scalars, dark photons, and axion-like particles
Impact of the high-level trigger for detecting long-lived particles at LHCb
Long-lived particles (LLPs) are very challenging to search for with current detectors and computing requirements due to their very displaced vertices. This study evaluates the ability of the trigger algorithms used in the Large Hadron Collider beauty (LHCb) experiment to detect long-lived particles and attempts to adapt them to enhance the sensitivity of this experiment to undiscovered long-lived particles. One of the challenges in the track reconstruction is to deal with the large amount of combinatorics of hits. A dedicated algorithm has been developed to cope with the large data output. When fully implemented, this algorithm would greatly increase the efficiency for any long-lived particle reconstruction in the forward region, for the Standard Model of particle physics and beyond