Mapping the material in the LHCb vertex locator using secondary hadronic interactions

Abstract

Precise knowledge of the location of the material in the LHCb vertex locator (VELO) is essential to reducing background in searches for long-lived exotic particles, and in identifying jets that originate from beauty and charm quarks. Secondary interactions of hadrons produced in beam-gas collisions are used to map the location of material in the VELO. Using this material map, along with properties of a reconstructed secondary vertex and its constituent tracks, a $p$-value can be assigned to the hypothesis that the secondary vertex originates from a material interaction. A validation of this procedure is presented using photon conversions to dimuons.

arXiv commentAll figures and tables are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-DP-2018-002.html

References in corpus (9)

• LHCb Detector Performance
• Performance of $b$-Jet Identification in the ATLAS Experiment
• Performance of the LHCb Vertex Locator
• Search for dark photons produced in 13 TeV $pp$ collisions
• Precision luminosity measurements at LHCb
• Inclusive Dark Photon Search at LHCb
• Search for massive, long-lived particles using multitrack displaced vertices or displaced lepton pairs in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Dark photons from charm mesons at LHCb
• Identification of beauty and charm quark jets at LHCb

Cited by in corpus (13)

• Search for $A^{\prime }\to {\mu }^{+}{\mu }^{-}$ decays
• Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider
• Searches for dark photons at accelerators
• Unleashing the full power of LHCb to probe Stealth New Physics
• Discovering True Muonium at LHCb
• Study of $Z$ bosons produced in association with charm in the forward region
• Constraints on the $K_{\mathrm{S}}^0\to {\mu }^{+}{\mu }^{-}$ branching fraction
• High-density gas target at the LHCb experiment
• LHCb potential to discover long-lived new physics particles with lifetimes above 100 ps
• Search for $CP$ violation in $D_{(s)}^{+}\to h^{+}{\pi }^0$ and $D_{(s)}^{+}\to h^{+}\eta$ decays
• Identification of charm jets at LHCb
• Long-lived Light Mediators in a Higgs Portal Model at the FCC-ee
• Search for $K_{\mathrm{S}(\mathrm{L})}^0\to {\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$ decays at LHCb