Mapping the material in the LHCb vertex locator using secondary hadronic interactions
© 2018 CERN. Published by IOP Publishing Ltd. 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 interactio...
Format: | Article |
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Language: | English |
Published: |
IOP Publishing
2021
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Online Access: | https://hdl.handle.net/1721.1/134066 |
Summary: | © 2018 CERN. Published by IOP Publishing Ltd. 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. |
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