TORCH pattern recognition and particle identification performance

L. M. Garcia Martin, T. Blake, N. H. Brook, M. F. Cicala, D. Cussans, M. W.U. van Dijk, R. Forty, T. Gershon, T. Gys, T. Hadavizadeh, N. Harnew, T. Jones, M. Kreps, J. Rademacker, J. C. Smallwood, M. Tat

Research output: Contribution to journalArticlepeer-review


The TORCH detector aims to provide K/π (K/p) separation up to a momentum of about 10 (15) [Formula presented] by measuring their time-of-flight at the LHCb detector. Prompt Cherenkov photons are produced in a quartz radiator bar of 10 mm thickness, and propagated via total internal reflection to the periphery of the detector, where they are focused onto an array of microchannel plate photomultipliers that measure the photon arrival time and position. Pattern recognition techniques are used to compare the likelihood that the detector image is due to a given particle hypothesis. Good performance is obtained even for very high detector occupancies.

Original languageEnglish
Article number168437
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Early online date20 Jun 2023
Publication statusPublished - 31 Oct 2023

Bibliographical note

Funding Information:
The support is acknowledged of the Science and Technology Research Council, UK , grant number ST/P002692/1 , of the European Research Council through an FP7 Advanced Grant ( ERC-2011-AdG 299175-TORCH ) and of the Royal Society, UK .


  • Particle identification
  • Time-Of-Flight detectors

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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