Operation and performance of the Probe for Luminosity Measurement at LHCb

@article{alessio2026operation,
  title = {{Operation and performance of the Probe for Luminosity Measurement at LHCb}},
  author = {F Alessio and S Barsuk and C Beigbeder and A Bellavista and O Bezshyyko and I Boiaryntseva and C Bourgeois and A Boyarintsev and M Briere and L Burmistrov and A Carbone and G Cavallero and V Chaumat and S Cholak and D Douillet and O Duarte and P Durante and F Ferrari and E Franzoso and C Gaspar and L Golinka-Bezshyyko and L.A Granado Cardoso and E Graverini and D Hohov and G Iaquaniello and V Kushnir and R Matev and P Mayencourt and V Mytrochenko and V Orlov and V Puill and D Reynet and P Robbe and P Rosier and L Shchutska and Y Song and E Spedicato and L Toscano and M van Dijk and A Villa and G Vouters and V Yeroshenko and V Zhovkovska},
  journal = {Journal of Instrumentation},
  year = {2026},
  month = sep,
  doi = {10.1088/1748-0221/21/09/p09003},
  eprint = {2609.10288},
  archivePrefix = {arXiv},
  url = {https://hal.science/hal-05737064v1},
  note = {CC BY 4.0},
}

TY  - JOUR
TI  - Operation and performance of the Probe for Luminosity Measurement at LHCb
AU  - F Alessio
AU  - S Barsuk
AU  - C Beigbeder
AU  - A Bellavista
AU  - O Bezshyyko
AU  - I Boiaryntseva
AU  - C Bourgeois
AU  - A Boyarintsev
AU  - M Briere
AU  - L Burmistrov
AU  - A Carbone
AU  - G Cavallero
AU  - V Chaumat
AU  - S Cholak
AU  - D Douillet
AU  - O Duarte
AU  - P Durante
AU  - F Ferrari
AU  - E Franzoso
AU  - C Gaspar
AU  - L Golinka-Bezshyyko
AU  - L.A Granado Cardoso
AU  - E Graverini
AU  - D Hohov
AU  - G Iaquaniello
AU  - V Kushnir
AU  - R Matev
AU  - P Mayencourt
AU  - V Mytrochenko
AU  - V Orlov
AU  - V Puill
AU  - D Reynet
AU  - P Robbe
AU  - P Rosier
AU  - L Shchutska
AU  - Y Song
AU  - E Spedicato
AU  - L Toscano
AU  - M van Dijk
AU  - A Villa
AU  - G Vouters
AU  - V Yeroshenko
AU  - V Zhovkovska
PY  - 2026
DA  - 2026/09/03
JO  - Journal of Instrumentation
DO  - 10.1088/1748-0221/21/09/p09003
UR  - https://hal.science/hal-05737064v1
AB  - The Probe for LUminosity MEasurement (PLUME) detector is a dedicated luminosity monitor at the LHCb interaction point. It is a hodoscope comprising 48 Hamamatsu R760 photomultiplier tubes that detect Cherenkov light produced by particles travelling in the direction opposite to the LHCb spectrometer acceptance. PLUME provides real-time, bunch-by-bunch luminosity measurements during LHCb data taking and serves as the primary detector for controlling the luminosity levelling process at LHCb. In addition, its data are used offline, together with other dedicated counters from LHCb sub-systems, to determine the integrated luminosity delivered to the experiment. This paper reports on the detector's operational performance during the 2024-2026 data-taking period of Run 3. The integrated luminosity recorded by the LHCb experiment in pp collisions at √s = 13.6 TeV during this period, as measured by the PLUME online luminosity counters for detector performance monitoring, amounts to ℒ = (26.71 ± 1.07) fb^−1. The luminosity values used in physics analyses are determined separately through dedicated offline calibrations based on van der Meer scans and Beam Gas Imaging techniques, and will be reported in a dedicated publication, as they are beyond the scope of this paper.
SN  - 1748-0221
ER  -