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Particle production and identification for the T10 secondary beamline of the CERN East Area / van Dijk, Maarten (CERN) ; Hayat, Ahsan (CERN) ; Banerjee, Dipanwita (CERN) ; Bernhard, Johannes (CERN) ; Gokturk, Berare (CERN ; Bogazici U.) ; Nevay, Laurie (CERN) ; Petersen, Jorgen (CERN) ; Schwinzerl, Martin (CERN)
The particle composition of the T10 beam line in the renovated East Hall at CERN has been measured using several experimental techniques and detectors: pressure scans on a threshold Cherenkov counter, a lead-glass calorimeter, time-of-flight, and finally using two separate threshold Cherenkov counters. [...]
arXiv:2507.02567. - 18.
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NA60+/DiCE: study of rare probes of the Quark-Gluon Plasma at SPS energies / NA60+/DiCE Collaboration
We propose a new fixed-target experiment, NA60+/DiCE (Dilepton and Charm Experiment), for the study of electromagnetic and hard probes of the Quark-Gluon Plasma (QGP) in heavy-ion collisions at the CERN SPS. [...]
CERN-SPSC-2025-023 ; SPSC-P-373. - 2025 - mult..
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European Strategy for Particle Physics 2026: the NA60+/DiCE experiment at the SPS / NA60+/DiCE Collaboration
The exploration of the phase diagram of Quantum ChromoDynamics (QCD) is carried out by studying ultrarelativistic heavy-ion collisions. [...]
arXiv:2503.23872. - 15.
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Estimates of Particles on Target for Future Ion Experiments in the SPS North Area / Prebibaj, Tirsi (CERN) ; Ahdida, Claudia (CERN) ; Alemany Fernandez, Reyes (CERN) ; Arduini, Gianluigi (CERN) ; Arrutia, Pablo (CERN) ; Bartosik, Hannes (CERN) ; Charitonidis, Nikolaos (CERN) ; Van Dijk, Maarten (CERN)
The CERN Super Proton Synchrotron (SPS) delivers ion beams to the North Area typically over a period of four weeks per year. Currently, NA61/SHINE is the only fixed target ion experiment in Experimental Hall North Area 1 (EHN1), continuing until Long Shutdown 3 (LS3). [...]
CERN-PBC-Notes-2025-009.- Geneva : CERN, 2025 - 16. Fulltext: PDF;

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Report from the Conventional Beams Working Group to the Physics Beyond Collider Study and to the European Strategy for Particle Physics / Gatignon, Lau (CERN) ; Banerjee, Dipanwita (Univ. Illinois at Urbana Champaign (US)) ; Bernhard, Johannes (CERN) ; Brugger, Markus (CERN) ; Charitonidis, Nikolaos (CERN) ; D'Alessandro, Gian Luigi (University of London (GB)) ; Doble, Niels (INFN Sezione di Pisa, Universita' e Scuola Normale Superiore, Pisa (IT)) ; Van Dijk, Maarten (CERN) ; Gerbershagen, Alexander (CERN) ; Montbarbon, Eva (CERN) et al. /Conventional Beams Working Group
This document summarises the main conclusions of the Conventional Beams Working group, which has analysed the beam related and technical requirements and requests in the proposals to the Physics Beyond Colliders study for the North Area at the CERN SPS. We present results from studies on feasibility, requirements, compatibility between proposals and, where possible, the order of magnitude of the costs. [...]
CERN-PBC-REPORT-2018-002.- Geneva : CERN, 2018 Fulltext: PDF;

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Summary Report of the Physics Beyond Colliders Study at CERN / PBC Collaboration
The Physics Beyond Collider Study Group was initially mandated by the CERN Management to prepare the previous European Particle Physics Strategy Update for CERN projects other than the high-energy frontier colliders. The main findings were summarized in~\cite{PBC_summary_2020}. [...]
CERN-PBC-REPORT-2025-003; arXiv:2505.00947.- Geneva : CERN, 2025 - 121 p. Final report: PDF; Fulltext: PDF;

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Ion beams requirements for the North Area Experiments post-LS3 / Ahdida, Claudia (CERN) ; Alemany Fernandez, Reyes (CERN) ; Arduini, Gianluigi (CERN) ; Arrutia, Pablo (CERN) ; Balazs, Kincso (CERN) ; Bartosik, Hannes (CERN) ; Bernhard, Johannes (CERN) ; Boer, Daniel (CERN) ; Bruce, Roderik (CERN) ; Brugger, Markus (CERN) et al.
The Super Proton Synchrotron (SPS) delivers ion beams to Experimental Hall North 1 (EHN1) on the CERN Prévessin site typically over a period of four weeks per year. EHN1 is currently hosting one physics experiment using ion beams, the NA61/SHINE experiment approved until Long Shutdown 3 (LS3) [...]
CERN-PBC-REPORT-2025-002.- Geneva : CERN, 2025 - 57. Report: PDF;

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Report from the Conventional Beams working group to the physics beyond colliders study and to the 2026 European Strategy for Particle Physics Update / Banerjee, Dipanwita (CERN) ; Schuh-Erhard, Silvia (ed.) (CERN) ; Bernhard, Johannes (ed.) (CERN) ; Doble, Niels (CERN) ; Nevay, Laurence James (CERN) ; Stummer, Florian Wolfgang (CERN) ; Jebramcik, Marc Andre (CERN) ; Mussolini, Carlo Alberto (University of Oxford (GB)) ; Gatignon, Lau (ed.) (Lancaster University (GB)) ; Metzger, Fabian (CERN) et al. /Physics Beyond Colliders Conventional Beams working group
This document reports the work and results of the Conventional Beams Working Group, which focuses on studies of the beam-related and technical requirements and requests from proposals submitted to the Physics Beyond Colliders Study (PBC) for the North Area at the CERN SPS and the East Area at theCERN PS accelerators. Previous CBWG reports have been published in 2018 and 2022, providing inputs to the European Strategy for Particle Physics (ESPP) discussions that took place in those years.This new document provides updated and supplementary material relevant for the 2025–2026 ESPP Update, including detailed results regarding the HIKE, SHADOWS, DICE/NA60+, ENUBET, NuTag,and SBN projects. [...]
CERN-PBC-REPORT-2025-001; CERN-2025-004.- Geneva : CERN, 2025 - 172 p. CERN Yellow Reports: Monographs, 4/2025 Draft PBC Conventional Beams Report: PDF; Fulltext: PDF;

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Proton beam delivery study for the NA60+ experiment in the H8 beamline at the CERN SPS North Area / Dyks, Luke Aidan (University of Oxford (GB)) ; Parozzi, Elisabetta Giulia (Universita & INFN, Milano-Bicocca (IT)) ; Van Dijk, Maarten (CERN)
CERN-PBC-Notes-2025-001.- Geneva : CERN, 2025 Fulltext: PDF;

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10.

Luminosity measurement at LHCb

Reference: Poster-2024-1221
Created: 2021. -1 p
Creator(s): Van Dijk, Maarten

The LHCb detector, designed to measure the decays of heavy hadrons, is a forward-arm spectrometer. Its efficiency can be degraded by collisions with high occupancy: therefore, a technique known as "luminosity levelling" has been used since the start of the LHC Run 1, allowing to control and stabilize the instantaneous luminosity with a precision of 5%. During LHC Runs 1 and 2, this technique employed data from the hardware-based trigger level to determine the instantaneous luminosity. These counters are calibrated in dedicated data taking runs a few times per year. The combination of van der Meer scans and of beam profiles obtained in beam-gas interactions, unique to LHCb, allowed LHCb to obtain in Run 1 the most precise luminosity measurement ever achieved at a bunched hadron collider. During LHC Run 3, the upgraded LHCb detector will see a 5x increase of luminosity. Dedicated luminosity detectors have been designed and are being commissioned for use in Run 3 and Run 4. This talk will review the methods used in Run 1 and introduce the new approach being developed for the coming LHC runs.

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