The upgrade of the CMS RPC system during the first LHC long shutdown

Tytgat, M.; Marinov, A.; Verwilligen, P.; Zaganidis, N.; Aleksandrov, A.; Genchev, V.; Iaydjiev, P.; Rodozov, M.; Shopova, M.; Sultanov, G.; Assran, Y.; Abbrescia, M.; Calabria, C.; Colaleo, A.; Iaselli, G.; Loddo, F.; Maggi, M.; Pugliese, G.; Benussi, L.; Bianco, S.; Caponero, M.; Colafranceschi, S.; Felli, F.; Piccolo, D.; Saviano, G.; Carrillo, Camilo; Berzano, U.; Gabusi, M.; Vitulo, P.; Kang, Min Ho; Lee, K. S.; Park, S. K.; Shin, S.; Sharma, A.

doi:10.1088/1748-0221/8/02/t02002

Cited by 13 publications

(11 citation statements)

References 5 publications

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“…RPC-triggered particles must have a minimum of four RPC hits (three if not geometrically possible) within the trigger time window [24,25]. A similar requirement also holds for particles triggered by the cathode strip chambers (CSCs) positioned at η ≥ 1.6, as the CSC trigger relies on three different track segments to reconstruct p T [26].…”

Section: Methodsmentioning

confidence: 99%

Bounds and prospects for stable multiply charged particles at the LHC

Jäger

Kvedaraitė

Pérez

et al. 2019

J. High Energ. Phys.

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Colored and colorless particles that are stable on collider scales and carry exotic electric charges, so-called multiply-charged heavy stable particles (MCHSPs), exist in extensions of the Standard Model, and can include the top partner(s) in solutions of the hierarchy problem. To obtain bounds on color-triplets and color-singlets of charges up to |Q| = 8, we recast searches for signatures of two production channels: the "open" channel -where the particles are pair-produced above threshold, and are detectable in dedicated LHC searches for stable multiply charged leptons, and the "closed" channel -where a particle-antiparticle pair is produced as a bound state, detectable in searches for a diphoton resonance. We recast the open lepton searches by incorporating the relevant strong-interaction effects for color-triplets. In both open and closed production, we provide a careful assessment of photon-induced processes using the accurate LUXqed PDF, resulting in substantially weaker bounds than previously claimed in the literature for the colorless case. Our bounds for colored MCHSPs are shown for the first time, as the LHC experiments have not searched for them directly. Generally, we obtain nearly charge-independent lower mass limits of around 970 GeV (color-triplet scalar), 1200 GeV (color-triplet fermion), and 880 − 900 GeV (color-singlet fermion) from open production, and strongly chargedependent limits from closed production. In all cases there is a cross-over between dominance by open and closed searches at some charge. We provide prospective bounds for √ s = 13 TeV LHC searches at integrated luminosities of 39.5 fb −1 , 100 fb −1 , and 300 fb −1 . Moreover, we show that a joint observation in the open and the closed channels allows to determine the mass, spin, color, and electric charge of the particle.

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Section: Methodsmentioning

confidence: 99%

Bounds and prospects for stable multiply charged particles at the LHC

Jäger

Kvedaraitė

Pérez

et al. 2019

J. High Energ. Phys.

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“…So, the first natural step to assure the additional redundancy is starting to complete the system, at least up to |η|=1.6, with the fourth RPC station. This upgrade consists of 144 RPC chambers, to be mounted in two concentric rings (RE4/2 and RE4/3) per station, with 36 chambers per ring [6]. The relative effort of chamber construction has already started and is really world-wide collaborative; bakelite is produced in Italy, gaps are assembled in Korea, chambers mechanics is provided by China, detector electronics is procured in Pakistan, and the final detector assembly is being done in India, Belgium and CERN.…”

Section: The Present Muon System and The Motivations For Its Upgradementioning

confidence: 99%

Upgrade of the CMS Muon System

Abbrescia¹

2014

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP 2013)

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The CMS muon system is based on three types of gaseous detectors, RPCs, CSCs and DTs. While operating very well in the present conditions, upgrades are foreseen for each of the subsystems, necessary to cope with the increased pile-up, coming along with higher rates and radiation. Electronics can be modernized by profiting from recent developments. In addition, detector R&D is ongoing, to possibly install other types of detectors, allowing to improve the trigger and tracking capabilities in the forward region. The upgrade programs and the relative R&D are outlined in this paper

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“…CSCs were only installed in the very forward region (1.8 < |η| < 2.4), and RPCs were missing completely and covered only the first three endcap disks (|η| < 1.6) [3].…”

Section: A Cms Muon Systemmentioning

confidence: 99%

Role of the RPC detector in the CMS muon system for tracking and trigger

Kim

2013

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC)

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The Resistive Plate Chambers are used in CMS as dedicated muon trigger detector both in the barrel and in the two endcap regions. They also contribute to muon reconstruction and identification with Drift Tube in the barrel and Cathode Strip Chambers in the endcaps. About 3000 square meter of double gap RPCs have been produced and installed in the experiment since 2007. The performance study and operational experience after three years of successful data taking at LHC is presented. Preliminary estimate of efficiency improvement of muon identification by the upgrade for the next two years is also shown. Presented at IEEE-NSS-MIC-RTDS-2013 2013 IEEE Nuclear Science Symposium and Medical Imaging ConferenceRole of the RPC Detector in the CMS Muon System for Tracking and Trigger Min Suk Kim On behalf of the CMS CollaborationAbstract-The Resistive Plate Chambers are used in CMS as dedicated muon trigger detector both in the barrel and in the two endcap regions. They also contribute to muon reconstruction and identification with Drift Tube in the barrel and Cathode Strip Chambers in the endcaps. About 3000 square meter of double gap RPCs have been produced and installed in the experiment since 2007. The performance study and operational experience after three years of successful data taking at LHC is presented. Preliminary estimate of efficiency improvement of muon identification by the upgrade for the next two years is also shown.

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The upgrade of the CMS RPC system during the first LHC long shutdown

Cited by 13 publications

References 5 publications

Bounds and prospects for stable multiply charged particles at the LHC

Bounds and prospects for stable multiply charged particles at the LHC

Upgrade of the CMS Muon System

Role of the RPC detector in the CMS muon system for tracking and trigger

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