Performance of the RPCs for the ARGO detector operated at the YangBaJing laboratory (4300m a.s.l.)

Bacci, C.; Bao, K.Z.; Barone, F.; Bartoli, B.; Bernardini, P.; Bussino, S.; Calloni, E.; Cao, Biyin; Cardarelli, R.; Catalanotti, S.; Cavaliere, Sergio; Cesaroni, F.; Danzengluobu,; Piazzoli, B. D’Ettorre; Vincenzi, M. De; Girolamo, T. Di; Sciascio, G. Di; Feng, Z. Y.; Fu, Yibing; Gao, X. Y.; Geng, Q. X.; Guo, H. W.; He, H. H.; He, M.; Huang, Q.; Iacovacci, M.; Iucci, N.; Jai, H.Y.; Jing, C. L.; Kong, Fanhong; Kuang, H.H.; Labaciren,; Li, B.; Li, J.Y.; Liu, Z.Q.; Lü, H.; Ma, Xiaohua; Mancarella, G.; Mari, Stefano Maria; Marsella, G.; Martello, D.; Meng, X. R.; Milano, L.; Mu, J.; Panareo, M.; Peng, Z. R.; Pistilli, P.; Saggese, L.; Santonico, R.; Shen, P. R.; Sun, Liang; Sun, S.C.; Surdo, A.; Tan, Y. H.; Vernetto, S.; Wang, C.R.; Wang, H.; Wang, H.Y.; Wei, Yn; Yang, H. T.; Yao, Qk; Yu, G. C.; Yue, Xiao-Ting; Yuan, A. F.; Zha, M.; Zhang, H.M.; Zhang, J.L.; Zhang, N.J.; Zhang, X.Y.; Zhaxisangzhu,; Zhaxiciren,; Zhu, Q. Q.

doi:10.1016/s0168-9002(03)01288-9

Cited by 12 publications

(4 citation statements)

References 2 publications

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“…For example, ATLAS has achieved a timing resolution of 1 ns and a spatial resolution of 1 cm, while CMS has achieved a timing resolution of 1 ns [34] and a spatial resolution of 0.81 cm [35]. RPCs operating in streamer mode at the YangBaJing laboratory for cosmic ray studies have demonstrated the required rate capability [36]. Higher rates can be achieved by operating in avalanche mode.…”

Section: Basic Principles and Simplified Detector Designmentioning

confidence: 99%

Long-lived particles at the energy frontier: the MATHUSLA physics case

et al. 2019

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We examine the theoretical motivations for long-lived particle (LLP) signals at the LHC in a comprehensive survey of standard model (SM) extensions. LLPs are a common prediction of a wide range of theories that address unsolved fundamental mysteries such as naturalness, dark matter, baryogenesis and neutrino masses, and represent a natural and generic possibility for physics beyond the SM (BSM). In most cases the LLP lifetime can be treated as a free parameter from the µm scale up to the Big Bang Nucleosynthesis limit of ∼10 7 m. Neutral LLPs with lifetimes above ∼ 100 m are particularly difficult to probe, as the sensitivity of the LHC main detectors is limited by challenging backgrounds, triggers, and small acceptances. MATHUSLA is a proposal for a minimally instrumented, large-volume surface detector near ATLAS or CMS. It would search for neutral LLPs produced in HL-LHC collisions by reconstructing displaced vertices (DVs) in a low-background environment, extending the sensitivity of the main detectors by orders of magnitude in the long-lifetime regime. We study the LLP physics opportunities afforded by a MATHUSLA-like detector at the HL-LHC, assuming backgrounds can be rejected as expected. We develop a model-independent approach to describe the sensitivity of MATHUSLA to BSM LLP signals, and compare it to DV and missing energy searches at ATLAS or CMS. We then explore the BSM motivations for LLPs in considerable detail, presenting a large number of new sensitivity studies. While our discussion is especially oriented towards the long-lifetime regime at MATHUSLA, this survey underlines the importance of a varied LLP search program at the LHC in general. By synthesizing these results into a general discussion of the top-down and bottom-up motivations for LLP searches, it is our aim to demonstrate the exceptional strength and breadth of the physics case for the construction of the MATHUSLA detector.

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Section: Basic Principles and Simplified Detector Designmentioning

confidence: 99%

Long-lived particles at the energy frontier: the MATHUSLA physics case

et al. 2019

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“…5.3.1, the DM relic abundance is obtained via slow χ 1 production in the early Universe (during radiation domination, as discussed in Sec. 5.3.1.1) through the decays of the χ 2 and ψ + states, which are in equilibrium with the thermal bath, and the subsequent DM freeze-in when the abundance of χ 2 and ψ + becomes exponentially suppressed, around 36 T ∼ m 2 /3. Assuming that the reheating temperature T R m 2 , the DM relic abundance can be estimated as:…”

Section: A Simplified Model: Freeze-in Through the Sm Higgsmentioning

confidence: 99%

Long-Lived Particles at the Energy Frontier: The MATHUSLA Physics Case

Curtin,

Drewes,

McCullough

et al. 2018

Preprint

167

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We examine the theoretical motivations for long-lived particle (LLP) signals at the LHC in a comprehensive survey of Standard Model (SM) extensions. LLPs are a common prediction of a wide range of theories that address unsolved fundamental mysteries such as naturalness, dark matter, baryogenesis and neutrino masses, and represent a natural and generic possibility for physics beyond the SM (BSM). In most cases the LLP lifetime can be treated as a free parameter from the µm scale up to the Big Bang Nucleosynthesis limit of ∼ 10 7 m. Neutral LLPs with lifetimes above ∼ 100m are particularly difficult to probe, as the sensitivity of the LHC main detectors is limited by challenging backgrounds, triggers, and small acceptances. MATHUSLA is a proposal for a minimally instrumented, large-volume surface detector near ATLAS or CMS. It would search for neutral LLPs produced in HL-LHC collisions by reconstructing displaced vertices (DVs) in a low-background environment, extending the sensitivity of the main detectors by orders of magnitude in the long-lifetime regime. In this white paper we study the LLP physics opportunities afforded by a MATHUSLA-like detector at the HL-LHC. We develop a model-independent approach to describe the sensitivity of MATHUSLA to BSM LLP signals, and compare it to DV and missing energy searches at AT-LAS or CMS. We then explore the BSM motivations for LLPs in considerable detail, presenting a large number of new sensitivity studies. While our discussion is especially oriented towards the long-lifetime regime at MATHUSLA, this survey underlines the importance of a varied LLP search program at the LHC in general. By synthesizing these results into a general discussion of the top-down and bottom-up motivations for LLP searches, it is our aim to demonstrate the exceptional strength and breadth of the physics case for the construction of the MATHUSLA detector.

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“…Resistive plate chambers (RPCs) [1][2][3] are being widely used in many high-energy physics experiments as well as cosmic ray experiments. The RPC is a gaseous parallel-plate detector that combines the spatial resolution of the wire chambers with the time resolution typical of a scintillation counter.…”

Section: Introductionmentioning

confidence: 99%

Simulation of the neutron response of a glass-resistive plate chamber in the energy range 10⁻¹⁰ MeV<E_n<10 GeV

2007

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The neutron sensitivity of a glass-resistive plate chamber (RPC) has been simulated using GEANT4 MC codes for the neutrons in the energy range 10 −10 MeV-10 GeV. The glass-RPC has many advantageous features such as high rate capability, it is easy to handle and can be built on an industrial scale. For an evaluation of their efficiency, a simulation test of the glass-RPC detectors has been performed in order to investigate their performance for neutrons detection. When compared to previous works on bakelite-RPC the results are comparatively higher. As the density of the glass electrode is higher than the bakelite electrode, relatively higher sensitivity results at higher neutron energies were obtained using these types of RPCs. For an isotropic neutron source using a GEANT4 Standard MC package, sensitivity, s n < 3.894 × 10 −2 at <10 GeV by double-gap glass-RPC has been observed. For the same neutron source with a GEANT4 Low MC package, double-gap glass-RPC sensitivity, s n < 4.042 × 10 −2 at <10 GeV has been measured. Similar but lower simulation results of the RPC detector have been observed for parallel neutron source configurations. The obtained simulated results were applied to the large hadron collider (LHC)/(CMS) compact muon solenoid radiation environment both in the endcap and barrel regions. The average sensitivities, expected hit rates in those regions were estimated. Additionally, a comparison between the present glass-RPCs with the previous bakelite-RPCs neutrons simulation results has been performed.

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Performance of the RPCs for the ARGO detector operated at the YangBaJing laboratory (4300m a.s.l.)

Cited by 12 publications

References 2 publications

Long-lived particles at the energy frontier: the MATHUSLA physics case

Long-lived particles at the energy frontier: the MATHUSLA physics case

Long-Lived Particles at the Energy Frontier: The MATHUSLA Physics Case

Simulation of the neutron response of a glass-resistive plate chamber in the energy range 10⁻¹⁰ MeV<E_n<10 GeV

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Performance of the RPCs for the ARGO detector operated at the YangBaJing laboratory (4300m a.s.l.)

Cited by 12 publications

References 2 publications

Long-lived particles at the energy frontier: the MATHUSLA physics case

Long-lived particles at the energy frontier: the MATHUSLA physics case

Long-Lived Particles at the Energy Frontier: The MATHUSLA Physics Case

Simulation of the neutron response of a glass-resistive plate chamber in the energy range 10−10 MeV<En<10 GeV

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Simulation of the neutron response of a glass-resistive plate chamber in the energy range 10⁻¹⁰ MeV<E_n<10 GeV