Letter of Intent for FASER: ForwArd Search ExpeRiment at the LHC

Collaboration, FASER; Ariga, A.; Ariga, T.; Boyd, J.; Casper, D.; Feng, Jonathan L.; Galon, Iftah; Hsu, S.‐C.; Kling, Felix; Otono, H.; Petersen, B. A.; Sato, Osamu; Soffa, A. M.; Swaney, Jeffrey R.; Trojanowski, Sebastian

doi:10.48550/arxiv.1811.10243

Cited by 58 publications

(110 citation statements)

References 42 publications

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“…The FASER experiment has been originally proposed to search for light long-lived particles at the LHC [5,[19][20][21][22][23][24][25][26][27]. Placed at its front is a dedicated neutrino detector, called FASERν, which consists of emulsion films interleaved with tungsten plates of total mass 1.2 tons [8,9].…”

Section: Forward Neutrino Fluxes a Experimental Setupmentioning

confidence: 99%

Forward Neutrino Fluxes at the LHC

Kling,

Nevay

2021

Preprint

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With the upcoming Run 3 of the LHC, the FASERν and SND@LHC detectors will start a new era of neutrino physics using the far-forward high-energy neutrino beam produced in collisions at ATLAS. This emerging LHC neutrino physics program requires reliable estimates of the LHC's forward neutrino fluxes and their uncertainties. In this paper we provide a new fast-neutrino flux simulation, implemented as a RIVET module, to address this issue. We present the expected energy distributions going through the FASERν and SND@LHC detectors based on various commonly used event generators, analyze the origin of those neutrinos, and present the expected neutrino event rates.

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Section: Forward Neutrino Fluxes a Experimental Setupmentioning

confidence: 99%

Forward Neutrino Fluxes at the LHC

Kling,

Nevay

2021

Preprint

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“…Various versions of the FASER experiment have been proposed: FASER [145,146] and FASER2 [147]. The former collects data during LHC Run 3 and its detector have the cylindrical shape with 1.5 m depth and 10 m radius, while the latter takes data during HL-LHC with the cylindrical shape of 5 m depth and 1 m radius.…”

Section: Dark Nucleon Searches At the Lhcmentioning

confidence: 99%

“…Meanwhile, the background events at FASER have been well discussed in Ref. [145]. Following the literature, we assume E thr min 100 GeV for the total energy deposition in order to reduce the trigger rate and to remove low-energy backgrounds at FASER [145,147].…”

Section: Dark Nucleon Searches At the Lhcmentioning

confidence: 99%

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LHC Lifetime Frontier and Visible Decay Searches in Composite Asymmetric Dark Matter Models

Kamada,

Kuwahara

2021

Preprint

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The LHC lifetime frontier will probe dark sector in near future, and the visible decay searches at fixed-target experiments have been exploring dark sector. Composite asymmetric dark matter with dark photon portal is a promising framework explaining the coincidence problem between dark matter and visible matter. Dark strong dynamics provides rich structure in the dark sector: the lightest dark nucleon is the dark matter, while strong annihilation into dark pions depletes the symmetric components of the dark matter. Dark photons alleviate cosmological problems. Meanwhile, dark photons make dark hadrons long-lived in terrestrial experiments. Moreover, the dark hadrons are produced through the very same dark photon. In this study, we discuss the visible decay searches for composite asymmetric dark matter models. For a few GeV dark nucleons, the LHC lifetime frontier, MATHUSLA and FASER, has a potential to discover their decay when kinetic mixing angle of dark photon is 10 −4 . On the other hand, fixed-target experiments, in particular SeaQuest, will have a great sensitivity to dark pions with a mass below GeV and with kinetic mixing 10 −4 in addition to the LHC lifetime frontier. These projected sensitivities to dark hadrons in dark photon parameter space are comparable with the future sensitivities of dark photon searches, such as Belle-II and LHCb.

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“…A trigger signal for data taking is provided from the three types of scintillator stations and the calorimeter. Based on FLUKA [5,6] simulations and in situ measurements [7,8], a trigger rate of around 500 Hz is expected for a luminosity of 2 × 10 34 cm −2 s −1 2 . This rate is dominated by high-energy muons penetrating through the 90 m of rock to get to FASER.…”

Section: Introductionmentioning

confidence: 99%

The tracking detector of the FASER experiment

Abreu,

Antel,

Ariga

et al. 2021

Preprint

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FASER is a new experiment designed to search for new light weakly-interacting long-lived particles (LLPs) and study high-energy neutrino interactions in the very forward region of the LHC collisions at CERN. The experimental apparatus is situated 480 m downstream of the ATLAS interaction-point aligned with the beam collision axis. The FASER detector includes four identical tracker stations constructed from silicon microstrip detectors. Three of the tracker stations form a tracking spectrometer, and enable FASER to detect the decay products of LLPs decaying inside the apparatus, whereas the fourth station is used for the neutrino analysis. The spectrometer has been installed in the LHC complex since March 2021, while the fourth station is not yet installed. FASER will start physics data taking when the LHC resumes operation in early 2022. This paper describes the design, construction and testing of the tracking spectrometer, including the associated components such as the mechanics, readout electronics, power supplies and cooling system.

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Letter of Intent for FASER: ForwArd Search ExpeRiment at the LHC

Cited by 58 publications

References 42 publications

Forward Neutrino Fluxes at the LHC

Forward Neutrino Fluxes at the LHC

LHC Lifetime Frontier and Visible Decay Searches in Composite Asymmetric Dark Matter Models

The tracking detector of the FASER experiment

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