CERN Accelerating science

Article
Report number	arXiv:2201.00019
Title	FACET: A new long-lived particle detector in the very forward region of the CMS experiment
Author(s)	Cerci, S. (Adiyaman U. ; Istanbul Aydin U.) ; Sunar Cerci, D. (Adiyaman U. ; Istanbul Aydin U.) ; Lazic, D. (Boston U.) ; Landsberg, G. (Brown U.) ; Cerutti, F. (CERN) ; Sabate-Gilarte, M. (CERN) ; Albrow, M.G. (Fermilab) ; Berryhill, J. (Fermilab) ; Green, D.R. (Fermilab) ; Hirschauer, J. (Fermilab) ; Kulkarni, S. (Graz U.) ; Brucken, J.E. (Helsinki Inst. of Phys.) ; Emediato, L. (Iowa State U.) ; Mestvirishvili, A. (Iowa State U.) ; Nachtman, J. (Iowa State U.) ; Onel, Y. (Iowa State U.) ; Penzo, A. (Iowa State U.) ; Aydilek, O. (Istanbul Aydin U.) ; Hacisahinoglu, B. (Istanbul Aydin U.) ; Ozkorucuklu, S. (Istanbul Aydin U.) ; Sert, H. (Istanbul Aydin U.) ; Simsek, C. (Istanbul Aydin U.) ; Zorbilmez, C. (Istanbul Aydin U.) ; Hos, I. (Istanbul Aydin U.) ; Hadley, N. (Maryland U.) ; Skuja, A. (Maryland U.) ; Du, M. (Nanjing U.) ; Fang, R. (Nanjing U.) ; Liu, Z. (Nanjing U.) ; Isildak, B. (Ozyegin U. ; Istanbul Aydin U.) ; Tran, V.Q. (Tsung-Dao Lee Inst., Shanghai)
Publication	2022-06-20
Imprint	2021-12-31
Number of pages	15
Note	15 pages, 6 figures, in print in JHEP. The resubmission has corrected Figs. 2,5,6, as well as a few additions as a result of addressing the referee comments. It matches the final version, to appear in JHEP
In:	JHEP 2022 (2022) 110
DOI	10.1007/JHEP06(2022)110 (publication)
Subject category	hep-ph ; Particle Physics - Phenomenology ; hep-ex ; Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; CMS
Abstract	We describe a proposal to add a set of very forward detectors to the CMS experiment for the high-luminosity era of the Large Hadron Collider to search for beyond the standard model long-lived particles, such as dark photons, heavy neutral leptons, axion-like particles, and dark Higgs bosons. The proposed subsystem is called FACET for Forward-Aperture CMS ExTension, and will be sensitive to any particles that can penetrate at least 50 m of magnetized iron and decay in an 18 m long, 1 m diameter vacuum pipe. The decay products will be measured in detectors using identical technology to the planned CMS Phase-2 upgrade.
Copyright/License	publication: © 2022-2024 The Authors (License: CC BY 4.0), sponsored by SCOAP³ preprint: (License: CC BY 4.0)

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