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Axion-like particles (ALPs) are well-motivated extensions of the standard model (SM) that appear in numerous new physics scenarios. In this paper, we concentrate on searches for long-lived ALPs predicted by the photophobic scenario at the…

High Energy Physics - Phenomenology · Physics 2026-01-09 Chong-Xing Yue , Xin-Yang Li , Shuo Yang , Mei-Shu-Yu Wang

A search for long-lived particles is performed using a data sample of 4.7 fb-1 from proton-proton collisions at a centre-of-mass energy sqrt(s) = 7 TeV collected by the ATLAS detector at the LHC. No excess is observed above the estimated…

High Energy Physics - Experiment · Physics 2013-06-24 ATLAS Collaboration

We propose a beam-dump experiment (BDE) at the upcoming facility of China initiative Accelerator Driven System (CiADS), called CiADS-BDE, in order to search for long-lived particles (LLPs) predicted in various beyond-the-Standard-Model…

High Energy Physics - Phenomenology · Physics 2026-05-26 Liangwen Chen , Mingxuan Du , Zhiyu Sun , Zeren Simon Wang , Fang Xie , Ju-Jun Xie , Lei Yang , Pei Yu , Yu Zhang

Long-lived particles (LLPs) are a common feature in many beyond the Standard Model theories, including supersymmetry, and are generically produced in exotic Higgs decays. Unfortunately, no existing or proposed search strategy will be able…

High Energy Physics - Phenomenology · Physics 2017-02-01 John Paul Chou , David Curtin , H. J. Lubatti

Present and upcoming neutrino experiments can have considerable sensitivity to dark sectors that interact feebly with the Standard Model. We consider dark sectors interacting with the SM through irrelevant portals that are motivated on…

High Energy Physics - Phenomenology · Physics 2022-11-28 Marco Costa , Rashmish K. Mishra , Sonali Verma

Heavy neutral leptons (HNLs) with masses around the electroweak scale are expected to be rather long-lived particles, as a result of the observed smallness of the active neutrino masses. In this work, we study long-lived HNLs in $N_R$SMEFT,…

High Energy Physics - Phenomenology · Physics 2022-01-17 Giovanna Cottin , Juan Carlos Helo , Martin Hirsch , Arsenii Titov , Zeren Simon Wang

We report the first results of a search for leptophobic dark matter (DM) from the Coherent CAPTAIN-Mills (CCM) liquid argon (LAr) detector. An engineering run with 120 photomultiplier tubes (PMTs) and $17.9 \times 10^{20}$ protons-on-target…

Soon after the LHC is commissioned with proton beams the ATLAS experiment will begin studies of Pb-Pb collisions with a center of mass energy of ?sNN = 5.5 TeV. The ATLAS program is a natural extension of measurements at RHIC in a direction…

Nuclear Experiment · Physics 2014-11-18 Sebastian N. White

This paper presents a search for dark matter in the context of a two-Higgs-doublet model together with an additional pseudoscalar mediator, $a$, which decays into the dark-matter particles. Processes where the pseudoscalar mediator is…

High Energy Physics - Experiment · Physics 2021-12-03 ATLAS Collaboration

Heavy neutral leptons (HNLs) and axion-like particles (ALPs) are both considered well-motivated candidates for beyond the standard model (BSM) physics. If ALPs with sizable couplings to gluons exist, they will be abundantly produced at the…

High Energy Physics - Phenomenology · Physics 2026-04-21 Rebeca Beltrán , Chandan Hati , Martin Hirsch , Ana Martín-Galán

The goal of FASER, ForwArd Search ExpeRiment at the LHC, is to discover light, weakly-interacting particles with a small and inexpensive detector placed in the far-forward region of ATLAS or CMS. A promising location in an unused service…

High Energy Physics - Phenomenology · Physics 2021-11-18 Jonathan L. Feng , Iftah Galon , Felix Kling , Sebastian Trojanowski

Run 1 at the LHC was very successful with the discovery of a new boson. The boson's properties are found to be compatible with those of the Standard Model Higgs boson. It is now revealing the mechanism of electroweak symmetry breaking and…

High Energy Physics - Experiment · Physics 2016-09-28 M. Slawinska

In our previous work [Phys. Rev. D 101 (2020) 075046], we have proposed to install FAr Detectors at the Electron Positron Collider (FADEPC) to enhance the discovery potential of long-lived particles (LLPs). In this study, we consider eight…

High Energy Physics - Phenomenology · Physics 2022-07-21 Minglun Tian , Zeren Simon Wang , Kechen Wang

In this paper, we propose a dedicated forward detector, FOREHUNT (FORward~Experiment~for~HUNdred~TeV), for 100 TeV FCC-hh for the detection of light long-lived particles (LLP) coming from $B$-meson decay. We calculate the signal acceptance…

High Energy Physics - Phenomenology · Physics 2024-09-06 Biplob Bhattacherjee , Herbi K. Dreiner , Nivedita Ghosh , Shigeki Matsumoto , Rhitaja Sengupta , Prabhat Solanki

FASER$\nu$ is a newly proposed experiment which will take data in run III of the LHC during 2021-2023. It will be located in front of the FASER detector, 480~m away from the ATLAS interaction point in the forward direction. Its main goal is…

High Energy Physics - Phenomenology · Physics 2020-10-28 Pouya Bakhti , Yasaman Farzan , Silvia Pascoli

After the first successful LHC run in 2010-2012, plans are actively advancing for a series of upgrades leading eventually to about above times the design-luminosity in about ten years. The larger luminosity will allow to perform precise…

Instrumentation and Detectors · Physics 2014-09-18 C. Gemme

Liquid Argon Time Projection Chambers are planned to comprise a central role in the future of the U.S. High Energy Physics neutrino program. In particular, this detector technology will form the basis for the 40 kton Deep Underground…

Instrumentation and Detectors · Physics 2020-09-22 Eric Church , Christopher Jackson , Richard Saldanha

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…

Neutrino detectors participate in the indirect search for the fundamental constituents of dark matter (DM) in form of weakly interacting massive particles (WIMPs). In WIMP scenarios, candidate DM particles can pair-annihilate into Standard…

High Energy Astrophysical Phenomena · Physics 2020-04-22 The ANTARES Collaboration

Planned upgrades of the LHC over the next decade should allow the machine to operate at a center of mass energy of 14 TeV with instantaneous luminosities in the range 5--7e34 cm^-2 s^-1. With these parameters, ATLAS could collect 3,000…

Instrumentation and Detectors · Physics 2013-07-23 Gustaaf Brooijmans , Hal Evans , Abe Seiden