Journal ArticleDOI
Search for Neutral Metastable Penetrating Particles Produced in the SLAC Beam Dump
James D. Bjorken,S. Ecklund,WR Nelson,A. Abashian,C Church,B Lu,L. W. Mo,TA Nunamaker,P Rassmann +8 more
TLDR
A search was made for neutral objects which might be produced by 20-GeV electrons incident on the SLAC beam dump, penetrate the downstream natural shielding, and decay upstream of an electromagnetic shower calorimeter.Abstract:
A search was made for neutral objects which might be produced by 20-GeV electrons incident on the SLAC beam dump, penetrate the downstream natural shielding, and decay upstream of an electromagnetic shower calorimeter. With about 30 C of electrons dumped, no candidate events were found above an energy of \ensuremath{\sim}2 GeV. The 95%-confidence-level limit on the product of mass and lifetime of light axionlike bosons decaying primarily into two photons is determined to be greater than 1.4 keV sec. Limits on photino parameters are also given.read more
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Journal ArticleDOI
New Fixed-Target Experiments to Search for Dark Gauge Forces
TL;DR: In this paper, the production and decay properties of new light gauge bosons were identified, and five new experimental approaches were proposed to cover most of the natural parameter space, using currently operating GeV-energy beams and well-established detection methods.
Journal ArticleDOI
The dawn of FIMP Dark Matter : A review of models and constraints
TL;DR: In this article, the authors present an overview of scenarios where the observed dark matter (DM) abundance consists of Feebly Interacting Massive Particles (FIMPs), produced nonthermally by the so-called freeze-in mechanism.
Journal ArticleDOI
Collider probes of axion-like particles
TL;DR: In this article, it was shown that the LHC provides unprecedented sensitivity to the ALP-photon and ALP-lepton couplings in the mass region above a few MeV, even if the relevant ALP couplings are loop suppressed and the a → ππππ branching ratios are significantly less than 1.
Journal ArticleDOI
Exotic decays of the 125 GeV Higgs boson
David Curtin,R. Essig,Stefania Gori,Stefania Gori,Stefania Gori,Prerit Jaiswal,Andrey Katz,Tao Liu,Zhen Liu,David McKeen,David McKeen,Jessie Shelton,Matthew J. Strassler,Ze'ev Surujon,Brock Tweedie,Brock Tweedie,Yi-Ming Zhong +16 more
TL;DR: A survey of nonstandard Higgs decays that are consistent with the 125-GeV Higgs-like resonance can be found in this paper, where a large set of new experimental analyses on the existing and forthcoming data from the Large Hadron Collider (LHC) are presented.
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Hunting All the Hidden Photons
TL;DR: In this paper, the authors apply the full constraining power of experimental bounds derived for a hidden photon of a secluded U(1)X and translate them to the considered gauge groups.
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