The Beam-Dump Ceiling and Its Experimental Implication: The Case of a Portable Experiment
arxiv(2024)
摘要
We generalize the nature of the so-called beam-dump "ceiling" beyond which
the improvement on the sensitivity reach in the search for fast-decaying
mediators dramatically slows down, and point out its experimental implications
that motivate tabletop-size beam-dump experiments for the search. Light
(bosonic) mediators are well-motivated new-physics particles as they can appear
in dark-sector portal scenarios and models to explain various laboratory-based
anomalies. Due to their low mass and feebly interacting nature, beam-dump-type
experiments, utilizing high-intensity particle beams can play a crucial role in
probing the parameter space of visibly decaying such mediators, in particular,
the “prompt-decay” region where the mediators feature relatively large
coupling and mass. We present a general and semi-analytic proof that the
ceiling effectively arises in the prompt-decay region of an experiment and show
its insensitivity to data statistics, background estimates, and systematic
uncertainties, considering a concrete example, the search for axion-like
particles interacting with ordinary photons at three benchmark beam facilities,
PIP-II at FNAL and SPS and LHC-dump at CERN. We then identify optimal criteria
to perform a cost-effective and short-term experiment to reach the ceiling,
demonstrating that very short-baseline compact experiments enable access to the
parameter space unreachable thus far.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要