SENSEI: Search for Millicharged Particles produced in the NuMI Beam
Abstract
Millicharged particles appear in several extensions of the Standard Model, but have not yet been detected. These hypothetical particles could be produced by an intense proton beam striking a fixed target. We use data collected in 2020 by the SENSEI experiment in the MINOS cavern at the Fermi National Accelerator Laboratory to search for ultra-relativistic millicharged particles produced in collisions of protons in the NuMI beam with a fixed graphite target. The absence of any ionization events with 3 to 6 electrons in the SENSEI data allow us to place world-leading constraints on millicharged particles for masses between 30 MeV to 380 MeV. This work also demonstrates the potential of utilizing low-threshold detectors to investigate new particles in beam-dump experiments, and motivates a future experiment designed specifically for this purpose.
Keywords
Cite
@article{arxiv.2305.04964,
title = {SENSEI: Search for Millicharged Particles produced in the NuMI Beam},
author = {Liron Barak and Itay M. Bloch and Ana M. Botti and Mariano Cababie and Gustavo Cancelo and Luke Chaplinsky and Michael Crisler and Alex Drlica-Wagner and Rouven Essig and Juan Estrada and Erez Etzion and Guillermo Fernandez Moroni and Roni Harnik and Stephen E. Holland and Yaron Korn and Zhen Liu and Sravan Munagavalasa and Aviv Orly and Santiago E. Perez and Ryan Plestid and Dario Rodrigues and Nathan A. Saffold and Silvia Scorza and Aman Singal and Miguel Sofo Haro and Leandro Stefanazzi and Kelly Stifter and Javier Tiffenberg and Sho Uemura and Tomer Volansky and Tien-Tien Yu},
journal= {arXiv preprint arXiv:2305.04964},
year = {2023}
}
Comments
7 pages, 5 figures