Beam Purity for Light Dark Matter Search in Beam Dump Experiments. (2nd July 2015)

• Record Type: Journal Article
• Authors: Banerjee, D.; Crivelli, P.; Rubbia, A.
• Other Names: Asselmeyer-Maluga Torsten Academic Editor.
• Is Part Of: Advances in high energy physics. Volume 2015(2015)
• Publication Date: 2015-07-02
• Subjects: Particles (Nuclear physics) -- Periodicals; Particles (Nuclear physics); Periodicals; 539.76
• DOI: 10.1155/2015/105730
• Languages: English
• ISSNs: 1687-7357

Abstract

Abstract : This paper reviews the search for light dark matter in beam dump experiments with a special emphasis on the necessity of beam purity for precise background rejection at the sensitivities aimed at these experiments. As a case study we cite the P348 experiment which has test beam time in Fall 2015 at the SPS H4 beam line at CERN and aims to search for theU ′ ( 1 ) gauge boson, A ′, which as per one model of dark matter mediates a weak interaction between ordinary matter and dark matter via mixing of these "dark photons" with ordinary photon. The experiment aims to probe the still unexplored area of mixing strength1 0 - 5 ≤ ϵ ≤ 1 0 - 3 and massesM A ′ ≤ 100 MeV by using 10–300 GeV electron beam from the CERN SPS. This paper presents the simulation results for rejection of background due to beam impurity, by tracking the incoming particles with Micromegas detectors at a level <1 0 - 10 .