Search for long-lived particles decaying into electron or photon pairs with the D0 detector

Journal Article · Sun Jun 01 00:00:00 EDT 2008 · Submitted to Phys.Rev.Lett.

DOI:https://doi.org/10.1103/PhysRevLett.101.111802· OSTI ID:937255

Abazov, V M; Abbott, B; Abolins, M; Acharya, B S; Adams, M; Adams, T; Aguilo, E; Ahsan, M; Alexeev, G D; Alkhazov, G; Alton, A

In this Letter we report on a search for long-lived particles that decay into final states with two electrons or photons. Such long-lived particles arise in a variety of theoretical models, like hidden valleys and supersymmetry with gauge-mediated breaking. By precisely reconstructing the direction of the electromagnetic shower we are able to probe much longer lifetimes than previously explored. We see no evidence of the existence of such long-lived particles and interpret this search as a quasi model-independent limit on their production cross section, as well as a limit on a long-lived fourth generation quark.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 937255
• Report Number(s): FERMILAB-PUB-08-169-E; arXiv eprint number arXiv:0806.2223; TRN: US0805776
• Journal Information: Submitted to Phys.Rev.Lett., Journal Name: Submitted to Phys.Rev.Lett.
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CROSS SECTIONS
DECAY
ELECTRONS
PHOTONS
PROBES
PRODUCTION
SUPERSYMMETRY
Experiment-HEP