Search for Long-Lived Particles in e[superscript +]e[superscript -] Collisions
Name
PhysRevLett.114.171801.pdf
Size
1.06 MB
Format
Adobe PDF
Checksum (MD5)
68c8c56f942665bb50be7ee3e7d9cef2
Author(s)
Lees, J. P.
Poireau, V.
Tisserand, V.
Grauges, E.
Palano, A.
Eigen, G.
Stugu, B.
Brown, D. N.
Kerth, L. T.
Kolomensky, Yu. G.
Date Issued
April 2015
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Lees, J. P., et al. "Search for Long-Lived Particles in e[superscript +]e[superscript -] Collisions." Phys. Rev. Lett. 114, 171801 (April 2015). © 2015 American Physical Society
Version
Final published version
Abstract
We present a search for a neutral, long-lived particle L that is produced in e[superscript +]e[superscript -] collisions and decays at a significant distance from the e[superscript +]e[superscript -] interaction point into various flavor combinations of two oppositely charged tracks. The analysis uses an e[superscript +]e[superscript -] data sample with a luminosity of 489.1 fb[superscript -1] collected by the BABAR detector at the ϒ(4S), ϒ(3S), and ϒ(2S) resonances and just below the ϒ(4S). Fitting the two-track mass distribution in search of a signal peak, we do not observe a significant signal, and set 90% confidence level upper limits on the product of the L production cross section, branching fraction, and reconstruction efficiency for six possible two-body L decay modes as a function of the L mass. The efficiency is given for each final state as a function of the mass, lifetime, and transverse momentum of the candidate, allowing application of the upper limits to any production model. In addition, upper limits are provided on the branching fraction B(B → X[subscript s]L), where X[subscript s] is a strange hadronic system.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevLett.114.171801
