Search for Invisibly Decaying Higgs Bosons with Large Decay Width Using the OPAL Detector at LEP

Details Search for Invisibly Decaying Higgs Bosons with Large Decay Width Using the OPAL Detector at LEP Search for Invisibly Decaying Higgs Bosons with Large Decay Width Using the OPAL Detector at LEP

2006-10-18

arxiv.org/abs/hep-ex/0610056v1

Eur.Phys.J.C49:457-472,2007

Physics

High Energy Physics

High Energy Physics - Experiment

30 pages, 10 figures, Submitted to Eur. Phys. J

Scientific paper

10.1140/epjc/s10052-006-0170-x

This paper describes a topological search for an invisibly decaying Higgs boson,H, produced via the Bjorken process (e+e- -> HZ). The analysis is based on data recorded using the OPAL detector at LEP at centre-of-mass energies from 183 to 209 GeV corresponding to a total integrated luminosity of 629pb-1. In the analysis only hadronic decays of the Z boson are considered. A scan over Higgs boson masses from 1 to 120 GeV and decay widths from 1 to 3000 GeV revealed no indication for a signal in the data. From a likelihood ratio of expected signal and Standard Model background we determine upper limits on cross-section times branching ratio to an invisible final state. For moderate Higgs boson decay widths, these range from about 0.07pb Mh = 60GeV) to 0.57pb (Mh = 114GeV). For decay widths above 200GeV the upper limits are of the order of 0.15pb. The results can be interpreted in general scenarios predicting a large invisible decay width of the Higgs boson. As an example we interpret the results in the so-called stealthy Higgs scenario. The limits from this analysis exclude a large part of the parameter range of this scenario experimentally accessible at LEP2.

Affiliated with

Also associated with

No associations

Rating

Search for Invisibly Decaying Higgs Bosons with Large Decay Width Using the OPAL Detector at LEP does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Search for Invisibly Decaying Higgs Bosons with Large Decay Width Using the OPAL Detector at LEP, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Search for Invisibly Decaying Higgs Bosons with Large Decay Width Using the OPAL Detector at LEP will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-99470