Change search
ReferencesLink to record
Permanent link

Direct link
Search for a Neutral Higgs Boson with DELPHI
Stockholm University.
1998 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The mass of the neutral Higgs boson cannot be predicted by the Standard Model. Therefore, the particle is scanned for at different assumed masses. The search described here was done using data taken with the DELPHI detector during 1993-1994 (Ecm=91 GeV), 1996 (Ecm=161 and 172 GeV) and during 1997 (Ecm=183 GeV).

The Higgs boson was searched for through the Bjorken process where the decay of the Z* into two neutrinos was assumed. In order to reduce the background to a level where a discovery would be possible, new analysis methods using discriminant analysis were developed. This led to a very good background rejection and high signal efficiency. One event, with a mass of 27.5±3.6 GeV/c2, was selected from the 1993 real data at Ecm=91 GeV; one event, mH=64.6+2.4-1.2 GeV/c2, from 1996 at Ecm=161 GeV; and one event, mH=88 GeV/c2, from 1997.

In the absence of a clear signal, these results were translated into a limit on the Higgs boson mass mH>58.3 GeV/c2 with 1993 data, verified with 1994 data, mH>64.6 GeV/c2 with 1996 data, and mH>85.7 GeV/c2 with 1997 data; all at 95% confidence level.

Place, publisher, year, edition, pages
Stockholm: Stockholm University , 1998. , 39 p.
National Category
Physical Sciences
Research subject
URN: urn:nbn:se:su:diva-62390ISBN: 91-7153-798-8OAI: diva2:441558
Public defence
1998-09-18, 10:00
Härtill 8 uppsatserAvailable from: 2011-09-16 Created: 2011-09-16 Last updated: 2011-09-16Bibliographically approved

Open Access in DiVA

No full text

By organisation
Stockholm University
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 18 hits
ReferencesLink to record
Permanent link

Direct link