Search for Charged Higgs bosons

CERN. Geneva; ALEPH Collaboration; DELPHI Collaboration; L3 Collaboration; OPAL Collaboration; LEP Working Group for Higgs Boson Searches

Published July 11, 2001 | Version v1

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Search for Charged Higgs bosons

In the year 2000 the four LEP experiments have collected 870 pb-1 of data at energies between 200 and 209 GeV, with about 510 pb-1 above 206 GeV. These data have been combined with data sets collected earlier at lower energies. %The following 95% confidence level bounds have been obtained. For charged Higgs bosons predicted by two-doublet extensions of the Standard Model and decaying only into the channels H+->csbar and tau+nutau, a lower mass bound of 78.6 GeV is obtained, at the 95% confidence level.

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00004 \small \it The confidence level $1- CL_b$ as a function of \mHpm, for the branching ratio B(\Hp\ra\tp$\nu$)=0 and 1 (separate plots). The straight horizontal line at 50\% and the shaded bands represent the mean result and the symmetric $1\sigma$ and $2\sigma$ probability bands expected in the absence of a signal. The solid curve is the observed result and the dotted curve shows the median result expected for a signal when tested at the ``true" mass. md5:baec532ea5269511653ae1137401ef9a	13.5 kB	Preview Download
00003 \small \it The confidence level $1- CL_b$ as a function of \mHpm, for the branching ratio B(\Hp\ra\tp$\nu$)=0 and 1 (separate plots). The straight horizontal line at 50\% and the shaded bands represent the mean result and the symmetric $1\sigma$ and $2\sigma$ probability bands expected in the absence of a signal. The solid curve is the observed result and the dotted curve shows the median result expected for a signal when tested at the ``true" mass. md5:cead609707b932087849b60082adfe0d	12.6 kB	Preview Download
00005 \small \it The 95\% CL bounds on \mHpm\ as a function of the branching ratio B(\Hp\ra\tp$\nu$), combining the data collected by the four LEP experiments at energies from 189 to 209~GeV. The expected exclusion limits are indicated by the thin solid line and the observed limits by the thick solid one. The shaded area is excluded at the 95\% CL. md5:4a9516a352875523f9809cf21cf618d0	15.8 kB	Preview Download
00006 \small \it The 95\% CL bound on the production cross-section as a function of \mHpm\ for a branching ratio B(\Hp\ra\tp$\nu$)=0, combining the data collected by the four LEP experiments at energies from 189 to 209~GeV. The expected exclusion limits are indicated by the dashed line and the shaded bands (1 and 2 $\sigma$), the observed limit by the solid line. The dotted line represents the 2HD model computed charged Higgs cross-section at 206 GeV. md5:5d674d50049291250231d4c57b2d97b2	21.9 kB	Preview Download
00002 \small \it The confidence level $1- CL_b$ as a function of \mHpm, for the branching ratio B(\Hp\ra\tp$\nu$)=0 (topL3 alone, bottomADO combination). The straight horizontal line at 50\% and the shaded bands represent the mean result and the symmetric $1\sigma$ and $2\sigma$ probability bands expected in the absence of a signal. The solid curve is the observed result and the dotted curve shows the median result expected for a signal when tested at the ``true" mass. md5:1743853e9306e44befb9d0b5001dec32	13.5 kB	Preview Download
arXiv:hep-ex_0107031.pdf md5:6b5dc883c2824c3884f6b2ddb1dbe342	103.3 kB	Preview Download
00001 \small \it The confidence level $1- CL_b$ as a function of \mHpm, for the branching ratio B(\Hp\ra\tp$\nu$)=0 (topL3 alone, bottomADO combination). The straight horizontal line at 50\% and the shaded bands represent the mean result and the symmetric $1\sigma$ and $2\sigma$ probability bands expected in the absence of a signal. The solid curve is the observed result and the dotted curve shows the median result expected for a signal when tested at the ``true" mass. md5:d3153e47a81af69fee16464c5ec46c68	12.0 kB	Preview Download

Additional details

Subtitle: Preliminary Combined Results Using LEP data Collected at Energies up to 209 GeV

CDS: 508860
CDS Report Number: LHWG-NOTE-2001-05
CDS Report Number: ALEPH-2001-043
CDS Report Number: PHYSICS-2001-016
CDS Report Number: DELPHI-2001-115
CDS Report Number: CERN-L3-NOTE-2689
CDS Report Number: OPAL-TN-696
CDS Report Number: LHWG-note-2001-05
CDS Report Number: DELPHI-2001-115-CONF-538
CDS Report Number: CERN-DELPHI-2001-115-CONF-538
CDS Report Number: L3-Notes-2689
CDS Report Number: CERN-ALEPH-PHYSICS-2001-016
Aleph number: 002264435CER

Is variant form of: Other: 559834 (Inspire); Other: arXiv:hep-ex/0107031 (arXiv); Other: OPAL-TN-696 (CDS Report Number); Other: ALEPH-2001-043 (CDS Report Number)
References: Other: http://weblib.cern.ch/abstract?CERN-L3-NOTE-2689 (URL)

Available: 2001

published

Department: EP - Experimental Physics Department
Accelerator: CERN LEP
Experiment: OPAL , ALEPH , DELPHI , L3

Inspire: C01-07-23.1
Inspire: C01-07-12

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