First constraint on the mass of doubly-charged Higgs bosons in the same-sign diboson decay scenario at the LHC - INSPIRE

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First constraint on the mass of doubly-charged Higgs bosons in the same-sign diboson decay scenario at the LHC

Shinya Kanemura
(
- Toyama U.
)
,
Kei Yagyu
(
- Taiwan, Natl. Central U.
)
,
Hiroshi Yokoya
(
- Toyama U.
)

May 10, 2013

4 pages

Published in:

Phys.Lett.B 726 (2013) 316-319

Published: Oct 7, 2013

e-Print:

1305.2383 [hep-ph]

DOI:

10.1016/j.physletb.2013.08.054

Report number:

UT-HET-080

View in:

ADS Abstract Service

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Abstract: (Elsevier)

When the doubly-charged Higgs bosons H±± mainly decay into the same-sign dilepton, a lower bound on the mass is around 400 GeV by the current LHC data. On the other hand, no such bound has been reported by using the data at LEP and at the LHC for the case where the same-sign diboson decay H±±→W±(⁎)W±(⁎) is dominant. We study limits on the mass for such a case by using the current experimental data. From the precise measurement of the total width of the Z boson at the LEP experiment, the mass below 43 GeV is excluded with the 95% confidence level. It turns out that the results from four charged-lepton searches at LEP do not provide any significant constraint. We show that a new lower bound is obtained in the diboson decay scenario at the LHC with the collision energy to be 7 TeV and the integrated luminosity to be 4.7 fb−1 . By using the data of the same-sign dilepton events, the lower limit is found to be 60 GeV at the 95% confidence level. By the extrapolation of the data to 20 fb−1 with the same collision energy, the lower limit is evaluated to be 85 GeV.

Note:

References are added, a comment is added

new physics
dilepton: same sign
charge: 2
Z0: width
CERN LHC Coll
CERN LEP Stor
Higgs particle: mass
Higgs particle: charged particle
parameter space
Higgs particle --> W W

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