Detection of heavy charged Higgs bosons in e+ e- -> t anti-b H- production at future linear colliders
Detection of heavy charged Higgs bosons in e+ e- -> t anti-b H- production at future linear colliders
Heavy charged Higgs bosons (H±) of a Type II 2-Higgs doublet model (2HDM) can be detected at future electron–positron Linear Colliders (LCs) even when their mass is larger than half the collider energy. The single Higgs mode e+e- → t¯bH-+ c.c. → 4b+jj+ℓ+pmissT (where j represents a jet and with ℓ = e,µ) contributes to extend the discovery reach of H± states into the mass region MH± √s/2, where the well studied pair production channel e+e- → H-H+ is no longer available. With a technique that allows one to reconstruct the neutrino four-momentum in the decay t → bW+ →bℓ+ν, one can suppress the initially overwhelming main irreducible background due to e+e- → t¯tb¯b (via a gluon splitting into b¯b pairs) to a negligible level. However, for currently foreseen luminosities, one can establish a statistically significant H± signal only over a rather limited mass region, of 20 GeV or so, beyond MH± ~ √s/2, for very large or very small values of tan β and provided high b-tagging efficiency can be achieved.
157-163
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
May 2004
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Moretti, S.
(2004)
Detection of heavy charged Higgs bosons in e+ e- -> t anti-b H- production at future linear colliders.
The European Physical Journal C, 34, .
(doi:10.1140/epjc/s2004-01668-9).
Abstract
Heavy charged Higgs bosons (H±) of a Type II 2-Higgs doublet model (2HDM) can be detected at future electron–positron Linear Colliders (LCs) even when their mass is larger than half the collider energy. The single Higgs mode e+e- → t¯bH-+ c.c. → 4b+jj+ℓ+pmissT (where j represents a jet and with ℓ = e,µ) contributes to extend the discovery reach of H± states into the mass region MH± √s/2, where the well studied pair production channel e+e- → H-H+ is no longer available. With a technique that allows one to reconstruct the neutrino four-momentum in the decay t → bW+ →bℓ+ν, one can suppress the initially overwhelming main irreducible background due to e+e- → t¯tb¯b (via a gluon splitting into b¯b pairs) to a negligible level. However, for currently foreseen luminosities, one can establish a statistically significant H± signal only over a rather limited mass region, of 20 GeV or so, beyond MH± ~ √s/2, for very large or very small values of tan β and provided high b-tagging efficiency can be achieved.
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Published date: May 2004
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Local EPrints ID: 57478
URI: http://eprints.soton.ac.uk/id/eprint/57478
ISSN: 1434-6044
PURE UUID: 40703aae-663e-4b59-a835-f07f690966ee
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Date deposited: 15 Aug 2008
Last modified: 16 Mar 2024 03:34
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