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Are light sneutrinos buried in LEP data?

Supersymmetry may resolve the disagreement between the precision electroweak data and the direct limit on the higgs mass, if there are light sneutrinos in the mass range 55 GeV $ < m_{\snu} < $ 80 GeV. Such sneutrinos should decay invisibly and contribute to the $\gamma$ + missing energy signa...

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Detalles Bibliográficos
Autor principal: Datta, A
Lenguaje:eng
Publicado: 2002
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2003.10.023
http://cds.cern.ch/record/586841
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author Datta, A
Datta, A
author_facet Datta, A
Datta, A
author_sort Datta, A
collection CERN
description Supersymmetry may resolve the disagreement between the precision electroweak data and the direct limit on the higgs mass, if there are light sneutrinos in the mass range 55 GeV $ < m_{\snu} < $ 80 GeV. Such sneutrinos should decay invisibly and contribute to the $\gamma$ + missing energy signal investigated by all the LEP groups. It is shown that while the data accumulated by a single group may not be adequate to reveal such sneutrinos, a combined analysis of the data collected by all four groups is already sensitive to $m_{\snu}$ in the above range. A large volume of LEP data at high energies awaiting analysis will improve the reach in $m_{\snu}$. If no signal is found a model independent lower bound on $m_{\snu}$ stronger than that obtained from the $Z$-pole data may emerge.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2002
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spelling cern-5868412019-09-30T06:29:59Zdoi:10.1016/j.physletb.2003.10.023http://cds.cern.ch/record/586841engDatta, ADatta, AAre light sneutrinos buried in LEP data?Particle Physics - PhenomenologySupersymmetry may resolve the disagreement between the precision electroweak data and the direct limit on the higgs mass, if there are light sneutrinos in the mass range 55 GeV $ < m_{\snu} < $ 80 GeV. Such sneutrinos should decay invisibly and contribute to the $\gamma$ + missing energy signal investigated by all the LEP groups. It is shown that while the data accumulated by a single group may not be adequate to reveal such sneutrinos, a combined analysis of the data collected by all four groups is already sensitive to $m_{\snu}$ in the above range. A large volume of LEP data at high energies awaiting analysis will improve the reach in $m_{\snu}$. If no signal is found a model independent lower bound on $m_{\snu}$ stronger than that obtained from the $Z$-pole data may emerge.hep-ph/0210218PM-0202-28oai:cds.cern.ch:5868412002-10-15
spellingShingle Particle Physics - Phenomenology
Datta, A
Datta, A
Are light sneutrinos buried in LEP data?
title Are light sneutrinos buried in LEP data?
title_full Are light sneutrinos buried in LEP data?
title_fullStr Are light sneutrinos buried in LEP data?
title_full_unstemmed Are light sneutrinos buried in LEP data?
title_short Are light sneutrinos buried in LEP data?
title_sort are light sneutrinos buried in lep data?
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/j.physletb.2003.10.023
http://cds.cern.ch/record/586841
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