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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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Lenguaje: | eng |
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2002
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Acceso en línea: | https://dx.doi.org/10.1016/j.physletb.2003.10.023 http://cds.cern.ch/record/586841 |
_version_ | 1780899557883772928 |
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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. |
id | cern-586841 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2002 |
record_format | invenio |
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 |
work_keys_str_mv | AT dattaa arelightsneutrinosburiedinlepdata AT dattaa arelightsneutrinosburiedinlepdata |