What if Charged Current Events at Large $Q^2$ are Observed at HERA?

An excess of events at large Q2 with a positron in the final state has been observed at HERA which, if confirmed, would be a signal of new physics. It is not clear at present if a signal of comparable rate is also seen in the charged current channel (with an antineutrino in the final state). In this...

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Detalles Bibliográficos
Autores principales: Altarelli, Guido, Giudice, G.F., Mangano, Michelangelo L.
Lenguaje:eng
Publicado: 1997
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/S0550-3213(97)00534-8
http://cds.cern.ch/record/325700
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author Altarelli, Guido
Giudice, G.F.
Mangano, Michelangelo L.
author_facet Altarelli, Guido
Giudice, G.F.
Mangano, Michelangelo L.
author_sort Altarelli, Guido
collection CERN
description An excess of events at large Q2 with a positron in the final state has been observed at HERA which, if confirmed, would be a signal of new physics. It is not clear at present if a signal of comparable rate is also seen in the charged current channel (with an antineutrino in the final state). In this note we analyse the implications of the presence of such a signal in models of new physics based on contact terms, leptoquarks and squarks with R-violating decays. We find that in all cases the most likely possibility is that the charged current signal is absent. As a consequence if this signal is present the resulting indications are very selective. In particular for squarks only charged current events with multi-quark final states are possible with quite definite predictions on the spectrum of supersymmetric particles.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1997
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spelling cern-3257002021-09-17T02:49:41Zdoi:10.1016/S0550-3213(97)00534-8http://cds.cern.ch/record/325700engAltarelli, GuidoGiudice, G.F.Mangano, Michelangelo L.What if Charged Current Events at Large $Q^2$ are Observed at HERA?Particle Physics - PhenomenologyAn excess of events at large Q2 with a positron in the final state has been observed at HERA which, if confirmed, would be a signal of new physics. It is not clear at present if a signal of comparable rate is also seen in the charged current channel (with an antineutrino in the final state). In this note we analyse the implications of the presence of such a signal in models of new physics based on contact terms, leptoquarks and squarks with R-violating decays. We find that in all cases the most likely possibility is that the charged current signal is absent. As a consequence if this signal is present the resulting indications are very selective. In particular for squarks only charged current events with multi-quark final states are possible with quite definite predictions on the spectrum of supersymmetric particles.An excess of events at large Q2 with a positron in the final state has been observed at HERA which, if confirmed, would be a signal of new physics. It is not clear at present if a signal of comparable rate is also seen in the charged current channel (with an antineutrino in the final state). In this note we analyse the implications of the presence of such a signal in models of new physics based on contact terms, leptoquarks and squarks with R-violating decays. We find that in all cases the most likely possibility is that the charged current signal is absent. As a consequence if this signal is present the resulting indications are very selective. In particular for squarks only charged current events with multi-quark final states are possible with quite definite predictions on the spectrum of supersymmetric particles.An excess of events at large Q2 with a positron in the final state has been observed at HERA which, if confirmed, would be a signal of new physics. It is not clear at present if a signal of comparable rate is also seen in the charged current channel (with an antineutrino in the final state). In this note we analyse the implications of the presence of such a signal in models of new physics based on contact terms, leptoquarks and squarks with R-violating decays. We find that in all cases the most likely possibility is that the charged current signal is absent. As a consequence if this signal is present the resulting indications are very selective. In particular for squarks only charged current events with multi-quark final states are possible with quite definite predictions on the spectrum of supersymmetric particles.An excess of events at large Q 2 with a positron in the final state has been observed at HERA which, if confirmed, could be a signal of new physics. It is not clear at present if a signal of comparable rate is also seen in the charged-current channel (with an antineutrino in the final state). In this note we analyse the implications of the presence of such a signal in models of new physics based on contact tehep-ph/9705287CERN-TH-97-101CERN-TH-97-101oai:cds.cern.ch:3257001997-05-12
spellingShingle Particle Physics - Phenomenology
Altarelli, Guido
Giudice, G.F.
Mangano, Michelangelo L.
What if Charged Current Events at Large $Q^2$ are Observed at HERA?
title What if Charged Current Events at Large $Q^2$ are Observed at HERA?
title_full What if Charged Current Events at Large $Q^2$ are Observed at HERA?
title_fullStr What if Charged Current Events at Large $Q^2$ are Observed at HERA?
title_full_unstemmed What if Charged Current Events at Large $Q^2$ are Observed at HERA?
title_short What if Charged Current Events at Large $Q^2$ are Observed at HERA?
title_sort what if charged current events at large $q^2$ are observed at hera?
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/S0550-3213(97)00534-8
http://cds.cern.ch/record/325700
work_keys_str_mv AT altarelliguido whatifchargedcurrenteventsatlargeq2areobservedathera
AT giudicegf whatifchargedcurrenteventsatlargeq2areobservedathera
AT manganomichelangelol whatifchargedcurrenteventsatlargeq2areobservedathera

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