Reconciling the LEP and SLAC measurements of sin$^{2}\vartheta_{w}$

We consider whether a discrepancy between the SLAC and LEP measurements of \Sw can be explained by new physics. We find that only the contribution of a new neutral gauge boson, Z^\prime, nearly degenerate with the Z can affect the SLAC measurement while leaving the LEP observables almost unaffected....

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Detalles Bibliográficos
Autores principales: Caravaglios, Francesco, Ross, Graham G.
Lenguaje:eng
Publicado: 1994
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/0370-2693(94)01628-P
http://cds.cern.ch/record/270645
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author Caravaglios, Francesco
Ross, Graham G.
author_facet Caravaglios, Francesco
Ross, Graham G.
author_sort Caravaglios, Francesco
collection CERN
description We consider whether a discrepancy between the SLAC and LEP measurements of \Sw can be explained by new physics. We find that only the contribution of a new neutral gauge boson, Z^\prime, nearly degenerate with the Z can affect the SLAC measurement while leaving the LEP observables almost unaffected. We briefly discuss possible signals for this new gauge boson, including changes in the Z lineshape when measured with polarised electrons, small changes in R_b, A^e_{FB}, and larger changes in two jet and t\bar{t} production at hadron colliders.
id cern-270645
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1994
record_format invenio
spelling cern-2706452023-03-14T18:56:13Zdoi:10.1016/0370-2693(94)01628-Phttp://cds.cern.ch/record/270645engCaravaglios, FrancescoRoss, Graham G.Reconciling the LEP and SLAC measurements of sin$^{2}\vartheta_{w}$Particle Physics - PhenomenologyWe consider whether a discrepancy between the SLAC and LEP measurements of \Sw can be explained by new physics. We find that only the contribution of a new neutral gauge boson, Z^\prime, nearly degenerate with the Z can affect the SLAC measurement while leaving the LEP observables almost unaffected. We briefly discuss possible signals for this new gauge boson, including changes in the Z lineshape when measured with polarised electrons, small changes in R_b, A^e_{FB}, and larger changes in two jet and t\bar{t} production at hadron colliders.We consider whether a discrepancy between the SLAC and LEP measurements of $\Sw$ can be explained by new physics. We find that only the contribution of a new neutral gauge boson, $Z~\prime$, nearly degenerate with the Z can affect the SLAC measurement while leaving the LEP observables almost unaffected. We briefly discuss possible signals for this new gauge boson, including changes in the $Z$ lineshape when measured with polarised electrons, small changes in $R_b$, $A~e_{FB}$, and larger changes in two jet and $t\bar{t}$ production at hadron colliders.We consider whether a discrepancy between the SLAC and LEP measurements of sin 2 θ w can be explained by new physics. We find that only the contribution of a new neutral gauge boson, Z ′, nearly degenerate with the Z can affect the SLAC measurement while leaving the LEP observables almost unaffected. We briefly discuss possible signals for this new gauge boson, including changes in the Z lineshape when measured with polarized electrons, small change in R b , A FB e , and larger changes in two jet and tt production at hadron colliders.hep-ph/9410322CERN-TH-7474-94OUTP-94-24-PCERN-TH-7474-94OUTP-94-24-Poai:cds.cern.ch:2706451994-10-19
spellingShingle Particle Physics - Phenomenology
Caravaglios, Francesco
Ross, Graham G.
Reconciling the LEP and SLAC measurements of sin$^{2}\vartheta_{w}$
title Reconciling the LEP and SLAC measurements of sin$^{2}\vartheta_{w}$
title_full Reconciling the LEP and SLAC measurements of sin$^{2}\vartheta_{w}$
title_fullStr Reconciling the LEP and SLAC measurements of sin$^{2}\vartheta_{w}$
title_full_unstemmed Reconciling the LEP and SLAC measurements of sin$^{2}\vartheta_{w}$
title_short Reconciling the LEP and SLAC measurements of sin$^{2}\vartheta_{w}$
title_sort reconciling the lep and slac measurements of sin$^{2}\vartheta_{w}$
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/0370-2693(94)01628-P
http://cds.cern.ch/record/270645
work_keys_str_mv AT caravagliosfrancesco reconcilingthelepandslacmeasurementsofsin2varthetaw
AT rossgrahamg reconcilingthelepandslacmeasurementsofsin2varthetaw

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