Impact of e^+ and e^- Beam Polarization on Chargino and Neutralino Production at a Linear Collider

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dc.creatorMoortgat-Pick, G.
dc.creatorBartl, A.
dc.creatorFraas, H.
dc.creatorMajerotto, W.
dc.date2000-07-20
dc.date.accessioned2026-07-07T12:26:01Z
dc.date.available2026-07-07T12:26:01Z
dc.descriptionWe study the production processes e^+ e^- -> chi^+_i chi^-_j, i,j=1,2, and e^+ e^- -> chi^0_m chi^0_n, m,n=1,...,4, working out the advantages of polarizing both beams. For e^+ e^- -> chi^+_1 chi^-_1 with chi^-_1 -> chi^0_1 e^- nu and e^+ e^- -> chi^0_1 chi^0_2 with chi^0_2 -> chi^0_1 e^+ e^- we perform a detailed analysis, including the complete spin correlations between production and decay. We analyze the forward--backward asymmetry of the decay electron for various beam polarizations. We also study polarization asymmetries in e^+ e^- -> chi^0_1 chi^0_2. These asymmetries strongly constrain the gaugino parameter M_1 and the masses m_{\tilde{e}_L}, m_{\tilde{e}_R}, m_{\tilde{nu}} also if m_{\tilde{e}_{L,R}}, m_{\tilde{nu}} > sqrt{s}/2. We give numerical predictions for three scenarios for a linear collider with sqrt{s}=500-1000 GeV.
dc.description26 pages, 26 postscript figures, latex using epsfig
dc.identifierhttps://arxiv.org/abs/hep-ph/0007222
dc.identifierhttp://arxiv.org/abs/hep-ph/0007222
dc.identifierEur.Phys.J.C18:379-391,2000
dc.identifierdoi:10.1007/s100520000501
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/214751
dc.subjectHigh Energy Physics - Phenomenology
dc.titleImpact of e^+ and e^- Beam Polarization on Chargino and Neutralino Production at a Linear Collider
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