Other Searches at LEP Sylvie Braibant CERN Moriond QCD week March 2001 RPV-SUSY GMSB Technicolor Excited leptons Leptoquarks
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN2 Searches Variants R-parity conserving SUSY (LSP stable missing energy) Standard SUSY: neutralino LSP (see T. Alderweireld’s talk) GMSB: gravitino LSP G light G (eV GeV) with possibly long lifetime of slepton or neutralino NLSP: either 1 or super-light G ( eV) R-parity violating SUSY (LSP decays to SM particles) vast field with very different signatures Exotics Technicolor Leptoquarks Excited Leptons ~ ~ ~ ~ ~ 0
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN3 RPV SUSY: Superpotential
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN4 RPV SUSY: R-Parity Assumptions exactly 1 -like coupling different from 0 at the time mean path of flight 10 -4
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN5 RPV SUSY: Production Mechanisms
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN6 RPV SUSY:Gaugino Searches
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN7 RPV SUSY: Gaugino Searches for m 1 > 40 GeV ~0
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN8 RPV SUSY: Gaugino Searches for ’ Final states contain many jets and leptons
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN9 RPV SUSY: Gaugino Searches for ’’ Final states with up to 10 jets m 1 > 38 GeV ~0
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN10 RPV SUSY: Slepton Searches
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN11 RPV SUSY: Slepton Searches - MSSM limits ’’ Similar results for squarks, sneutrinos for RPV, ’, ’’ decays
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN12 RPV SUSY: Sneutrino Searches - Resonant Production
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN13 RPV SUSY Searches for R p -violating production and decay of SUSY particles are complementary to searches with R p -conservation Under the assumption of R p -violation, searches have been performed for gauginos, sleptons, sneutrinos and squarks for all Yukawa couplings, ’, ’’ No evidence for SUSY with R p -violation Exclusion limits are similar to the R p -conserving case
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN14 GMSB SUSY Searches: Light Gravitino Scenarios
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN15 GMSB SUSY Searches
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN16 GMSB SUSY Searches: Neutralino NLSP << L Det Acoplanar photons Zero Lifetime ~ L Det Single non-pointing photon Non-zero Lifetime 0
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN17 GMSB SUSY Searches: Neutralino NLSP Zero LifetimeAcoplanar photons
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN18 GMSB SUSY Searches: Neutralino NLSP Non-Zero Lifetime Non-pointing single photons
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN19 GMSB SUSY Searches: Slepton NLSP Zero Lifetime Acoplanar leptons Exclusion plots for Sleptons in gravity-mediated Large IP + kinks Large IP =O(1 mm)-O(40 cm) Kinks =O(10 cm)-O(2 m) Heavy stable charged particles dE/dx or RICH detectors 0
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN20 GMSB SUSY Searches: Slepton NLSP Combining searches in various regions of lifetime ~ Intermediate lifetime Searches for large impact parameters+ Searches for kinks
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN21 GMSB SUSY Searches: Sgoldstino e + e - Depends on m and √ F Most relevant decays: (4-11%) gg (96-89%) M 1 M 2 M 3 1) ) E = s - m 2 √ s 2
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN22 Technicolor Provides a scheme to generate W/Z masses. EW symmetry broken dynamically by strong interactions of gauge bosons. Introduces new technifermions which obey a QCD-like Interaction with an effective scale TC >> QCD At TC, TC interation becomes strong techniquark condensates replace non zero VEV of Higgs field: = F ~ 246 GeV Extensions are worked out to solve problems: These extensions call for a large number N D of technidoublets additional scalar ( T, ’ T ) and vector ( T T ) mesons which can be light enough to be observed at LEP2. TVTDTVTD _
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN23 Technicolor e + e - T ff(below WW threshold) e + e - T W + W - (above WW threshold) - T W ± T ±, T 0 T T - T + Important decays T + bc, bu --
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN24 Technicolor No significant contribution of technicolor production is observed 95% CL exclusion region in the (M T, M T ) plane
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN25 Excited Leptons
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN26 Exited Leptons
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN27 Excited Leptons Flavour95% mass limits (GeV) e*102.9 *102.9 *102.8
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN28 Leptoquarks Single ProductionPair Production
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN29 Leptoquarks Production
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN30 Leptoquarks Vector Leptoquarks
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN31 Leptoquarks Scalar Leptoquarks
Other Searches at LEP - Moriond 2001Sylvie Braibant - CERN32 Conclusions LEP has been a great success until its very end A broad spectrum of new particle searches have been and are actively pursued… but no indication for Physics beyond the SM Results are interpreted in various models Existing limits have been extended: plenty of preliminary results using all the data collected at LEP LEP SUSY working group combining results on: GMSB and RPV LEP exotica working group starting to combine results on: single top, excited leptons, leptoquarks We are working towards FINAL LEP results Apologies for results which were not shown Many thanks to my LEP colleagues who helped me to prepare this talk