Claudia Frugiuele Mixing stops at the LHC in collaboration with P - PowerPoint PPT Presentation

Claudia Frugiuele Mixing stops at the LHC in collaboration with P . Agrawal hep ph 1304.3068 GGI 07/06/2013 Monday, 10 June 13

SUSY after the LHC first run Summary of CMS SUSY Results* in SMS framework LHCP 2013 m(mother)-m(LSP)=200 GeV m(LSP)=0 GeV ~ ∼ 0 g → qq χ SUS-12-028 L=11.70 /fb ~ ∼ 0 g qq → χ SUS-12-005 SUS-11-024 L=4.70 /fb ~ ∼ 0 g bb → χ SUS-12-024 SUS-12-028 L=19.40 11.70 /fb ~ ∼ 0 gluino production g → tt χ SUS-13-007 SUS-13-008 L=19.40 19.50 /fb ~ 0 - 0 ∼ + ∼ g qq ( l l ) → χ → χ SUS-11-011 L=4.98 /fb 2 ~ ∼ ∼ 0 ∼ 0 2 g → qq( χ → τ τ χ | χ ) SUS-12-004 L=4.98 /fb ~ ∼ ∼ 0 ∼ 0 x = 0.25 ± g qq( W | ) SUS-12-010 L=4.98 /fb → χ → χ χ x = 0.50 x = 0.75 ~ ~ ∼ 0 g → t( t → t χ ) SUS-13-008 L=19.50 /fb ~ ∼ ∼ 0 ± ± g qq( l ) SUS-11-010 L=4.98 /fb → χ → ν χ ~ 0 0 ∼ ∼ x = 0.25 g qq ( Z ) SUS-11-021 SUS-12-002 L=4.98 4.73 /fb → χ → χ x = 0.50 x = 0.75 2 ~ 0 0 0 ∼ ∼ ∼ ∼ ± g → qq( χ → γ χ | χ → W χ ) SUS-12-001 L=4.93 /fb 2 0 0 ~ ∼ ∼ g qq( ) SUS-12-001 L=4.93 /fb → χ → γ χ 2 ~ ∼ 0 g btW SUS-13-008 L=19.50 /fb → χ ~ ∼ 0 squark q q SUS-12-028 L=11.70 /fb → χ ~ ∼ 0 q q SUS-12-005 SUS-11-024 L=4.70 /fb → χ ~ ∼ 0 left-handed top t t SUS-13-011 L=19.50 /fb → χ unpolarized top right-handed top ~ ∼ 0 t → t χ SUS-11-024 SUS-12-005 L=4.70 /fb stop ~ ∼ ∼ 0 + x = 0.25 t b( W ) → χ → χ SUS-13-011 L=19.50 /fb x = 0.50 x = 0.75 ~ ∼ ∼ 0 + t b( W ) → χ → χ SUS-11-030 L=4.98 /fb ~ s = 7 TeV 0 ∼ sbottom b b SUS-12-028 L=11.70 /fb → χ ~ 0 ∼ SUS-13-008 SUS-12-017 L=19.50 10.50 /fb b tW → χ s = 8 TeV ~ 0 ∼ SUS-13-008 L=19.50 /fb b bZ → χ EWK gauginos 0 0 0 ∼ ∼ ∼ ∼ x = 0.05 ± χ χ → lll ν χ χ SUS-12-022 L=9.20 /fb x = 0.50 x = 0.95 CMS Preliminary 2 0 0 0 ∼ ∼ ± ∼ ∼ SUS-12-022 L=9.20 /fb χ χ → τ τ τ ν χ χ 2 ∼ ∼ - - ∼ 0 ∼ 0 + + l l SUS-12-022 L=9.20 /fb χ χ → ν ν χ χ 0 0 0 ∼ ∼ ∼ ∼ ± χ χ → W Z χ χ SUS-12-022 L=9.20 /fb For decays with intermediate mass, 2 0 0 0 ∼ ∼ ± ∼ ∼ x = 0.05 ll SUS-12-022 L=9.20 /fb χ χ → τ ν χ χ x = 0.50 m = x m -(1-x) m ⋅ ⋅ x = 0.95 2 intermediate mother lsp ~ slepton 0 ∼ SUS-12-022 L=9.20 /fb l l → χ 0 200 400 600 800 1000 1200 *Observed limits, theory uncertainties not included Mass scales [GeV] Only a selection of available mass limits Probe *up to* the quoted mass limit Monday, 10 June 13

Natural SUSY after the first run Bounds on gluinos and degenerate1&2 generation squarks reached the TeV threshold... Plot from Weiler talk on natural susy limits on gluino are already in tension with naturalness Dirac gluinos? Monday, 10 June 13

Natural SUSY after the first run Bounds on Gluinos and degenerate1&2 generation squarks reached the TeV threshold... Plot from Weiler talk on natural susy agnostic about the mechanism to raise the Higgs mass limits on gluino are already in tension with naturalness Dirac gluinos? Monday, 10 June 13

Naturalness+LHC bounds on squarks suggest SUSY breaking mediation knows about flavor exploring other structure beyond MFV what does this imply for the LHC pheno? No much freedom in the MSSM due to the severe flavor problem somewhat large mixing allowed between right handed stop and charm ( Blanke,Giudice,Paradisi,Perez,Zupan,’13) Monday, 10 June 13

Beyond the MSSM? Having R symmetry ameliorates the flavor problem kribs,weiner,poppitz ’07 most of the dangerous contributions to flavor observable arise from R violating terms: • Majorana masses for the gauginos • A term • Mu term Monday, 10 June 13

∆ F = 2 gluino Majorana mass insertion ∆ F = 1 mu term Monday, 10 June 13

EDM bounds µ → e γ no chirality flip from Majorana mass insertion or mu term suppressed by the Yukawa coupling Monday, 10 June 13

Flavor problem relaxed but not solved some flavor structure still required c li s d d f Mixing between first&second generation still suppressed by K0K0 mixing M 2 δ = 12 √ M 2 11 M 2 22 even stronger bounds considering ✏ K Monday, 10 June 13

R symmetry relax several of the flavor bounds interesting ingredient to build a flavorful SUSY breaking mediation mechanism allows larger flavor violation in the squark sector what is the impact of this on the LHC phenomenology? Monday, 10 June 13

Mixed third generation at the LHC M 2 M 2 δ LL/RR δ LL/RR or = 13 33 ∼ 1 = 23 33 ∼ 1 √ √ 13 23 M 2 11 M 2 M 2 22 M 2 single top production kribs,martin,roy’09 Flavor violating (FV) decay mode of the stop is dominant in a large region of the parameter space Monday, 10 June 13

(Light) stop NLSP t → b χ ± ˜ kinematically forbidden LSP gravitino, singlino or bino better if it is pseudo-dirac natural region if the stop is light t < µ < 300GeV m ˜ ˜ t → t LSP t < m t + m LSP m ˜ also kinematically forbidden Monday, 10 June 13

FV decay mode dominates over the 3 body decay 0.10 contour plot BR (˜ t → χ 0 j ) = 90% 0.08 t − m LSP = 150 GeV m ˜ more compressed spectrum FV dominates for even smaller mixing angle 0.06 sin 2 q 0.04 BR (˜ 0.02 t → Gj ) = 90% 0.00 150 200 250 300 350 400 ~ @ GeV D m t Monday, 10 June 13

Significant BR also when the decay into top+LSP is open! 0.35 BR (˜ massless LSP t → j χ 0 ) = 50% BR (˜ t → j χ 0 ) = 75% 0.30 BR (˜ t → jG ) = 75% 0.25 light stop FV is still 0.20 the dominant decay mode sin 2 q 0.15 0.10 0.05 BR (˜ t → jG ) = 50% 0.00 180 200 220 240 260 280 300 ~ @ GeV D m t Monday, 10 June 13

Significant BR also when the decay into top+LSP is open! 0.35 BR (˜ massless LSP t → j χ 0 ) = 50% BR (˜ t → j χ 0 ) = 75% 0.30 BR (˜ t → jG ) = 75% 0.25 light stop FV is still 0.20 the dominant decay mode sin 2 q heavier stops FV 0.15 t → j LSP) ∼ sin 2 θ BR (˜ 0.10 0.05 BR (˜ t → jG ) = 50% 0.00 180 200 220 240 260 280 300 ~ @ GeV D m t Monday, 10 June 13

Significant BR also when the decay into top+LSP is open! 0.35 BR (˜ massless LSP t → j χ 0 ) = 50% BR (˜ t → j χ 0 ) = 75% 0.30 BR (˜ t → jG ) = 75% 0.25 light stop FV is still 0.20 the dominant decay mode sin 2 q heavier stops FV 0.15 t → j LSP) ∼ sin 2 θ BR (˜ 0.10 0.05 BR (˜ t → jG ) = 50% relax the bounds on the stop mass 0.00 (blanke et al) 180 200 220 240 260 280 300 ~ @ GeV D m t Monday, 10 June 13

MSSM with MFV θ tc ∼ vAy t y b V cb V ∗ log Λ UV ∼ 10 − 5 tb 16 π 2 ˜ m 2 m ˜ CKM suppressed FV significant only for t < m b + m W + m LSP m ˜ compete with the 4 body decay Monday, 10 June 13

Tevatron dedicated searches covered just the parameter space relevant for the MSSM ˜ t → c LSP CDF what about this region? Monday, 10 June 13

Stops searches at the LHC both ATLAS and CMS are looking for stops in ˜ ˜ t → t χ 0 t → b χ + ~ ~ t t production Status: LHCP 2013 1 1 600 [GeV] -1 -1 ATLAS Preliminary L = 20 - 21 fb s =8 TeV L = 4.7 fb s =7 TeV int int ~ � 0 0L, t t � � 0L ATLAS-CONF-2013-024 0L [1208.1447] 1 ~ 1 � 0 1L, t t � � 1L ATLAS-CONF-2013-037 1L [1208.2590] ~ 1 0 1 1 500 � 0 � � Observed limits 2L, t t � � - 2L [1209.4186] m ~ 1 1 � 0 2L, t W b � � 2L ATLAS-CONF-2013-048 - 1 1 0L, m = m + 5 GeV Observed limits (-1 ) � � 0 � ± � 0L ATLAS-CONF-2013-053 - ~ theo � ± 1 1 1-2L, t b , m = 106 GeV � � 1 - 2L [1208.4305], 1-2L [1209.2102] ~ ± 1 � � Expected limits ± 1 1L, t b , m = 150 GeV � � 1 1L ATLAS-CONF-2013-037 - ~ ± 1 � � 400 ± 1 2L, t � b � , m = m ~ - 10 GeV t 1 2L ATLAS-CONF-2013-048 - ~ ± 1 � 1 � ± 1-2L, t b , m 1 = 2 m � � × � 0 1 1L CONF-2013-037, 2L CONF-2013-048 1-2L [1209.2102] ± 1 � � 1 1 ~ ~ ~ � � (*) � 0 � 0 � 0 ± ± t � b � , � � W � t � t � / t � W b � 1 1 1 1 1 1 1 1 300 +5 GeV) 0 0 + m � = m � 0 � 1 � � m � 1 1 + m W t + m ( m � ± < � 1 ~ m t < m b 1 ± +m � � 1 ) m 0 ~ � < m m � t 1 b × 200 2 1 m = m + 5 GeV � 0 = ± � � ~ 1 m 1 m ± t � 1 ( � -1 m = m - 10 GeV L = 20.1 fb 1 ~ m � ± ± t int � + � 1 1 1 -1 m L = 20.3 fb b < int ~ m t 1 m = 2 × m � 0 � ± 100 � 1 1 -1 L = 20-21 fb int m < 103.5 GeV � ± � 1 -1 L = 4.7 fb -1 int L 21 fb � int m < 106 GeV 0 � � ± W b � m = 150 GeV � ± 1 � m = 106 GeV 1 ± 1 -1 � L = 20.7 fb -1 1 -1 int L = 20 fb L = 4.7 fb int int 0 200 300 400 500 600 100 200 300 400 500 600 700 m [GeV] ~ t 1 Monday, 10 June 13