Explaining multilepton excess with Gauge Mediation

Transcription

1 Exlaining multileton excess with Gauge Mediation Karen De Causmaecker SUSY Manchester Based on J. D Hondt, K.D.C.,B. Fuks, A. Mariotti, K.Mawatari.,C. Petersson, D. Redigolo Phys.Lett. B73(24) 7-2 [he-h, arxiv:3.8]

2 .2 ± 2.4 events exected vs. 22 events observed

3 .2 ± 2.4 events exected vs. 22 events observed 5 sigma discovery of SUSY?

4 In which search does this excess occur? Can we exlain it with SUSY? Prosects

5 In which search does this excess occur? Can we exlain it with SUSY? Prosects

6 CMS searches for SUSY Slide from Henning Flaecher, lenary talk yesterday *! h h + G ~ ) Br(! Z h + G ~ ) Br( m 2 - CMS Preliminary L = 9.5 fb s = 8 TeV = m± = m ; m ~ = GeV G Combined exclusion regions, all analyses Observed Exected ± σ ex. σ ex Higgsino mass m (GeV) CMS Preliminary 3l GMSB Higgsino bbll Higgsino mass m (GeV) ±2 - L = 9.5 fb s = 8 TeV bbbb lljj SUS-4-2 & arxiv: Most sensitive analysis LSP mass [GeV] ± roduction CMS Preliminary s = 8 TeV ICHEP 24 - SUS fb - SUS fb m ± = m m ± = m m ± Z +m = m H +m (H )(W ) neutralino mass = chargino mass [GeV] ± ± ± ± ± - (Z )(W ) ( τν τ ) ~ + - ( l R, BF(l l )= ) ~ + - ( l L, BF(l l )=.5 ) ~ + - ( l L, BF(l l )= ) Henning Flaecher - SUSY 24 Manchester 8 23rd July 24

7 CMS searches for SUSY Slide from Henning Flaecher, lenary talk yesterday Caused by * an excess! h h + G ~ ) Br(! Z h + G ~ ) Br( m 2 - CMS Preliminary L = 9.5 fb s = 8 TeV = m± = m ; m ~ = GeV G Combined exclusion regions, all analyses Observed Exected ± σ ex. σ ex Higgsino mass m (GeV) CMS Preliminary 3l GMSB Higgsino bbll Higgsino mass m (GeV) ±2 - L = 9.5 fb s = 8 TeV bbbb lljj SUS-4-2 & arxiv: Most sensitive analysis LSP mass [GeV] ± roduction CMS Preliminary s = 8 TeV ICHEP 24 - SUS fb - SUS fb m ± = m m ± = m m ± Z +m = m H +m (H )(W ) neutralino mass = chargino mass [GeV] ± ± ± ± ± - (Z )(W ) ( τν τ ) ~ + - ( l R, BF(l l )= ) ~ + - ( l L, BF(l l )=.5 ) ~ + - ( l L, BF(l l )= ) Henning Flaecher - SUSY 24 Manchester 8 23rd July 24

8 CMS searches for SUSY Slide from Henning Flaecher, lenary talk yesterday Caused by * an excess In the search for 3 or more letons! h h + G ~ ) Br(! Z h + G ~ ) Br( m 2 - CMS Preliminary L = 9.5 fb s = 8 TeV = m± = m ; m ~ = GeV G Combined exclusion regions, all analyses Observed Exected ± σ ex. σ ex Higgsino mass m (GeV) CMS Preliminary 3l GMSB Higgsino bbll Higgsino mass m (GeV) ±2 - L = 9.5 fb s = 8 TeV bbbb lljj SUS-4-2 & arxiv: Most sensitive analysis LSP mass [GeV] ± roduction CMS Preliminary s = 8 TeV ICHEP 24 - SUS fb - SUS fb m ± = m m ± = m m ± Z +m = m H +m (H )(W ) neutralino mass = chargino mass [GeV] ± ± ± ± ± - (Z )(W ) ( τν τ ) ~ + - ( l R, BF(l l )= ) ~ + - ( l L, BF(l l )=.5 ) ~ + - ( l L, BF(l l )= ) Henning Flaecher - SUSY 24 Manchester 8 23rd July 24

9 CMS-SUS-3-2 searches for three or more letons In categories divided according to Number of letons (= electrons or muons) Oosite sign same flavor airs (OSSF) Number of hadronic taus Hadronic activity (= HT) Number of b-jets

10 [CMS-SUS-3-2]

11 CMS observes more events than exected 4 letons

12 CMS observes more events than exected 4 letons One off-z oosite sign same flavor air

13 CMS observes more events than exected 4 letons One hadronic tau One off-z oosite sign same flavor air

14 CMS observes more events than exected 4 letons One hadronic tau One off-z oosite Low hadronic activity sign same flavor air

15 CMS observes more events than exected No b-jets 4 letons One hadronic tau One off-z oosite Low hadronic activity sign same flavor air

16 CMS observes more events than exected.2 ± 2.4 events exected

17 CMS observes more events than exected 22 events observed.2 ± 2.4 events exected

18 CMS observes more events than exected 22 events observed.2 ± 2.4 events exected Close to discovery?

19 Excess in out of 64 categories... look elsewhere effect?

20 CMS: No real reason to be excited Slide from resentation by Andrea Gozzelino (CMS) at the conference SUSY 23, August 26

21 In which search does the excess occur? Can we exlain it with SUSY? Prosects

22 Simlified model Simlified model 2

23 Simlified model Simlified model 2 B l R = ẽ R, µ R τ R

24 Simlified model Simlified model 2 B B l R = ẽ R, µ R τ R τ R l R = ẽ R, µ R

25 Simlified model Simlified model 2 B B l R = ẽ R, µ R τ R τ R l R = ẽ R, µ R

26 Simlified model Simlified model 2 B B l R = ẽ R, µ R τ R τ R l R = ẽ R, µ R Common in GMSB

27 Simlified model Simlified model 2 B B l R = ẽ R, µ R τ R τ R l R = ẽ R, µ R Common in GMSB Realized when the soft masses for both Higgs fields receive extra, non-gauge mediated, contributions [Evans, Morrisey, Wells, Phys. Rev. D75, 557 (27) Grajek, Mariotti, Redigolo, JHEP 37 (23) 9]

28 Simlified model B Simlified model 2 B l R = ẽ R, µ R τ R τ R l R = ẽ R, µ R l + R l + τ ± τ τ R l R τ ± R τ ± l τ

29 Simlified model B Simlified model 2 B l R = ẽ R, µ R τ R τ R l R = ẽ R, µ R l + R l + τ ± τ τ R l R τ ± R τ ± l τ 2` +4 +MET

30 Simlified model B Simlified model 2 B l R = ẽ R, µ R τ R τ R l R = ẽ R, µ R l + τ ± τ + l ± l + R τ τ + R l τ R l R l R τ ± R τ ± τ R l ± R l ± l τ τ l 2` +4 +MET

31 Simlified model B Simlified model 2 B l R = ẽ R, µ R τ R τ R l R = ẽ R, µ R l + τ ± τ + l ± l + R τ τ + R l τ R l R l R τ ± R τ ± τ R l ± R l ± l τ τ l 2` +4 +MET 2 +4` +MET

32 Comare with the CMS results

33 Simulate the two rocesses at LHC 8 TeV l + τ + τ ± l ± l + R τ τ + R l τ R l R l R τ ± R τ ± τ R l ± R l ± l τ 2` +4 +MET τ l 2 +4` +MET FeynRules MG5_aMC [Alwall et all.] Pythia Tauola Delhes 2 MadAnalysis 5 [Conte,Fuks,Serret] [Alloul,Christensen,Degrande,Duhr,Fuks] [Sjöstrand,Mrenna,Skands] [Jadach,Was,Decker,Kuhn] [Ovyn,Rouby,Lemaitre]

34 Choose the mass ranges l + τ + τ ± l ± l + R τ τ + R l τ R l R l R τ ± R τ ± τ R l ± R l ± l τ 2` +4 +MET τ l 2 +4` +MET Mass

35 Choose the mass ranges l + τ + τ ± l ± l + R τ τ + R l τ R l R l R τ ± R τ ± τ R l ± R l ± l τ 2` +4 +MET τ l 2 +4` +MET Mass 5GeV 3GeV Sletons

36 Choose the mass ranges l + τ + τ ± l ± l + R τ τ + R l τ R l R l R τ ± R τ ± τ R l ± R l ± l τ 2` +4 +MET τ l 2 +4` +MET Mass ev 5GeV 3GeV Gravitino Sletons

37 Choose the mass ranges l + τ + τ ± l ± l + R τ τ + R l τ R l R l R τ ± R τ ± τ R l ± R l ± l τ 2` +4 +MET τ l 2 +4` +MET Mass ev 5GeV 3GeV 5GeV Gravitino Sletons Bino

38 3 Stau mass (GeV) 5 5 Sleton mass (GeV) 3

39 τ + l ± 3 τ + R l l R τ R l ± R l ± Stau mass (GeV) τ l 2 +4` +MET 2` +4 +MET l + R τ R l + τ ± τ l R τ ± R τ ± l τ 5 5 Sleton mass (GeV) 3

40 Obtain the exected number of events 3 Stau mass (GeV) 4 letons, τ h, OSSF, off-z, H T ex:.2 ± obs: 22 all E T bins ` +MET LHC < 2 GeV 2` +4 +MET Nev Number of events LEP 5 5 Sleton mass (GeV) 3

41 LHC m `R > 23 GeV [ATLAS-CONF-23-49] [CMS-PAS-SUS-3-6] 3 Stau mass (GeV) 4 letons, τ h, OSSF, off-z, H T ex:.2 ± obs: 22 all E T bins ` +MET LHC < 2 GeV 2` +4 +MET Nev Number of events LEP 5 5 Sleton mass (GeV) 3

42 LHC m R > 87 GeV [LEP] 3 Stau mass (GeV) 4 letons, τ h, OSSF, off-z, H T ex:.2 ± obs: 22 all E T bins ` +MET LHC < 2 GeV 2` +4 +MET Nev Number of events 5 5 Sleton mass (GeV) LEP LEP 3

43 LHC Preferred region: m `R 45 GeV, m R 9 GeV 3 Stau mass (GeV) 4 letons, τ h, OSSF, off-z, H T ex:.2 ± obs: 22 all E T bins ` +MET LHC < 2 GeV 2` +4 +MET Nev Number of events 5 5 Sleton mass (GeV) LEP LEP 3

44 What about the other categories? Categories with 3 letons are irrelevant since the background is too high And the others...

45 LHC Same category but on-z region... agrees with our best fit 3 Stau mass (GeV) 4 letons, τ h, OSSF, on-z, H T ex: 52. ± obs: 52 all E T bins. 2 +4` +MET LHC < 2 GeV 2` +4 +MET Nev Number of events LEP LEP 5 5 Sleton mass (GeV) 3

46 LHC Category without hadronic tau... agrees with our best fit 3 Stau mass (GeV) 4 letons, no τ h, OSSF, off-z, H ex:.7 ±.2 obs: 2 all E T bins T < 2 GeV 2 +4` +MET 2` +4 +MET LHC Nev Number of events 5 5 Sleton mass (GeV) LEP LEP 3

47 Other searches do not exclude our scenario CMS multi-leton search CMS SUS-3- (requires 4 electrons or muons) ATLAS multi-leton search ATLAS-CONF (requires MET> GeV) ATLAS di-tau+met search [arxiv:47.35] (leton veto)

48 In which search does the excess occur? Can we exlain it with SUSY? Prosects

49 We suggest to look for 2 hadronic taus + 2/3 letons l + τ ± 9.5fb fb l + R τ τ R l R τ ± R τ ± l τ m `R = 45 GeV m R = 9 GeV

50 In which search does the excess occur? Can we exlain it with SUSY? Prosects

51 In which search does the excess occur? CMS search for three or more letons Can we exlain it with SUSY? Prosects

52 In which search does the excess occur? CMS search for three or more letons Can we exlain it with SUSY? Yes we can! In Gauge Mediation Prosects

53 In which search does the excess occur? CMS search for three or more letons Can we exlain it with SUSY? Yes we can! In Gauge Mediation Prosects Ongoing udate with resect to new results

54

55 Branching ratio of the NNLSP M.I M.II 3 body decay oosite-charge m~ B = 5 GeV m~ lr = 5 GeV m~ G = ev 2 body decay same-charge m~ R [GeV] Branching ratio of the NNLSP M.I M.II m~ B = 5 GeV m~ lr = 5 GeV m~ G =. ev m~ R [GeV]

56 Requirements on the gravitino mass Not too high the NLSP decay should be romt m32 < ev Not too low 3 body decay NNLSP has to be dominant m_bino/msle =.? m_bino/msle = 2? m32 >.3 ev m32 >.5 ev

57 NLO+NLL [fb] s = 8 TeV l ~ R + l ~ R s = 3 TeV m~ lr [GeV]