Exotic W + W Z Signals at the LHC

Transcription

1 Exotic W + W Z Signals at the LHC Jared Evans jaevans@ucdavis.edu w/ M.Luty and S.Chang Department of Physics University of California - Davis WCLHC Evans (UCD) WWZ at LHC April 14, / 11

2 Premise Purpose of talk: Evans (UCD) WWZ at LHC April 14, 011 / 11

3 Premise Purpose of talk: Show how to find TWO Higgs bosons in the early LHC Evans (UCD) WWZ at LHC April 14, 011 / 11

4 Premise Purpose of talk: Show how to find TWO Higgs bosons in the early LHC HDM = Simplified Model for spin-0 resonances Evans (UCD) WWZ at LHC April 14, 011 / 11

5 Premise Purpose of talk: Show how to find TWO Higgs bosons in the early LHC HDM = Simplified Model for spin-0 resonances Higgs heavier Higgs sector more strongly coupled Handle on signals of Strong EWSB! Evans (UCD) WWZ at LHC April 14, 011 / 11

6 Premise Purpose of talk: Show how to find TWO Higgs bosons in the early LHC HDM = Simplified Model for spin-0 resonances Higgs heavier Higgs sector more strongly coupled Handle on signals of Strong EWSB! Topology of interest? Z t A 0 h 0 W W + Evans (UCD) WWZ at LHC April 14, 011 / 11

7 Fermion Masses in Strong EWSB Fermion masses in Strong EWSB by (ΨΨ c ) H SM L c ( v ) d 1 Λ d 1 Q (ΨΨc ) t c c Qt c = m top Qt c Λ t Evans (UCD) WWZ at LHC April 14, / 11

8 Fermion Masses in Strong EWSB Fermion masses in Strong EWSB by (ΨΨ c ) H SM L c ( v ) d 1 Λ d 1 Q (ΨΨc ) t c c Qt c = m top Qt c Λ t (ΨΨ c ) v d +... Evans (UCD) WWZ at LHC April 14, / 11

9 Fermion Masses in Strong EWSB Fermion masses in Strong EWSB by (ΨΨ c ) H SM L c ( v ) d 1 Λ d 1 Q (ΨΨc ) t c c Qt c = m top Qt c Λ t (ΨΨ c ) v d +... Discrete Symmetries (ΨΨ c ) decomposes I P i = Evans (UCD) WWZ at LHC April 14, / 11

10 Fermion Masses in Strong EWSB Fermion masses in Strong EWSB by (ΨΨ c ) H SM L c ( v ) d 1 Λ d 1 Q (ΨΨc ) t c c Qt c = m top Qt c Λ t (ΨΨ c ) v d +... Discrete Symmetries (ΨΨ c ) decomposes I P i = new BSM spin-0 resonances produced through GGF... a lot like a HDM Evans (UCD) WWZ at LHC April 14, / 11

11 Fermion Masses in Strong EWSB Fermion masses in Strong EWSB by (ΨΨ c ) H SM L c ( v ) d 1 Λ d 1 Q (ΨΨc ) t c c Qt c = m top Qt c Λ t (ΨΨ c ) v d +... Discrete Symmetries (ΨΨ c ) decomposes I P i = new BSM spin-0 resonances produced through GGF... a lot like a HDM HDM can mimic low-lying strong scalars Evans (UCD) WWZ at LHC April 14, / 11

12 Fermion Masses in Strong EWSB Fermion masses in Strong EWSB by (ΨΨ c ) H SM L c ( v ) d 1 Λ d 1 Q (ΨΨc ) t c c Qt c = m top Qt c Λ t (ΨΨ c ) v d +... Discrete Symmetries (ΨΨ c ) decomposes I P i = new BSM spin-0 resonances produced through GGF... a lot like a HDM HDM can mimic low-lying strong scalars Electroweak Precision Data? Evans (UCD) WWZ at LHC April 14, / 11

13 Two Higgs Doublet Model: Introduction V = m1 Φ 1 Φ 1 + m Φ Φ + λ ( ) 1 Φ 4 1 Φ λ ( ) 1 + Φ 4 Φ ) ( ) ( ) ( ) + λ 3 (Φ 1 Φ 1 Φ Φ + λ 4 Φ 1 Φ + h.c. + λ5 Φ 1 Φ ( ) ([ ] ) m1 Φ 1 Φ + h.c. + λ 6 Φ 1 Φ 1 + λ 7 Φ Φ Φ 1 Φ + h.c. Evans (UCD) WWZ at LHC April 14, / 11

14 Two Higgs Doublet Model: Introduction V = m1 Φ 1 Φ 1 + m Φ Φ + λ ( ) 1 Φ 4 1 Φ λ ( ) 1 + Φ 4 Φ ) ( ) ( ) ( ) + λ 3 (Φ 1 Φ 1 Φ Φ + λ 4 Φ 1 Φ + h.c. + λ5 Φ 1 Φ ( ) ([ ] ) m1 Φ 1 Φ + h.c. + λ 6 Φ 1 Φ 1 + λ 7 Φ Φ Φ 1 Φ + h.c. Force SU() L SU() R ( ρ 1) Evans (UCD) WWZ at LHC April 14, / 11

15 Two Higgs Doublet Model: Introduction V = m1 Φ 1 Φ 1 + m Φ Φ + λ ( ) 1 Φ 4 1 Φ λ ( ) 1 + Φ 4 Φ ) ( ) ( ) + λ 3 (Φ 1 Φ 1 Φ Φ + λ 4 Φ 1 Φ ( ) + h.c. + λ5 Φ 1 Φ ( ) ([ ] ) m1 Φ 1 Φ + h.c. + λ 6 Φ 1 Φ 1 + λ 7 Φ Φ Φ 1 Φ + h.c. Force SU() L SU() R ( ρ 1) Evans (UCD) WWZ at LHC April 14, / 11

16 Two Higgs Doublet Model: Introduction V = m1 Φ 1 Φ 1 + m Φ Φ + λ ( ) 1 Φ 4 1 Φ λ ( ) 1 + Φ 4 Φ ) ( ) ( ) + λ 3 (Φ 1 Φ 1 Φ Φ + λ 4 Φ 1 Φ ( ) + h.c. + λ5 Φ 1 Φ ( ) ([ ] ) m1 Φ 1 Φ + h.c. + λ 6 Φ 1 Φ 1 + λ 7 Φ Φ Φ 1 Φ + h.c. Force SU() L SU() R ( ρ 1) m1, and λ 1,,3,4 v, m h, m H, m A and angles α and β Evans (UCD) WWZ at LHC April 14, / 11

17 Two Higgs Doublet Model: Introduction V = m1 Φ 1 Φ 1 + m Φ Φ + λ ( ) 1 Φ 4 1 Φ λ ( ) 1 + Φ 4 Φ ) ( ) ( ) + λ 3 (Φ 1 Φ 1 Φ Φ + λ 4 Φ 1 Φ ( ) + h.c. + λ5 Φ 1 Φ ( ) ([ ] ) m1 Φ 1 Φ + h.c. + λ 6 Φ 1 Φ 1 + λ 7 Φ Φ Φ 1 Φ + h.c. Force SU() L SU() R ( ρ 1) m1, and λ 1,,3,4 v, m h, m H, m A and angles α and β H +, H and A SU() C triplet Same mass Evans (UCD) WWZ at LHC April 14, / 11

18 Two Higgs Doublet Model: Introduction V = m1 Φ 1 Φ 1 + m Φ Φ + λ ( ) 1 Φ 4 1 Φ λ ( ) 1 + Φ 4 Φ ) ( ) ( ) + λ 3 (Φ 1 Φ 1 Φ Φ + λ 4 Φ 1 Φ ( ) + h.c. + λ5 Φ 1 Φ ( ) ([ ] ) m1 Φ 1 Φ + h.c. + λ 6 Φ 1 Φ 1 + λ 7 Φ Φ Φ 1 Φ + h.c. Force SU() L SU() R ( ρ 1) m1, and λ 1,,3,4 v, m h, m H, m A and angles α and β H +, H and A SU() C triplet Same mass (b-quark neglected; HDM Type I or Type II) Evans (UCD) WWZ at LHC April 14, / 11

19 Two Higgs Doublet Model: Final States Resonances: h 0, H 0 and A = ( A + A 0 A ) (Note: A / WW, ZZ by CP and h 0 h SM ) Evans (UCD) WWZ at LHC April 14, / 11

20 Two Higgs Doublet Model: Final States Resonances: h 0, H 0 and A = ( A + A 0 A ) (Note: A / WW, ZZ by CP and h 0 h SM ) New resonances can be composite or elementary particles Evans (UCD) WWZ at LHC April 14, / 11

21 Two Higgs Doublet Model: Final States Resonances: h 0, H 0 and A = ( A + A 0 A ) (Note: A / WW, ZZ by CP and h 0 h SM ) New resonances can be composite or elementary particles Final States: LOTS of these! W + W ZZ t t t t H 0 b b/τ + τ A 0 b b/τ + τ A 0 Z /W A ± W + W Z W + W h 0 h 0 Z /H 0 Z h 0 h 0 h 0 W + W ZZ t t b b/τ + τ A 0 Z /A ± W New states massive gauge bosons, heavy quarks and each other! Evans (UCD) WWZ at LHC April 14, / 11

22 Two Higgs Doublet Model: Final States Resonances: h 0, H 0 and A = ( A + A 0 A ) (Note: A / WW, ZZ by CP and h 0 h SM ) New resonances can be composite or elementary particles Final States: LOTS of these! W + W ZZ t t t t H 0 b b/τ + τ A 0 b b/τ + τ A 0 Z /W A ± W + W Z W + W h 0 h 0 Z /H 0 Z h 0 h 0 W + W ZZ h 0 t t b b/τ + τ A 0 Z /A ± W New states massive gauge bosons, heavy quarks and each other! Signals not being looked for! Evans (UCD) WWZ at LHC April 14, / 11

23 Higgs at Early LHC Signals for Early LHC? m A < m t m A > m h + m Z m h > m W Evans (UCD) WWZ at LHC April 14, / 11

24 Higgs at Early LHC Signals for Early LHC? m A < m t m A > m h + m Z W + W Z at 7 TeV LHC m h > m W Evans (UCD) WWZ at LHC April 14, / 11

25 Higgs at Early LHC Signals for Early LHC? m A < m t m A > m h + m Z W + W Z at 7 TeV LHC m h > m W m A = 330 GeV m h = 00 GeV m H = 1 TeV sin α = 1 tan β = 1 Evans (UCD) WWZ at LHC April 14, / 11

26 Higgs at Early LHC Signals for Early LHC? m A < m t m A > m h + m Z W + W Z at 7 TeV LHC m h > m W m A = 330 GeV m h = 00 GeV m H = 1 TeV sin α = 1 tan β = 1 t A 0 h 0 Z W σ(pp A 0 ).6 pb BR(A 0 h 0 Z ) 0.9 BR(h 0 W + W ) 0.74 W + σ(pp WWZ ) 1.75 pb Evans (UCD) WWZ at LHC April 14, / 11

27 Early LHC Signal: 4 leptons + E/ T Backgrounds: WWZ +jets, t tz +jets and WZ +jets Evans (UCD) WWZ at LHC April 14, / 11

28 Early LHC Signal: 4 leptons + E/ T Backgrounds: WWZ +jets, t tz +jets and WZ +jets Cut Signal Background 4 Leptons.0 fb fb Cuts: Need > 4e/µ with η e <.4, η µ <.1, p t,eµ > 8 GeV either one e with p t,e > 0 GeV or µ with p t,µ > 15 GeV Evans (UCD) WWZ at LHC April 14, / 11

29 Early LHC Signal: 4 leptons + E/ T Backgrounds: WWZ +jets, t tz +jets and WZ +jets Cut Signal Background 4 Leptons.0 fb fb Cuts: Need > 4e/µ with η e <.4, η µ <.1, p t,eµ > 8 GeV either one e with p t,e > 0 GeV or µ with p t,µ > 15 GeV Simple Search!!! 3 fb 1 of data, 6-7 signal events to no background Evans (UCD) WWZ at LHC April 14, / 11

30 Early LHC Signal: 3 leptons + jets: Cuts Process C1 C C3 C4 C5 C6 Z + jets?????????????????? WZ + jets t tz + jets WWZ + jets Wt t+ jets Total Signal All cross-sections in units of fb C1: 3e/µ (η e <.4, η µ <.1, p t,l > 8 GeV) jets (η j <.5, p t,j > 30 GeV) either one e with p t,e > 0 GeV or µ with p t,µ > 15 GeV C: E/ T > 0 GeV C3: Reconstruct leptonic Z ( m ll m Z < 7 GeV) C4: Force hardest remaining lepton +E/ T to make W ( solutions) C5: Reconstruct hadronic W ( m jj m W < 5 GeV) C6: m WWZ < m top Evans (UCD) WWZ at LHC April 14, / 11

31 Early LHC Signal: 3 leptons + jets: Cuts Process C1 C C3 C4 C5 C6 Z + jets?????????????????? WZ + jets t tz + jets WWZ + jets Wt t+ jets Total Signal All cross-sections in units of fb C1: 3e/µ (η e <.4, η µ <.1, p t,l > 8 GeV) jets (η j <.5, p t,j > 30 GeV) either one e with p t,e > 0 GeV or µ with p t,µ > 15 GeV C: E/ T > 0 GeV C3: Reconstruct leptonic Z ( m ll m Z < 7 GeV) C4: Force hardest remaining lepton +E/ T to make W ( solutions) C5: Reconstruct hadronic W ( m jj m W < 5 GeV) C6: m WWZ < m top Z + jets: C1 10 3, C 10, C3, C4 1, C5 10 1, C Evans (UCD) WWZ at LHC April 14, / 11

32 Early LHC Signal: 3 leptons + jets: Results -1 ) -1 ) # of events (3 fb.5.5 # of Events (3 fb (GeV) M WWZ M WW (GeV) M WW (GeV) M WWZ (GeV) 15 signal to background at 5 fb 1 very promising! Evans (UCD) WWZ at LHC April 14, / 11

33 Early LHC Signal: 3 leptons + jets: Results -1 ) -1 ) # of events (3 fb.5.5 # of Events (3 fb (GeV) M WWZ M WW (GeV) M WW (GeV) M WWZ (GeV) 15 signal to background at 5 fb 1 very promising! Possibly TWO Higgs bosons at early LHC!!! Evans (UCD) WWZ at LHC April 14, / 11

34 Early LHC Signal: 3 leptons + jets: Results -1 ) -1 ) # of events (3 fb.5.5 # of Events (3 fb (GeV) M WWZ M WW (GeV) M WW (GeV) M WWZ (GeV) 15 signal to background at 5 fb 1 very promising! Possibly TWO Higgs bosons at early LHC!!! Needs a full experimental analysis! Evans (UCD) WWZ at LHC April 14, / 11

35 Other Interesting Signals gg A 0 Zh 0 Zb b (enhanced signal for boosted Higgs) Evans (UCD) WWZ at LHC April 14, / 11

36 Other Interesting Signals gg A 0 Zh 0 Zb b (enhanced signal for boosted Higgs) gg/w + W h 0 /H 0 ZA 0 Zt t/zb b gg/w + W h 0 /H 0 W A + W t b Evans (UCD) WWZ at LHC April 14, / 11

37 Other Interesting Signals gg A 0 Zh 0 Zb b (enhanced signal for boosted Higgs) gg/w + W h 0 /H 0 ZA 0 Zt t/zb b gg/w + W h 0 /H 0 W A + W t b gg/w + W H 0 h 0 h 0 Evans (UCD) WWZ at LHC April 14, / 11

38 Other Interesting Signals gg A 0 Zh 0 Zb b (enhanced signal for boosted Higgs) gg/w + W h 0 /H 0 ZA 0 Zt t/zb b gg/w + W h 0 /H 0 W A + W t b gg/w + W H 0 h 0 h 0 gg/w + W H 0 ZA 0 ZZh 0 ZZb b gg/w + W H 0 W + A W + W h 0 W + W W + W Evans (UCD) WWZ at LHC April 14, / 11

39 Other Interesting Signals gg A 0 Zh 0 Zb b (enhanced signal for boosted Higgs) gg/w + W h 0 /H 0 ZA 0 Zt t/zb b gg/w + W h 0 /H 0 W A + W t b gg/w + W H 0 h 0 h 0 gg/w + W H 0 ZA 0 ZZh 0 ZZb b gg/w + W H 0 W + A W + W h 0 W + W W + W... Evans (UCD) WWZ at LHC April 14, / 11

40 Conclusion HDM yields interesting BSM signals observable at the LHC Evans (UCD) WWZ at LHC April 14, / 11

41 Conclusion HDM yields interesting BSM signals observable at the LHC HDM = simplified model for strong(er) EWSB Evans (UCD) WWZ at LHC April 14, / 11

42 Conclusion HDM yields interesting BSM signals observable at the LHC HDM = simplified model for strong(er) EWSB Evidence or discovery of two Higgs bosons in early LHC data Evans (UCD) WWZ at LHC April 14, / 11

43 Conclusion HDM yields interesting BSM signals observable at the LHC HDM = simplified model for strong(er) EWSB Evidence or discovery of two Higgs bosons in early LHC data Masses can be reconstructed! Evans (UCD) WWZ at LHC April 14, / 11

44 Conclusion HDM yields interesting BSM signals observable at the LHC HDM = simplified model for strong(er) EWSB Evidence or discovery of two Higgs bosons in early LHC data Masses can be reconstructed! Other exciting signals exist to be explored! Evans (UCD) WWZ at LHC April 14, / 11