Higgs and Electroweak Physics

Transcription

1 Higgs and Electroweak Physics [theory summary] Southampton University & Rutherford Appleton LAB WIN2015 June 12, 2015, MPIK Heidelberg 1

2 Present: impressive success of LHC RUN 1 on the Higgs&EW Physics measurements! 2

3 Karl Jakobs' talk 3

4 Present: no deviations from SM... 4

5 Higgs Boson Discovery has completed the puzzle of the Standard model... 5

6 But it has raised even more questions than the number of answers it has given! 6

7 But it has raised even more questions than the number of answers it has given! The Nature of Higgs Boson? 7

8 But it has raised even more questions than the number of answers it has given! The Nature of Higgs Boson? Fine-tuning problem 8

9 But it has raised even more questions than the number of answers it has given! The Nature of Higgs Boson? Fine-tuning problem Dark Matter problem 9

10 But it has raised even more questions than the number of answers it has given! The Nature of Higgs Boson? Fine-tuning problem Dark Matter problem Connection to GUT & couplings unification 10

11 But it has raised even more questions than the number of answers it has given! The Nature of Higgs Boson? The origin of matter/anti-matter asymmetry Fine-tuning problem Dark Matter problem Connection to GUT & couplings unification 11

12 Higgs boson properties are consistent with main compelling BSM theories, so the pattern we have is just a piece of a much bigger puzzle! The Nature of Higgs Boson? The origin of matter/anti-matter asymmetry Fine-tuning problem Dark Matter problem Connection to GUT & couplings unification 12

13 Beyond the Higgs discovery Higgs properties are amazingly consistent with all main compelling underlying theories (except higgsless ones!) Some parameter space of BSM theories was eventually excluded. CPNSH workshop CERN

14 Beyond the Higgs discovery Higgs properties are amazingly consistent with all main compelling underlying theories (except higgsless ones!) Some parameter space of BSM theories was eventually excluded. Present Status 14

15 Beyond the Higgs discovery Higgs properties are amazingly consistent with all main compelling underlying theories (except higgsless ones!) Some parameter space of BSM theories was eventually excluded. Models with Higgs boson fundamental scalar Goldstone boson regular Higgs SUSY UED composite scalar ADD Little Twin CHM Higgs Higgs RS Technicolour 15

16 What do we know about BSM? 16

17 What do we know about BSM? It does exist! 17

18 What do we know about BSM? It does exist! And Higgs & EW sector is the perfect (may be the best) place to probe it! [see also Alex Pomarol's talk] 18

19 What do we know about BSM? It does exist! And Higgs & EW sector is the perfect (may be the best) place to probe it! [see also Alex Pomarol's talk] Higgs production cross sections, coupling determination, modelindependent analysis (higher-dimensional operators) Higgs width New Higgs Decays Longitudinal Vector Boson scattering (VLVL ), unitarity considerations, new vector and scalar resonances New states decaying into Higgs SUSY, TC, CHM Dark Matter Connections Higgs and/or EW bosons portals Connection to inflation Neutrino Physics Flavour Physics... 19

20 Higgs&EW group at WIN talks, great TH<->EXP dialog, new results! 20

21 Higgs Couplings measurements/analysis 21

22 EWPTs and Higgs+TGC constraints on dim-6 operators Juan González Fraile Tevong You 22

23 The role of the change of kinematics Juan González Fraile Tevong You cw fw Some operators affect not only the Higgs signal rate but also differential distributions. Taking it into account could significantly increase sensitivity to a new physics! 23

24 EWPTs and Higgs+TGC constraints on dim-6 operators taking into account kinematics Tevong You Juan González Fraile for ci=1 LHC probes ~ TeV scale range of Λ with Higgs+TGC couplings Taking it into account kinematics does increase sensitivity! 24

25 Indirect constraints on stops and validity of EFT Tevong You Drozd, Ellis,Quevillon,You'15 below 500 GeV, the EFT breaks down; above 500 GeV EFT provides description with the accuracy better than 10% 25

26 Vector Boson Fusion (VBF) and multi-boson Production 26

27 VBF sensitivity to Higgs and new physics VBF is more model-independent Marc Thomas VS 27

28 VBF sensitivity to Higgs and new physics VBF is more model-independent Marc Thomas VS VBF is sensitive to the lack of cancellation in VLVL scattering amplitude a x hvv SM 28

29 VBF sensitivity to Higgs and new physics Marc Thomas VBF is more model-independent VS VBF is sensitive to the lack of cancellation in VLVL scattering amplitude for ghvv deviation from SMthe cross section faster increases with energy for larger numbers of final state particles a x hvv SM 29

30 VBF sensitivity to Higgs and new physics Marc Thomas VBF is more model-independent VS VBF is sensitive to the lack of cancellation in VLVL scattering amplitude for ghvv deviation from SMthe cross section faster increases with energy for larger numbers of final state particles a x hvv SM 30

31 VBF at proton-proton level Marc Thomas WLWL->WLWL enhancement is hidden under the large transverse polution WW->hhh enhancement is impressive, but rates are too low for the LHC To measure ghvv from WLWL->WLWL one needs suppress WT contribution 31

32 Results on the VBF sensitivity Marc Thomas cuts reduce transversely polarised background and make measurement of HVV coupling from VBF viable, providing model-independent way of measuring of HVV coupling 32

33 Connection to Composite Higgs and Technicolor models 33

34 Is Technicolor really dead? Mads Frandsen 34

35 Is Technicolor really dead? If title contains question, then the answer is...mads Frandsen NO! 35

36 Mads Frandsen 36

37 Mads Frandsen 37

38 Mads Frandsen 38

39 Mads Frandsen 39

40 TC Higgs Higgs as Techni-scalar can be dynamicall light! Frandsen, Sannino, Foadi (2012) κ 40

41 TC Higgs vs data Belyaev, Brown, Foadi,Frandsen (2012) 41

42 TC Phenomenology Belyaev,Frandsen,Foadi, Jarvinen, Sannino 2008 Hapola, Sannino 11 Resonances couples to TC Higgs Resonances couples to W,Z The search for di-boson signatures is important! Setting limits on the TC scale will strongly constrain the lower limit on TC-Higgs mass 42

43 Higgs in SUSY models 43

44 SUSY reinterpretation of LHC Higgs results Sven Heinemeyer 44

45 SUSY reinterpretation of LHC Higgs results Sven Heinemeyer 45

46 SUSY reinterpretation of LHC Higgs results Sven Heinemeyer 46

47 Fully Covering the MSSM Higgs Sector at the LHC Jeremie Quevillon Higgs mass should be used as input! Higgs sector is defined effectively at tree-level by tan(β) and MA! 47

48 Fully Covering the MSSM Higgs Sector at the LHC Jeremie Quevillon 48

49 Fully Covering the MSSM Higgs Sector at the LHC Jeremie Quevillon Note: decays to SUSY particles are absent here! 49

50 Chances for SUSY-GUT in the LHC Epoch Marco Chianese SU(5) framework 50

51 Chances for SUSY-GUT in the LHC Epoch Marco Chianese The limit is based on naturalness of λ principles! 51

52 NMSSM Higgs signatures from stop decays Dilip Ghosh 52

53 NMSSM Higgs signatures from stop decays Dilip Ghosh Higgs-jet ID efficiency can be high in the high-pt Higgs region, so Higgs-jet can be generically used for BSM hunting! 53

54 Higgs connection to Cosmoogy: Dark Matter, Baryogenesis and Inflation 54

55 Higgs-Dark Matter Connection and the Scale of New Physics Michael Scherer 55

56 Higgs-Dark Matter Connection and the Scale of New Physics Michael Scherer 56

57 Minimal SU(N) Vector Dark Matter Stefano Di Chiara 57

58 Stefano Di Chiara H1/H2 mixing 58

59 The model can be probed and potentially completely excluded at the TeV! Stefano Di Chiara Matthias Mozer 59

60 THE SM VACUUM AND HIGGS INFLATION Javier Rubio Interaction with gravity introduc Higher dimensional operators Which change running of λ 60

61 THE SM VACUUM AND HIGGS INFLATION Javier Rubio 61

62 THE SM VACUUM AND HIGGS INFLATION Javier Rubio 62

63 Discovering a second Higgs doublet via A0 -> ZH0 and connection to EW baryogenesis Gláuber Carvalho Dorsch very hard in MSSM, but possible in 2HDM 63

64 Discovering a second Higgs doublet via A0 -> ZH0 and connection to EW baryogenesis Gláuber Carvalho Dorsch very hard in MSSM, but possible in 2HDM 64

65 Gláuber Carvalho Dorsch 65

66 Gláuber Carvalho Dorsch Requires sizable MA-MH mass split 66

67 Gláuber Carvalho Dorsch 67

68 LHC sensitivity to Higgs width 68

69 Higgs width and coupling constraints from the high-mass H V V process Nikolas Kauer Higgs SM BG interference is the key point also in talk by for the sensitivity to the Higgs width! Juan González Fraile 69

70 Higgs width and coupling constraints from the high-mass H V V process Nikolas Kauer Bounds are model-dependent! 70

71 Higgs boson is opening door to comprehensive test of underlying theory of Nature! UED SUSY ADD Little Higgs Technicolour Twin Higgs CHM RS 71

72 The main problem is to decode an underlying theory from the complicated set of signatures: down -> top SUSY UED ADD Little Twin CHM Higgs Higgs top->down Easy RS down->top Very difficult Tons of Signatures 72

73 The main problem is to decode an underlying theory from the complicated set of signatures: down -> top SUSY UED ADD Little Twin CHM Higgs Higgs top->down Easy RS down->top Very difficult Tons of Signatures 73

74 THANK YOU! To all organizers and particular to Manfred for fantastic workshop and weather (especially at the excursion!) To all speakers for very inspiring talks! Thanks to everybody! 74