How to tell apart non-standard EWSB mechanisms. Veronica Sanz CERN and YORK Moriond 2012

Transcription

1 How to tell apart non-standard EWSB mechanisms Veronica Sanz CERN and YORK Moriond 2012

2 In this talk What is standard? EWSB by elementary scalar(s) includes SM and SUSY What is non-standard? EWSB by -composite scalar - no scalar at all includes Little Higgs, Extra-Dimensions and Technicolor

3 Composite Scalar - Motivation What if there is a Higgs? Light scalar Need stabilization mechanism (or we have no clue about QFT) Symmetries Fermionic SUSY Bosonic Goldstone since SUSY may not be there to save the day Higgs as a PGB like the pion of QCD composite Higgs

4 Composite Scalar - Realizations Composite Higgs is realized in Little Higgs, Extra-Dimensions and Technicolor symmetry PGB -Little Higgs, TC: new 4D symmetry -Extra-dimensions: SM 5D gauge= 4D gauge+gb

5 Composite Scalar-Generic features scalar resonance WW unitarization non-sm scalar: deviations ξ = v2 f 2 degree of fine-tuning Giudice, Grojean, Pomarol and Rattazzi ʻ07 Theory study TeV for ξ> 0.2 4πf f composite Higgs already unitarize WW ξ 0 SM-like v generic features are too SM-like

6 Composite Scalar-Common features s=1 ex. Z, ρ TC, Z KK not crucial for WW scattering

7 Composite Scalar-Common features s=1 ex. Z, ρ TC, Z KK not crucial for WW scattering new gauge symms?

8 Composite Scalar-Common features s=1 ex. Z, ρ TC, Z KK not crucial for WW scattering new gauge symms? s=2 ex. G KK, f TC 2 Extra-Dimensions and TC-type see next

9 Composite Scalar-Common features s=1 ex. Z, ρ TC, Z KK not crucial for WW scattering new gauge symms? s=2 ex. G KK, f TC 2 Extra-Dimensions and TC-type see next s=1/2 ex. T, Q KK, techni-baryons New heavy quarks mix with SM quarks

10 Composite Scalar-Common features s=1 ex. Z, ρ TC, Z KK not crucial for WW scattering new gauge symms? s=2 ex. G KK, f TC 2 Extra-Dimensions and TC-type see next s=1/2 ex. T, Q KK, techni-baryons New heavy quarks mix with SM quarks 3rd gen light quarks

11 Composite Scalar-Common features s=1 ex. Z, ρ TC, Z KK not crucial for WW scattering new gauge symms? s=2 ex. G KK, f TC 2 Extra-Dimensions and TC-type see next s=1/2 ex. T, Q KK, techni-baryons New heavy quarks mix with SM quarks 3rd gen light quarks 4th gen? see next

12 How to tell apart a graviton from an impostor? Guimaraes, Fok, Lewis, VS in preparation i.e. massive spin-2 resonance = smoking gun of extra-dimensions?

13 How to tell apart a graviton from an impostor? Guimaraes, Fok, Lewis, VS in preparation i.e. massive spin-2 resonance = smoking gun of extra-dimensions? G KK-graviton Ĝ TC-type impostor

14 How to tell apart a graviton from an impostor? Guimaraes, Fok, Lewis, VS in preparation i.e. massive spin-2 resonance = smoking gun of extra-dimensions? G KK-graviton Ĝ TC-type impostor propagation

15 How to tell apart a graviton from an impostor? Guimaraes, Fok, Lewis, VS in preparation i.e. massive spin-2 resonance = smoking gun of extra-dimensions? G KK-graviton Ĝ TC-type impostor propagation Pauli-Fierz Pauli-Fierz

16 How to tell apart a graviton from an impostor? Guimaraes, Fok, Lewis, VS in preparation i.e. massive spin-2 resonance = smoking gun of extra-dimensions? G KK-graviton Ĝ TC-type impostor propagation Pauli-Fierz Pauli-Fierz interactions

17 How to tell apart a graviton from an impostor? Guimaraes, Fok, Lewis, VS in preparation i.e. massive spin-2 resonance = smoking gun of extra-dimensions? G KK-graviton Ĝ TC-type impostor propagation Pauli-Fierz Pauli-Fierz interactions c i M G µνt µν i,sm

18 How to tell apart a graviton from an impostor? Guimaraes, Fok, Lewis, VS in preparation i.e. massive spin-2 resonance = smoking gun of extra-dimensions? G KK-graviton Ĝ TC-type impostor propagation Pauli-Fierz Pauli-Fierz interactions c i M G µνt µν i,sm c i overlap G with fields i and M TeV

19 How to tell apart a graviton from an impostor? Guimaraes, Fok, Lewis, VS in preparation i.e. massive spin-2 resonance = smoking gun of extra-dimensions? G KK-graviton Ĝ TC-type impostor propagation Pauli-Fierz Pauli-Fierz c i? interactions i,sm M G µνt µν c i overlap G with fields i and M TeV

20 How to tell apart a graviton from an impostor? Guimaraes, Fok, Lewis, VS in preparation Ĝ couplings?

21 How to tell apart a graviton from an impostor? Guimaraes, Fok, Lewis, VS Ĝ couplings? in preparation Lorentz and gauge no dimension-4

22 How to tell apart a graviton from an impostor? Guimaraes, Fok, Lewis, VS Ĝ couplings? in preparation Lorentz and gauge flavor and CP invariant no dimension-4 dimension-5 same as in T µν

23 How to tell apart a graviton from an impostor? Guimaraes, Fok, Lewis, VS Ĝ couplings? in preparation Lorentz and gauge flavor and CP invariant no dimension-4 dimension-5 same as in T µν Ĝ couples like G same spin determination How do we distinguish them?

24 How to tell apart a graviton from an impostor? Guimaraes, Fok, Lewis, VS R g/γ = Br( gg) Br( γγ) = 8c2 g c 2 γ in preparation In any extra-dimension of the type ds 2 = w(z) 2 (η µν dx µ dx ν dz 2 ) example UED,RS G : R g/γ =8 Ĝ can produce any other ratio

25 How to tell apart 1st generation RH or LH compositeness? Composite baryons and elementary quarks mix Martin and VS JHEP (2010) Redi,VS, Weiler in preparation L mixing = λ u L,R u L,R Ū L +(u d) y λ L λ R

26 How to tell apart 1st generation RH or LH compositeness? Composite baryons and elementary quarks mix Martin and VS JHEP (2010) Redi,VS, Weiler in preparation L mixing = λ u L,R u L,R Ū L +(u d) y λ L λ R 1st generation compositeness! Flavor?

27 How to tell apart 1st generation RH or LH compositeness? Composite baryons and elementary quarks mix Martin and VS JHEP (2010) Redi,VS, Weiler in preparation L mixing = λ u L,R u L,R Ū L +(u d) y λ L λ R 1st generation compositeness! Flavor? MFV if composite sector flavor invariant Left-handed compositeness: λ Lu Id, λ Ld Id λ Ru y u, λ Rd y d Right-handed compositeness: λ Lu y u, λ Ru Id, λ Ld y d λ Rd Id Redi, Weiler 11

28 How to tell apart 1st generation RH or LH compositeness? Composite baryons and elementary quarks mix Martin and VS JHEP (2010) Redi,VS, Weiler in preparation L mixing = λ u L,R u L,R Ū L +(u d) y λ L λ R 1st generation compositeness! Flavor? MFV if composite sector flavor invariant Redi, Weiler 11 MFV half of the proton could be composite

29 How to tell apart 1st generation RH or LH compositeness? Signature: single production heavy quark q Q ρ LH compositeness RH compositeness W,Z Q Q q

30 How to tell apart 1st generation RH or LH LH compositeness compositeness? Martin and VS JHEP (2010) W,Z Q q

31 How to tell apart 1st generation RH or LH LH compositeness compositeness? Martin and VS JHEP (2010) Q W,Z ATLAS-PH-EP Lepton channel w/ 1 ifb. q EW production

32 How to tell apart 1st generation RH or LH compositeness? RH compositeness Looking at current bounds and discovery prospects Redi,VS, Weiler in preparation Q BGs: multijet, W+jets, Z+jets, top pair and single top ATLAS-PH-EP Rejection: exclude dijet near W or Z and veto b-tagging, cut on leading jet QCD generated with ALPGEN -> PYTHIA signal xsecs mq=1 TeV, mg=2 TeV Log 10 (σ(fb)) 4 3 m G = 2 TeV 2 m G = 3 TeV 1 m G = 4 TeV m Q (GeV )

33 How to tell apart 1st generation RH or LH compositeness? RH compositeness Redi,VS, Weiler in preparation We use two methods: deltar and leading jet optimized for high-low mq -1 Number of Events for 10 fb QCD Signal m 3j (GeV)

34 No Scalar-Generic features Realized in warped extra-dimensions and TC-type s=1 resonances do unitarize WW scattering THE problem: S parameter solutions do not abound Non-calculable, ignore TCSM Eichten, Lane Phys. Lett. B 89 Mechanisms to cancel, warped models Cured Higgsless (s=1)-(s=1/2) cancellation Holographic TC s=1 cancellation Cacciapaglia et al Phys. Rev. D 05 Hirn,VS Phys. Rev. Lett. 06

35 How to tell apart scenarios of dynamical EWSB? In dileptons... Banerjee, Martin and VS JHEP (2012) 1. Invariant mass TCSM HTC CHL 3 10 CHL Arbitary Units (GeV) m + - l l Arbitary Units Z KK (GeV) m + - l l Z2 KK MG> PYTHIA> ATLFAST and TeV

36 How to tell apart scenarios of dynamical EWSB? 2. Charge asymmetry A charge = N( η > 0) N( η < 0) N( η > 0) + N( η < 0) Banerjee, Martin and VS JHEP (2012) η = η l + η l eta asym is a good measure of chirality can tell V,A admixture Vector (R=L) Non-vector (R=(1/3)L) ( ) 2 A V A 2 + V Chiral (R=0) Arbitary Units ! l + -! l - "# $%&# A after simulation

37 Conclusions Non-standard EWSB ideas abound and have a very rich phenomenology. May not be easy to discover by just looking at scalar EWSB sector. Need correlations with other signals. Tell apart Extra-Dimensions from TC-type: gravitons and its impostor Tell apart 1st gen RH or LH compositeness in multijets Tell apart different scenarios of DEWSB in dileptons

38 Operators

39 ratio to gluons gluon-jet from quark-jet? 1. most models: G coupling to light quarks suppressed 2. Angular correlations dσ (q q G) = d cos θ 1 + ( ) c2 θ 1 4s 2 θ to fermions = 1 c 4 θ to gluons, 3. Tag light jet using Galliccio-Schwartz techniques