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2HDMs for “4G”: From high intensity to high energy to the cosmos

2HDMs for “4G”: From high intensity to high energy to the cosmos. Amarjit Soni HET, BNL ( adlersoni@gmail.com ) SCALARS 2011, Warsaw. Motivation [1]. Seen 3; why not 4? Enhanced prospects for DEWSB [ Holdom (‘86); Bardeen et al (’90); Hung & Isidori (‘97); Hung & Xiong (‘11)]…………

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2HDMs for “4G”: From high intensity to high energy to the cosmos

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  1. 2HDMs for “4G”: From high intensity to high energy to the cosmos AmarjitSoni HET, BNL (adlersoni@gmail.com) SCALARS 2011, Warsaw SCALARS'11; WARSAW A.SONI

  2. Motivation [1] • Seen 3; why not 4? • Enhanced prospects for DEWSB • [Holdom(‘86); Bardeen et al (’90); Hung & Isidori(‘97); Hung & Xiong(‘11)]………… • Enhanced prospects for baryogenesis [Jarlskog & Stora(’88); Branco et al(‘98); Hou(‘08)] SCALARS'11; WARSAW A.SONI

  3. Motivation [II] NFC: built in…..a very serious problem for almost all BSMs • Cannot be just simple SM4: DM link? [See e.g. Volovik(‘03); Lee, Liu & AS (‘11)] • Readily accounts for B-CP-anomalies [A.S et al (’08; ’10); Buras et al (‘10)] • Accounts also for AFB(tt) [Davoudiasl,McElmurry & A S] SCALARS'11; WARSAW A.SONI

  4. May be the best reason • My license plate: udcstbgz (since ‘89 NY) • Used to be OSCILL8 (before ‘89 in CA) SCALARS'11; WARSAW A.SONI

  5. “SM4”: a revisit • potential of B-physics forSM4 studied extensively with George Hou~86-88 • Inspired by classic works on “SSB w/o fundamental scalars” by Cornwall and Norton [‘73], studied with Norton and students Carpenter & Siegemund-Broka, role of heavy quarks in DEWSB in [87-90] SCALARS'11; WARSAW A.SONI

  6. SCALARS'11; WARSAW A.SONI

  7. CAN NOT BE JUST SM4 • Neutrino4 must be very heavy [LEP, Fermilab] • D0,CDF mt’, mb’ > 350GeV [bounds in SM4] • 4G fermions very likely play important role IN DEWSB -> likely a strongly coupled 4G • Generic 2HDMmodels [see Bar-Shalom, Nandi and A. S ‘11] suggest significant differences in search strategies from SM4 and constraints of oblique parameters SCALARS'11; WARSAW A.SONI

  8. HINTS of CKM breaking Based on Enrico Lunghi+AS 0707.0212; 0803.4340; 0903.5059;0912.0002 1010.6069 SCALARS'11; WARSAW A.SONI

  9. Delta K pi SCALARS'11; WARSAW A.SONI

  10. Important to Examine only DeltaF=2 observables:Leave out Vub sin 2 β = 0.87+-.09{Lunghi+AS,hep-ph/08034340} ( became possible only due significantly reduced error in BK) Antonio et al (RBC-UKQCD) 0702042 Gamiz et al; Becirevic; Tantalo . 2.1-2.7 σ- deviation from the directly measured values of sin 2 β requires careful follow-up SCALARS'11; WARSAW A.SONI

  11. Predict sin2β & fB SCALARS'11; WARSAW A.SONI

  12. SCALARS'11; WARSAW A.SONI

  13. SCALARS'11; WARSAW A.SONI

  14. SCALARS'11; WARSAW A.SONI

  15. HUGE STRIDES IN LATTICE CALCULATION OF BK! Mawhinney, plenary LAT’11 SCALARS'11; WARSAW A.SONI

  16. In a nutshell • Bulk of NP effects is in Bd,Bs mixing & in sin2β {CONFIRMS our 2008 findings} • Bulk of NP NOT in B->τν, or in εK [Presence of subdominant effects therein certainly possible] • Many, many checks for robustness of the conclusions • VERY DIFFICULT to RECONCILE RESULTS with CKM-SM SCALARS'11; WARSAW A.SONI

  17. Overall perspective • Sin 2 β from “penguin” dominated modes (ΦKS ,ηKS, …..) tends to be even smaller than from “gold-plated” mode • ΔACP (K π) = ACP (K+π0) - ACP (K+π-) is nowhere near zero (~14.4%) and rather difficult to understand. . Also CDF, D0: S(ψΦ) & LHCb mild indication….unsettled . D0, dimuon asymmetry exptal analysis extremely difficult -> NEEDS confirmation Implications of our analysis is that such nonSM effects requiring the presence of NP with a new CP-odd phase should persist SCALARS'11; WARSAW A.SONI

  18. Taking the anomalies seriously • The most interesting theoretical framework to address these is in fact warped extra dimension……Fermion geography/localization provides a unique construct to simultaneously address EW-planck and flavor hierachies ..Agashe,Perez & AS’04; Buras et al ‘08; Neubert et al’08 • 4G is the simplest way to address these • The two may well be linked via duality SCALARS'11; WARSAW A.SONI

  19. 4G & BCP-anomalies A.S. et al ‘10; Nandi & A.S’10; Buras et al’10; Hou & Ma’10 SCALARS'11; WARSAW A.SONI

  20. S et al 0807.1971; 1002.0595 {Note constraints from S,T, b -> s gamma, • K-> pi nu nu ….are all included} • C ALSO A.Buras et al 1002.2126 SCALARS'11; WARSAW A.SONI

  21. Predicted range of S(psiKs) in SM4 (with mt’=400 GeV) is (shown in red) compared with the experimentally measured value via the psi Ks mode (1 sigma error) and with the SM (1 sigma) World Average SM4 seems to predict sin2 beta around 0.70 with an error of about 0.06; S. Nandi and A.S, 1011.6091 SCALARS'11; WARSAW A.SONI

  22. Recent D0 result is vertical axis and combined D0, CDF each For SM4 error on Delta_Gamma_s is increased by a factor of two resulting in ~50% increase in a_sl^s S.Nandi and A.S,1011.6091 SCALARS'11; WARSAW A.SONI

  23. SCALARS'11; WARSAW A.SONI

  24. Br(Bs->µµ): a very clean process IMPORTANT Correlation with S(psi phi) LHC EPS’11 <9.0X10-9 SM4 may increase or decrease Br by ~ O(3) SCALARS'11; WARSAW A.SONI

  25. Detection of 4G [SM4] quarks[Atwood, Gupta, AS’11] • An important feature: To a rather good approximation, pair production is near threshold . Using this feature showed robust signals: • Single lepton • Opposite sign leptons 3) Same sign dileptons All 3 viable SCALARS'11; WARSAW A.SONI

  26. Search for 4th generation at hadron colliders SCALARS'11; WARSAW A.SONI

  27. An important caveat: • B-CP anomalies only need a heavy top-like quark, possessing akin to charged weak interactions: the underlying theory need not be simple SM4 SCALARS'11; WARSAW A.SONI

  28. 4G2HDM:LEET for DEWSB[Bar-Shalom,Nandi, A.S ‘11] • 2 Higgs doublet model for the 4th ; 2nd doublet with v2/v1 >> 1 couples only to 4th gen • FCNC only among 3rd and 4th gen • Significant modifications to t’, b’ decays • t’->t h, b h+ very large BR, similarly for b’ • Requires modification to search strategies • Can account for tt FB asymmetry SCALARS'11; WARSAW A.SONI

  29. FCNC effects only in t’  t & b’ b transitions • e.g., • Enhanced ht’tYukawa interaction Phenomenology of type-I 4G2HDM b->s , Z-> bb, oblique corrections …….etc See Bar-Shalom, Nandi, AS,arXiv:1105.6095 SCALARS'11; WARSAW A.SONI

  30. t’ decay pattern t’ decays: SCALARS'11; WARSAW A.SONI

  31. b’ decay pattern b’ decays: Bar-Shalom SCALARS'11; WARSAW A.SONI

  32. Top pair FB asymmetry from strongly coupled 4G quarks • [Davoudiasl, McElmurry and AS arXiv:1108.1173] • CDF has been reporting ~2 sigma deviation from SM in the integrated asymm. And in the high invariant top pair mass about 3.5 sigma deviation from SM: • 0.158 +- 0.075 vs 0.058+-0.009 • For high (>450 GeV), 0.475+-0.114 vs 0.088+-0.013 • NEW (EPS’11) D0 finds similar integrated asymmetery (a bit more significant than CDF); in the high mass region they see some increase but not so pronounced SCALARS'11; WARSAW A.SONI

  33. We consider a simple toy 4G model with [FC] scalars SCALARS'11; WARSAW A.SONI

  34. SCALARS'11; WARSAW A.SONI

  35. SCALARS'11; WARSAW A.SONI

  36. Baryogenesis • For SM3, there is unique CP invariance [Jarlskog ‘87] SCALARS'11; WARSAW A.SONI

  37. In 4G models SCALARS'11; WARSAW A.SONI

  38. DM possibilities in 4G models • Lee,Liu, AS arXiv: 1105.3490 • Link heaviness of 4 with new abelian gauge interaction: B – 4 L4 distinguishing it from SM3 neutrinos • Just a heavy 4 in SM4 is NOT a viable DMcandidate …conflicts with direct detection bounds[CDMS & XENON} both for Dirac (spin independent) or Majorana (spin dependent) cases [XENON 10] SCALARS'11; WARSAW A.SONI

  39. New B-xiL gauge symmetry for 4G • [its similar to earlier 3G studies: Ma arXiv:9709.474; Lee & Ma, 1001.0768] • Relevant effective new interaction is: SCALARS'11; WARSAW A.SONI

  40. SCALARS'11; WARSAW A.SONI

  41. SCALARS'11; WARSAW A.SONI

  42. Summary & Outlook • 4G extensions of SM3 should be seriously considered • It is highly unlikely to be just SM4 • Heavier 4G quarks can trigger DEWSB and consequently can be a simpler solution to hierarchy problem w/o the need for multitude of new parameters • It facilitates significantly baryogenesis over SM3 • Unlike almost all BSM models, 4G extension need not cause flavor or CP problem • Simple solution to B-CP anomalies • AFB (tt) may be a hint of a strongly coupled 4G • Experimental searches for t’ -> t h, b’->t h+- should be given a high priority [in addition to conventional modes] SCALARS'11; WARSAW A.SONI

  43. Xtras SCALARS'11; WARSAW A.SONI

  44. SCALARS'11; WARSAW A.SONI

  45. SCALARS'11; WARSAW A.SONI

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  47. SCALARS'11; WARSAW A.SONI

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