Exotic Signals in Twin Higgs models. Yuhsin Tsai. University of Maryland BLV2017, 05/16/2017 H125

Transcription

1 Exotic Signals in Twin Higgs models Yuhsin Tsai University of Maryland BLV2017, 05/16/2017 H125

2 Twin Higgs model Chacko, Goh, Harnik 05 A solution to the little hierarchy problem without colored partners t B Twin-top SU(3)B x SU(2)B h A h A h B t A m 2 h (y2 t ŷ 2 t )

3 SM y t SU(3) x SU(2) gauge couplings Twin yˆt SU(3) x SU(2) gauge couplings EWSB scale v ' EWSB scale f Other Yuakwa couplings U(1)Y coupling Other Yuakwa couplings U(1)Y coupling

4 Exotic-fermions: carry both SM/Twin charges Cheng, Jung, Salvioni, YT (15 ) e.g. for the UV symmetry SU(6) x SU(4) y t H A H B Q ta t B SM SU(3)c Twin SU(3)c Q SM SU(2) q A q B Twin SU(2) q A qb Appear in most of the non-susy Twin Higgs UV-completion

5 Ideally: Z2 symmetric Twin y t SU(3) x SU(2) gauge couplings yˆt SU(3) x SU(2) gauge couplings EWSB scale v EWSB scale f Other Yuakwa couplings U(1)Y coupling Other Yuakwa couplings U(1)Y coupling

6 Ideally: Z2 symmetric Twin y t SU(3) x SU(2) gauge couplings yˆt SU(3) x SU(2) gauge couplings large Higgs mixing, violate Higgs coupling measurement EWSB scale v Other Yuakwa couplings light twin-particles violate EWSB scale N eff f constraint Other Yuakwa couplings U(1)Y coupling U(1)Y coupling

7 Almost Z2 + asymmetric reheating y t SU(3) x SU(2) gauge couplings yˆt SU(3) x SU(2) gauge couplings EWSB scale v < f>3v EWSB scale f Other Yuakwa couplings Other Yuakwa couplings U(1)Y coupling Chacko, Craig, Fox, Harnik (16 ) Craig, Koren, Trott (16 ) Dilute N eff U(1)Y coupling using asymmetric reheating

8 Signals of the almost Z2 symmetric TH Higgs decay into twin-hadrons (meson, baryon, glueball) ˆ h ˆb ˆ ˆb ˆp ± Ĝ 0 ++ Exotic-quarks decay into SM + Twin q A Z t q A t

9 Twin particles become MET at colliders Invisible Higgs decay Br < 10% ˆ ˆ h ˆb ˆb ˆ ˆp ± Ĝ 0 ++ ˆ ˆ ˆp ± Decay into MET (twin-photons, ) t Stop search applies ˆM A > 1 TeV q A q A Z MET t

10 But still, we get a twin-universe to explore! Dark matter Cold DM + Twin-baryon, which oscillates as SM BAO P r 0 Twin + DR / P r 0 CDM + DR Suppression of the Large Scale Structure ΔN eff 0.4 r Ω Twin-baryon Ω DM preliminary k eq k ( h Mpc -1 ) r 2% r 5% r 1% σ 8 non-linear Chacko, Curtin, Geller, YT, in preparation

11 Less Z2: Fraternal Twin Higgs model y t SU(3) x SU(2) gauge couplings yˆt SU(3) x SU(2) gauge couplings EWSB scale v < f>3v EWSB scale f Other Yuakwa couplings ˆb, Only keep ˆ, ˆ U(1)Y coupling Heavy Twin-photon

12 Displaced jet signal in Fraternal TH Scalar glueballs can be the lightest twin hadron Ĝ 0 ++ Craig, Katz, Strassler, Sundrum (15 ) h ˆb b Curtin, Verhaaren (15 ) Chacko, Curtin, Verhaaren (15 ) ˆb b displaced decay into jets displaced decay via the Higgs portal Lifetime ~ mm to km distance

13 Displaced lepton signal in Fraternal TH When twin-b mesons are the lightest hadrons µ + h ˆb ˆb ˆ b q A,B µ Cheng, Jung, Salvioni, YT (15 ) Vector meson decays via Twin/SM photon mixing

14 Displaced lepton signal in Fraternal TH Search of a displaced muon pair 2 ct Ù > 30 cm D m A` H100 GeVL 2 e 1 0 meta-stable p-scalar 13 TeV 300 fb -1 8 TeV Log -1 ct Ù < 0.1 mm: h Æ prompt? CMS-EXO m Dashed contours : different number of light meson states Cheng, Jung, Salvioni, YT (15 )

15 Probing the UV structure: LHC Cheng, Jung, Salvioni, YT (15 ) DV into bb or muons + lepton (pt > 100) t q A Z q A t Different curves in the same style: different assumptions of g-ball multiplcities

16 When having a lighter generation of twin-qurks DV search of < 10 GeV twin-hadron is challenging at ATLAS/CMS h SM ˆb ˆ ˆ! µ + q A,B µ ˆb ˆ! µ + µ c ˆ! ' 20 cm m 4 B GeV 100 GeV ˆ

17 LHCb is good at light & long-lived particle search Displaced muon search at LHCb Run 3 h! Nˆ! ˆ! + Nˆ ˆ ˆ!! µ + µ hnˆ! i/hnˆ i 3 BR(h b b ) BR(ω μ + μ - )[%] mˆ! 4GeV mˆ! 8GeV Twin Higgs yˆb y b hnˆ! i 4 h! ˆb ˆb! light twin-hadrons f/v 4 hnˆ! i 8 hnˆ! i 4 hnˆ! i LHCb 15/fb, 95% C.L Proper Decay Length [m] Pierce, Shakya, YT, Zhao, in prepartion

18 Exotic-fermion carrying twin-color SM SU(3)c Twin SU(3)c Q SM SU(2) q A q B Twin SU(2) q A qb

19 Resenonce search of exotic-bound state Need a larger Z2 breaking for sub-tev exotic-fermion q B K 0,

20 Displaced signal from a resonance decay Need a larger Z2 breaking for sub-tev exotic-fermion Li, Salvioni, YT, Zheng, in prepartion 1600 DVê Mon olep limit for TH model 1400 m Exo-fermion decay or >10% Tuning DV Limit H300fb -1 L MonoLep H13.3 fb -1 L MonoLep H300fb -1 L m 0

21 Different pheno from the Naturalness problem Little hierarchy problem SM-like hidden sector (Twin) Collider experiments Displaced signals Light LLP at LHCb Stop-like signature Invisible Higgs decay Cosmology Large scale structure Small scale structure Asymmetric-DM WIMP-DM Cosmic-ray signal

22 Backup Slides

23 Light Higgs from a Z2 protection H fundamental under global SU(4) spontaneously hhi B0 0A f explicitly break into SU(3), produce 7 NGB Radiative Correction (H A,H B ) gauge into SU(2)sm x SU(2)twin 1 uneaten GSB, SM Higgs 2 g 2 AH A H A + g 2 BH B H B Need SM charged partner fields to cancel the divergence

24 Twin Higgs as a solution to little hierarchy H fundamental under global SU(4) spontaneously hhi B0 0A f explicitly break into SU(3), produce 7 NGB With a Z2 symmetry (H A,H B ) gauge into SU(2)sm x SU(2)twin 1 uneaten GSB, SM Higgs 2 g 2 H A H A + H B H B we can ``fake the SU(4), no quadratic divergence

25 Exotic-fermions & exotic-gauge bosons

26 Displaced muon search at LHCb We adopt cuts from the displaced A analysis P. Ilten, Y. Soreq, J. Thaler, M. Williams, W. Xue, (µ ± ) 2 [2, 5], p(µ ± ) > 10 GeV, p T (µ ± ) > 0.5 GeV Muon id efficiency 2 µ 0.50 (! v ) 2 [2, 5], p T (! v ) > 1 GeV `T 2 [6 mm, 22 mm] q Z 0 q v! v v µ + µ q q v! v! v µ + µ