Motivation: Strongly-coupled Dark Sectors near the Weak Scale

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4 Motivation: Strongly-coupled Dark Sectors near the Weak Scale Dark sectors that contain a new, strongly-coupled, confining force near the weak scale are well-motivated from a wide variety of perspectives: Theories with strongly-coupled composite dark matter, e.g., Dark baryons ( Stealth Dark Matter ) Dark mesons (Ectocolor DM; heavy chiral DM; etc.) SIMP mechanism (3->2 thermal freezeout via WZW) Theories that explain electroweak symmetry breaking, e.g., Bosonic technicolor / induced EWSB Composite Higgs theories Relaxion with new (non-qcd) dark sector Theories that provide interesting / novel LHC phenomena, e.g., Hidden valleys Quirky theories and signals Vectorlike confinement For this talk focus is on LHC phenomena.

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7 dark 4 f M f < 4 f

8 0, a B, W a B B µ F µ d + W W µ F µ 0 d Two types! U(1)-like ( 0 only) SU(2)-like ±,0 g (0 ) p Ndark 4

9 g d d d f abc ( a d) µ b dd µ c d g d d d 4 p Ndark

10 q q g (0 ) p Ndark 4 g d d d 4 p Ndark m > 2m

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16 phys G phys = 1 c c 1 G y u QHu c + y d QH d c c 0 y t t t + y b b b + y c + y t t b + y (D µ H) D µ H µ 0 Z µ h µ + W µ h ± ; 0 ± ; 0 f f h W ± ; Z

17 q f ± ; 0 q f ±,0! H ±,A 0

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20 G ±,0! ±,0 yfhf F i 1 ij H j F 2 H + h.c.

21 MFF 0 + h.c. yfhf 0 + h.c. SM below EWSB SM above EWSB SU(3) c U(1) em SU(3)c SU(2) L U(1) em

22 f f (0 ) G ±,0! ±,0 t, +,... t, b, b,,... t, b,... GB h y f c

23 W ± h, Zh W ± h, Zh ± ; 0 h W ± ; Z GB h gc GB h gc m2 h m 2 K

24 ± ; 0 h W ± ; Z ±,0! H ±,0 3 ±,0! H ±,A 0 GB h gs H GB h g cos( ) g m2 h m 2 H

25 It makes a difference Gaugephilic GK, Martin, Ostdiek, Tong to appear Gaugephobic GK, Martin, Ostdiek, Tong to appear GK, Martin, Ostdiek, Tong to appear GK, Martin, Ostdiek, Tong to appear

26 It makes a difference Gaugephilic Dark pion decay to f-fbar GK, Martin, Ostdiek, Tong appear largely toindifferent when m(π) < m(gb) + m(h) Gaugephobic GK, Martin, Ostdiek, Tong to appear GK, Martin, Ostdiek, Tong to appear GK, Martin, Ostdiek, Tong to appear

27 It makes a difference Gaugephilic GK, Martin, Ostdiek, Tong to appear Gaugephobic GK, Martin, Ostdiek, Tong to appear Qualitative differences above W+h/Z+h threshold GK, Martin, Ostdiek, Tong to appear GK, Martin, Ostdiek, Tong to appear

28 m d < (m t + m b ) When + q q d + d d One can recast new physics searches involving final state tau s, e.g. EW ATLAS: Suggests charged dark pions less than about GeV are ruled out.

29 q q!! +! W + hw h q q!! ± 0! W ± hzh q q!! ± 0! t bzh q q!! ± 0! t b + q q!! ± 0! t bb b q q!! +! t b tb q q!! ± 0! t bt t

30 EUROPEAN ORGANISATION FOR NUCLEAR RESEARCH (CERN) JHEP 09 (2017) 084 CERN-EP th October 2017 Search for supersymmetry in final states with two same-sign or three leptons and jets using 36 fb 1 of p s = 13 TeV pp collision data with the ATLAS detector The ATLAS Collaboration Signal region N signal leptons N b-jets N jets p jet T E miss T m e E miss T /m e Other [GeV] [GeV] [GeV] Rpc2L2bS 2SS 2 6 > 25 > 200 > 600 > 0.25 Rpc2L2bH 2SS 2 6 > 25 > 1800 > 0.15 Rpc2Lsoft1b 2SS 1 6 > 25 > 100 > ,10 <p`1 T,p`2 T < 100 GeV Rpc2Lsoft2b 2SS 2 6 > 25 > 200 > 600 > ,10 <p`1 T,p`2 T < 100 GeV Rpc2L0bS 2SS = 0 6 > 25 > 150 > 0.25 Rpc2L0bH 2SS = 0 6 > 40 > 250 > 900 Rpc3L0bS 3 = 0 4 > 40 > 200 > 600 Rpc3L0bH 3 = 0 4 > 40 > 200 > 1600 Rpc3L1bS > 40 > 200 > 600 Rpc3L1bH > 40 > 200 > 1600 Rpc2L1bS 2SS 1 6 > 25 > 150 > 600 > 0.25 Rpc2L1bH 2SS 1 6 > 25 > 250 > 0.2 Rpc3LSS1b `±`±`± 1 veto 81<m e ± e ±<101 GeV Rpv2L1bH 2SS 1 6 > 50 > 2200 Rpv2L0b = 2SS = 0 6 > 40 > 1800 veto 81<m e ± e ±<101 GeV Rpv2L2bH 2SS 2 6 > 40 > 2000 veto 81<m e ± e ±<101 GeV Rpv2L2bS ` ` 2 3 > 50 > 1200 Rpv2L1bS ` ` 1 4 > 50 > 1200 Rpv2L1bM ` ` 1 4 > 50 > 1800

31 Thus far, we have found: Strong constraints on pp! d! `+` when m d m d > 0.5 Weak constraints on pp! d! d d m d m d =0.25 m d m d =0.45 m d m d =0.55 Dark Pion Mass [GeV] Dark Pion Mass [GeV] Dark Pion Mass [GeV]

32 2 2 = = = c + 2 c (3, 3) = = 1 + 3

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35 q q g (0 ) p Ndark 4 g d d d 4 p Ndark q ` q `+ g (0 ) p Ndark 4 g (0 ) p Ndark 4