Baryonic LHC

Transcription

1 Baryonic LHC Juri Smirnov Florence division INFN Many thanks to: Michael Dürr and Pavel Fileviez Perez arxiv:

2 Why is the Proton stable? SM accidental symmetry What about BSM? Can stability be understood more fundamentally? O 6+n = c 6+n(v B ) n 2+n (u R u R d R e R ) Ansatz: Baryon number as local symmetry for n=3 and c 9 1 ) > 10 4 TeV Spontaneously broken Low Scale Unification: Talk by Sebastian Ohmer Full Story: Talk by Michael Dürr JHEP 1108 (2011) 068 Pavel Fileviez Perez, Mark B. Wise

3 Matter and Gauge Symmetry BSM SU (3)c SU (2)L U (1)Y SU (3)c U (1)em U (1)B SM

4 Matter and Gauge Symmetry BSM SU (3)c SU (2)L U (1)Y SU (3)c U (1)em U (1)B SM

5 Matter and Gauge Symmetry BSM X + SU (3)c SU (2)L U (1)Y SU (3)c U (1)em SM X U (1)B NEW = 0 SM

6 Matter and Gauge Symmetry BSM X + SU (3)c SU (2)L U (1)Y SU (3)c U (1)em SM X U (1)B NEW = 0 SM

7 Matter and Gauge Symmetry BSM X + SU (3)c SU (2)L U (1)Y SU (3)c U (1)em SM X U (1)B NEW = 0 SM

8 Particle Content arxiv:

9 Particle Content arxiv:

10 Particle Content B 2 B 1 = 1 n f =1/3 arxiv:

11 Particle Content B 2 B 1 = 1 =1/3 n f Baryon Number forbids mixing with SM quarks This model could be potentially light arxiv:

12 New Higgs Scenario I 1 BR(hB) formhb =1TeV h B gg h B WW h B ZZ h B γγ h B Zγ h B t t h B h 1 h θ B

13 New Higgs Scenario II 1 BR(hB) formhb =1TeV h B gg h B WW h B ZZ h B γγ h B Zγ h B t t h B h 1 h θ B

14 New Higgs Scenario III 1 BR(hB) formhb =1TeV h B gg h B WW h B ZZ h B γγ h B Zγ h B t t h B h 1 h θ B

15 Assuming Baryonic Higgs is lighter than VLQs (pp! h B )= C gg sm hb (h B! gg). VV (pp! h B ) BR(h B! VV) C gg s 2 2 s M 2 h B n 2 f 9 3 v 2 B BR(h B! VV). V hb V

16 The precision channels: 2-Gamma σ(pp hb) BR(hB γγ) [fb] LHC γγ searches CMS 16.2fb 1 (13 TeV) fb 1 (8 TeV) ATLAS 15.4fb 1 (13 TeV) Scenario I: θ B =0 Scenario I: θ B =0.3 Scenario II: θ B =0 Scenario II: θ B =0.3 Scenario III: θ B =0 Scenario III: θ B =0.3 vb [GeV] Lower bound on v B from LHC γγ searches Scenario I: θ B =0,ATLAS Scenario I: θ B =0,CMS Scenario II: θ B =0,ATLAS Scenario II: θ B =0,CMS Scenario III: θ B =0,ATLAS Scenario III: θ B =0,CMS M hb >v B M hb [GeV] vb = 2 TeV mq = 1 TeV M hb [GeV] I) v B > 1 TeV II) v B > 2.3 TeV III) v B > 3 TeV

17 And Z-Gamma σ(pp hb) BR(hB Zγ) [fb] LHC Zγ searches CMS 12.9fb 1 (13 TeV) ATLAS 13.3fb 1 (13 TeV) Scenario I: θ B =0 Scenario I: θ B =0.3 Scenario II: θ B =0 Scenario II: θ B =0.3 Scenario III: θ B =0 Scenario III: θ B =0.3 vb [GeV] Lower bound on v B from LHC Zγ searches Scenario I: θ B =0,ATLAS Scenario I: θ B =0,CMS Scenario II: θ B =0,ATLAS Scenario II: θ B =0,CMS Scenario III: θ B =0,ATLAS Scenario III: θ B =0,CMS M hb [GeV] 10 2 M hb >v B M hb [GeV] vb = 2 TeV mq = 1 TeV

18 The precision channels: Model Independent BR(hB γγ) R =0.1, ATLAS R =0.1, CMS R =1,ATLAS R =1,CMS R =10,ATLAS R = M 2 h B /v 2 B =10,CMS M hb [GeV] BR(hB Zγ) R =0.1, ATLAS R =0.1, CMS R =1,ATLAS R =1,CMS R =10,ATLAS R = M 2 h B /v 2 B =10,CMS M hb [GeV]

19 At larger mixing: WW σ(pp hb) BR(hB WW) [pb] LHC WW searches ATLAS 13.2fb 1 (13 TeV) Scenario I: θ B =0 Scenario II: θ B =0 Scenario III: θ B =0 All scenarios: θ B =0.3 vb [GeV] Lower bound on v B from LHC WW searches M hb >v B Scenario I: θ B =0 Scenario II: θ B =0 Scenario III: θ B =0 All scenarios: θ B = M hb [GeV] vb = 2 TeV mq = 1 TeV M hb [GeV] I),II),III) vb > 2 TeV

20 Di-jet searches for the ZB 2 LHC dijet searches 10 5 Lower bound on v B from LHC dijet searches 1 gb vb [GeV] Combination from CMS 27 fb 1 &36fb 1 (13 TeV) ATLAS 37.0 fb 1 (13 TeV) ATLAS 3.4 fb 1 (13 TeV); Trigger-object Level Analysis M ZB [GeV] Combination from CMS 27 fb 1 &36fb 1 (13 TeV) ATLAS 37.0 fb 1 (13 TeV) ATLAS 3.4 fb 1 (13 TeV); Trigger-object Level Analysis M ZB [GeV] If MZB > 0.5 TeV vb > 3.4 TeV

21 Di-jet searches for the ZB 2 LHC dijet searches 10 5 Lower bound on v B from LHC dijet searches 1 But the ZB can hide! gb vb [GeV] Combination from CMS 27 fb 1 &36fb 1 (13 TeV) ATLAS 37.0 fb 1 (13 TeV) ATLAS 3.4 fb 1 (13 TeV); Trigger-object Level Analysis M ZB [GeV] Combination from CMS 27 fb 1 &36fb 1 (13 TeV) ATLAS 37.0 fb 1 (13 TeV) ATLAS 3.4 fb 1 (13 TeV); Trigger-object Level Analysis M ZB [GeV] If MZB > 0.5 TeV vb > 3.4 TeV

22 Alternative: VLQs are lighter than the Baryonic Higgs R R =(1, 1) 0 +(8, 1) 0 spin-0 resonance pseudo scalar, color singlet (! gg) = 8 3 d 2 s (M Q ) 2 R 1(0) 2 M 2 = 1 6 d 2 s (M Q ) s (M Q ) 2y Q v B 3 R = M 2 h B v 2 B 1 ) (! gg) (h B! gg)

23 The precision channels: Model Independent III) II) Photon Branching: BR(hB γγ) M R =0.1, ATLAS R =0.1, CMS R =1,ATLAS R =1,CMS R =10,ATLAS R = M 2 h B /v 2 B =10,CMS M hb [GeV] M I) Scenario I) 0.5 % Limit about 1.4 TeV vb > 700 GeV Scenario II) 8 % Limit about 2.2 TeV vb > 1.1 TeV Scenarion III) 20% Limit about 2.6 TeV vb > 1.3 TeV

24 The Model Space Heavy ZB : vb > 3.4 TeV

25 The Model Space Light ZB: Heavy ZB : vb > 3.4 TeV

26 The Model Space Light ZB: Large Scalar Mixing MHB < 2 MQ Heavy ZB : vb > 3.4 TeV

27 The Model Space Light ZB: MHB < 2 MQ Large Scalar Mixing vb > 2 TeV Heavy ZB : vb > 3.4 TeV

28 The Model Space Light ZB: MHB < 2 MQ Large Scalar Mixing Small Scalar Mixing vb > 2 TeV Heavy ZB : vb > 3.4 TeV

29 The Model Space Light ZB: MHB < 2 MQ Large Scalar Mixing Small Scalar Mixing vb > 2 TeV I) vb > 1.0 TeV II) vb > 2.3 TeV III) vb > 3.0 TeV Heavy ZB : vb > 3.4 TeV

30 The Model Space Light ZB: MHB < 2 MQ Large Scalar Mixing Small Scalar Mixing vb > 2 TeV I) vb > 1.0 TeV II) vb > 2.3 TeV III) vb > 3.0 TeV MHB > 2 MQ Heavy ZB : vb > 3.4 TeV

31 The Model Space Light ZB: MHB < 2 MQ MHB > 2 MQ Large Scalar Mixing Small Scalar Mixing vb > 2 TeV I) vb > 1.0 TeV II) vb > 2.3 TeV III) vb > 3.0 TeV I) vb > 0.7 TeV II) vb > 1.1 TeV III) vb > 1.3 TeV Heavy ZB : vb > 3.4 TeV

32 Summary We study a model class with local Baryon Number Theoretically motivated by proton stability New Higgs is unavoidable Baryonic Higgs search gives the strongest bounds in the nightmare scenario (gb << 1) Approach provides also bounds on new scalar meson resonances Discovery sets upper bound on symmetry breaking scale!

33 Thank you!

34 Stable Charged Particles