1. Title of talk1 On the Heterotic Road to the MSSM Stuart Raby Eotvos-Cornell 2007 Budapest, Hungary June 29, 2007

2. Phenomenology  charge quantizationcharge quantization  gauge coupling unification  Yukawa unification  neutrino masses

3. Title of talk3 Pati-Salam SU(4) C xSU(2) L xSU(2) R

4. 4 spinor repsn. of SO( 10 ) Charge quantization

5. Title of talk5 Phenomenology  charge quantization  gauge coupling unificationgauge coupling unification  Yukawa unification  neutrino masses

6. Title of talk6 Phenomenology  charge quantization  gauge coupling unification  Yukawa unificationYukawa unification  neutrino masses

7. Title of talk7 Phenomenology  charge quantization  gauge coupling unification  Yukawa unification  neutrino massesneutrino masses

8. Title of talk8 Phenomenology  charge quantization  gauge coupling unification  Yukawa unification  neutrino masses SO(10) SUSY GUT w/ L.E. SUSY

9. Title of talk9 4 D GUT problems GUT symmetry breaking Higgs doublet – triplet splitting Solution ? Orbifold GUTs

10. Orbifold SUSY GUTs in 5 or 6D  N=2  N=1 SUSY  chiral gauge theory  gauge symmetry breaking  Higgs doublet-triplet splitting All this first observed in heterotic string in 10D

11. Title of talk11 Outline  Orbifold GUTs / String Orbifolds Kobayashi, SR, Zhang hep-ph/0403065, hep-ph/0409098  Mini-Landscape I: search for MSSM Lebedev et al hep-th/0611095, hep-th/0611203 L-II : Approaching the MSSM Lebedev et al - in preparation

12. Title of talk12 Constructing MSSM from heterotic string/ Caveats SUSY solution at M S 100’s moduli ( geometric & more ) moduli stabilization & SUSY breaking ?? save for later gauge & Yukawa couplings fcns. of moduli tune to desired values

13. Title of talk13 E 8 x E 8 heterotic string in 10D Compactify 6D on (T 2 ) 3 Then mod by Z 6 -II = (Z 3 x Z 2 ) and Add Wilson lines Z 6 embedded in E 8 x E 8 gauge lattice as shift V 6 : consistent with mod. inv. !

14. Title of talk14 First consider (T 2 ) 3 /Z 3 + W 3 [Wilson line in SU 3 torus] Massless modes From Untwisted sector + (G 2, SU 3 ) twisted sector E 6 GUT in 5 or 6D

15. Title of talk15 Then add Z 2 orbifold + W 2 [in long direction] E6E6 SO(10)SU(4)xSU(2) L xSU(2) R F 3 = (4,2,1), F 3 c = (4 c,1,2), H = (1,2,2) PP’ ( V 2 )( V 2 + W 2 )

16. Title of talk16 T 1 twisted sector 2 Light fam’s Local GUT SO(10)

17. Title of talk17 T 1 twisted sector Vector-like exotics Can get large mass & decouple !!

18. Title of talk18 T 1 twisted sector Vector-like exotics ASIDE: Some EXOTICA do not affect GUT predictions !!

19. Title of talk19 S.R. & Wingerter 0705.0294 [hep-ph] baryon s mesons EXOTICA > 200 GeV

20. Title of talk20 exothermi c ~ 10 -5 sec ~ 10 -23 sec Only problem - searches for heavy hydrogen ?? Mesons  Baryons Easily produced at LHC

21. Title of talk21 Mini-Landscape search hep-th/0611095 Lebedev, Nilles, SR, Ramos-Sanchez, Ratz, Vaudrevange & Wingerter Search for MSSM Spectra in heterotic orbifolds

22. Title of talk22 Follow lead of Buchmuller, Hamaguchi, Lebedev & Ratz using same Z 6 -II orbifold hep-ph/0511035, hep-ph/0512326 Looked for and found SM gauge group in 4D with 3 families and vector-like exotics

23. Title of talk23 Mini-Landscape search Z 6 -II orbifold 1. V 6 breaks to SO(10) [or E(6)] 2. 2 families [ 16 [or 27] ] in T 1 twisted sect. 3. Generate 2 Wilson lines W 3, W 2 4. Identify ‘inequivalent’ models 5. Select models with 6. Select models with 3 net (3,2) 7. Select models with non-anom. 8. Select models with 3 SM families + Higgses + vector-like exotics

24. Title of talk24 Mini-Landscape search LNRRRVW

25. Title of talk25 Mini-Landscape search LNRRRVW 93 MSSM-like models or probability ~ 1/300 ‘Fertile’ patch in heterotic landscape !! w/ Arbitrary singlet VEVs

26. Title of talk26 GUTs or String Unification ? S.R. & Wingerter 0706:0217 [hep-th] New search - Remove restrictions  on SU(3)xSU(2) in SU(5) n hypercharge in SU(5) Now find

27. Title of talk27 ML: 1170 ML: 127

28. Title of talk28 Sin 2  90% in SU(5) Only ~ 10% w/ Sin 2  1220 models

29. Title of talk29 ML-II : Approaching the MSSM LNRRRVW – in preparation 1. Check R parity 2. Check for D = 0 directions 3. Check all exotics get large mass 4. Check light Higgs 5. Check charged fermion masses 6. Check neutrino masses 7. Check dimension 5 B & L violating ops.

30. Title of talk30 Generalized R parity Forbid Dim 2 & 3 operators Family Reflection symmetry or Matter parity

31. Title of talk31 Construct model w/ Generalized R parity Identify “suitable” B-L  standard for SM particles  vector-like on exotics  maximal no. SM singlets w/

32. Title of talk32 Results

33. Title of talk33 Results

34. Title of talk34 Consider One Model G = SU(3)xSU(2)x [SU(4)xSU(2)’]xU(1) 9 1. Spectrum 2.  term 3. Yukawa couplings 4. Neutrino masses 5. Dim. 5 ops.

35. Title of talk35 OOrbifold GUT - SU(6) LLocal GUT - SO(10) x SO(4)

36. Title of talk36 Spectrum

37. Title of talk37  term  ~ M Z Yukawa couplings Not realistic - YET

38. Title of talk38 Neutrino masses via See-Saw YES !! Dimension 5 operators – suppressed ~

39. Title of talk39 Conclusions We find MSSM in ‘fertile patch’ of E(8)xE(8) heterotic string Important to test string theory SUSY breaking and lifting flat directions ?? Almost realistic theory !!! w/ Caveat MSSM Orbifold & Local GUT

40. Title of talk40