1. Factorization Breaking in Diffraction  pp,  p and  *p  Konstantin Goulianos The Rockefeller University

2. LISHEP 2009, Brazil, Jan 19-24 DIFFRACTIVE AND EXCLUSIVE PRODUCTION AT CDF II K. GOULIANOS 2 Contents  pp and pp results   p and  *p results  discussion

3. LISHEP 2009, Brazil, Jan 19-24 DIFFRACTIVE AND EXCLUSIVE PRODUCTION AT CDF II K. GOULIANOS 3 pp and pp results

4. LISHEP 2009, Brazil, Jan 19-24 DIFFRACTIVE AND EXCLUSIVE PRODUCTION AT CDF II K. GOULIANOS 4  T SD (pp & pp) - Soft Diffraction Factor of ~10 (~5) suppression observed at √s = 1800 (540) GeV Standard Regge Suppression relative to prediction from Regge factorization KG, PLB 358, 379 (1995)

5. LISHEP 2009, Brazil, Jan 19-24 DIFFRACTIVE AND EXCLUSIVE PRODUCTION AT CDF II K. GOULIANOS 5 Diffractive Structure Function CDF H1 momentum fraction of parton in Pomeron Using preliminary pdf’s from same suppression as in soft diffraction H1 2006 fits: more flat! factor ~10 suppression pp vs.  *p - Breakdown of QCD factorization

6. LISHEP 2009, Brazil, Jan 19-24 DIFFRACTIVE AND EXCLUSIVE PRODUCTION AT CDF II K. GOULIANOS 6 Diffractive Structure Function: x Bj and Q 2 dependence E T jet ~ 100 GeV ! Small Q 2 dependence in region 100 < Q 2 < 10,000 GeV 2  Pomeron evolves as the proton!

7. LISHEP 2009, Brazil, Jan 19-24 DIFFRACTIVE AND EXCLUSIVE PRODUCTION AT CDF II K. GOULIANOS 7 Diffractive Structure Function: t- dependence  No diffraction dips  No Q2 dependence in slope from inclusive to Q 2 ~10 4 GeV 2 Fit d  /dt to a double exponential:  Same slope over entire region of 0 < Q 2 < 4,500 GeV 2 across soft and hard diffraction!

8. LISHEP 2009, Brazil, Jan 19-24 DIFFRACTIVE AND EXCLUSIVE PRODUCTION AT CDF II K. GOULIANOS 8  p and  *p

9. LISHEP 2009, Brazil, Jan 19-24 DIFFRACTIVE AND EXCLUSIVE PRODUCTION AT CDF II K. GOULIANOS 9 Vector meson production (Pierre Marage, HERA-LHC 2008)  left -suppression of 20-50 % at high W  right -suppression of low |t| events at high Q 2  smaller slope!

10. LISHEP 2009, Brazil, Jan 19-24 DIFFRACTIVE AND EXCLUSIVE PRODUCTION AT CDF II K. GOULIANOS 10 Unexpected, not understood Hadron-like  QCD factorisation not OK Dijets in  p at HERA - 2007 [slide from summary of the HERA/LHC Workshop of March 14, 2007]

11. LISHEP 2009, Brazil, Jan 19-24 DIFFRACTIVE AND EXCLUSIVE PRODUCTION AT CDF II K. GOULIANOS 11 Dijets in  p at HERA - 2008 DIS 2008 talk by W. Slomiński, ZEUS  suppression of 20-50 % observed at low ET  expected in renormalization model

12. LISHEP 2009, Brazil, Jan 19-24 DIFFRACTIVE AND EXCLUSIVE PRODUCTION AT CDF II K. GOULIANOS 12 DISCUSSION

13. LISHEP 2009, Brazil, Jan 19-24 DIFFRACTIVE AND EXCLUSIVE PRODUCTION AT CDF II K. GOULIANOS 13 thank you