1. BFKL and High Energy Phenomenology
Victor T. Kim
St. Petersburg Nuclear Physics Institute
Gatchina
HSQCD 2004
May 19, 2004

2. St.Petersburg Nuclear Physics Instiutute
Outline
BFKL: introduction
BFKL: jet production
BFKL: gamma-gamma collisions
summary
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

3. St.Petersburg Nuclear Physics Instiutute
LO BFKL:
Fadin, Kuraev & Lipatov (75-77)
Balitsky & Lipatov (78)
Summing leading Log(s) in all orders:
σ ~ (s/s0)ω
Bottom lines:
ω ≈ 0.5 too big!
no running αS
s0 ?
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

4. St.Petersburg Nuclear Physics Instiutute
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

5. NLO BFKL with BLM resummation
Summing β0-terms into the scale of running coupling
Brodsky, Fadin, VK, Lipatov & Pivovarov (98-99)
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

6. Mueller-Navelet factorization
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

7. kT-factorization scheme
Catani, Hauptmann & Marchesini; Ciafaloni (90-94)
Levin, Ryskin, Shabelsky & Shuvaev (91)
Collins & K. Ellis (91)
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

8. St.Petersburg Nuclear Physics Instiutute
BFKL-factorization
VK & Pivovarov (96-98)
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

9. BFKL: dijet production
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

10. Dijet azymuthal decorrelation
VK & Pivovarov (96,98)
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

11. St.Petersburg Nuclear Physics Instiutute
Dijet K-factor
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

12. St.Petersburg Nuclear Physics Instiutute
Jet xT-scaling ratio
VK & Pivovarov (98)
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

13. Gamma-gamma collisions
Gribov,Flolov & Lipatov (70)
LO BFKL
Balitsky & Lipatov (78)
Brodsky,Hautmann & Soper (97)
Bartels et al (98)
De Roeck et al (2001)
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

14. Gamma-gamma collisions
LO BFKL:
Balitsky & Lipatov (78)
Brodsky,Hautmann & Soper (96-97)
Bartels et al (97)
De Roeck et al (99)
NLO BFKL:
VK, Lipatov & Pivovarov (99)
Brodsky, Fadin, VK, Lipatov & Pivovarov (01-02)
Kwiecinski & Motyka (01)
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

15. St.Petersburg Nuclear Physics Instiutute
Brodsky, Fadin, VK, Lipatov & Pivovarov (01-02)
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

16. St.Petersburg Nuclear Physics Instiutute
Linear colliders
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

17. Gamma-gamma to heavy quarks
LO BFKL
Balitsky & Lipatov (78)
Kwiecinski & Motyka (99)
Bartels, Ewerz et al (99)
Ginzburg (01)
NLO BFKL
VK & Lipatov
few nb
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

18. St.Petersburg Nuclear Physics Instiutute
Summary
NLO BFKL becomes noticeable
in gamma-gamma at high energies
Jet production ?
Heavy quarks ?
Monte Carlo generators needed
BFKL factorization ?
Unitarity corrections ?
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

19. St.Petersburg Nuclear Physics Instiutute
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute

20. St.Petersburg Nuclear Physics Instiutute
HSQCD 2004
May 19, 2004
Victor T. Kim
St.Petersburg Nuclear Physics Instiutute