BFKL and High Energy Phenomenology

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Presentation transcript:

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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