ar X iv : h ep - p h / 98 05 20 8 v 2 4 M ay 1 99 8 CU - TP - 889 Running Coupling Effects in BFKL Evolution ∗

ar X iv : h ep - p h / 98 05 20 8 v 1 1 M ay 1 99 8 CU - TP - 889 Running Coupling Effects in BFKL Evolution ∗

We resum the recently calculated second order kernel of the BFKL equation. That kernel can be viewed as the sum of a conformally invariant part and a running coupling part. The conformally invariant part leads to a corrected BFKL intercept as found earlier. The running couplng part of the kernel leads to a non-Regge term in the energy dependence of high energy hard scattering, as well as a Q2−d...

ar X iv : h ep - p h / 02 05 16 7 v 1 1 5 M ay 2 00 2 CU - TP - 1057 The Energy Dependence of the Saturation Momentum

We study BFKL evolution and, in particular, the energy dependence of the saturation momentum in the presence of saturation boundaries limiting the region of linear BFKL evolution. In the case of fixed coupling evolution we confirm the previously found exponential term in Q s (Y) and determine the prefactor Y and α dependences. In the running coupling case we find Y 1/6 corrections to the Y 1/2 ...

ar X iv : h ep - p h / 98 05 30 4 v 1 1 3 M ay 1 99 8 Λ b → Λ c P ( V ) Nonleptonic Weak Decays

ar X iv : h ep - p h / 99 05 53 4 v 1 2 8 M ay 1 99 9 1 Renormalization group improved

The calculation of next-to-leading log x corrections to the BFKL equation was completed last year [ 1, 2] after several years of theoretical effort. The results, for both anomalous dimension and hard Pomeron, show however signs of instability due to both the size and the (negative) sign of corrections, possibly leading to problems with positivity also [ 3]. If we write the eigenvalue equation c...

ar X iv : h ep - p h / 98 05 46 8 v 1 2 6 M ay 1 99 8 COURSE HEAVY QUARK PHYSICS