Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-10-22
JHEP 0812:040,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
27 pages, 4 figures, 2 tables, mathematica and c++ code attached, minor changes and corrections of typos
Scientific paper
10.1088/1126-6708/2008/12/040
We present our results for the NNLL virtual corrections to the matrix elements of the operators O_1 and O_2 for the inclusive process b\to s\ell^+\ell^- in the kinematical region q^2>4m_c^2, where q^2 is the invariant mass squared of the lepton-pair. This is the first analytic two-loop calculation of these matrix elements in the high q^2 region. We give the matrix elements as an expansion in m_c/m_b and keep the full analytic dependence on q^2. Making extensive use of differential equation techniques, we fully automatize the expanding of the Feynman integrals in m_c/m_b. In coincidence with an earlier work where the master integrals where calculated numerically (Ghinculov et al.) we find that in the high q^2 region the \alpha_s corrections to the matrix elements calculated in the present paper lead to a decrease of the q^2-spectrum by 10%-15% relative to the NNLL result in which these contributions are put to zero and reduce the renormalization scale uncertainty to ~2%.
Greub Christoph
Pilipp Volker
Schupbach Christof
No associations
LandOfFree
Analytic calculation of two-loop QCD corrections to b\to s\ell^+\ell^- in the high q^2 region does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Analytic calculation of two-loop QCD corrections to b\to s\ell^+\ell^- in the high q^2 region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analytic calculation of two-loop QCD corrections to b\to s\ell^+\ell^- in the high q^2 region will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-417041