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Electroweak double-logs at small x
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DOI：10.1088/1126-6708/2008/05/039.png)
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摘要
En 中文
We investigate enhanced EW corrections to inclusive hard processes in the TeV energy region with emphasis on the small-x situation, in which the hard scale Q is significantly smaller than the available energy root s equivalent to Q/x. We first propose and justify a general factorization formula in which the (double-log) EW form factor at scale Q(2) is factorized from EW parton distribution functions, which satisfy evolution equations of DGLAP type. We then investigate the small-x behavior of the EW parton distributions including the novel ones for non-vanishing t-channel weak isospin T and we compare it with a BFKL-type approach. In either approach we find that large small-x corrections of order alpha(omega) log x log Q(2)/M-2 (M being the EW symmetry breaking scale) are present only for T = 2 and not for T = 1, thus affecting only transverse W W interactions. We finally note that the T = 2 component is turned off in flavour-blind measurements at LHC, which therefore feel just the EW form factor at scale Q (2).
Keyword:
W-PAIR PRODUCTION
RADIATIVE-CORRECTIONS
STANDARD MODEL
HIGH-ENERGY
TEV SCALE
CROSS-SECTIONS
QCD
REGGEIZATION
LOGARITHMS
SINGULARITY
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期刊
IF:
5.5
论文数:
4.0W
被引数:
13.7W
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引用论文
Electroweak double logarithms in inclusive observables for a generic initial state.png)
PHYSICS LETTERS BOAAI
PHYSICS LETTERS BIF4.5
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