Resummation Effects in the Search of SM Higgs Boson at Hadron Colliders

Qing-Hong Cao; Chuan-Ren Chen

doi:10.1103/PhysRevD.76.073006

paper

Resummation Effects in the Search of SM Higgs Boson at Hadron Colliders

arXiv:0704.1344 · doi:10.1103/PhysRevD.76.073006

Abstract

We examine the soft-gluon resummation effects, including the exact spin correlations among the final state particles, in the search of the Standard Model Higgs boson, via the process $g g \to H \to W W / Z Z \to 4 l e pt o n s, a tt h e T e v a t r o nan d t h e L H C . A co m p a r i so nb e tw ee n t h er es u mma t i o nan d t h e N e x t - t o - L e a d in g or d er (N L O) c a l c u l a t i o ni s p er f or m e d a f t er im p os in g v a r i o u s k in e ma t i csc u t ss ug g es t e d in t h e l i t er a t u r e f or t h eH i g g s b oso n se a r c h . F or t h e$ H\to ZZ $m o d e, t h er es u mma t i o n e f f ec t s in cr e a se t h e a cce pt an ceo f t h es i g na l e v e n t s b y ab o u t 25$ H\to WW$ mode, the acceptance rates of the signal events predicted by the resummation and NLO calculations are almost the same, but some of the predicted kinematical distributions are quite different. Thus, to precisely determine the properties of the Higgs boson at hadron colliders, the soft-gluon resummation effects have to be taken into account.

The version to appear in PRD

Resummation Effects in the Search of SM Higgs Boson at Hadron Colliders

Abstract

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