Speaker
Dr
Giuseppe Bozzi
(ITP Karlsruhe)
Description
We consider Higgs boson production by gluon fusion in hadron collisions. We study the
doubly-differential transverse-momentum (qT ) and rapidity (y ) distribution of the
Higgs boson in perturbative QCD. In the region of small qT (qT << M_H , M_H being the
mass of the Higgs boson), we include the effect of logarithmically-enhanced
contributions due to multiparton radiation to all perturbative orders. We use the
impact parameter and double Mellin moments to implement and factorize the multiparton
kinematics constraint of transverse- and longitudinal-momentum conservation. The
logarithmic terms are then systematically resummed in exponential form.
At small qT , we perform the all-order resummation of large logarithms up to
next-to-next-to-leading logarithmic accuracy, while at large qT (qT ∼ M ), we apply a
matching procedure that recovers the fixed-order perturbation theory up to
next-to-leading order.
We present quantitative results for the differential cross section in qT and y at the
LHC, and we comment on the comparison with the qT cross section integrated over y .
Author
Dr
Giuseppe Bozzi
(ITP Karlsruhe)
Co-authors
Prof.
Daniel De Florian
(Universidad de Buenos Aires)
Dr
Massimiliano Grazzini
(INFN-Firenze)
Dr
Stefano Catani
(INFN-Firenze)
