TY - JOUR

T1 - Bound-state effects on kinematical distributions of top quarks at hadron colliders

AU - Sumino, Yukinari

AU - Yokoya, Hiroshi

PY - 2010

Y1 - 2010

N2 - First we present a theoretical framework to compute the fully differential cross sections for the top-quark productions and their subsequent decays at hadron colliders, incorporating the bound-state effects which are important in the tt̄ threshold region. We include the bound-state effects such that the cross sections are correct in the LO approximation both in the threshold and high-energy regions. Then, based on this framework we compute various kinematical distributions of top quarks as well as of their decay products at the LHC, by means of Monte-Carlo event-generation. These are compared with the corresponding predictions based on conventional perturbative QCD. In particular, we find a-characteristic bound-state effect on the (bW+)- (b̄W-) double-invariant-mass distribution, which is deformed to the lower invariant-mass side in a correlated manner.

AB - First we present a theoretical framework to compute the fully differential cross sections for the top-quark productions and their subsequent decays at hadron colliders, incorporating the bound-state effects which are important in the tt̄ threshold region. We include the bound-state effects such that the cross sections are correct in the LO approximation both in the threshold and high-energy regions. Then, based on this framework we compute various kinematical distributions of top quarks as well as of their decay products at the LHC, by means of Monte-Carlo event-generation. These are compared with the corresponding predictions based on conventional perturbative QCD. In particular, we find a-characteristic bound-state effect on the (bW+)- (b̄W-) double-invariant-mass distribution, which is deformed to the lower invariant-mass side in a correlated manner.

KW - Hadronic colliders

KW - Heavy quark physics

KW - QCD

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U2 - 10.1007/JHEP09(2010)034

DO - 10.1007/JHEP09(2010)034

M3 - Article

AN - SCOPUS:78649789324

SN - 1029-8479

VL - 2010

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 9

M1 - 34

ER -