当前位置:文档之家 > Top Quark Pair Production at Threshold Complete Next-to-next-to-leading Order Relativistic

Top Quark Pair Production at Threshold Complete Next-to-next-to-leading Order Relativistic

a r X i v :h e p -p h /9801397v 1 23 J a n 1998UCSD/PTH 98-01

DESY 98-008

hep-ph/9801397

January 1998

Top Quark Pair Production at Threshold:Complete Next-to-next-to-leading Order Relativistic Corrections A.H.Hoang a and T.Teubner b a Department of Physics,University of California,San Diego,La Jolla,CA 92093-0319,USA b Deutsches Elektronen-Synchrotron DESY,D-22603Hamburg,Germany Abstract The complete next-to-next-to-leading order (i.e.O (v 2),O (vαs )and O (α2s ))relativistic cor-rections to the total photon mediated t ¯t

productio
n cross section at threshold are presented in the framework of nonrelativistic quantum chromodynamics.The results are obtained using semi-analytic methods and “direct matching”.The size of the next-to-next-to-leading order relativistic corrections is found to be comparable to the size of the next-to-leading order ones.

production cross section at threshold are presented in the framework of nonrelativistic quantum chromodynamics.The results are obtained using semi-analytic methods and “direct matching”.The size of the next-to-next-to-leading order relativistic corrections is found to be comparable to the size of the next-to-leading order ones.

PACS numbers:14.65.Ha,13.85.Lg,12.38.Bx.

Next-to-next-to-leading order vacuum polarization function of heavy quark near threshold an

threshold production of heavy quark-antiquark pair...complete next-to-next-to-leading order corrections...Top Quark Pair Product... 9页 免费 Top Quark ...

Leptoquark Pair Production in gammagamma Scattering Threshold Resummation

Leptoquark Pair Production in gammagamma Scattering Threshold Resummation_理学_...The second order QED corrections are still of the size of O (10%) of ...

Threshold resummation of the total cross section for heavy quark production in hadronic col

Threshold resummation of the total cross section ...next-to-leading order, O( 3), involve gluonic...production of a top quark-antiquark pair, i.e...

Heavy-Quark Form Factors and Threshold Cross Section at O(alpha_S^2)

rst (in particular for the top quark that has ...cross section to O(αS ) at the production ?...threshold of the QQ pair, due to γ and Z ...