Production of heavy quarks close to threshold
- 1 December 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 52 (11) , 6577-6594
- https://doi.org/10.1103/physrevd.52.6577
Abstract
We calculate production by vector and axial vector currents of heavy quark pairs (cc¯,bb¯,tt¯) close to threshold. We take into account strong interaction contributions (including radiative corrections and leading nonperturbative effects) by using the Fermi-Watson final-state interaction theorem. We use the results obtained to compare with experiment for open production of cc¯,bb¯ near threshold, and to give a reliable estimate of the so-called ‘‘threshold effects’’ contribution to vector and axial vector correlators, for tt¯, i.e., the contribution of regions close to 4 to Π(t), for small values of t (0t≲).
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