Leading asymmetries in two-hadron production in e^+e^- annihilation at the Z pole

Details Leading asymmetries in two-hadron production in e^+e^- annihilation at the Z pole Leading asymmetries in two-hadron production in e^+e^- annihilation at the Z pole

1997-11-27

arxiv.org/abs/hep-ph/9711488v2

Phys.Lett.B424:143-151,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, Revtex, 2 Postscript figures, uses epsf.sty. Some typos corrected, minor clarifying changes, one reference added, inc

Scientific paper

10.1016/S0370-2693(98)00136-1

We present the leading unpolarized and single spin asymmetries in inclusive two-hadron production in electron-positron annihilation at the Z pole. The azimuthal dependence in the unpolarized differential cross section of almost back-to-back hadrons is a leading cos(2 phi) asymmetry, which arises solely due to the intrinsic transverse momenta of the quarks. An extensive discussion on how to measure this asymmetry and the accompanying time-reversal odd fragmentation functions is given. A simple estimate indicates that the asymmetry could be of the order of a percent.

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