Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-10-07
Phys.Rev.D49:190,1994; Erratum-ibid.D51:1428,1995
Physics
High Energy Physics
High Energy Physics - Phenomenology
66 pages, 20 Postscript figures in 2 files, uses REVTeX v3.0
Scientific paper
10.1103/PhysRevD.49.190 10.1103/
In the Standard Model the process $q\bar{q}\rightarrow q\bar{q}V$ (where $V=W^\pm,Z^0$ or $\gamma$) can occur via gluon exchange and also via $W^\pm$ or $Z^0$ exchange. The corresponding chromodynamic and electroweak amplitudes can interfere with one another. These interference cross sections are largest when the exchanged $W^\pm$ or $Z^0$ is on-shell when they are also odd under parity. Interference cross sections computed using helicity-amplitude techniques are presented for all interesting subprocesses as well as for the processes $q\bar{q}\rightarrow q\bar{q} l\bar{l}$ in which the lepton pair $l\bar{l}$ comes from the decay of $V$ on-shell. Parity-violating asymmetries are defined and presented at the parton level and for the hadronic processes $pp$ or $p\bar{p}\rightarrow V$ + 2 jets or $l\bar{l}$ + 2 jets. These asymmetries are independent of the polarizations of all particles involved, and do not require that the flavors of the jet partons be measured. They are generally of order 0.01 pb at energies $\sqrt{s} \gtrsim 1$ TeV.
Gonsalves Richard J.
Wai C. F.
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