Azimuthal Distribution of Quark-Antiquark Jets in DIS Diffractive Dissociation

Details Azimuthal Distribution of Quark-Antiquark Jets in DIS Diffractive Dissociation Azimuthal Distribution of Quark-Antiquark Jets in DIS Diffractive Dissociation

1996-05-20

arxiv.org/abs/hep-ph/9605356v1

Phys.Lett. B386 (1996) 389-396

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, latex, 7 figures

Scientific paper

10.1016/0370-2693(96)81071-9

We investigate the azimuthal distribution of quark-antiquark jets in DIS diffractive dissociation with large transverse momentum. In this kinematical region the matrix element is expressed in terms of the gluon structure function. For the transverse part of the cross section we find a $\cos(2 \phi)$-distribution with the maximum at $\phi = \pm \pi/2$, i.e.\ the jets prefer a direction perpendicular to the electron plane. This is in contrast to boson gluon fusion where the $q\bar{q}$ jet cross section for transversely polarized bosons peaks at $\phi=0$ and $\phi=\pi$. We discuss the origin of this striking difference and present numerical results relevant for the diffractive dissociation at HERA.

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