arXiv subjects

C. B. Paranavitane

Publications and source records attributed to C. B. Paranavitane.

3 recordsLinked to original sources

arXiv2000

The Color Singlet Relativistic Correction in $J/ψ$ Photoproduction

The $O(v^2)$ relativistic correction for inelastic $J/ψ$ photoproduction, in which heavy quark pairs are in the dominant Fock state of the quarkonium, is studied in the framework of NRQCD factorization. An assessment of its significance, particularly in comparison to the color octet contributions, is made. It is found that the impact on the energy distribution is negative in certain regions of phase space. The predictions are compared with photoproduction data from DESY-HERA.

hep-ph↗

arXiv1997

$J/Ψ$-Production at Photon-Photon Colliders as a Probe of the Color Octet Mechanism

We study $J/Ψ$ production at photon-photon colliders, which can be realised with Compton scaterring of laser photons at $e^+e^-$ colliders. We find that the production rate through the color-octet channel is comparable to that through the color-singlet channel. Experimentally the two mechanisms can be studied separately because the processes have different signals.

hep-ph↗

arXiv1994

More on random-lattice fermions

The lattice fermion determinants, in a given background gauge field, are evaluated for two different kinds of random lattices and compared to those of naive and wilson fermions in the continuum limit. While the fermion doubling is confirmed on one kind of lattices, there is positive evidence that it may be absent for the other, at least for vector interactions in two dimensions. Combined with previous studies, arbitrary randomness by itself is shown to be not a sufficient condition to remove the fermion doublers.

hep-lat↗