Suicide in India.

Eikonalised minijet model analysis of σ inel γγ. Abstract We study the theoretical predictions for the total inelastic γγ cross-sections, with an emphasis on the eikonalised minijet model (EMM). In the context of the EMM, we discuss a new ansatz for the overlap function involving the photons. We discuss the dependence of the EMM predictions on various input parameters as well as predictions for σ inel γγ from a simple extension of the Regge Pomeron Exchange model. We then compare both with the recent LEP data. The measurement of the total photoproduction cross-sections at HERA [1, 2] and the recent measurements of the hadronic γγ cross-sections at LEP [3, 4], have established that all total cross-sections, involving hadrons [5, 6] as well as photons, rise as the c.m. energy of the colliding particles increases. The similarity in the energy dependence of all total cross-sections, suitably scaled to take into account the difference between hadrons and a photon, is striking. Fig.(1) demonstrates this. In the figure the cross-sections for photon-induced processes have been multiplied by factors motivated by simple quark-model considerations and the probability for a photon to fluctuate in a q ¯ q pair P had γ , so as to facilitate comparison with pp and ¯ pp data. We will discuss the choice of P had γ later. In the light of the new γγ data the impetus * On leave of absence from