19 research outputs found
Small x gluon from exclusive J/psi production
Exclusive J/psi production, gamma* p -> J/psi p, offers a unique opportunity
to determine the gluon density of the proton in the small x domain. We use the
available HERA data to determine the gluon distribution in the region 10^{-4}
<~ x <~ 10^{-2} and 2 <~ Q^2 <~ 10 GeV^2, where the uncertainty on the gluon
extracted from the global parton analyses is large. The gluon density is found
to be approximately flat at the lower scale; it is compared with those of
recent global analyses.Comment: 13 pages, 5 figure
Generalised parton distributions at small x
We justify the practical use of the Shuvaev integral transform approach to
calculate the skewed distributions, needed to describe diffractive processes,
directly from the conventional diagonal global parton distributions. We address
doubts which have been raised about this procedure. We emphasise that the
approach, on the one hand, satisfies all theoretical reqirements, and, on the
other hand, is consistent with DVCS data at NLO. We construct an easily
accessible package for the computation of these skewed distributions.Comment: 21 pages, 10 figures. New title. Extra Fig. 2 and extra Section 5 to
compare with alternative treatment of GPDs. Numerical results unchanged. To
be published in EPJ
In a Trinitarian Embrace: Reflections from a Local Eucharistic Community in a Global World
The context of the chapter is an Anglican “liberal Catholic” congregation in the Church of England, within a multicultural northern UK city, where those who gather represent the diversity of the globalized, postcolonial world. The chapter highlights the relationship between Anglo-Catholic Eucharistic liturgy, with its Trinitarian form, and feminist commitment to justice-making. The exclusion of feminist reimagining from current rethinking of Trinitarian theology is challenged by affirming the place of a sparse Trinitarian rule, in order to expose heteropatriarchal contraventions of the rule and then to re-site feminist reimagining in relation to it. This enables female imagery for God to infuse, rather than displace, classical liturgical language of God as Father-Son-Spirit, and undermines deeply entrenched heteropatriarchal contraventions. The metaphor of a Trinitarian embrace reflects this opening of the received Trinitarian liturgical form. The impetus for the feminist struggle for justice is found in being swept up into Christ through the Trinitarian missio Dei, in anticipation of the abundant table spread by Divine Wisdom for all people