The Tcc = DD* molecular state

We show that the molecule-like configuration of DD^* enables weak binding with two realistic potential models (Bhaduri and Grenoble AL1). Three-body forces may increase the binding and strengthen the cc diquark configuration. As a signature we propose the branching ratio between radiative and pionic decay.Comment: 19 pages, 18 figures, revised version, to be published in Few-Body System

Proton Spin in Deep Inelastic Scattering

So far the analyses of the polarized structure functions of the proton and neutron have been limited to the evaluation of their integrals and comparing them to the prediction of the static quark model of the nucleon. We extended our analysis to the x dependence of the polarized structure functions and observe: the measured structure function excellently agrees with the prediction of the static quark model for Bjorken $x>0.2$ and drops rapidly for $x<0.2$. It is suggested that for Bjorken $x>0.2$ electrons get scattered on the undamaged constituent quarks (alias valence quarks) denoted as quasi-elastic scattering on the constituent quarks and for $x<0.2$ the constituent quarks fragment. In the fragmentation strong interaction is involved which does not preserve the polarization.Comment: 6 pages, 4 figures, Presented at the workshop on Diffraction and Low-x, Reggio Calabria, Aug. 26-Sept. 1, 201

Double heavy baryons and dimesons

We critically examine the question whether the cc\bar{q}\bar{q} dimeson is bound or not.Comment: Talk presented at the Fourth Int. Conf. on Perspectives in Hadronic Physics, ICTP - Trieste; May 12-16, 2003; to be published in European Journal of Physics A; 6 pages LaTe

Recreations in geology

https://scholars.unh.edu/geology_books/1000/thumbnail.jp

Exploration during turbulent times an analysis of the effects of R&D cooperation on radical innovation performance during the economic crisis

During the recent economic recession, firms have been less willing to invest in innovation, which often is an uncertain and long-term process. This reduction did not occur equally for all firms, and recent literature has analysed the characteristics of those firms which maintain or even raise their innovative efforts during the crisis. Technological collaboration has been recognised as one of the most important external sources that affects innovation performance. However, how economic recession has changed the impact of R and D collaboration on innovation performance has received few attention. This paper investigates the effect of different external cooperation patterns of firms before and during the last economic recession. We highlight the role of geographical and organizational diversity of knowledge sources, as well as the effect of past experience. We find that R and D cooperation has a stronger effect on radical innovation performance during the economic recession than before, this being true irrespectively of the geographical location of the partners. This benefit from cooperation during the economic turmoil is higher in the case of firms having a diverse portfolio of partners. In addition, we also find that past experience in R and D cooperation positively affects innovation performance during the crisis

Exploration during turbulent times: an analysis of the relation between cooperation in innovation activities and radical innovation performance during the economic crisis

This article investigates the relation between cooperation in innovation activities and innovation before and during the last economic recession. We find that cooperation in innovation activities has a stronger relation with radical innovation performance during the economic recession than before, this being true irrespectively of whether the partners are national or international. This benefit from cooperation during the economic turmoil is higher in the case of firms having different types of partners simultaneously. We also find that past cooperation in innovation activities is positively associated to innovation performance during the crisis

A pragmatics of intimacy

This study examines the ways in which multiple modern communication technologies facilitate, across time and space, the maintenance of a close interpersonal relationship between two best friends. The analysis, which focuses mainly on the openings and closings of the different types of communications, reveals a tendency for the friends to shorten openings and extend closings. However, this is possible only if the friends are fully aware of, and care about, the practical, social and emotional details of each other’s lives during periods of absence. The concomitant linguistic behaviours in their interpersonal interactions could be described as a kind of pragmatics of intimacy which cannot be achieved without the explicit and practical demonstration of that mutual care and concern