Production of He-4 and (4) in Pb-Pb collisions at root(NN)-N-S=2.76 TeV at the LHC

Results on the production of He-4 and (4) nuclei in Pb-Pb collisions at root(NN)-N-S = 2.76 TeV in the rapidity range vertical bar y vertical bar <1, using the ALICE detector, are presented in this paper. The rapidity densities corresponding to 0-10% central events are found to be dN/dy4(He) = (0.8 +/- 0.4 (stat) +/- 0.3 (syst)) x 10(-6) and dN/dy4 = (1.1 +/- 0.4 (stat) +/- 0.2 (syst)) x 10(-6), respectively. This is in agreement with the statistical thermal model expectation assuming the same chemical freeze-out temperature (T-chem = 156 MeV) as for light hadrons. The measured ratio of (4)/He-4 is 1.4 +/- 0.8 (stat) +/- 0.5 (syst). (C) 2018 Published by Elsevier B.V.Peer reviewe

On the role of the charm quark in the Delta I = 1/2

Tesis Doctoral inédita leída en la Universidad Autónoma de Madrid, Facultad de Ciencias, Departamento de Física Teórica. Fecha de lectura: 07/02/201

Wood anatomy of rauvolfioideae (apocynaceae): a search for meaningful non-dna characters at the tribal level

Wood anatomical Studies in the economically important Apocynaceae or dogbane family are fragmentary. This study represents a first attempt to unravel the phylogenetic significance and major evolutionary trends in the wood of the family, using existing and new microscopic wood observations within the large subfamily Rauvolfioideae. On the basis of LM and SEM observations of 91 species representing all 10 currently recognized tribes, we found that most of the tribes are characterized by a unique combination of wood characters, such as vessel grouping, vessel element length, fiber type, frequency Of uniseriate rays, and fused multiseriate rays. Climbing rauvolfioid taxa can generally be distinguished from erect species by their wider vessels, tendency to form paratracheal axial parenchyma, presence of tracheids, and occurrence of laticifers in rays. With respect to the entire family, there is a general phylogenetic trend toward shorter vessel elements, a higher proportion of vessels in Multiples and more vessels per multiple, higher tracheid abundance, more paratracheal parenchyma, and fewer cells per axial parenchyma strand in the more derived Apocynaceae. Most of these evolutionary trends are likely to be triggered by drier environmental conditions and/or shifts from an erect to a climbing habit.status: publishe

Theology, Politics and Society: the Missing Link. Studying Religion in the Mamluk Period

The chapter focuses on a few problematic topics which have so far received little attention in contemporary scholarship on religion in the Mamluk period. In particular it tries to shed light on what the author describes as a missing link between theological production and its social and political significance, between theologians and society at large, between ideas about God and their relevance to people\u2019s lives. The article argues that exploring the link between society and theology may be a rewarding research enterprise. An attention to this link is generally missing in scholarship both on the intellectual and the socio-religious history of the Mamluk period. The paper identifies the reasons for this state of affairs and provides a sample of materials that proves that we do not lack the resources for pursuing research in this direction. The paper advocates an interdisciplinary approach where the efforts of experts in Islamic theology and historians interested in religion and society ought to merge