Non-perturbative computation of double inclusive gluon production in the Glasma

The near-side ridge observed in A+A collisions at RHIC has been described as arising from the radial flow of Glasma flux tubes formed at very early times in the collisions. We investigate the viability of this scenario by performing a non-perturbative numerical computation of double inclusive gluon production in the Glasma. Our results support the conjecture that the range of transverse color screening of correlations determining the size of the flux tubes is a semi-hard scale, albeit with non-trivial structure. We discuss our results in the context of ridge correlations in the RHIC heavy ion experiments.Comment: 25 pages, 11 figures, uses JHEP3.cls V2: small clarifications, published in JHE

QCD and strongly coupled gauge theories : challenges and perspectives

We highlight the progress, current status, and open challenges of QCD-driven physics, in theory and in experiment. We discuss how the strong interaction is intimately connected to a broad sweep of physical problems, in settings ranging from astrophysics and cosmology to strongly coupled, complex systems in particle and condensed-matter physics, as well as to searches for physics beyond the Standard Model. We also discuss how success in describing the strong interaction impacts other fields, and, in turn, how such subjects can impact studies of the strong interaction. In the course of the work we offer a perspective on the many research streams which flow into and out of QCD, as well as a vision for future developments.Peer reviewe

Membrane Microdomains and cAMP Compartmentation in Cardiac Myocytes

Signaling through the diffusible second messenger, 3′,5′-cyclic adenosine monophosphate (cAMP) is critical to the regulation of cardiac function. Several different G-protein-coupled receptors, including β-adrenergic receptors, muscarinic receptors, and E-type prostaglandin receptors, elicit distinct responses using this ubiquitous second messenger. One critical paradigm that has emerged to explain this behavior is that cAMP signaling is compartmentalized. Spatially confining specific receptors and their downstream effector proteins to form subcellular signaling complexes has been proposed to allow for the high efficiency and fidelity in producing specific functional responses. In cardiac myocytes, lipid rafts created by cholesterol- and sphingolipid-rich membrane microdomains have been demonstrated to act as one means of sorting appropriate receptors and corresponding effectors to relevant subcellular locations. Caveolae, which represent a specific subset of lipid rafts, can dynamically attract or exclude specific signaling proteins through a variety of mechanisms to create highly localized and self-sufficient multi-molecular signaling complexes. Furthermore, disruption of this organization in disease states such as heart failure has been found to alter cAMP responses. In this review, we summarize the current understanding of the role of membrane domains in cAMP signaling in cardiac myocytes. We also highlight the insights gained from previous studies to offer new avenues of research in this expanding field of study.https://digitalcommons.chapman.edu/pharmacy_books/1021/thumbnail.jp