Dissipative processes in superfluid quark matter

We present some results about dissipative processes in fermionic superfluids that are relevant for compact stars. At sufficiently low temperatures the transport properties of a superfluid are dominated by phonons. We report the values of the bulk viscosity, shear viscosity and thermal conductivity of phonons in quark matter at extremely high density and low temperature. Then, we present a new dissipative mechanism that can operate in compact stars and that is named "rocket term". The effect of this dissipative mechanism on superfluid r-mode oscillations is sketched.Comment: 6 pages, 1 figure. Prepared for QCD@work 2010 - International Workshop on QCD - Theory and Experiment, 20-23 June 2010, Martina Franca - Valle d'Itria - Ital

Pion Mass Modification in presence of external magnetic field

In this work, the self energies of $\pi^0$ and $\pi^{\pm}$ up to one loop order have been calculated in the limit of weak external magnetic field. The effective masses are explicitly dependent on the magnetic field which are modified significantly for the pseudoscalar coupling due to weak field approximation of the external field. On the other hand, for the pseudovector coupling, there is a modest increment in the effective masses of the pions. These theoretical developments are relevant for the study of the phenomenological aspect of mesons in the context of neutron stars as well as heavy ion collisions.Comment: Published in conference proceedings of DAE-HEP-2016 (XXII DAE High Energy Physics Symposium, New Delhi, India

Creativity in Social Networks: A Core-Periphery Perspectiv

Building on socio-structural explanations, this article elaborates on the tension between individual actors’ positions along the core-periphery continuum of the social field and their ability to gain legitimacy for their creative work. Peripheral actors are less constrained by the field’s normative pressures and free to experiment with un- conventional ideas and solutions, but they may struggle to mobilize attention and harness the symbolic and material resources needed to legitimate their work. By contrast, core players are more effective at leveraging networks to build consensus, but they often exhibit a propensity toward more incremental work due to their higher levels of assimilation into the conventions of the field. To resolve this tension this article advances a strategy which we term optimal network structuration strategy . This strategy implies forming ties that link the two ends of the core-periphery spectrum, in the attempt to increase the likelihood of generating novelty while also enhancing the ability to make such novelty manifest and visible to the field. The theoretical and managerial implications are discussed

Top-philic Vector-Like Portal to Scalar Dark Matter

We investigate the phenomenology of scalar singlet dark matter candidates that couple dominantly to the Standard Model via a Yukawa interaction with the top quark and a colored vector-like fermion. We estimate the viability of this vector-like portal scenario with respect to the most recent bounds from dark matter direct and indirect detection, as well as to dark matter and vector-like mediator searches at colliders. Moreover, we take QCD radiative corrections into account in all our theoretical calculations. This work complements analyses related both to models featuring a scalar singlet coupled through a vector-like portal to light quarks, and to scenarios in which the dark matter is a Majorana singlet coupled to the Standard Model through scalar colored particles (akin to simplified models inspired by supersymmetry). Our study puts especially forward the complementarity of different search strategies from different contexts, and we show that current experiments allow for testing dark matter masses ranging up to 700 GeV and mediator masses ranging up to 6 TeV.Comment: 15 pages, 11 figures; version accepted by PR

Interview of Eugene Colucci

Abstract Mr. Eugene Colucci (b. 1948) is a Spanish teacher at Buena Regional High School in Atlantic County, New Jersey. This is his twentieth year as an educator at BRHS in the New Jersey public school system. Before this, Mr. Colucci spent nineteen years teaching in the Catholic school system of Philadelphia (St. Peter’s Elementary, Bishop Neumann High School, and St. Maria Goretti High School). He has a unique perspective because he spent so much time in both the public and private school environments. He describes his youth in the Catholic school system of Philadelphia and describes growing up in a predominantly Italian-American neighborhood in South Philadelphia. Mr. Colucci earned a BA in Liberal Arts from Millersville University in 1970 and a MA in Bi-Lingual Bi-Cultural studies from La Salle in 1991. He continued his studies in education by earning Supervisor Certificates from Rowan University in Spanish, Elementary Education, Bi-Lingual studies, and ESL (English as a Second Language). Before his professional career began Mr. Colucci served in the Army National Guard in 1970. During his time in the service he was a company clerk and befriended an Army photographer who taught him how to operate a camera. This knowledge of photography helped him get a job at St. Maria Goretti because they had a dark room but no educator who could operate it. Mr. Colucci eventually purchases a local camera studio, “Castileana Studios”, through which he operated his own photography business that catered to weddings and special events. This interview documents Mr. Colucci’s life, cultural heritage, military service, and how La Salle helped him transfer into a career in public education

In or out? Barriers and facilitators to refugee-background young people accessing mental health services

Refugee young people have been identified as a group with high risk for mental health problems, due to their experience of trauma, forced migration, and stressors associated with settlement. A high prevalence of mental health problems is reported in this group, however some research suggests refugee young people have low rates of mental health service access. There is little information available on barriers and facilitators to mental service delivery for this group. Using data from 15 focus groups and five key informant interviews with a total of 115 service providers from 12 agencies in Melbourne, Australia, this paper explores barriers and facilitators to engaging young people from refugee backgrounds with mental health services. Eight key themes emerged: cultural concepts of mental health, illness, and treatment; service accessibility; trust; working with interpreters; engaging family and community; the style and approach of mental health providers; advocacy; and continuity of care