Manifestation of proton structure in the initial-state anisotropies in high-energy proton-proton collisions

Ridge-like correlations in high-energy proton-proton collisions reported by the CMS collaboration suggest a collective flow that resembles the one in heavy-ion collisions. If the hydrodynamic description is valid then the effect results from the initial anisotropy of the colliding matter which depends on the structure of protons. Following recent theoretical developments, we propose several phenomenological models of the proton structure and calculate the anisotropy coefficients using the Monte Carlo Glauber model. Our estimates suggest that the event multiplicity dependence allows one to discriminate between different proton models.Comment: 15 pages, 7 figures, submitted to Lith. J. Phys, corrected plot

Climate Impact Storylines for Assessing Socio-Economic Responses to Remote Events

Complex interactions involving climatic features, socio-economic vulnerability or responses, and long impact transmissions are associated with substantial uncertainty. Physical climate storylines are proposed as approach to explore complex impact transmission pathways and possible alternative unfolding of event cascades under future climate conditions. These storylines are particularly useful for climate risk assessment for complex domains, including event cascades crossing multiple disciplinary or geographical borders. For an effective role in climate risks assessments, practical guidelines are needed to consistently develop and interpret the storyline event analyses.This paper elaborates on the suitability of physical climate storyline approaches involving climate event induced shocks propagating into societal impacts. It proposes a set of common elements to construct the event storylines. In addition, criteria for their application for climate risk assessment are given, referring to the need for storylines to be physically plausible, relevant for the specific context, and risk-informative.Six examples of varying scope and complexity are presented, all involving the potential climate change impact on European socio-economic sectors induced by remote climate change features occurring far outside the geographical domain of the European mainland. The storyline examples illustrate the application of the proposed storyline components and evaluates the suitability criteria defined in this paper. It thereby contributes to the standardization of the design and application of event-based climate storyline approaches

Parowanie trypletowe w orbitalnie zdegenerowanym modelu sieci Andersona

Niniejsza praca poświęcona jest badaniom nad możliwą teorią uranowych nadprzewodników ferromagnetycznych, która jest oparta na koncepcji parowania trypletowego indukowanego oddziaływaniem wymiennym Hunda. W tym celu, poszukujemy przybliżonych rozwiązań orbitalnie zdegenerowanego modelu sieci Andersona, rozszerzonego o pełny wewnątrz- i międzyorbitalny hamiltonian oddziaływań kulombowskich, które charakteryzowałyby się nieznikającą amplitudą parowania elektronów o tych samych spinach. Wykorzystaną metodą jest wielopasmowe przybliżenie Gutzwillera, które pozwala na ścisłe obliczanie obserwabli dla wariacyjnego stanu podstawowego w granicy nieskończonego przestrzennego wymiaru. Ponadto porównujemy wyniki tego podejścia z rozwiązaniami w przybliżeniu Hartree-Focka, podkreślając istotną rolę korelacji elektronowych, które nie są w tej drugiej metodzie uwzględniane. Dla pewnego zakresu parametrów modelu, dla mniejszego niż połowiczne wypełnienia pasm elektronowych, obserwujemy stabilne rozwiązanie nadprzewodzące, współistniejące z uporządkowaniem ferromagnetycznym. Niemniej jednak rozważany model wymaga dalszej analizy, by móc ilościowo porównać jego przewidywania z konkretnymi wynikami eksperymentalnymi.This thesis is dedicated to the investigation of a possible theory for uranium-based heavy-fermion ferromagnetic superconductors, stemming from the idea of spin-triplet pairing induced by Hund's rule exchange interaction. For this purpose, we look for approximate solutions of the orbitally-degenerate Anderson lattice model, supplemented with full intra- and inter-orbital Coulombic interactions, which admit non-vanishing equal-spin pairing amplitudes. The approximation scheme we use is the multi-band Gutzwiller method, within which observables evaluation for the variational ground-state is exact in the limit of infinite spatial dimensions. We also compare the results of this method to Hartree-Fock solutions, pointing out the essential role of electronic correlations, which are missing in the latter. In a certain region of model parameters and away from half-filling of electronic bands we find stable spin-triplet superconducting phases, coexistent with ferromagnetic order. Nevertheless, the theory still needs further development in order to make a quantitative comparison to experiment possible

Climate impact storylines for assessing socio-economic responses to remote events

Quote: “What I hear, I forget. What I see, I remember. What I do, I understand.” (Xunzi, ∼300 BCE). Modelling complex interactions involving climatic features, socio-economic vulnerability or responses, and long impact transmissions is associated with substantial uncertainty. Physical climate storylines are proposed as an approach to explore complex impact transmission pathways and possible alternative unfoldings of event cascades under future climate conditions. These storylines are particularly useful for climate risk assessment for complex domains, including event cascades crossing multiple disciplinary or geographical borders. For an effective role in climate risks assessments, development guidelines are needed to consistently develop and interpret the storyline event analyses. This paper elaborates on the suitability of physical climate storyline approaches involving climate event induced shocks propagating into societal impacts. It proposes a set of common elements to construct the event storylines. In addition, criteria for their application for climate risk assessment are given, referring to the need for storylines to be physically plausible, relevant for the specific context, and risk-informative. Apart from an illustrative gallery of storyline examples found in literature, three examples of varying scope and complexity are presented in detail, all involving the potential impact on European socio-economic sectors induced by remote climate change features occurring far outside the geographical domain of the European mainland. The storyline examples illustrate the application of the proposed storyline components and evaluate the suitability of the criteria defined in this paper. It thereby contributes to a rigorous design and application of event-based climate storyline approaches.ISSN:2212-096

Climate impact storylines for assessing socio-economic responses to remote events

Quote: “What I hear, I forget. What I see, I remember. What I do, I understand.” (Xunzi, ∼300 BCE). Modelling complex interactions involving climatic features, socio-economic vulnerability or responses, and long impact transmissions is associated with substantial uncertainty. Physical climate storylines are proposed as an approach to explore complex impact transmission pathways and possible alternative unfoldings of event cascades under future climate conditions. These storylines are particularly useful for climate risk assessment for complex domains, including event cascades crossing multiple disciplinary or geographical borders. For an effective role in climate risks assessments, development guidelines are needed to consistently develop and interpret the storyline event analyses. This paper elaborates on the suitability of physical climate storyline approaches involving climate event induced shocks propagating into societal impacts. It proposes a set of common elements to construct the event storylines. In addition, criteria for their application for climate risk assessment are given, referring to the need for storylines to be physically plausible, relevant for the specific context, and risk-informative. Apart from an illustrative gallery of storyline examples found in literature, three examples of varying scope and complexity are presented in detail, all involving the potential impact on European socio-economic sectors induced by remote climate change features occurring far outside the geographical domain of the European mainland. The storyline examples illustrate the application of the proposed storyline components and evaluate the suitability of the criteria defined in this paper. It thereby contributes to a rigorous design and application of event-based climate storyline approaches