Estimation of saturation and coherence effects in the KGBJS equation - a non-linear CCFM equation

We solve the modified non-linear extension of the CCFM equation - KGBJS equation - numerically for certain initial conditions and compare the resulting gluon Green functions with those obtained from solving the original CCFM equation and the BFKL and BK equations for the same initial conditions. We improve the low transversal momentum behaviour of the KGBJS equation by a small modification

Kinematical constraint effects in the evolution equations based on angular ordering

We study effects of imposing various forms of the kinematical constraints on the full form of the CCFM equation and its non-linear extension. We find that imposing the constraint in its complete form modifies significantly way the shape of gluon density as compared to forms of the constraint used in the numerical calculations and phenomenological applications. In particular the resulting gluon density is suppressed for large values of hard scale related parameter and kT of gluon. This result might be important in description studies of jet correlations at Large Hadron Collider within CCFM approach.Comment: 11 pages, 11 figure

The Flood Last Time: ‘Muck’ and the uses of history in Kara Walker’s ‘Rumination’ on Katrina

Kara Walker describes her book After the Deluge (2007) as “rumination” on Hurricane Katrina structured in the form of a “visual essay.” The book combines Walker's own artwork and the works of other artists into “a narrative of fluid symbols” in which the overarching analogy of “murky, toxic waters” holds the potential to “become the amniotic fluid of a potentially new and difficult birth.” This essay considers Walker's use of history within this collection of images to show how the book opens up ways to interrogate Katrina's particular significance as a wholly new, and yet eerily familiar, historical “event.” Nuancing a reading of Walker's book with reference to James Baldwin's The Fire Next Time (1963), to which After the Deluge implicitly alludes, the essay examines Walker's artistic challenge to the notion that history is a narratable account of a past that precedes the present and demonstrates how that challenge encourages us to think about the potential uses of history within civil rights discourse after Katrina

Identification of the major cause of endemically poor mobilities in SiC/SiO2 structures

Materials with good carrier mobilities are desired for device applications, but in real devices the mobilities are usually limited by the presence of interfaces and contacts. Mobility degradation at semiconductor-dielectric interfaces is generally attributed to defects at the interface or inside the dielectric, as is the case in Si/SiO2 structures, where processing does not introduce detrimental defects in the semiconductor. In the case of SiC/SiO2 structures, a decade of research focused on reducing or passivating interface and oxide defects, but the low mobilities have persisted. By invoking theoretical results and available experimental evidence, we show that thermal oxidation generates carbon di-interstitial defects inside the semiconductor substrate and that they are a major cause of the poor mobility in SiC/SiO2 structures

Single and double inclusive forward jet production at the LHC at s\sqrt{s} = 7 and 13 TeV

We provide a description of the transverse momentum spectrum of single inclusive forward jets produced at the LHC, at the center-of-mass energies of 7 and 13 TeV, using the high energy factorization (HEF) framework. We subsequently study double inclusive forward jet production and, in particular, we calculate contributions to azimuthal angle distributions coming from double parton scattering. We also compare our results for double inclusive jet production to those obtained with the Pythia Monte Carlo generator. This comparison confirms that the HEF resummation acts like an initial state parton shower. It also points towards the need to include final state radiation effects in the HEF formalism.Comment: 14 pages, 5 figures, version accepted for PL