Tracing a phase transition with fluctuations of the largest fragment size: Statistical multifragmentation models and the ALADIN S254 data

A phase transition signature associated with cumulants of the largest fragment size distribution has been identified in statistical multifragmentation models and examined in analysis of the ALADIN S254 data on fragmentation of neutron-poor and neutron-rich projectiles. Characteristics of the transition point indicated by this signature are weakly dependent on the A/Z ratio of the fragmenting spectator source. In particular, chemical freeze-out temperatures are estimated within the range 5.9 to 6.5 MeV. The experimental results are well reproduced by the SMM model.Comment: 7 pages, 3 figures, Proceedings of the International Workshop on Multifragmentation and Related Topics (IWM2009), Catania, Italy, November 2009

Mass measurement and isoscaling in 124^{124}Sn+Sn and 107^{107}Sn+Sn reactions at 600 AMeV

Isotopic effects in projectile spectator fragmentation at 600 AMeV have been investigated using data collected in recent experiments with SIS beams at the GSI laboratory and with the ALADiN forward-spectrometer. For this purpose, primary beams of 124Sn, as well as secondary beams of 124La and 107Sn produced at the FRS fragment separator have been used. Isoscaling in 124,107Sn+Sn reactions is investigated and results are compared with data taken with the INDRA multidetector for 12C+112,124Sn reactions

Feasibility studies for the measurement of time-like proton electromagnetic form factors from p¯ p→ μ+μ- at P ¯ ANDA at FAIR

This paper reports on Monte Carlo simulation results for future measurements of the moduli of time-like proton electromagnetic form factors, | GE| and | GM| , using the p¯ p→ μ+μ- reaction at P ¯ ANDA (FAIR). The electromagnetic form factors are fundamental quantities parameterizing the electric and magnetic structure of hadrons. This work estimates the statistical and total accuracy with which the form factors can be measured at P ¯ ANDA , using an analysis of simulated data within the PandaRoot software framework. The most crucial background channel is p¯ p→ π+π-, due to the very similar behavior of muons and pions in the detector. The suppression factors are evaluated for this and all other relevant background channels at different values of antiproton beam momentum. The signal/background separation is based on a multivariate analysis, using the Boosted Decision Trees method. An expected background subtraction is included in this study, based on realistic angular distributions of the background contribution. Systematic uncertainties are considered and the relative total uncertainties of the form factor measurements are presented

"Body Horror and Shapeshifting: A Multidisciplinary Exploration "

The body is unveiled, not as a terra incognita, but as terra to be rediscovered. The authors – whose diverse origins echo the multiple media used to convey their ideas – establish a link between bodily metamorphosis and psychological fissures. The body is a locus of paradoxes: deformed, infected, monstrosised or negated but at the same time fascinating, intimate or sensual. Here, readers will open the door of disruption. They will explore the flesh or the inner processes of the body, the idea of its degeneration, even its perception as a gaping wound. The authors in this volume question the very notion of identity as they embark on a journey to reflect on the self. Life itself is a shapeshifting dance we unknowingly join in its myriad of colours and moves

"Body Horror and Shapeshifting: A Multidisciplinary Exploration "

The body is unveiled, not as a terra incognita, but as terra to be rediscovered. The authors – whose diverse origins echo the multiple media used to convey their ideas – establish a link between bodily metamorphosis and psychological fissures. The body is a locus of paradoxes: deformed, infected, monstrosised or negated but at the same time fascinating, intimate or sensual. Here, readers will open the door of disruption. They will explore the flesh or the inner processes of the body, the idea of its degeneration, even its perception as a gaping wound. The authors in this volume question the very notion of identity as they embark on a journey to reflect on the self. Life itself is a shapeshifting dance we unknowingly join in its myriad of colours and moves