A measurement of lifetime differences in the neutral D-meson system

Using a high statistics sample of photoproduced charm particles from the FOCUS experiment at Fermilab, we compare the lifetimes of neutral D mesons decaying via D0 to K- pi+ and K- K+ to measure the lifetime differences between CP even and CP odd final states. These measurements bear on the phenomenology of D0 - D0bar mixing. If the D0 to K-pi+ is an equal mixture of CP even and CP odd eigenstates, we measure yCP = 0.0342 \pm 0.0139 \pm 0.0074.Comment: 15 pages, 5 figure

Search for CP violation in D0 and D+ decays

A high statistics sample of photoproduced charm particles from the FOCUS (E831) experiment at Fermilab has been used to search for CP violation in the Cabibbo suppressed decay modes D+ to K-K+pi+, D0 to K-K+ and D0 to pi-pi+. We have measured the following CP asymmetry parameters: A_CP(K-K+pi+) = +0.006 +/- 0.011 +/- 0.005, A_CP(K-K+) = -0.001 +/- 0.022 +/- 0.015 and A_CP(pi-pi+) = +0.048 +/- 0.039 +/- 0.025 where the first error is statistical and the second error is systematic. These asymmetries are consistent with zero with smaller errors than previous measurements.Comment: 12 pages, 4 figure

Measurements of the Sigma_c^0 and Sigma_c^{++} Mass Splittings

Using a high statistics sample of photoproduced charmed particles from the FOCUS experiment at Fermilab (FNAL-E831), we measure the mass splittings of the charmed baryons Sigma_c^0 and Sigma_c^{++}. We find M(Sigma_c^0 - Lambda_c^+) = 167.38 +/- 0.21 +/- 0.13 MeV/c^2 and M(Sigma_c^++ - Lambda_c^+) = 167.35 +/- 0.19 +/- 0.12 MeV/c^2 with samples of 362 +/- 36 and 461 +/- 39 events, respectively. We measure the isospin mass splitting M(Sigma_c^++ - Sigma_c^0) to be -0.03 +/- 0.28 +/- 0.11 Mev/c^2. The first errors are statistical and the second are systematic.Comment: 10 pages, 2 figure

Evidence for a narrow dip structure at 1.9 GeV/c2^2 in 3π+3π−3\pi^+ 3\pi^- diffractive photoproduction

A narrow dip structure has been observed at 1.9 GeV/c$^2$ in a study of diffractive photoproduction of the $~3\pi^+3\pi^-$ final state performed by the Fermilab experiment E687.Comment: The data of Figure 6 can be obtained by downloading the raw data file e687_6pi.txt. v5 (2nov2018): added Fig. 7, the 6 pion energy distribution as requested by a reade

Reclamation of high residual sodium carbonate water with commercial sulphuric acid for sustainable cropping and soil conservation

A study was carried out in field experimental area of directorate of land reclamation Punjab, Lahore, to investigate the effect of experimentally quantified commercial sulphuric acid (76%) on residual sodium carbonate (RSC) of water, soil quality and crop yield. The findings were clear indications of effectiveness of acid injection approach to treat water. The sulphuric acid application reduced the RSC value of 6.1 to nil by making (T2) slight change in EC of water. This treated water not only improved the soil quality by decreasing its calcareousness from 20 to 17.2 making soil soft while the same increased to 23 in control (T1), where not acid amendment was done. Similarly, SAR of soil was also restricted from an increase by acid treated water rather than the control set of experiment. To make RSC nil, 5.19 liters of sulphuric acids were injected in water for 3 acre inch irrigation. An increase of 16.65% in grain yield of wheat crop was observed upon harvesting in T2, in comparison with control. Ascorbic acid and total phenolic contents (TPC) were also high in T2, followed by T3 and T1. All the changes in soil parameters and crop yield were found statistically significant

Towards a virtual research environment for language and literature researchers

Language and literature researchers use variety of data resources in order to conduct their day-to-day research. Such resources include dictionaries, thesauri, corpora, images, audio and video collections. These resources are typically distributed, and comprise non-interoperable repositories of data that are often license protected. In this context, researchers conduct their research through direct access to individual resources. This form of research is non-scalable, time consuming and often frustrating to the researchers. The JISC funded project Enhancing Repositories for Language and Literature Researchers (ENROLLER, http://www.gla.ac.uk/enroller/) aims to address by provision of an interactive, research infrastructure providing seamless access to major language and literature repositories. This paper describes this infrastructure and the services that have been developed to overcome the issues in access and use of digital resources in humanities. In particular, we describe how high performance computing facilities including the UK e-Science National Grid Service (NGS, http://www.ngs.ac.uk) have been exploited to support advanced, bulk search capabilities, implemented using Google’s MapReduce algorithm. We also describe our experiences in the use of the resource brokering Workload Management System (WMS) and the Virtual Organization Membership Service (VOMS) solutions in this space. Finally we outline the experiences from the arts and humanities community on the usage of this infrastructure

Towards a virtual research environment for language and literature researchers

Language and literature researchers often use a variety of data resources in order to conduct their day-to-day research. Such resources include dictionaries, thesauri, corpora, images, audio and video collections. These resources are typically distributed, and comprise non-interoperable repositories of data that are often licence protected. In this context, researchers typically conduct their research through direct access to individual web-based resources. This form of research is non-scalable, time consuming and often frustrating to the researchers. The JISC funded project Enhancing Repositories for Language and Literature Researchers (ENROLLER, http://www.gla.ac.uk/enroller/) aims to address this by provision of an interactive, research infrastructure providing seamless access to a range of major language and literature repositories. This paper describes this infrastructure and the services that have been developed to overcome the issues in access and use of digital resources in humanities. In particular, we describe how high performance computing facilities including the UK e-Science National Grid Service (NGS, http://www.ngs.ac.uk) have been exploited to support advanced, bulk search capabilities, implemented using Google’s MapReduce algorithm. We also describe our experiences in the use of the resource brokering Workload Management System (WMS) and the Virtual Organization Membership Service (VOMS) solutions in this space. Finally we outline the experiences from the arts and humanities community on the usage of this infrastructure