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1. 2,4-Disubstituted pyridine derivatives are effective against intracellular and biofilm-forming tubercle bacilli

Author

M. Korycka-Machała, M. Kawka, J. Lach, R. Płocińska, A. Bekier, B. Dziadek, A. Brzostek, P. Płociński, D. Strapagiel, M. Szczesio, K. Gobis, and J. Dziadek

Subjects
pyridine derivatives, tuberculosis, drug resistance, Mtb inhibitors, MmpR5, biofilm, Therapeutics. Pharmacology, RM1-950
Abstract

It was recently reported that 4-substituted picolinohydrazonamides carrying hydrophilic cyclic amines, such as morpholine and pyrrolidine, at the end of their thiosemicarbazide chain have potent antimycobacterial activity in vitro at concentrations below 1 μg/ml. Here, two selected compounds, 2,4-disubstituted pyridine derivatives 11 and 15, revealed significant bactericidal activity against Mycobacterium tuberculosis localized intracellularly within human macrophages, as well as against biofilm-forming tubercle bacilli. Mutants were selected that were resistant to the investigated compounds at an efficiency similar to that identified in the presence of the first line antituberculosis drug rifampicin. The resistant mutants were viable in the presence of the tested compounds exclusively on solid media. Genome-wide sequencing of the mutants selected in the presence of compound 11 revealed the accumulation of nonsynonymous mutations in the mmpR5 gene encoding a transcriptional repressor of the MmpS5-MmpL5 efflux pump, whose upregulation has been associated with bedaquiline resistance. The depletion of MmpR5 in wild-type M. tuberculosis using CRISPR–Cas9 technology increased the resistance of this strain to compound 11. Mass spectrometry-based proteomics (LC–MS/MS) of wild-type tubercle bacilli growing in subinhibitory concentrations of compounds 11 or 15 revealed 15 overproduced proteins not detectable in the control cells, including virulence-related proteins.

Published
2022
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2. The transverse momentum dependence of charged kaon Bose–Einstein correlations in the SELEX experiment

Author

G.A. Nigmatkulov, A.K. Ponosov, U. Akgun, G. Alkhazov, J. Amaro-Reyes, A. Asratyan, A.G. Atamantchouk, A.S. Ayan, M.Y. Balatz, A. Blanco-Covarrubias, N.F. Bondar, P.S. Cooper, L.J. Dauwe, G.V. Davidenko, U. Dersch, A.G. Dolgolenko, G.B. Dzyubenko, R. Edelstein, L. Emediato, A.M.F. Endler, J. Engelfried, I. Eschrich, C.O. Escobar, N. Estrada, A.V. Evdokimov, I.S. Filimonov, A. Flores-Castillo, F.G. Garcia, I. Giller, V.L. Golovtsov, P. Gouffon, E. Gülmez, M. Iori, S.Y. Jun, M. Kaya, J. Kilmer, V.T. Kim, L.M. Kochenda, I. Konorov, A.P. Kozhevnikov, A.G. Krivshich, H. Krüger, M.A. Kubantsev, V.P. Kubarovsky, A.I. Kulyavtsev, N.P. Kuropatkin, V.F. Kurshetsov, A. Kushnirenko, J. Lach, L.G. Landsberg, I. Larin, E.M. Leikin, G. López-Hinojosa, T. Lungov, V.P. Maleev, D. Mao, P. Mathew, M. Mattson, V. Matveev, E. McCliment, M.A. Moinester, V.V. Molchanov, A. Morelos, A.V. Nemitkin, P.V. Neoustroev, C. Newsom, A.P. Nilov, S.B. Nurushev, A. Ocherashvili, Y. Onel, S. Ozkorucuklu, A. Penzo, S.V. Petrenko, M. Procario, V.A. Prutskoi, B.V. Razmyslovich, D.A. Romanov, V.I. Rud, J. Russ, J.L. Sánchez-López, A.A. Savchenko, J. Simon, G.V. Sinev, A.I. Sitnikov, V.J. Smith, M. Srivastava, V. Steiner, V. Stepanov, L. Stutte, M. Svoiski, V.V. Tarasov, N.K. Terentyev, I. Torres, L.N. Uvarov, A.N. Vasiliev, D.V. Vavilov, E. Vázquez-Jáuregui, V.S. Verebryusov, V.A. Victorov, V.E. Vishnyakov, A.A. Vorobyov, K. Vorwalter, J. You, and R. Zukanovich-Funchal

Subjects
Correlation femtoscopy, HBT intensity interferometry, Kaon–kaon interactions, Bose–Einstein correlations, Physics, QC1-999
Abstract

We report the measurement of the one-dimensional charged kaon correlation functions using 600GeV/c Σ−, π− and 540GeV/c p beams from the SELEX (E781) experiment at the Fermilab Tevatron. K±K± correlation functions are studied for three transverse pair momentum, kT, ranges and parameterized by a Gaussian form. The emission source radii, R, and the correlation strength, λ, are extracted. The analysis shows a decrease of the source radii with increasing kaon transverse pair momentum for all beam types.

Published
2016
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3. Ground vibration measurements for Fermilab future collider projects

Author

B. Baklakov, T. Bolshakov, A. Chupyra, A. Erokhin, P. Lebedev, V. Parkhomchuk, Sh. Singatulin, J. Lach, and V. Shiltsev

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

This article presents results of wideband seismic measurements at the Fermilab site, namely, in the tunnel of the Tevatron and on the surface nearby, as well as in two deep tunnels in the Illinois dolomite, thought to be a possible geological environment of the Fermilab future accelerators.

Published
1998
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4. The recovery of metals as high value powders and nanopowders from industrial wastewaters using potential-controlled electrolysis

Author

S. Luchcińska, J. Lach, K. Wróbel, A. Łukomska, and P. Łoś

Subjects
Environmental Engineering, Environmental Chemistry, General Agricultural and Biological Sciences
Abstract

The objective of the presented study was the recovery of Zn, Cr, Cu and Co in the form of powders and nanopowders from various types of industrial wastewaters. Powders and nanopowders as products of high added value find a wide applications in nanotechnology and material science and engineering. The metallic powders were obtained using potentiostatic electroreduction (potential-controlled electrolysis). The chosen method offers better control of the purity and structure of the products. The structure and size of crystallites depend on the value of electrolysis potentials and time, cathode material, concentrations of metal ions. In this investigation, the powders of different sizes ranging from 90 to 230 nm for Cr, 100–4000 nm for Zn, 25–100 nm for Co and 40–660 nm for Cu were deposited. The compositions, purity and size of the cathode deposits were confirmed by scanning electron microscopy and energy-dispersive X-ray spectroscopy. Presented metal recovery method is a promising technique for industrial application, given its simplicity, economic viability and environmental sustainability. It can be used on a wide range of solutions and help in reducing the problem of the growing amounts of industrial wastewater.

Published
2022
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5. WRF-Comfort: simulating microscale variability in outdoor heat stress at the city scale with a mesoscale model

Author

A. Martilli, N. Nazarian, E. S. Krayenhoff, J. Lachapelle, J. Lu, E. Rivas, A. Rodriguez-Sanchez, B. Sanchez, and J. L. Santiago

Subjects
Geology, QE1-996.5
Abstract

Urban overheating and its ongoing exacerbation due to global warming and urban development lead to increased exposure to urban heat and increased thermal discomfort and heat stress. To quantify thermal stress, specific indices have been proposed that depend on air temperature, mean radiant temperature (MRT), wind speed, and relative humidity. While temperature and humidity vary on scales of hundreds of meters, MRT and wind speed are strongly affected by individual buildings and trees and vary on the meter scale. Therefore, most numerical thermal comfort studies apply microscale models to limited spatial domains (commonly representing urban neighborhoods with building blocks) with resolutions on the order of 1 m and a few hours of simulation. This prevents the analysis of the impact of city-scale adaptation and/or mitigation strategies on thermal stress and comfort. To solve this problem, we develop a methodology to estimate thermal stress indicators and their subgrid variability in mesoscale models – here applied to the multilayer urban canopy parameterization BEP-BEM within the Weather Research and Forecasting (WRF) model. The new scheme (consisting of three main steps) can readily assess intra-neighborhood-scale heat stress distributions across whole cities and for timescales of minutes to years. The first key component of the approach is the estimation of MRT in several locations within streets for different street orientations. Second, mean wind speed and its subgrid variability are downscaled as a function of the local urban morphology based on relations derived from a set of microscale LES and RANS simulations across a wide range of realistic and idealized urban morphologies. Lastly, we compute the distributions of two thermal stress indices for each grid square, combining all the subgrid values of MRT, wind speed, air temperature, and absolute humidity. From these distributions, we quantify the high and low tails of the heat stress distribution in each grid square across the city, representing the thermal diversity experienced in street canyons. In this contribution, we present the core methodology as well as simulation results for Madrid (Spain), which illustrate strong differences between heat stress indices and common heat metrics like air or surface temperature both across the city and over the diurnal cycle.

Published
2024
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6. Historia akumulatora ołowiowo-kwasowego

Author

J. Lach, Andrzej Czerwiński, J. Wróbel, and K. Wróbel

Subjects
Engineering, Waste management, business.industry, General Chemical Engineering, General Chemistry, Lead–acid battery, business
Published
2018
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7. Long term stability study at FNAL and SLAC using BINP developed hydrostatic level system

Author

S. Singatulin, A. Chupyra, A. Erokhin, D. Plant, M. Kondaurov, Vladimir Shiltsev, E. Shubin, A. Seryi, A. Medvedko, V. V. Parkhomchuk, R. Ruland, J. Lach, and A. Kuznetsov

Subjects
Physics, Ground motion, Stability study, business.industry, Particle accelerator, Stability (probability), Term (time), law.invention, Nuclear physics, law, Aerospace engineering, Hydrostatic equilibrium, Collider, business, Motion measurement
Abstract

Long term ground stability is essential for achieving the performance goals of the Next Linear Collider. To characterize ground motion on relevant time scales, measurements have been performed at three geologically different locations using a hydrostatic level system developed specifically for these studies. Comparative results from the different sites are presented in this paper.

Published
2016

8. First observation of the Cabibbo-suppressed decays Ξc+→Σ+π−π+ and Ξc+→Σ−π+π+ and measurement of their branching ratios

Author

P. Mathew, I. Eschrich, P. S. Cooper, C. R. Newsom, Vincent J Smith, A.G. Dolgolenko, K. D. Nelson, A. Lamberto, Nikolay Terentyev, M. Mattson, G. F. Rappazzo, I. Giller, D. V. Vavilov, I. Konorov, T. Lungov, S. Y. Jun, E. Vázquez-Jáuregui, J. Kilmer, M. Procario, Victor Kim, Lev Uvarov, A. P. Nilov, G.V. Davidenko, J. Amaro-Reyes, P. Gouffon, M. A. Kubantsev, M. Gaspero, G. B. Dzyubenko, R. M. Edelstein, A. Blanco-Covarrubias, R. Zukanovich-Funchal, Ugur Akgun, Mithat Kaya, E. J. Ramberg, M. Srivastava, Chensheng Mao, Wenheng Zhao, J. Simon, James Russ, H. Krü, Erhan Gülmez, E. McCliment, I. Torres, E. M. Leikin, V. P. Maleev, J. M. You, V. A. Prutskoi, Victor Golovtsov, Zhenlin Mao, A. I. Kulyavtsev, A.V. Nemitkin, P. Schiavon, V. I. Rud, C.O. Escobar, B. V. Razmyslovich, N. Estrada, A. Morelos, L. M. Kochenda, F. G. Garcia, S. B. Nurushev, G. Alkhazov, Shuchen Zheng, L. Stutte, J.L. Sánchez-López, V. S. Verebryusov, V. V. Molchanov, A. G. Krivshich, Murray Moinester, L. J. Dauwe, M. Luksys, L.G. Landsberg, D. Skow, V. P. Kubarovsky, Aldo Penzo, Suat Ozkorucuklu, U. Dersch, I. Larin, A. Kushnirenko, Jürgen Engelfried, N. P. Kuropatkin, Yasar Onel, A. P. Kozhevnikov, Andrey Vasiliev, A. I. Sitnikov, M. Svoiski, V. A. Victorov, J. Lach, K. Vorwalter, A. A. Vorobyov, Kangling He, V. Stepanov, V. F. Kurshetsov, S. V. Petrenko, I.S. Filimonov, A. V. Evdokimov, Viktor Matveev, M. Iori, Nikolay Bondar, G. P. Thomas, P. Pogodin, L. Emediato, A. Ocherashvili, V. E. Vishnyakov, A.G. Atamantchouk, Ahmet S. Ayan, P. V. Neoustroev, E. Ozel, Yunshan Li, D. Mao, G. Ló, V. Steiner, Simon Kwan, M.Y. Balatz, and A. M. F. Endler

Subjects
Nuclear physics, Physics, Charmed baryons, Nuclear and High Energy Physics, 010308 nuclear & particles physics, 0103 physical sciences, Fermilab, Atomic physics, 010306 general physics, Branching (polymer chemistry), 01 natural sciences
Abstract

We report the first observation of two Cabibbo-suppressed decay modes, Ξ c + → Σ + π − π + and Ξ c + → Σ − π + π + . We observe 59 ± 14 over a background of 87, and 22 ± 8 over a background of 13 events, respectively, for the signals. The data were accumulated using the SELEX spectrometer during the 1996–1997 fixed target run at Fermilab, chiefly from a 600 GeV / c Σ − beam. The branching ratios of the decays relative to the Cabibbo-favored Ξ c + → Ξ − π + π + are measured to be B ( Ξ c + → Σ + π − π + ) / B ( Ξ c + → Ξ − π + π + ) = 0.48 ± 0.20 , and B ( Ξ c + → Σ − π + π + ) / B ( Ξ c + → Ξ − π + π + ) = 0.18 ± 0.09 , respectively. We also report branching ratios for the same decay modes of the Λ c + relative to Λ c + → p K − π + .

Published
2008
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9. The transverse momentum dependence of charged kaon Bose-Einstein correlations in the SELEX experiment

Author

J. M. You, V.V. Tarasov, V. E. Vishnyakov, L. Stutte, P. V. Neoustroev, U. Dersch, A.K. Ponosov, Victor Kim, J.L. Sánchez-López, R. M. Edelstein, A. Blanco-Covarrubias, M. A. Kubantsev, V. A. Prutskoi, I. Konorov, J. Amaro-Reyes, Nikolay Bondar, P. S. Cooper, J. Lach, A. A. Vorobyov, Victor Maleev, A. Kushnirenko, P. Mathew, A. I. Sitnikov, L. Emediato, I.S. Filimonov, A. M. F. Endler, A. Morelos, Ugur Akgun, C. R. Newsom, I. Eschrich, N. P. Kuropatkin, Nikolay Terentyev, M. Mattson, V. Steiner, V. I. Rud, Erhan Gülmez, V. S. Verebryusov, V. Matveev, G.V. Davidenko, A. G. Krivshich, G. Nigmatkulov, D.A. Romanov, M. Svoiski, V. A. Victorov, I. Giller, Victor Golovtsov, D. Mao, E. Vázquez-Jáuregui, A. Ocherashvili, Lev Uvarov, Jürgen Engelfried, T. Lungov, S. Y. Jun, N. Estrada, Vincent J Smith, Murray Moinester, L. G. Landsberg, A. Evdokimov, D. V. Vavilov, Ahmet S. Ayan, A.G. Dolgolenko, A.V. Nemitkin, A. Flores-Castillo, M.Y. Balatz, A. P. Nilov, G. Lopez-Hinojosa, F. G. Garcia, V. F. Kurshetsov, B. V. Razmyslovich, A.G. Atamantchouk, S. B. Nurushev, Aldo Penzo, S. V. Petrenko, L. J. Dauwe, H. Krüger, Suat Ozkorucuklu, A. P. Kozhevnikov, Andrey Vasiliev, V. V. Molchanov, A.A. Savchenko, A. Asratyan, J. Kilmer, P. Gouffon, Mithat Kaya, E. McCliment, I. Torres, R. Zukanovich-Funchal, A. I. Kulyavtsev, E. M. Leikin, L. M. Kochenda, M. Procario, K. Vorwalter, M. Iori, M. Srivastava, James Russ, V. Stepanov, G. Alkhazov, V. P. Kubarovsky, G. B. Dzyubenko, C. O. Escobar, Yasar Onel, J. Simon, I. Larin, and G.V. Sinev

Subjects
Nuclear and High Energy Physics, Particle physics, Kaluza–Klein theory, Tevatron, FOS: Physical sciences, 01 natural sciences, Bose–Einstein correlations, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Correlation femtoscopy, Physics, Kaon–kaon interactions, 010308 nuclear & particles physics, Sigma, HBT intensity interferometry, Charged particle, lcsh:QC1-999, Correlation function (statistical mechanics), Transverse momentum, High Energy Physics::Experiment, Beam (structure), lcsh:Physics
Abstract

We report on the measurement of the one-dimensional charged kaon correlation functions using 600~GeV/{\it c} $\Sigma^-$, $\pi^-$ and 540~GeV/{\it c} $p$ beams from the SELEX~(E781) experiment at the Fermilab Tevatron. $K^{\pm}K^{\pm}$ correlation functions are studied for three transverse pair momentum, $k_T$, ranges and parameterized by a Gaussian form. The emission source radii, $R$, and the correlation strength, $\lambda$, are extracted. The analysis shows a decrease of the source radii with increasing kaon transverse pair momentum for all beam types., Comment: 8 pages, 4 figures, 1 table

Published
2015

10. Confirmation of the doubly charmed baryon Ξcc+(3520) via its decay to pD+K−

Author

J. Amaro-Reyes, P. Mathew, G.V. Davidenko, Ugur Akgun, I. Eschrich, Andrey Vasiliev, V. I. Rud, M. Iori, I. Giller, A. I. Kulyavtsev, P. Gouffon, C.O. Escobar, E. J. Ramberg, L. Stutte, V. E. Vishnyakov, Vincent J Smith, A.G. Dolgolenko, A. M. F. Endler, Mao Zhenlin, P. Schiavon, J. M. You, M. Procario, J. Lach, A. A. Vorobyov, V. F. Kurshetsov, Ahmet S. Ayan, R. M. Edelstein, S. V. Petrenko, A. P. Nilov, I.S. Filimonov, P. S. Cooper, A. G. Krivshich, Suat Ozkorucuklu, C. R. Newsom, A.V. Nemitkin, F. G. Garcia, S. B. Nurushev, D. Skow, P. V. Neoustroev, M. Srivastava, A. V. Evdokimov, Viktor Matveev, A. P. Kozhevnikov, D. V. Vavilov, G. F. Rappazzo, E. Ozel, E. Vázquez-Jáuregui, Li Yunshan, Lev Uvarov, James Russ, A. Ocherashvili, Zhao Wenheng, Zheng Shuchen, S. Y. Jun, B. V. Razmyslovich, Erhan Gülmez, A.G. Atamantchouk, V. S. Verebryusov, L. J. Dauwe, I. Konorov, V. Stepanov, Victor Kim, U. Dersch, A. Lamberto, G. Alkhazov, M. A. Kubantsev, Nikolay Terentyev, M. Mattson, V. P. Kubarovsky, A. I. Sitnikov, Aldo Penzo, Yasar Onel, He Kangling, M. Gaspero, I. Larin, K. D. Nelson, K. Vorwalter, Mithat Kaya, E. McCliment, I. Torres, J. Simon, A. Morelos, P. Pogodin, L. M. Kochenda, Mao Chensheng, J. Kilmer, R. Zukanovich-Funchal, E. M. Leikin, D. Mao, V. Steiner, Simon Kwan, M.Y. Balatz, V. P. Maleev, Victor Golovtsov, A. Kushnirenko, N. P. Kuropatkin, V. V. Molchanov, M. Luksys, L.G. Landsberg, G. B. Dzyubenko, V. A. Prutskoi, H. Krüger, Jürgen Engelfried, M. Svoiski, V. A. Victorov, T. Lungov, Murray Moinester, Nikolay Bondar, G. P. Thomas, and L. Emediato

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Gaussian, State (functional analysis), Poisson distribution, 01 natural sciences, Nuclear physics, Charmed baryons, Baryon, symbols.namesake, 0103 physical sciences, symbols, Fermilab, Charm (quantum number), 010306 general physics
Abstract

We observe a signal for the doubly charmed baryon Ξ c c + in the decay mode Ξ c c + → p D + K − to complement the previous reported decay Ξ c c + → Λ c + K − π + in data from SELEX, the charm hadroproduction experiment at Fermilab. In this new decay mode we observe an excess of 5.62 events over a combinatoric background estimated by event mixing to be 1.38 ± 0.13 events. The mixed background has Gaussian statistics, giving a signal significance of 4.8σ. The Poisson probability that a background fluctuation can produce the apparent signal is less than 6.4 × 10 −4 . The observed mass of this state is 3518 ± 3 MeV / c 2 , consistent with the published result. Averaging the two results gives a mass of 3518.7 ± 1.7 MeV / c 2 . The observation of this new weak decay mode confirms the previous SELEX suggestion that this state is a double charm baryon. The relative branching ratio for these two modes is 0.36 ± 0.21 .

Published
2005
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11. Upper limit on the decay Σ(1385)−→Σ−γ and cross section for γΣ−→Λπ−

Author

E. J. Ramberg, P. Gouffon, A. I. Sitnikov, V. V. Molchanov, M. Gaspero, G.V. Davidenko, M. Iori, P. Mathew, M. Zielinski, M. Luksys, L.G. Landsberg, J. M. You, G. B. Dzyubenko, I. Eschrich, A. P. Nilov, Mithat Kaya, P. S. Cooper, Zhenlin Mao, Simon Kwan, E. McCliment, F. G. Garcia, C. R. Newsom, S. B. Nurushev, I. Giller, A. Lamberto, Aldo Penzo, M.Y. Balatz, Nikolay Terentyev, M. Mattson, A. Morelos, L. M. Kochenda, J. Lach, A. A. Vorobyov, K. D. Nelson, L. Stutte, Thomas Ferbel, V. E. Vishnyakov, C.O. Escobar, A. Ocherashvili, G. F. Rappazzo, C. Hammer, V. Steiner, Chensheng Mao, J. Kilmer, B. V. Razmyslovich, A. M. F. Endler, T. Lungov, L. J. Dauwe, D. V. Vavilov, Lev Uvarov, K. Vorwalter, R. M. Edelstein, P. Pogodin, Shuchen Zheng, V. Stepanov, V. P. Maleev, A. V. Evdokimov, Viktor Matveev, M. A. Kubantsev, V. I. Rud, D. Mao, Victor Golovtsov, V. A. Mukhin, M. Procario, A. I. Kulyavtsev, Murray Moinester, D. Casey, Wenheng Zhao, J. Simon, R. Zukanovich-Funchal, E. M. Leikin, Z. H. Zhu, Victor Kim, M. Srivastava, Suat Ozkorucuklu, James Russ, Yasar Onel, Vincent J Smith, P. Schiavon, A. P. Kozhevnikov, P. V. Neoustroev, A.G. Dolgolenko, M. Svoiski, V. A. Victorov, Andrey Vasiliev, I.S. Filimonov, G. Alkhazov, Kangling He, A. Kushnirenko, E. Ozel, A.V Nemitkin, V. A. Prutskoi, N. P. Kuropatkin, Nikolay Bondar, V. P. Kubarovsky, G. P. Thomas, L. Emediato, A. G. Krivshich, Jürgen Engelfried, Yunshan Li, I. Konorov, I. Larin, V. F. Kurshetsov, H. Krüger, S. V. Petrenko, D. Skow, A.G. Atamantchouk, S. Y. Jun, Erhan Gülmez, V. S. Verebryusov, U. Dersch, and Patrick Slattery

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Hyperon, Radiative decay, Sigma, Lambda, 01 natural sciences, Nuclear physics, Formalism (philosophy of mathematics), 0103 physical sciences, Pi, Fermilab, 010306 general physics, Primakoff effect
Abstract

Coherent Λπ− production on Pb of 600 GeV Σ− hyperons has been studied with the SELEX facility at Fermilab. Using the Primakoff formalism, we set a 90% CL upper limit on the radiative decay width Γ[Σ(1385)−→Σ−γ] s ≈1.385 GeV to be 56±16 μb.

Published
2004
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12. Production asymmetry of Ds from 600 GeV/c Σ− and π− beam

Author

G. B. Dzyubenko, Murray Moinester, V. A. Prutskoi, A.G. Atamantchouk, K. D. Nelson, V. V. Molchanov, M. Luksys, L.G. Landsberg, E. J. Ramberg, Shuchen Zheng, A. V. Evdokimov, Viktor Matveev, P. Gouffon, A. Kushnirenko, A. P. Nilov, P. Schiavon, M. Gaspero, H. Krüger, R. M. Edelstein, N. P. Kuropatkin, D. V. Vavilov, G. Alkhazov, P. S. Cooper, Vincent J Smith, A. M. F. Endler, C. R. Newsom, A.G. Dolgolenko, Kangling He, A. G. Krivshich, P. V. Neoustroev, Wenheng Zhao, F. G. Garcia, J. Simon, V. P. Kubarovsky, G. F. Rappazzo, I. Konorov, V. E. Vishnyakov, S. B. Nurushev, P. Mathew, Yasar Onel, E. Ozel, V. P. Maleev, Chensheng Mao, I. Eschrich, M. Procario, Lev Uvarov, Suat Ozkorucuklu, Victor Golovtsov, B. V. Razmyslovich, Zhenlin Mao, S. Y. Jun, Victor Kim, L. J. Dauwe, A. Lamberto, Nikolay Terentyev, M. Mattson, A. P. Kozhevnikov, M. Srivastava, Erhan Gülmez, I. Giller, R. Zukanovich-Funchal, D. Mao, K. Vorwalter, E. M. Leikin, Mithat Kaya, J. M. You, James Russ, C.O. Escobar, Yunshan Li, V. S. Verebryusov, D. Skow, E. McCliment, M. Svoiski, V. A. Victorov, A. Ocherashvili, L. Stutte, U. Dersch, A. I. Kulyavtsev, A. Morelos, I. Larin, L. M. Kochenda, Nikolay Bondar, G. P. Thomas, Simon Kwan, J. Lach, A. A. Vorobyov, V. Stepanov, M. A. Kubantsev, L. Emediato, V. I. Rud, M. Iori, M.Y. Balatz, P. Pogodin, V. F. Kurshetsov, S. V. Petrenko, V. Steiner, I.S. Filimonov, J. Kilmer, G.V. Davidenko, Andrey Vasiliev, A.V Nemitkin, Jürgen Engelfried, T. Lungov, Aldo Penzo, A. I. Sitnikov, Ball State University, Bogazici University, Carnegie-Mellon University, Centro Brasileiro de Pesquisas Físicas, Fermi National Accelerator Laboratory, Institute for High Energy Physics, Institute of High Energy Physics, Institute of Theoretical and Experimental Physics, Max-Planck-Institut für Kernphysik, Moscow State University, Petersburg Nuclear Physics Institute, Tel Aviv University, Universidad Autónoma de San Luis Potosí, Universidade Federal da Paraíba (UFPB), University of Bristol, University of Iowa, University of Michigan-Flint, University of Rome 'La Sapienza' and INFN, Universidade de São Paulo (USP), University of Trieste and INFN, Infinion, Imperial College, Universidade Estadual de Campinas (UNICAMP), Kafkas University, Technische Universität München, The Boston Consulting Group, Universidade Estadual Paulista (UNESP), Lucent Technologies, SPSS Inc., University of Alabama at Birmingham, DOE, Solidum, Siemens Medizintechnik, and Deutsche Bank AG

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, media_common.quotation_subject, High Energy Physics::Phenomenology, Function (mathematics), 01 natural sciences, Asymmetry, High Energy Physics - Experiment, Nuclear physics, 0103 physical sciences, Physics::Accelerator Physics, Interval (graph theory), High Energy Physics::Experiment, Production (computer science), 010306 general physics, Beam (structure), media_common
Abstract

The production of $D_s^-$ relative to $D_s^+$ as a function of $x_F $ with 600 GeV/c $\Sigma^-$ beam is measured in the interval $0.15 < x_F < 0.7$ by the SELEX (E781) experiment at Fermilab. The integrated charge asymmetries with 600 GeV/c $\Sigma^-$ beam ($0.53\pm0.06$) and $\pi^-$ beam ($0.06\pm0.11$) are also compared. The results show the $\Sigma^-$ beam fragments play a role in the production of $D_s^-$, as suggested by the leading quark model., Comment: 11 pages, 5 figures, submitted to Physics Letter B

Published
2003
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13. Measurement of the Σ− charge radius by Σ−–electron elastic scattering

Author

I Eschrich, H Krüger, J Simon, K Vorwalter, G Alkhazov, A.G Atamantchouk, M.Y Balatz, N.F Bondar, P.S Cooper, L.J Dauwe, G.V Davidenko, U Dersch, G Dirkes, A.G Dolgolenko, G.B Dzyubenko, R Edelstein, L Emediato, A.M.F Endler, J Engelfried, C.O Escobar, A.V Evdokimov, I.S Filimonov, F.G Garcia, M Gaspero, I Giller, V.L Golovtsov, P Gouffon, E Gülmez, Kangling He, M Iori, S.Y Jun, M Kaya, J Kilmer, V.T Kim, L.M Kochenda, K Königsmann, I Konorov, A.P Kozhevnikov, A.G Krivshich, M.A Kubantsev, V.P Kubarovsky, A.I Kulyavtsev, N.P Kuropatkin, V.F Kurshetsov, A Kushnirenko, S Kwan, J Lach, A Lamberto, L.G Landsberg, I Larin, E.M Leikin, Yunshan Li, M Luksys, T Lungov, V.P Maleev, D Mao, Chensheng Mao, Zhenlin Mao, S Masciocchi, P Mathew, M Mattson, V Matveev, E McCliment, M.A Moinester, V.V Molchanov, A Morelos, K.D Nelson, A.V Nemitkin, P.V Neoustroev, C Newsom, A.P Nilov, S.B Nurushev, A Ocherashvili, Y Onel, E Ozel, S Ozkorucuklu, A Penzo, S.V Petrenko, P Pogodin, B Povh, M Procario, V.A Prutskoi, E Ramberg, G.F Rappazzo, B.V Razmyslovich, V.I Rud, J Russ, Y Scheglov, P Schiavon, A.I Sitnikov, D Skow, V.J Smith, M Srivastava, V Steiner, V Stepanov, L Stutte, M Svoiski, N.K Terentyev, G.P Thomas, L.N Uvarov, A.N Vasiliev, D.V Vavilov, V.S Verebryusov, V.A Victorov, V.E Vishnyakov, A.A Vorobyov, J You, Wenheng Zhao, Shuchen Zheng, R Zukanovich-Funchal, Ball State University, Bogazici University, Carnegie-Mellon University, Centro Brasiliero de Pesquisas Físicas, Fermilab, Institute for High Energy Physics, Institute of High Energy Physics, Institute of Theoretical and Experimental Physics, Max-Planck-Institut für Kernphysik, Moscow State University, Petersburg Nuclear Physics Institute, Tel Aviv University, Universidad Autónoma de San Luis Potosó, Universidade Federal da Paraiba, University of Bristol, University of Iowa, University of Michigan-Flint, University of Rome 'La Sapienza' and INFN, University of SãoPaulo, University of Trieste and INFN, Imperial College, Boston Consulting Group, Siemens Medizintechnik, Deutsche Bank AG, Infineon Technologies AG, University of Karlsruhe, Universidade Estadual de Campinas (UNICAMP), Universität Freiburg, Technische Universität München, Lucent Technologies, Universidade Estadual Paulista (UNESP), Max-Planck-Institut fur Physik, SPSS Inc., University of Alabama at Birmingham, and DOE

Subjects
Physics, Elastic scattering, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, Proton, 010308 nuclear & particles physics, Strong interaction, Hadron strong and electromagnetic radii, Hyperon, Hyperons, Radius, Electron, 01 natural sciences, Hadron-induced elastic scattering at high energy, Electromagnetic form factors, Charge radius, 0103 physical sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract

Made available in DSpace on 2022-04-28T19:55:23Z (GMT). No. of bitstreams: 0 Previous issue date: 2001-12-13 The σ- mean squared charge radius has been measured in the space-like Q2 range 0.035-0.105 GeV2/c2 by elastic scattering of a σ- beam off atomic electrons. The measurement was performed with the SELEX (E781) spectrometer using the Fermilab hyperon beam at a mean energy of 610 GeV/c. We obtain (rch2σ- = (0.61 ± 0.12(stat.) ± 0.09(syst.)) fm2. The proton and π- charge radii were measured as well and are consistent with results of other experiments. Our result agrees with the recently measured strong interaction radius of the σ-. © 2001 Elsevier Science B.V. All rights reserved. Ball State University, Muncie, IN 47306 Bogazici University, Bebek 80815 Istanbul Carnegie-Mellon University, Pittsburgh, PA 15213 Centro Brasiliero de Pesquisas Físicas, Rio de Janeiro Fermilab, Batavia, IL 60510 Institute for High Energy Physics, Protvino Institute of High Energy Physics, Beijing Institute of Theoretical and Experimental Physics, Moscow Max-Planck-Institut für Kernphysik, 69117 Heidelberg Moscow State University, Moscow Petersburg Nuclear Physics Institute, St. Petersburg Tel Aviv University, 69978 Ramat Aviv Universidad Autónoma de San Luis Potosó, San Luis Potosi Universidade Federal da Paraiba, Paraíba University of Bristol, Bristol BS8 1TL University of Iowa, IA City, IA 52242 University of Michigan-Flint, Flint, MI 48502 University of Rome 'La Sapienza' and INFN, Rome University of SãoPaulo, São Paulo University of Trieste and INFN, Trieste Imperial College, London SW7 2BZ Boston Consulting Group, Munchen Siemens Medizintechnik, Erlangen Deutsche Bank AG, Eschborn Infineon Technologies AG, München University of Karlsruhe, Karlsruhe Instituto de Fisica da Universidade Estadual de Campinas UNICAMP, SP Universität Freiburg, Freiburg Physik-Department Technische Universität München, Garching Lucent Technologies, Naperville, IL Instituto de Física Teórica da Universidade Estadual Paulista, São Paulo Max-Planck-Institut fur Physik, Munchen SPSS Inc., Chicago, IL University of Alabama at Birmingham, Birmingham, AL 35294, London DOE, Germantown, MD Instituto de Física Teórica da Universidade Estadual Paulista, São Paulo

Published
2001
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14. Precision Measurements of theΛc+andD0Lifetimes

Author

A. P. Nilov, Suat Ozkorucuklu, T. Lungov, S. Y. Jun, A. P. Kozhevnikov, M. Procario, J. Kilmer, R. Zukanovich-Funchal, M. Iori, E. M. Leikin, M. Srivastava, A. M. F. Endler, P. Pogodin, A. I. Kulyavtsev, Victor Kim, Murray Moinester, James Russ, V. E. Vishnyakov, He Kangling, L. Stutte, Mao Zhenlin, P. S. Cooper, M. A. Kubantsev, C. R. Newsom, Yasar Onel, V. A. Prutskoi, M. E. Mattson, A. Lamberto, G. F. Rappazzo, G. Alkhazov, Andrey Vasiliev, Nikolay Terentyev, P. Mathew, Lev Uvarov, I. Eschrich, P. V. Neoustroev, E. Ozel, K. Vorwalter, Victor Maleev, V. Steiner, Zhao Wenheng, Mao Chensheng, Zheng Shuchen, A. Kushnirenko, Aldo Penzo, D. Mao, A. Evdokimov, D. V. Vavilov, P. Gouffon, I. Giller, N. P. Kuropatkin, E. J. Ramberg, Jürgen Engelfried, V. P. Kubarovsky, Simon Kwan, G. B. Dzyubenko, M. Gaspero, A. Morelos, M.Y. Balatz, K. D. Nelson, A. I. Sitnikov, E. McCliment, A.V. Nemitkin, Victor Golovtsov, A. Ocherashvili, H. Krüger, A.G. Atamantchouk, S. B. Nurushev, U. Dersch, Nikolay Bondar, R. M. Edelstein, G. P. Thomas, V. I. Rud, L. M. Kochenda, L. Emediato, V. F. Kurshetsov, S. V. Petrenko, L. G. Landsberg, C. O. Escobar, Li Yunshan, D. Skow, J. Lach, A. A. Vorobyov, J. Simon, V. Stepanov, I.S. Filimonov, I. Larin, Erhan Gülmez, B. V. Razmyslovich, L. J. Dauwe, V. S. Verebryusov, V. Matveev, M. Svoiski, V. A. Victorov, F. G. Garcia, Vincent J Smith, A.G. Dolgolenko, J. M. You, G.V. Davidenko, I. Konorov, Mehmet Kaya, V. V. Molchanov, M. Luksys, P. Schiavon, and A. G. Krivshich

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Maximum likelihood, Monte Carlo method, General Physics and Astronomy, Elementary particle, Lambda, Lambda baryon, 01 natural sciences, 7. Clean energy, 3. Good health, 0103 physical sciences, Charm (quantum number), Fermilab, 010306 general physics
Abstract

We report new precision measurements of the lifetimes of the {Lambda}{sup +}{sub c} and D{sup 0} from SELEX, the charm hadroproduction experiment at Fermilab. Based upon 1630 {Lambda}{sup +}{sub c} and 10210 D{sup 0} decays we observe lifetimes of {tau}[{Lambda}{sup +}{sub c}]=198.1{+-} 7.0{+-}5.6 fs and {tau}[D{sup 0}]=407.9{+-}6.0{+-}4 .3 fs .

Published
2001
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15. Total cross section measurements with π− , Σ− and protons on nuclei and nucleons around

Author

U. Dersch, N. Akchurin, V.A. Andreev, A.G. Atamantchouk, M. Aykac, M.Y. Balatz, N.F. Bondar, A. Bravar, P.S. Cooper, L.J. Dauwe, G.V. Davidenko, G. Dirkes, A.G. Dolgolenko, D. Dreossi, G.B. Dzyubenko, R. Edelstein, L. Emediato, A.M.F. Endler, J. Engelfried, I. Eschrich, C.O. Escobar, A.V. Evdokimov, I.S. Filimonov, F.G. Garcia, M. Gaspero, S. Gerzon, I. Giller, V.L. Golovtsov, Y.M. Goncharenko, E. Gottschalk, P. Gouffon, O.A. Grachov, E. Gülmez, He Kangling, M. Iori, S.Y. Jun, A.D. Kamenskii, M. Kaya, J. Kilmer, V.T. Kim, L.M. Kochenda, K. Königsmann, I. Konorov, A.P. Kozhevnikov, A.G. Krivshich, H. Krüger, M.A. Kubantsev, V.P. Kubarovsky, A.I. Kulyavtsev, N.P. Kuropatkin, V.F. Kurshetsov, A. Kushnirenko, S. Kwan, J. Lach, A. Lamberto, L.G. Landsberg, I. Larin, E.M. Leikin, Li Yunshan, Li Zhigang, M. Luksys, T. Lungov, D. Magarrel, V.P. Maleev, D. Mao, Mao Chensheng, Mao Zhenlin, S. Masciocchi, P. Mathew, M. Mattson, V. Matveev, E. McCliment, S.L. McKenna, M.A. Moinester, V.V. Molchanov, A. Morelos, V.A. Mukhin, K.D. Nelson, A.V. Nemitkin, P.V. Neoustroev, C. Newsom, A.P. Nilov, S.B. Nurushev, A. Ocherashvili, G. Oleynik, Y. Onel, E. Ozel, S. Ozkorucuklu, S. Patrichev, A. Penzo, S.I. Petrenko, P. Pogodin, B. Povh, M. Procario, V.A. Prutskoi, E. Ramberg, G.F. Rapazzo, B.V. Razmyslovich, V.I. Rud, J. Russ, Y. Scheglov, P. Schiavon, V.K. Semyatchkin, J. Simon, A.I. Sitnikov, D. Skow, V.J. Smith, M. Srivastava, V. Steiner, V. Stepanov, L. Stutte, M. Svoiski, N.K. Terentyev, G.P. Thomas, L.N. Uvarov, A.N. Vasiliev, D.V. Vavilov, V.S. Verebryusov, V.A. Victorov, V.E. Vishnyakov, A.A. Vorobyov, K. Vorwalter, J. You, Zhao Wenheng, Zheng Shuchen, and R. Zukanovich-Funchal

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Nuclear Theory, chemistry.chemical_element, Sigma, 7. Clean energy, 01 natural sciences, Copper, respiratory tract diseases, Nuclear physics, Momentum, Cross section (physics), chemistry, 0103 physical sciences, High Energy Physics::Experiment, Fermilab, Beryllium, Nuclear Experiment, 010306 general physics, Nucleon, Carbon
Abstract

Total cross sections for Sigma- and pi- on beryllium, carbon, polyethylene and copper as well as total cross sections for protons on beryllium and carbon have been measured in a broad momentum range around 600GeV/c. These measurements were performed with a transmission technique adapted to the SELEX hyperon-beam experiment at Fermilab. We report on results obtained for hadron-nucleus cross sections and on results for sigma_tot(Sigma- N) and sigma_tot(pi- N), which were deduced from nuclear cross sections.

Published
2000
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16. Observation of the Cabibbo-Suppressed DecayΞc+→pK−π+

Author

S. Y. Jun, N. Akchurin, V. A. Andreev, A. G. Atamantchouk, M. Aykac, M. Y. Balatz, N. F. Bondar, A. Bravar, P. S. Cooper, L. J. Dauwe, G. V. Davidenko, U. Dersch, A. G. Dolgolenko, D. Dreossi, G. B. Dzyubenko, R. Edelstein, L. Emediato, A. M. F. Endler, J. Engelfried, I. Eschrich, C. O. Escobar, A. V. Evdokimov, I. S. Filimonov, F. G. Garcia, M. Gaspero, S. Gerzon, I. Giller, V. L. Golovtsov, Y. M. Goncharenko, E. Gottschalk, P. Gouffon, O. A. Grachov, E. Gülmez, M. Iori, A. D. Kamenski, H. Kangling, M. Kaya, J. Kilmer, V. T. Kim, L. M. Kochenda, K. Königsmann, I. Konorov, A. A. Kozhevnikov, A. G. Krivshich, H. Krüger, M. A. Kubantsev, V. P. Kubarovsky, A. I. Kulyavtsev, N. P. Kuropatkin, V. F. Kurshetsov, A. Kushnirenko, S. Kwan, J. Lach, A. Lamberto, L. G. Landsberg, I. Larin, E. M. Leikin, M. Luksys, T. Lungov, D. Magarrel, V. P. Maleev, D. Mao, S. Masciocchi, P. Mathew, M. Mattson, V. Matveev, E. McCliment, S. L. McKenna, M. A. Moinester, V. V. Molchanov, A. Morelos, V. A. Mukhin, K. D. Nelson, A. V. Nemitkin, P. V. Neoustroev, C. Newsom, A. P. Nilov, S. B. Nurushev, A. Ocherashvili, G. Oleynik, Y. Onel, E. Ozel, S. Ozkorucuklu, S. Patrichev, A. Penzo, S. I. Petrenko, P. Pogodin, B. Povh, M. Procario, V. A. Prutskoi, E. Ramberg, G. F. Rappazzo, B. V. Razmyslovich, V. I. Rud, J. Russ, P. Schiavon, V. K. Semyatchkin, J. Simon, A. I. Sitnikov, D. Skow, V. J. Smith, M. Srivastava, V. Steiner, V. Stepanov, L. Stutte, M. Svoiski, N. K. Terentyev, G. P. Thomas, L. N. Uvarov, A. N. Vasiliev, D. V. Vavilov, V. S. Verebryusov, V. A. Victorov, V. E. Vishnyakov, A. A. Vorobyov, K. Vorwalter, Z. Wenheng, J. You, L. Yunshan, M. Zhenlin, L. Zhigang, and R. Zukanovich Funchal

Subjects
Physics, Meson, 010308 nuclear & particles physics, Stereochemistry, Branching fraction, General Physics and Astronomy, 01 natural sciences, Xi baryon, Sigma baryon, Nuclear physics, Baryon, Charmed baryons, Particle decay, 0103 physical sciences, Pi, 010306 general physics
Abstract

We report the first observation of the Cabibbo-suppressed charm baryon decay Xi(+)(c)-->pK(-)pi(+). We observe 150+/-22+/-5 events for the signal. The data were accumulated using the SELEX spectrometer during the 1996-1997 fixed target run at Fermilab, chiefly from a 600 GeV/c Sigma(-) beam. The branching fractions of the decay relative to the Cabibbo-favored Xi(+)(c)-->Sigma+K-pi(+) and Xi(+)(c)-->Xi(-)pi(+)pi(+) are measured to be B(Xi(+)(c)-->pK(-)pi(+))/B(Xi(+)(c)-->Sigma+K-pi(+)) = 0.22+/-0. 06+/-0.03 and B(Xi(+)(c)-->pK(-)pi(+))/B(Xi(+)(c)-->Xi(-)pi(+)pi(+)) = 0.20+/-0.04+/-0.02, respectively.

Published
2000
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17. ptandxFdependence of the polarization ofΣ+hyperons produced by 800 GeV/cprotons

Author

A. Morelos, I. F. Albuquerque, N. F. Bondar, R. Carrigan, D. Chen, P. S. Cooper, Dai Lisheng, A. S. Denisov, A. V. Dobrovolsky, T. Dubbs, A. M. F. Endler, C. O. Escobar, M. Foucher, V. L. Golovtsov, H. Gottschalk, P. Gouffon, V. T. Grachev, A. V. Khanzadeev, M. A. Kubantsev, N. P. Kuropatkin, J. Lach, null Lang Pengfei, V. N. Lebedenko, null Li Chengze, null Li Yunshan, M. Luksys, J. R. P. Mahon, E. McCliment, C. Newsom, M. C. Pommot Maia, V. M. Samsonov, V. A. Schegelsky, null Shi Huanzhang, V. J. Smith, Tang Fukun, N. K. Terentyev, S. Timm, I. I. Tkatch, L. N. Uvarov, A. A. Vorobyov, null Yan Jie, Zhao Wenheng, null Zheng Shuchen, and null Zhong Yuanyuan

Subjects
Physics, Nuclear physics, Hyperon, Sigma, Nuclear Experiment, Polarization (waves), Lambda
Abstract

We utilize the angle and momentum resolution of our apparatus to study the polarization of 375 GeV/c Sigma(+) hyperons produced by 800 GeV/c protons incident on a Cu target. By examining in detail two of our high statistics data samples, we find evidence for structure in the p(t) dependence of Sigma(+) polarization and are able to extract the x(F) dependence of the Sigma(+) polarization and compare it with x(F) behavior in the Lambda(0) and Xi(-) systems.

Published
1995
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18. Measuring the magnetic moments of short-lived particles using channeling in bent crystals

Author

P. S. Cooper, S. Timm, N. K. Terentyev, D. Chen, D.C. Daniels, A. A. Vorobyov, R.A. Carrigan, V.M. Samsonov, M.N. Strikhanov, V. V. Baublis, A. Khanzadeev, J. Lach, A. Morelos, Vincent J Smith, and C.R. Sun

Subjects
Physics, Nuclear and High Energy Physics, Magnetic moment, media_common.quotation_subject, Bent molecular geometry, Hyperon, Asymmetry, Baryon, Nuclear physics, Precession, Charm (quantum number), Nuclear Experiment, Instrumentation, Spin-½, media_common
Abstract

A recent demonstration of spin precession using channeling in a bent crystal offers the interesting possibility of a technique to measure magnetic moments of short-lived charm baryons. There are significant differences among theoretical models of these moments. Accumulating experimental evidence indicates the tools used for hyperon magnetic moment measurements, polarized production and decay asymmetries, may also be available with heavier baryons. Useful measurements may be possible using the channeling technique but they will require challenging beam conditions.

Published
1994
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19. Measurement of the branching ratio for theΞ−→Σ−γ radiative decay

Author

Yan Jie, Dai Lisheng, Shi Huanzhang, Lang Pengfei, D. Chen, M. C. Pommot Maia, A. V. Dobrovolsky, M. Luksys, J. R. P. Mahon, N. K. Terentyev, E. McCliment, Tang Fukun, A. M. F. Endler, H. Gottschalk, A. V. Khanzadeev, N. F. Bondar, V.A. Schegelsky, A. A. Vorobyov, Zhong Yuanyuan, P. S. Cooper, M. A. Kubantsev, M. Foucher, A. Morelos, J. Lach, P. Gouffon, A. S. Denisov, C. R. Newsom, I. F. Albuquerque, S. Timm, L. N. Uvarov, Zhao Wenheng, Li Yunshan, Zheng Shuchen, N. P. Kuropatkin, V. T. Grachev, Li Chengze, I. I. Tkatch, T. Dubbs, Carlos Escobar, R. Carrigan, Vincent J Smith, V. L. Golovtsov, and V. M. Samsonov

Subjects
Physics, Baryon, Particle physics, Particle decay, Branching fraction, Hadron, Hyperon, General Physics and Astronomy, Lambda, Xi baryon, Sigma baryon
Abstract

We have measured the branching ratio for the hyperon radiative decay [Xi][sup [minus]][r arrow][Sigma][sup [minus]][gamma] from a sample of 211[plus minus]33 events obtained in the polarized 375 GeV/[ital c] charged hyperon beam at Fermilab. We find [ital B]([Xi][sup [minus]][r arrow][Sigma][sup [minus]][gamma]/[Xi][sup [minus]][r arrow][Lambda][sup 0][pi][sup [minus]])=(1.22[plus minus]0.23[plus minus]0.06)[times]10[sup [minus]4] where the quoted errors are statistical and systematic, respectively. We have also obtained an indication that the sign of the asymmetry parameter of this decay is positive.

Published
1994
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20. Analysis of fracture mechanism of cast steel under hydrostatic pressure

Author

J. Lachowski and J. Borowiecka-Jamrozek

Subjects
cast steel, heat treatment, metallography, mechanical properties, computer modelling, Mining engineering. Metallurgy, TN1-997
Abstract

Plastic deformation and damage evolution in low-carbon cast steel containing non-metallic inclusions are analyzed experimentally and numerically. The cast steel was subjected to the heat treatment: normalizing, oil quenching and tempering. Tests were carried out at hydrostatic pressure of 500 MPa and 1 000 MPa. In the tensile test the tensile strength, elongation and reduction of area were examined. Fractography of the specimens was carried out to observe fracture mechanisms. The finite elements method has been used for modelling of deformation of the specimens. The computer simulation was performed using ABAQUS system. The computed output was compared with experimental results

Published
2022

21. Measurement of the magnetic moments of theΣ+and Σ¯−hyperons

Author

N. P. Kuropatkin, V. T. Grachev, P. Gouffon, I. F. Albuquerque, M. Foucher, Lang Pengfei, Carlos Escobar, Tkatch, V. M. Samsonov, L. N. Uvarov, A. V. Dobrovolsky, Dai Lisheng, Li Chengze, Li Yunshan, E. McCliment, A. S. Denisov, M. Luksys, V.A. Schegelsky, N. K. Terentyev, P. S. Cooper, R.A. Carrigan, C. R. Newsom, S. Timm, A. Morelos, Zhong Yuanyuan, M. A. Kubantsev, N. F. Bondar, Shi Huanzhang, An.A. Vorobyov, T. Dubbs, J. Lach, Pommot Maia Mc, Tang Fukun, A. M. F. Endler, H. Gottschalk, Alexei Khanzadeev, D Chen, Zhao Wenheng, Zheng Shuchen, V. L. Golovtsov, Vincent J Smith, Yan Jie, and Mahon

Subjects
Baryon, Physics, Antiparticle, Proton, Magnetic moment, CPT symmetry, General Physics and Astronomy, Sigma, High Energy Physics::Experiment, Fermion, Statistical physics, Atomic physics, Sigma baryon
Abstract

We have measured the magnetic moments of the SIGMA+ and SIGMABAR- hyperons produced by 800-GeV protons incident on a Cu target. We determine the SIGMA+ magnetic moment to be (2.4613 +/- 0.0034 +/- 0.0040)mu(N) where the uncertainties are statistical and systematic, respectively. In this first measurement we determine the magnetic moment of the SIGMABAR- to be -(2.428 +/- 0.036 +/- 0.007)mu(N). The magnetic moments of the SIGMA+ and SIGMABAR- are consistent with each other in magnitude but opposite in sign as required by CPT invariance.

Published
1993
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22. Ground-state phase diagram of the Falicov-Kimball model

Author

J Lach, J Jedrzejewski, and R Lyzwa

Subjects
Physics, Grand canonical ensemble, Condensed matter physics, Lattice (order), Electron, Flory–Huggins solution theory, Ground state, CALPHAD, Phase diagram, Ion
Abstract

The two-state spinless Falicov-Kimball model on a one-dimensional lattice is studied by means of well-controlled numerical procedures. Restricted phase diagrams in the grand-canonical ensemble and at zero temperature are constructed. The evolution of these phase diagrams, as the interaction parameter U is varied, along with the band structures corresponding to configurations of localized particles (ions) and densities of mobile particles (electrons), is monitored. The changes observed enable us to draw conclusions for the complete phase diagram and to make a qualitative plot of such a diagram.

Published
1993
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23. Polarization ofΣ+and Σ¯−hyperons produced by 800-GeV/cprotons

Author

P. Gouffon, M. Foucher, M. Luksys, V.A. Schegelsky, A. V. Dobrovolsky, Li Yunshan, Zhao Wenheng, Zheng Shuchen, I. I. Tkatch, Lang Pengfei, Yan Jie, Vincent J Smith, J. Lach, N. P. Kuropatkin, V. T. Grachev, J. R. P. Mahon, Tang Fukun, A. M. F. Endler, Dai Lisheng, H. Gottschalk, Shi Huanzhang, A. A. Vorobyov, N. K. Terentyev, A. V. Khanzadeev, M. A. Kubantsev, A. S. Denisov, V. M. Samsonov, E. McCliment, A. Morelos, S. Timm, R.A. Carrigan, Zhong Yuanyuan, D Chen, T. Dubbs, V. L. Golovtsov, I. F. Albuquerque, Li Chengze, L. N. Uvarov, M. C. Pommot Maia, N. F. Bondar, Carlos Escobar, P. S. Cooper, and C. R. Newsom

Subjects
Physics, Hyperon, General Physics and Astronomy, Sigma, High Energy Physics::Experiment, Elementary particle, Atomic physics, Nuclear Experiment, Polarization (waves), Sigma baryon
Abstract

We have measured the polarization of 375-GeV/c SIGMA+ and SIGMABAR- hyperons produced by 800-GeV/c protons incident on a Cu target. We find that the SIGMA+ polarization rises with increasing p(t) to a maximum of 16% at p(t) = 1.0 GeV/c and then decreases to 10% at p(t) = 1.8 GeV/c. We compare this SIGMA+ polarization with data at lower energies. The SIGMABAR- polarization has been measured for the first time. It has the same sign as the SIGMA+ but smaller magnitude in a similar kinematical region.

Published
1993
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24. Global Structure of the Falicov-Kimball Model Ground State Phase Diagram

Author

J. Lach, J. Jędrzejewski, and R. Łyżwa

Subjects
Physics, Grand canonical ensemble, Condensed matter physics, Electronic correlation, Lattice (order), General Physics and Astronomy, Electron, Flory–Huggins solution theory, Ground state, Phase diagram, Ion
Abstract

The two-state spinless Falicov-Kimball model on a one-dimensional lattice is studied by means of well-controlled numerical procedures. Restricted phase diagrams in the grand-canonical ensemble and at zero temperature are constructed. The evolution of these phase diagrams, as the interaction parameter U is varied, including the band structures corresponding to configurations of localized particles (ions) and densities of mobile particles (electrons), is monitored. The changes observed enable us to draw conclusions for the global structure of the phase diagram and to make a qualitative plot of such a diagram. Particular attention is paid to the possibility of conductor-insulator transitions. The results obtained suggest that the system is an insulator for all U only if the electron and ion densities pc, p; satisfy the conditions: pe+ pi =1, 'pi 1/2|< δ < 4. For all other pairs (Pc , pi) there is a critical U at which the system undergoes a conductor—insulator transition. PACS numbers: 75.30.Mb, 71.30.+h

Published
1993
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25. First observation of magnetic moment precession of channeled particles in bent crystals

Author

A. Morelos, Wh Zhao, J. Yan, Vl Golovtsov, Av Khanzadeev, Ma Kubantsev, S. Timm, Av Dobrovolsky, Nf Bondar, If Albuquerque, C. R. Newsom, Ln Uvarov, Pf Lang, Aa Vorobyov, Vv Baublis, J. R. P. Mahon, Tang Fukun, A. M. F. Endler, Co Escobar, Yy Zhong, Vn Lebedenko, H. Gottschalk, Sc Zheng, Vm Samsonov, Np Kuropatkin, P. Gouffon, Vj Smith, Vt Grachev, T. Dubbs, Cr Sun, Ps Cooper, Ls Dai, Nk Terentyev, Cz Li, Va Schegelsky, Pa Goritchev, Hz Shi, J. Lach, D Chen, M. Foucher, Mcp Maia, Ys Li, Ra Carrigan, As Denisov, E. McCliment, and Tkatch

Subjects
Physics, Nuclear physics, Magnetic moment, Bent molecular geometry, Precession, General Physics and Astronomy, Elementary particle, Fermion, Atomic physics, Spin (physics), Sigma baryon, Magnetic field
Abstract

Spin precession of channeled particles in bent crystals has been observed for the first time. Polarized SIGMA+ were channeled using bent Si crystals. These crystals provided an effective magnetic field of 45 T which resulted in a measured spin precession of 60-degrees +/- 17-degrees. This agrees with the prediction of 62-degrees +/- 2-degrees using the world average of SIGMA+ magnetic moment measurements. This new technique gives a SIGMA+ magnetic moment of (2.40 +/- 0.46 +/- 0.40),mu(N), where the quoted uncertainties are statistical and systematic, respectively. We see no evidence of depolarization in the channeling process.

Published
1992
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26. Measurement of the asymmetry parameter in the hyperon radiative decayΣ+→pγ

Author

A. V. Dobrovolsky, A. Morelos, Lang Pengfei, Tang Fukun, A. M. F. Endler, A. A. Vorobyov, H. Gottschalk, M. A. Kubantsev, Pommot Maia Mc, Lebedenko Vn, Goritchev Pa, Zhao Wenheng, Zheng Shuchen, I. F. Albuquerque, A. S. Denisov, E. McCliment, Li Yunshan, T. Dubbs, Carlos Escobar, N. K. Terentyev, R.A. Carrigan, L. N. Uvarov, M. Foucher, M. Luksys, Li Chengze, S. Timm, Tkatch, V. M. Samsonov, A. V. Khanzadeev, Kuropatkin Np, P. Gouffon, V. L. Golovtsov, J. Lach, N. F. Bondar, Zhong Yuanyuan, Mahon, V. T. Grachev, Shi Huanzhang, Vincent J Smith, D. Chen, Yan Jie, Dai Lisheng, P. S. Cooper, and C. R. Newsom

Subjects
Physics, Nuclear physics, Baryon, Particle physics, Particle decay, Hadron, Hyperon, General Physics and Astronomy, High Energy Physics::Experiment, Elementary particle, Fermion, Charged particle, Sigma baryon
Abstract

We have measured the asymmetry parameter (${\mathrm{\ensuremath{\alpha}}}_{\ensuremath{\gamma}}$) in the hyperon radiative decay ${\mathrm{\ensuremath{\Sigma}}}^{+}$\ensuremath{\rightarrow}p\ensuremath{\gamma} with a sample of 34 754\ifmmode\pm\else\textpm\fi{}212 events obtained in a polarized charged hyperon beam experiment at Fermilab. We find ${\mathrm{\ensuremath{\alpha}}}_{\ensuremath{\gamma}}$=-0.720\ifmmode\pm\else\textpm\fi{}0.086\ifmmode\pm\else\textpm\fi{}0.045, where the quoted errors are statistical and systematic, respectively.

Published
1992
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28. SBFS - steganography based file system

Author

J. Lach

Subjects
File system, Steganography tools, business.industry, Computer science, Computer file, Stub file, Device file, computer.file_format, computer.software_genre, Torrent file, Design rule for Camera File system, Self-certifying File System, Information hiding, Journaling file system, Embedded system, Data file, Steganographic file system, business, computer, Computer network
Abstract

This paper presents the idea of file system that is built on top of image library using steganography techniques. In this solution user is allowed to select arbitrary set of images that are used as covers for hiding not only single portion of data but a whole file system which can contain several data files. The file system is dedicated for mobile devices such as smart phones which equipped with digital cameras often store large image libraries. Those can be successfully used for hiding sensitive data. As long as steganography technique used for hiding the existence of the file system stays secure the solutionpsilas characteristic feature is plausible deniability since the user can deny its existence.

Published
2008
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30. Polarization ofΣ+hyperons produced by 800 GeV/c protons on Cu and Be

Author

A. V. Evdokimov, Viktor Matveev, Zhenlin Mao, E. G. de Oliveira, V. E. Vishnyakov, P. Schiavon, A. Morelos, D. Skow, U. Dersch, A. G. Krivshich, M. A. Kubantsev, V. I. Rud, G. B. Dzyubenko, I. Konorov, Andrey Vasiliev, E. J. Ramberg, A. Lamberto, P. Gouffon, Nikolay Terentyev, P. V. Neoustroev, V. F. Kurshetsov, S. V. Petrenko, Erhan Gülmez, Aldo Penzo, A.V. Nemitkin, P. S. Cooper, E. Ozel, C. O. Escobar, C. R. Newsom, M. E. Mattson, S. B. Nurushev, V. S. Verebryusov, Murray Moinester, G. F. Rappazzo, A. M. F. Endler, Lev Uvarov, V. A. Prutskoi, D. V. Vavilov, A. I. Sitnikov, A. P. Nilov, Victor Kim, M. Procario, A. I. Kulyavtsev, V. P. Maleev, Victor Golovtsov, A. Ocherashvili, J. Kilmer, L. Stutte, Kangling He, R. Zukanovich-Funchal, M. Srivastava, E. M. Leikin, James Russ, A. Kushnirenko, Nikolay Bondar, Vincent J Smith, A.G. Dolgolenko, Yushan Li, Jürgen Engelfried, G. P. Thomas, N. P. Kuropatkin, T. Lungov, S. Y. Jun, L. Emediato, G. Alkhazov, M. Iori, P. Pogodin, J. M. You, R. M. Edelstein, B. V. Razmyslovich, Chensheng Mao, A. P. Kozhevnikov, P. Mathew, I. Eschrich, V. V. Molchanov, V. P. Kubarovsky, V. Steiner, I. Giller, M. Luksys, L.G. Landsberg, L. J. Dauwe, A.G. Atamantchouk, Mehmet Kaya, S. Ozkurucuklu, V. Stepanov, Shuchen Zheng, G.V. Davidenko, J. Lach, A. A. Vorobyov, I.S. Filimonov, Simon Kwan, M.Y. Balatz, D. Mao, K. Vorwalter, E. McCliment, Yasar Onel, L. M. Kochenda, M. Gaspero, I. Larin, K. D. Nelson, Wenheng Zhao, J. Simon, H. Krüger, M. Svoiski, V. A. Victorov, and F. G. Garcia

Subjects
Physics, Nuclear and High Energy Physics, Proton radiation, Quantitative Biology::Neurons and Cognition, Hyperon, Atomic physics, Polarization (waves)
Abstract

We show that ${\ensuremath{\Sigma}}^{+}$ hyperons produced by 800 GeV/c protons on targets of Be and Cu have significant polarizations (15--20%). These polarizations persist at values of ${p}_{t}\ensuremath{\approx}2\text{ }\text{ }\mathrm{G}\mathrm{e}\mathrm{V}/\mathrm{c}$ and a wide range of ${x}_{F}$. The polarizations from the Cu target are consistently less than from Be. The average ratio of the ${\ensuremath{\Sigma}}^{+}$ polarization from Cu to that from Be is $0.68\ifmmode\pm\else\textpm\fi{}0.08$.

Published
2004
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31. Observation of a Narrow Charm-Strange MesonDsJ+(2632)→Ds+ηandD0K+

Author

M. Iori, G. B. Dzyubenko, I. Konorov, P. Pogodin, M. Svoiski, V. A. Victorov, Murray Moinester, Jürgen Engelfried, V. V. Molchanov, T. Lungov, S. Y. Jun, M. Luksys, C. O. Escobar, Simon Kwan, L.G. Landsberg, J. Lach, A. A. Vorobyov, A. I. Sitnikov, A. P. Nilov, H. Krüger, M.Y. Balatz, I. Larin, F. G. Garcia, U. Dersch, J. Kilmer, G.V. Davidenko, A. V. Evdokimov, Viktor Matveev, I.S. Filimonov, K. D. Nelson, P. S. Cooper, C. R. Newsom, Li Yunshan, A. I. Kulyavtsev, V. F. Kurshetsov, R. Zukanovich-Funchal, S. V. Petrenko, E. J. Ramberg, E. M. Leikin, M. E. Mattson, G. F. Rappazzo, Vincent J Smith, A.G. Dolgolenko, Mao Zhenlin, B. V. Razmyslovich, A. Lamberto, K. Vorwalter, V. E. Vishnyakov, E. Vázquez-Jáuregui, Lev Uvarov, J. Simon, L. J. Dauwe, J. M. You, Aldo Penzo, V. P. Maleev, Nikolay Terentyev, Yasar Onel, A.G. Atamantchouk, Mehmet Kaya, Victor Golovtsov, P. Schiavon, A. M. F. Endler, A. Ocherashvili, Suat Ozkorucuklu, M. Gaspero, D. Skow, A. Morelos, P. Gouffon, Nikolay Bondar, G. P. Thomas, Mao Chensheng, A. P. Kozhevnikov, E. McCliment, I. Torres, Ugur Akgun, Erhan Gülmez, A. G. Krivshich, L. Emediato, A.V. Nemitkin, D. Mao, He Kangling, Andrey Vasiliev, M. A. Kubantsev, V. I. Rud, D. V. Vavilov, L. M. Kochenda, V. S. Verebryusov, S. B. Nurushev, A. Kushnirenko, N. P. Kuropatkin, Victor Kim, G. Alkhazov, V. P. Kubarovsky, M. Procario, L. Stutte, M. Srivastava, James Russ, V. Stepanov, P. Mathew, I. Eschrich, V. Steiner, I. Giller, R. M. Edelstein, Ahmet S. Ayan, P. V. Neoustroev, E. Ozel, Zhao Wenheng, Zheng Shuchen, and J. Amaro-Reyes

Subjects
Physics, Particle physics, Meson, 010308 nuclear & particles physics, Branching fraction, General Physics and Astronomy, 01 natural sciences, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Fermilab, Charm (quantum number), Nuclear Experiment, 010306 general physics
Abstract

We report the first observation of a charm-strange meson D(+)(sJ)(2632) at a mass of 2632.5+/-1.7 MeV/c(2) in data from SELEX, the charm hadro-production experiment E781 at Fermilab. This state is seen in two decay modes, D(+)(s)eta and D0K+. In the D(+)(s)eta decay mode we observe a peak with 101 events over a combinatoric background of 54.9 events at a mass of 2635.4+/-3.3 MeV/c(2). There is a corresponding peak of 21 events over a background of 6.9 at 2631.5+/-2.0 MeV/c(2) in the decay mode D0K+. The decay width of this state is

Published
2004
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32. Heterogeneous redundancy for fault and defect tolerance with complexity independent area overhead

Author

J. Lach and Vinu Vijay Kumar

Subjects
Very-large-scale integration, business.industry, Computer science, Logic family, Fault tolerance, Hardware_PERFORMANCEANDRELIABILITY, Logic synthesis, Computer architecture, Embedded system, Software fault tolerance, Datapath, Redundancy (engineering), business, Logic optimization
Abstract

The continuous increase in digital system complexity is raising the area cost of redundancy-based fault and defect tolerance. This paper introduces a technique for heterogeneous redundancy in control path and datapath circuitry that provides high reliability with area overhead that is independent of system complexity. Small amounts of circuit-specific reconfigurable logic are finely integrated with fixed-logic circuitry to provide fine-grained heterogeneous fault and defect tolerance. Results reveal that the technique is effective for a variety of circuits, providing high reliability with a constant magnitude area overhead that is independent of system complexity.

Published
2004
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33. Fine-grained self-healing hardware for large-scale autonomic systems

Author

J. Lach and Vinu Vijay Kumar

Subjects
Triple modular redundancy, business.industry, Computer science, Self-healing, Embedded system, Software fault tolerance, Redundancy (engineering), business, Fault detection and isolation, Computer hardware, Electronic circuit
Abstract

The hardware redundancy costs required for self-healing systems increase with system complexity, creating concerns about the cost-feasibility of large-scale autonomic systems. Redundancy costs can be minimized without reducing reliability by providing finest-grained fault recovery, but modern redundancy techniques are not effective for sub-component-level recovery. This paper introduces a design technique for low-cost, fine-grained self-healing hardware. Small amounts of reconfigurable logic are integrated within primarily fixed-logic circuits to provide heterogeneous redundancy for efficient fine-grained, self-contained fault detection, diagnosis, and recovery. When combined with traditional coarse-grained recovery techniques for larger failures, this technique enables large-scale self-healing systems with reduced redundancy costs.

Published
2004
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34. Observation of a narrow charm-strange meson D-sJ(+)(2632)-> D-s(+)eta and (DK+)-K-0

Author

A V, Evdokimov, U, Akgun, G, Alkhazov, J, Amaro-Reyes, A G, Atamantchouk, A S, Ayan, M Y, Balatz, N F, Bondar, P S, Cooper, L J, Dauwe, G V, Davidenko, U, Dersch, A G, Dolgolenko, G B, Dzyubenko, R, Edelstein, L, Emediato, A M F, Endler, J, Engelfried, I, Eschrich, C O, Escobar, I S, Filimonov, F G, Garcia, M, Gaspero, I, Giller, V L, Golovtsov, P, Gouffon, E, Gülmez, He, Kangling, M, Iori, S Y, Jun, M, Kaya, J, Kilmer, V T, Kim, L M, Kochenda, I, Konorov, A P, Kozhevnikov, A G, Krivshich, H, Krüger, M A, Kubantsev, V P, Kubarovsky, A I, Kulyavtsev, N P, Kuropatkin, V F, Kurshetsov, A, Kushnirenko, S, Kwan, J, Lach, A, Lamberto, L G, Landsberg, I, Larin, E M, Leikin, Li, Yunshan, M, Luksys, T, Lungov, V P, Maleev, D, Mao, Mao, Chensheng, Mao, Zhenlin, P, Mathew, M, Mattson, V, Matveev, E, McCliment, M A, Moinester, V V, Molchanov, A, Morelos, K D, Nelson, A V, Nemitkin, P V, Neoustroev, C, Newsom, A P, Nilov, S B, Nurushev, A, Ocherashvili, Y, Onel, E, Ozel, S, Ozkorucuklu, A, Penzo, S V, Petrenko, P, Pogodin, M, Procario, E, Ramberg, G F, Rappazzo, B V, Razmyslovich, V I, Rud, J, Russ, P, Schiavon, J, Simon, A I, Sitnikov, D, Skow, V J, Smith, M, Srivastava, V, Steiner, V, Stepanov, L, Stutte, M, Svoiski, N K, Terentyev, G P, Thomas, I, Torres, L N, Uvarov, A N, Vasiliev, D V, Vavilov, E, Vázquez-Jáuregui, V S, Verebryusov, V A, Victorov, V E, Vishnyakov, A A, Vorobyov, K, Vorwalter, J, You, Zhao, Wenheng, Zheng, Shuchen, and R, Zukanovich-Funchal

Abstract

We report the first observation of a charm-strange meson D(+)(sJ)(2632) at a mass of 2632.5+/-1.7 MeV/c(2) in data from SELEX, the charm hadro-production experiment E781 at Fermilab. This state is seen in two decay modes, D(+)(s)eta and D0K+. In the D(+)(s)eta decay mode we observe a peak with 101 events over a combinatoric background of 54.9 events at a mass of 2635.4+/-3.3 MeV/c(2). There is a corresponding peak of 21 events over a background of 6.9 at 2631.5+/-2.0 MeV/c(2) in the decay mode D0K+. The decay width of this state is17 MeV/c(2) at 90% confidence level. The relative branching ratio Gamma(D0K+)/Gamma(D(+)(s)eta) is 0.14+/-0.06. The mechanism that keeps this state narrow is unclear. Its decay pattern is also unusual, being dominated by the D(+)(s)eta decay mode.

Published
2004

35. NETSS: a networked environment for testing suspicious software

Author

M. Sulcoski, M.W. Ashburn, and J. Lach

Subjects
Web server, business.industry, Computer science, computer.software_genre, Computer security, World Wide Web, Software, Virtual machine, Network service, Software design, Malware, The Internet, Software system, business, computer
Abstract

The increasing popularity of malicious software attacks concerns computer security professionals. While several platforms exist to evaluate malware, this project aimed to create a physical system to verify and expand on previous research. The project developed NETSS: a networked environment for testing suspicious software, a system designed to emulate the Internet. Unlike virtual alternatives, NETSS consists of four physical machines that are sandboxed, directing all outbound Internet traffic to a single internal server that responds to popular network service requests. With logging functions enabled, analysts may run a suspicious piece of software for evaluation. During testing, NETSS was used to analyze and identify a popular worm that appeared in a suspicious e-mail. The project also began development of the Ashburn-Sulcoski index, which quantifies malware threat potential. This index provides US Government agencies and other professionals a standard to quantify malware threats. Although the project produced a working index, refinement continues

Published
2004
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37. School-Business Partnerships That Help Schools, Businesses, and Economic Development

Author

Ivan J. Lach and Lynn Tolle Burger

Subjects
Economic growth, Nothing, ComputingMilieux_COMPUTERSANDEDUCATION, The Renaissance, Business, Social Sciences (miscellaneous), Education
Abstract

School/business partnerships are nothing new—but they are undergoing a renaissance as schools use these partnerships to help implement school-to-work transition systems and assist with economic development. It has long been a key role of community colleges to provide education and training to enable their students to get jobs, but increasingly community colleges find they must also play a key role in economic development to ensure that the local economy can provide jobs for the college's graduates.

Published
1994
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38. New upper limit for the branching ratio of theΩ−→Ξ−γ radiative decay

Author

T. Dubbs, Shi Huanzhang, D Chen, N. K. Terentyev, Tkatch, I. F. Albuquerque, E. McCliment, L. N. Uvarov, Lang Pengfei, P. Gouffon, R.A. Carrigan, Alexei Khanzadeev, J. Lach, A. S. Denisov, Zhao Wenheng, Tang Fukun, A. M. F. Endler, H. Gottschalk, Mcp Maia, Zheng Shuchen, M. Luksys, V.A. Schegelsky, A. V. Dobrovolsky, An.A. Vorobyov, Carlos Escobar, A. Morelos, N. F. Bondar, Mahon, M. A. Kubantsev, Dai Lisheng, V. L. Golovtsov, V. M. Samsonov, Li Chengze, Li Yunshan, M. Foucher, Vincent J Smith, Yan Jie, P. S. Cooper, C. R. Newsom, N. P. Kuropatkin, V. T. Grachev, Zhong Yuanyuan, and S. Timm

Subjects
Physics, Particle physics, Proton, Branching fraction, Hyperon, Radiative decay, Omega, Nuclear physics, Physics::Accelerator Physics, High Energy Physics::Experiment, Limit (mathematics), Fermilab, Nuclear Experiment, Beam (structure)
Abstract

We have searched for the rare hyperon radiative decay Omega- to Xi- gamma, using the Fermilab Proton Center 375 GeV/c charged hyperon beam. Our measurement of the Omega- beam fraction at 13.6 m from production is (4.8 +_ 0.4)10**(-5). No signal was found and we determine a new upper limit of (4.6 x 10**-4) at 90% CL for the Omega- to Xi- gamma branching ratio.

Published
1994
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39. VLHC/NLC slow ground motion studies in Illinois

Author

B. Baklakov, V. V. Parkhomchuk, A. Erokhin, M. Kondaurov, Vladimir Shiltsev, A. Chupyra, J. Lach, E. Shubin, and S. Singatulin

Subjects
Ground motion, Physics, Particle physics, Physics::Instrumentation and Detectors, Hadron, Particle accelerator, law.invention, Nuclear physics, law, Physics::Accelerator Physics, High Energy Physics::Experiment, Fermilab, Collider, Very Large Hadron Collider, Level measurement
Abstract

Since October 1999 we carry out continuous measurements of the slow ground motion on and nearby Fermilab site with a primary goal to provide experimental data for the Very Large Hadron Collider (VLHC) and Next Linear Collider (NLC) projects. Here we give a general description of the experimental set-up, present main results and discuss consequences for the colliders.

Published
2002
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40. First measurement ofπ−e→π−eγpion virtual compton scattering

Author

A. Ocherashvili, G. Alkhazov, A. G. Atamantchouk, M. Y. Balatz, N. F. Bondar, P. S. Cooper, L. J. Dauwe, G. V. Davidenko, U. Dersch, A. G. Dolgolenko, G. B. Dzyubenko, R. Edelstein, L. Emediato, A. M. F. Endler, J. Engelfried, I. Eschrich, C. O. Escobar, A. V. Evdokimov, I. S. Filimonov, F. G. Garcia, M. Gaspero, I. Giller, V. L. Golovtsov, P. Gouffon, E. Gülmez, He Kangling, M. Iori, S. Y. Jun, M. Kaya, J. Kilmer, V. T. Kim, L. M. Kochenda, I. Konorov, A. P. Kozhevnikov, A. G. Krivshich, H. Krüger, M. A. Kubantsev, V. P. Kubarovsky, A. I. Kulyavtsev, N. P. Kuropatkin, V. F. Kurshetsov, A. Kushnirenko, S. Kwan, J. Lach, A. Lamberto, L. G. Landsberg, I. Larin, E. M. Leikin, Li Yunshan, M. Luksys, T. Lungov, V. P. Maleev, D. Mao, Mao Chensheng, Mao Zhenlin, P. Mathew, M. Mattson, V. Matveev, E. McCliment, M. A. Moinester, V. V. Molchanov, A. Morelos, K. D. Nelson, A. V. Nemitkin, P. V. Neoustroev, C. Newsom, A. P. Nilov, S. B. Nurushev, Y. Onel, E. Ozel, S. Ozkorucuklu, A. Penzo, S. I. Petrenko, P. Pogodin, B. Pouh, M. Procario, V. A. Prutskoi, E. Ramberg, G. F. Rappazzo, B. V. Razmyslovich, V. I. Rud, J. Russ, P. Schiavon, J. Simon, A. I. Sitnikov, D. Skow, V. J. Smith, M. Srivastava, V. Steiner, V. Stepanov, L. Stutte, M. Svoiski, N. K. Terentyev, G. P. Thomas, L. N. Uvarov, A. N. Vasiliev, D. V. Vavilov, V. S. Verebryusov, V. A. Victorov, V. E. Vishnyakov, A. A. Vorobyov, K. Vorwalter, J. You, Zhao Wenheng, Zheng Shuchen, and R. Zukanovich-Funchal

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Chiral perturbation theory, 010308 nuclear & particles physics, Monte Carlo method, Compton scattering, Sigma, Electron, 01 natural sciences, Nuclear physics, Cross section (physics), Pion, 0103 physical sciences, High Energy Physics::Experiment, Fermilab, 010306 general physics
Abstract

Pion virtual compton scattering (VCS) via the reaction pi(-)e-->pi(-)egamma was observed in the Fermilab E781 SELEX experiment. SELEX used a 600 GeV/c pi(-) beam incident on target atomic electrons, detecting the incident pi(-) and the final state pi(-), electron and gamma. Theoretical predictions based on chiral perturbation theory are incorporated into a Monte Carlo simulation of the experiment and are compared to the data. The number of reconstructed events (=9) and their distribution with respect to the kinematic variables (for the kinematic region studied) are in reasonable accord with the predictions. The corresponding pi(-) VCS experimental cross section is sigma=38.8+/-13 nb, in agreement with the theoretical expectation of sigma=34.7 nb.

Published
2002
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41. First observation of the doubly charmed baryon Xi(+)(cc)

Author

M, Mattson, G, Alkhazov, A G, Atamantchouk, M Y, Balatz, N F, Bondar, P S, Cooper, L J, Dauwe, G V, Davidenko, U, Dersch, A G, Dolgolenko, G B, Dzyubenko, R, Edelstein, L, Emediato, A M F, Endler, J, Engelfried, I, Eschrich, C O, Escobar, A V, Evdokimov, I S, Filimonov, F G, Garcia, M, Gaspero, I, Giller, V L, Golovtsov, P, Gouffon, E, Gülmez, He, Kangling, M, Iori, S Y, Jun, M, Kaya, J, Kilmer, V T, Kim, L M, Kochenda, I, Konorov, A P, Kozhevnikov, A G, Krivshich, H, Krüger, M A, Kubantsev, V P, Kubarovsky, A I, Kulyavtsev, N P, Kuropatkin, V F, Kurshetsov, A, Kushnirenko, S, Kwan, J, Lach, A, Lamberto, L G, Landsberg, I, Larin, E M, Leikin, Li, Yunshan, M, Luksys, T, Lungov, V P, Maleev, D, Mao, Mao, Chensheng, Mao, Zhenlin, P, Mathew, V, Matveev, E, McCliment, M A, Moinester, V V, Molchanov, A, Morelos, K D, Nelson, A V, Nemitkin, P V, Neoustroev, C, Newsom, A P, Nilov, S B, Nurushev, A, Ocherashvili, E, Oliveira, Y, Onel, E, Ozel, S, Ozkorucuklu, A, Penzo, S V, Petrenko, P, Pogodin, M, Procario, V A, Prutskoi, E, Ramberg, G F, Rappazzo, B V, Razmyslovich, V I, Rud, J, Russ, P, Schiavon, J, Simon, A I, Sitnikov, D, Skow, V J, Smith, M, Srivastava, V, Steiner, V, Stepanov, L, Stutte, M, Svoiski, N K, Terentyev, G P, Thomas, L N, Uvarov, A N, Vasiliev, D V, Vavilov, V S, Verebryusov, V A, Victorov, V E, Vishnyakov, A A, Vorobyov, K, Vorwalter, J, You, Zhao, Wenheng, Zheng, Shuchen, and R, Zukanovich-Funchal

Abstract

We observe a signal for the doubly charmed baryon Xi(+)(cc) in the charged decay mode Xi(+)(cc)--Lambda(+)(c)K-pi(+) in data from SELEX, the charm hadroproduction experiment at Fermilab. We observe an excess of 15.9 events over an expected background of 6.1+/-0.5 events, a statistical significance of 6.3sigma. The observed mass of this state is 3519+/-1 MeV/c(2). The Gaussian mass width of this state is 3 MeV/c(2), consistent with resolution; its lifetime is less than 33 fs at 90% confidence.

Published
2002

42. 233U/236U signature allows to distinguish environmental emissions of civil nuclear industry from weapons fallout

Author

K. Hain, P. Steier, M. B. Froehlich, R. Golser, X. Hou, J. Lachner, T. Nomura, J. Qiao, F. Quinto, and A. Sakaguchi

Subjects
Science
Abstract

The dominant emission sources of anthropogenic radionuclides come from either atmospheric nuclear weapons tests or the nuclear industry (i.e., reprocessing plants or reactor accidents). Here, the authors identify a new environmental isotope tracer ($$^{233}$$ 233 U/$$^{236}$$ 236 U) which can help distinguish emissions from nuclear weapons tests, and can also provide constraints on past weapon designs and fuel sources, for which many details remain classified or lost.

Published
2020
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43. The role of diagnostic hysteroscopy in diagnosis of incomplete uterine septum/significant arcuate uterine anomaly in infertile patients in the era of transvaginal 3D ultrasound scan

Author

O. Abuzeid, J. LaChance, O. Zaghmout, J. Corrado, J. Hebert, M. Ashraf, and M. I. Abuzeid

Subjects
Arcuate uterine anomaly, Hysteroscopy, Incomplete uterine septum, TV 3D US, Medicine (General), R5-920, Reproduction, QH471-489
Abstract

Abstract Background To determine the accuracy of measurement of internal indentation length on transvaginal 3D ultrasound scan (TV 3D US) in detecting patients with an incomplete uterine septum (IUS) or a significant arcuate uterine anomaly (AUA) based on the actual length as measured on diagnostic hysteroscopy. We compared the mean internal indentation length on TV 3D US and on diagnostic hysteroscopy in patients with IUS or a significant AUA. Results This is a retrospective study of 546 patients who were found to have IUS (134) or significant AUA (412) on diagnostic hysteroscopy and who had TV 3D US prior to surgery. The mean internal indentation length measured in millimeter on hysteroscopy was significantly higher than the mean internal indentation length measured on TV 3D US in patients with IUS (16.7 + 5.5 vs 5.5 + 4.2; P < 0.001), in patients with significant AUA (12.9 + 2.8 vs 3.9 + 4.6; P < 0.001), and in the overall population (13.8 + 4.0 vs 4.3 + 4.5; P < 0.001). The same findings were obtained when the comparison was limited to patients who had moderate significant internal indentation length (10–14 mm) and those with significant internal indentation length (15–25 mm). Conclusion Data in this study suggests that the mean internal indentation length in patients with IUS or AUA can be underestimated on TV 3D US. A diagnostic hysteroscopy is the only gold standard to make the correct diagnosis in these patients.

Published
2020
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44. A Coordenação na Gramática Discursivo-Funcional

Author

Erotilde Pezatti and J. Lachlan Mackenzie

Subjects
Computational linguistics. Natural language processing, P98-98.5, Language. Linguistic theory. Comparative grammar, P101-410
Abstract

Coordination has commonly been treated as a grammatical process of connecting clauses, in which an equipollence relation may occur between the units involved. The purpose of this paper is to show how a discourse-functional theory understands coordination, relating it to the levels and layers proposed in the model of Functional Discourse Grammar (Hengeveld/Mackenzie 2008). We propose that coordination in Portuguese, as a morphosyntactic phenomenon, results from the double action of the Interpersonal and Representational Levels: the relations of addition and alternativity (expressed by e and ou respectively) result not only from parallelism at the Interpersonal Level but also from operations at the Representational Level that make use of notions found in logic. The adversative relation expressed by mas, however, is shown to be identical to the additive one at the Representational Level, differing only at the Interpersonal Level, where it requires the rhetorical function Concession to be assigned to a dependent Discourse Act.

Published
2022
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45. Emotion, lies, and 'bullshit' in journalistic discourse: The case of fake news

Author

Laura Alba-Juez and J. Lachlan Mackenzie

Subjects
emotion, persuasion, manipulation, fake news, post-truth, bullshit, scalarity of lying, Language and Literature, Philology. Linguistics, P1-1091
Abstract

Emotion is part and parcel of all kinds of human experience and as such plays an important role in all discourse types, including professional discourse. In the 21st century more than ever, the proper channeling and expression of our emotions at the workplace has come to be considered a sign of emotional intelligence, powerful leadership, and (harmless) persuasion skills. However, persuasion can also be used as a weapon to lie and manipulate people’s emotions. Meibauer (2018) notes that lying and deception play an important role in business and trade, and this is obviously the case in the business of fake news. In this article we analyze the genre of fake news within professional journalistic discourse. We carry out a qualitative sociopragmatic analysis of samples of political and scientific fake news in English, and show how this kind of journalism aims at manipulating readers’ emotions not only through the use of prototypical lies (i.e. assertions whose content the speaker believes to be false, uttered with the intention of deceiving the hearer), but mainly by means of complex discourse-pragmatic strategies such as the skillful manipulation of the three chief evaluative subsystems, ATTITUDE, ENGAGEMENT and GRADUATION (Martin & White, 2005), the triggering of false inferences and the display of misleading images, thus playing with the scalarity of lying. This in turn leads us to some important conclusions showing that the fact that the linguistic expression of falsity can be scalar is intimately connected with the concepts of “bullshit” (Frankfurt, 2005) and “post-truth” (Keyes, 2004): a good story that somehow touches readers’ emotions, even if it is deceiving, prevails over a true story, because the readers choose to accept as true what makes them “feel good”

Published
2019

46. Hydrostatic level system for slow ground motion studies at Fermilab and SLAC

Author

A. Medvedko, Andrei Seryi, V. V. Parkhomchuk, J. Lach, M. Kondaurov, D. Plant, Vladimir Shiltsev, B. Baklakov, R. Ruland, A. Erokhin, S. Singatulin, E. Shubin, and A. Chupyra

Subjects
Ground motion, Physics, business.industry, Electrical engineering, Particle accelerator, Accelerators and Storage Rings, law.invention, law, Measuring instrument, Physics::Accelerator Physics, High Energy Physics::Experiment, Fermilab, Aerospace engineering, Hydrostatic equilibrium, business, Level measurement
Abstract

A series of new ground motion studies using an upgraded hydrostatic level system are planned at Fermilab and SLAC in collaboration with BINP. To better characterize both the spatial and temporal characteristics of slow ground motion, these studies will use large number of probes and will also be performed in several geologically different locations. The hydrostatic level system used in ongoing measurements near Fermilab [1] suffers from uncertainty of temperature fluctuation effects. This paper presents improvements to be incorporated into the upgraded hydrostatic level system, present status, and the plan for experimental studies.

Published
2001

47. Measurement of the Ds lifetime

Author

M Iori, G Alkhazov, A.G Atamantchouk, M.Y Balatz, N.F Bondar, P.S Cooper, L.J Dauwe, G.V Davidenko, U Dersch, A.G Dolgolenko, G.B Dzyubenko, R Edelstein, L Emediato, A.M.F Endler, J Engelfried, I Eschrich, C.O Escobar, A.V Evdokimov, I.S Filimonov, F.G Garcia, M Gaspero, I Giller, V.L Golovtsov, P Gouffon, E Gülmez, He Kangling, S.Y Jun, M Kaya, J Kilmer, V.T Kim, L.M Kochenda, I Konorov, A.P Kozhevnikov, A.G Krivshich, H Krüger, M.A Kubantsev, V.P Kubarovsky, A.I Kulyavtsev, N.P Kuropatkin, V.F Kurshetsov, A Kushnirenko, S Kwan, J Lach, A Lamberto, L.G Landsberg, I Larin, E.M Leikin, Y Li, M Luksys, T Lungov, V.P Maleev, D Mao, C Mao, Z Mao, P Mathew, M Mattson, V Matveev, E McCliment, M.A Moinester, V.V Molchanov, A Morelos, K.D Nelson, A.V Nemitkin, P.V Neoustroev, C Newsom, A.P Nilov, S.B Nurushev, A Ocherashvili, Y Onel, E Ozel, S Ozkorucuklu, A Penzo, S.V Petrenko, P Pogodin, M Procario, V.A Prutskoi, E Ramberg, G.F Rappazzo, B.V Razmyslovich, V.I Rud, J Russ, P Schiavon, J Simon, A.I Sitnikov, D Skow, V.J Smith, M Srivastava, V Steiner, V Stepanov, L Stutte, M Svoiski, N.K Terentyev, G.P Thomas, L.N Uvarov, A.N Vasiliev, D.V Vavilov, V.S Verebryusov, V.A Victorov, V.E Vishnyakov, A.A Vorobyov, K Vorwalter, J You, W Zhaog, S Zheng, R Zukanovich-Funchal, Ball State University, Bogazici University, Carnegie-Mellon University, Centro Brasileiro de Pesquisas F�sicas, Fermilab, Institute for High Energy Physics, Institute of High Energy Physics, Institute of Theoretical and Experimental Physics, Max-Planck-Institut für Kernphysik, Moscow State University, Petersburg Nuclear Physics Institute, Tel Aviv University, Universidad Autónoma de San Luis Potosí, Universidade Federal da Paraíba (UFPB), University of Bristol, University of Iowa, University of Michigan-Flint, University of Rome 'La Sapienza' and INFN, Universidade de São Paulo (USP), University of Trieste and INFN, Infinion, Imperial College, Universidade Estadual de Campinas (UNICAMP), Technische Universität München, The Boston Consulting Group, Lucent Technologies, Universidade Estadual Paulista (UNESP), SPSS Inc, University of Alabama at Birmingham, DOE, Siemens Medizintechnik, and Deutsche Bank AG

Subjects
Physics, High Energy Physics - Experiment (hep-ex), Nuclear and High Energy Physics, Particle physics, Spectrometer, Meson, 010308 nuclear & particles physics, 0103 physical sciences, FOS: Physical sciences, Sigma, 010306 general physics, 01 natural sciences, High Energy Physics - Experiment
Abstract

We report precise measurement of the Ds meson lifetime. The data were taken by the SELEX experiment (E781) spectrometer using 600 GeV/c Sigma-, pi- and p beams. The measurement has been done using 918 reconstructed Ds. The lifetime of the Ds is measured to be 472.5 +- 17.2 +- 6.6 fs, using K*(892)0K+- and phi pi+- decay modes. The lifetime ratio of Ds to D0 is 1.145+-0.049., Comment: 5 pages, 2 figures submitted to Phys. Lett. B

Published
2001

48. Avian metapneumovirus infection in turkeys: a review on turkey rhinotracheitis

Author

K. Kaboudi and J. Lachheb

Subjects
avian metapneumovirus, turkey rhinotracheitis, mucosal immunity, vaccination, biosecurity, Animal culture, SF1-1100, Food processing and manufacture, TP368-456
Abstract

SUMMARY: Avian metapneumovirus (aMPV) is a major respiratory pathogen in poultry worldwide, causing an acute and highly contagious infection of the upper respiratory tract in turkeys (turkey rhinotracheitis) and many other avian species, including chickens (swollen head syndrome). Since its first description in late 1970s in South Africa, 6 subtypes (A, B, C, D, and 2 new subtypes) have been identified. Infected animals develop local and systemic immunity. However, maternal derived antibodies do not correlate with protection. In intensive flocks, infection spreads rapidly between birds. Wild birds can be infected and they are suggested as probable links. Affected turkeys exhibit nonspecific symptoms and lesions dominated by an acute inflammation of the upper respiratory tract. The virus can induce a decrease in egg production and poor eggshell quality that cause huge economic losses to the poultry industry. Diagnosis of aMPV infection is performed by ELISA tests and molecular methods (RT-PCR). Application of rigorous biosecurity and vaccination programs are crucial and effective for the control of turkey rhinotracheitis. Different types of vaccines are used, with satisfactory protection offered by live attenuated and inactivated vaccines. In addition, new vaccines are being developed and tested which seem to give convincing results.

Published
2021
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49. P776: A PHASE 2, OPEN-LABEL, ASCENDING DOSE STUDY OF KER-050 FOR THE TREATMENT OF ANEMIA IN PATIENTS WITH VERY LOW, LOW, OR INTERMEDIATE RISK MYELODYSPLASTIC SYNDROMES

Author

S. Tan, A. Arbelaez, L. Chee, C. Y. Fong, D. Hiwase, G. Kannourakis, J. Kwan, J. Liang, A. Puliyayil, H. Rose, D. Ross, T.-C. Teh, D. Westerman, J. Wight, W. Feng, J. Lachey, A. McGinty, H. Natarajan, C. Rovaldi, and S. Cooper

Subjects
Diseases of the blood and blood-forming organs, RC633-647.5
Published
2022
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