INST.DE FISICA LA PLATA
http://hdl.handle.net/11336/149
CONSEJO NAC.DE INVEST.CIENTIF.Y TECNICAS / CTRO.CIENTIFICO TECNOL.CONICET  LA PLATA / INST.DE FISICA LA PLATA
Sat, 23 Mar 2019 23:00:06 GMT
20190323T23:00:06Z

Synthesis, structure and properties of a zinc(II) complex with the lapacholate anion and ethanol as ligands
http://hdl.handle.net/11336/72355
Synthesis, structure and properties of a zinc(II) complex with the lapacholate anion and ethanol as ligands
Martínez, Miguel A.; De Jiménez, María C.L.; Castellano, Eduardo E.; Piro, Oscar Enrique; Aymonino, Pedro Jose
The reaction of lapachol, 2hydroxy3(3methyl2butenyl)1,4naphtoquinone, C15H 14O3, with zinc acetate, in ethanol, produces a chelate formula Zn(C15H13O3)2(C 2H6O)2, whose structure has been determined by single crystal Xray diffraction. It pertains to the triclinic system, space group P 1̄ (No. 2), a = 8.2380(3) Å, b = 9.4900(2) Å, c = 11.0110(4) Å, α = 112.536(2)°, β = 91.204(2)°, γ = 92.664(2)°, Z = 1. Some spectroscopic and chemical properties of the complex are also reported.
Sun, 01 Jun 2003 00:00:00 GMT
http://hdl.handle.net/11336/72355
20030601T00:00:00Z

Convolution of Lorentz invariant ultradistributions and field theory
http://hdl.handle.net/11336/72327
Convolution of Lorentz invariant ultradistributions and field theory
Bollini, C. G.; Rocca, Mario Carlos
A general definition of convolution between two arbitrary fourdimensional Lorentz invariant (fdLi) tempered ultradistributions is given, in both Minkowski and Euclidean space (spherically symmetric tempered Ultradistributions). The product of two arbitrary fdLi distributions of exponential type is defined via the convolution of its corresponding Fourier transforms. Several examples of convolution of two fdLi tempered ultadisrtibutions are given. In particular, we calculate exactly the convolution of two Feynman's massless prapagators. An expression for the Fourier transform of a Lorentz invariant tempered ultradistribution in terms of modified Bessel distributions is obtained in this work (generalization of Bochner's formula to Minkowski space). From the deduction of the convoltion formula, we obtain the generalization to the Minkowski space, of the dimensional regularization of the perturbation theory of Green functions in the Euclidean configuration space given in Erdelyi (Higher Transcendental Functions, 1953). As an example we evaluate the convolution of two ndimensional complexmass Wheeler propagators. © 2004 Springer Science+Business Media, Inc.
Thu, 01 Apr 2004 00:00:00 GMT
http://hdl.handle.net/11336/72327
20040401T00:00:00Z

Centennial of Xray diffraction: development of an unpromising experiment with a wrong explanation
http://hdl.handle.net/11336/72326
Centennial of Xray diffraction: development of an unpromising experiment with a wrong explanation
Piro, Oscar Enrique
In February 1912 in Munich, P. P Ewald, one of A. Sommerfeld's Ph.D. students, consulted M. Laue on matters related to crystal optics, his thesis subject. During the conversation, Laue conceived the idea that a crystal might act as a threedimensional diffraction grating to the Xrays. Despite the idea having met with scepticism among his colleagues, Laue succeeded in getting the help of two of W. C. Roentgen's doctorands: F. Friedrich, Sommerfeld's laboratory assistant, and P. Knipping: to undertake the, by now, legendary experiments that originated a new branch of Physics. The results solved two fundamental questions of the time: namely are the Xrays electromagnetic radiation (light) of very short wavelength? And also, do the crystals have spatial periodic arrangements? The affirmative answer to both questions was immediately followed in 1913 by the instrumentation and reinterpretation of the phenomenon through the pioneering work by W. H. Bragg and his son W. L. Bragg, who paved the way to the portentous development of structural crystallography by Xray diffraction that took place during the last hundred years.
Fri, 01 Jul 2016 00:00:00 GMT
http://hdl.handle.net/11336/72326
20160701T00:00:00Z

Measurement of the CPviolating phase ϕs and the B0s meson decay width difference with B0s→J/ψϕ decays in ATLAS
http://hdl.handle.net/11336/72301
Measurement of the CPviolating phase ϕs and the B0s meson decay width difference with B0s→J/ψϕ decays in ATLAS
Aaboud, M.; Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; Alconada Verzini, María Josefina; Alonso, Francisco; Arduh, Francisco Anuar; Dova, Maria Teresa; Monticelli, Fernando Gabriel; Wahlberg, Hernan Pablo; Bossio Sola, Jonathan David; Marceca, Gino; Otero y Garzon, Gustavo Javier; Piegaia, Ricardo Nestor; Sacerdoti, Sabrina; Zibell. A.; Zieminska, D.; Zimine, N. I.; Zimmermann, C.; Zimmermann, S.; Zinonos, Z.; Zinser, M.; Ziolkowski, M.; Živković, L.; Zobernig, G.; Zoccoli, A.; Nedden, M. zur; Zurzolo, G.; Zwalinski, L.; The ATLAS Collaboration
A measurement of the B 0 s decay parameters in the B 0 s → J/ψφ channel using an integrated luminosity of 14.3 fb−1 collected by the ATLAS detector from 8 TeV pp collisions at the LHC is presented. The measured parameters include the CPviolating phase φs , the decay width Γs and the width difference between the mass eigenstates ∆Γs . The values measured for the physical parameters are statistically combined with those from 4.9 fb−1 of 7 TeV data, leading to the following: φs = −0.090 ± 0.078 (stat.) ± 0.041 (syst.) rad ∆Γs = 0.085 ± 0.011 (stat.) ± 0.007 (syst.) ps−1 Γs = 0.675 ± 0.003 (stat.) ± 0.003 (syst.) ps−1 . In the analysis the parameter ∆Γs is constrained to be positive. Results for φs and ∆Γs are also presented as 68% and 95% likelihood contours in the φs–∆Γs plane. Also measured in this decay channel are the transversity amplitudes and corresponding strong phases. All measurements are in agreement with the Standard Model predictions.
Fri, 01 Jan 2016 00:00:00 GMT
http://hdl.handle.net/11336/72301
20160101T00:00:00Z