A luminosity monitor for the A4 parity violation experiment at MAMI

A water Cherenkov luminosity monitor system with associated electronics has been developed for the A4 parity violation experiment at MAMI. The detector system measures the luminosity of the hydrogen target hit by the MAMI electron beam and monitors the stability of the liquid hydrogen target. Both is required for the precise study of the count rate asymmetries in the scattering of longitudinally polarized electrons on unpolarized protons. Any helicity correlated fluctuation of the target density leads to false asymmetries. The performance of the luminosity monitor, investigated in about 2000 hours with electron beam, and the results of its application in the A4 experiment are presented.Comment: 22 pages, 12 figures, submitted to NIM

Whitney coverings and the tent spaces T1,q(γ)T^{1,q}(\gamma) for the Gaussian measure

We introduce a technique for handling Whitney decompositions in Gaussian harmonic analysis and apply it to the study of Gaussian analogues of the classical tent spaces $T^{1,q}$ of Coifman, Meyer and Stein.Comment: 13 pages, 1 figure. Revised version incorporating referee's comments. To appear in Arkiv for Matemati

Electrodeposition in capillaries: bottom-up micro- and nanopatterning of functional materials on conductive substrates

A cost-effective and versatile methodology for bottom-up patterned growth of inorganic and metallic materials on the micro- and nanoscale is presented. Pulsed electrodeposition was employed to deposit arbitrary patterns of Ni, ZnO, and FeO(OH) of high quality, with lateral feature sizes down to 200–290 nm. The pattern was defined by an oxygen plasma-treated patterned PDMS mold in conformal contact with a conducting substrate and immersed in an electrolyte solution, so that the solid phases were deposited from the solution in the channels of the patterned mold. It is important that the distance between the entrance of the channels, and the location where deposition is needed, is kept limited. The as-formed patterns were characterized by high resolution scanning electron microscope, energy-dispersive X-ray analysis, atomic force microscopy, and X-ray diffraction

Chiral and deconfinement transition from correlation functions: SU(2) vs. SU(3)

We study a gauge invariant order parameter for deconfinement and the chiral condensate in SU(2) and SU(3) Yang-Mills theory in the vicinity of the deconfinement phase transition using the Landau gauge quark and gluon propagators. We determine the gluon propagator from lattice calculations and the quark propagator from its Dyson-Schwinger equation, using the gluon propagator as input. The critical temperature and a deconfinement order parameter are extracted from the gluon propagator and from the dependency of the quark propagator on the temporal boundary conditions. The chiral transition is determined using the quark condensate as order parameter. We investigate whether and how a difference in the chiral and deconfinement transition between SU(2) and SU(3) is manifest.Comment: 15 pages, 9 figures. For clarification one paragraph and two references added in the introduction and two sentences at the end of the first and last paragraph of the summary. Appeared in EPJ

Aksijalni i elektromagnetski nukleonske strukturne funkcije u nefizičkom području

We study the annihilation channel in antiproton-nucleon collisions with production of a single charged or neutral pion and a lepton-antilepton pair. These processes offer a unique possibility to study the nucleon electromagnetic form factors in the unphysical region. The differential cross section in an experimental set-up, where the pion is fully detected, is given with explicit dependence on the relevant nucleon form factors.Proučavamo kanal poništavanja u sudarima antiproton–nukleon s tvorbom jednog nabijenog ili neutralnog piona i para lepton-antilepton. Ti procesi pružaju jedinstvenu mogućnost za proučavanje nukleonskih elektromagnetskih strukturnih funkcija u nefizičkom području. Dajemo diferencijalni udarni presjek u mjernoj postavi u kojoj je pion cjelovito detektiran uz izričitu ovisnost o dotičnim nukleonskim strukturnim funkcijama

Study of resonant processes for multi-pion production in pˉ+p→ℓ++ℓ−+nππ\bar p +p\to\ell ^++\ell^- +n_\pi \pi annihilation

In frame of a phenomenological approach based on Compton-like Feynman amplitudes, we study multi-pion production in antiproton nucleon collisions. The main interest of this reaction is related to the possibility to study the properties of the presumable $\bar N N$ atom and of its resonances. For the case of formation of a scalar or pseudoscalar resonant state, with $I^G(J^{P})=1^-(0^{\pm}),~0^+(0^-)$ numerical results are obtained. The differential cross section in an experimental set-up where the pions invariant mass is measured, is given with explicit dependence on the lepton pair and pions invariant mass.Comment: 9 pages, 4 figure

Testing axial and electromagnetic nucleon form factors in time-like regions in the processes pˉ+n→π−+ℓ−+ℓ+\bar p + n\to \pi^- +\ell^-+\ell^+ and pˉ+p→π0+ℓ−+ℓ+\bar p+ p\to \pi^0 +\ell^- + \ell^+, ℓ=e\ell=e, μ\mu

In frame of a phenomenological approach based on Compton-like Feynman amplitudes, we study the annihilation channel in antiproton nucleon collisions with production of a single charged or neutral pion and a lepton-antilepton pair. These reactions allow to access nucleon and axial electromagnetic form factors in time-like region and offer a unique possibility to study the kinematical region below two nucleon threshold. The differential cross section in an experimental set-up where the pion is fully detected is given with explicit dependence on the relevant nucleon form factors. The possibility to measure heavy charged pion in the annihilation channel is also discussed.Comment: 23 pages, 9 figure

Gambaran Perilaku Keluarga Pengguna Jamkesmas terhadap Pelayanan Kesehatan di Puskesmas Pijorkoling Kecamatan Padangsidimpuan Tenggara Kota Padangsidimpuan Tahun 2012

Implementation of the Community Health Insurance (Jamkesmas) has the objective to improve access and quality of health services to all the poor and underprivileged in order to achieve an optimal level of public health effectively and efficiently. This study was a descriptive survey using a quantitative approach, to describe the behavior of the participants Jamkesmas in using health services in Kecamatan Padangsidimpuan Tenggara. The number of sample of this study was 95 households from 6361 population. The results of this study indicated that the knowledge of the respondents were generally in the category “not good” amounted to 76.8%, the attitude in the category of "medium" amounted to 96.8% and the action included in the category of "moderate" amounted to 50,5 %. The health workers were expected to provide good services either promotive, curative or rehabilitative to the Jamkesmas participants. The Head of Health Center was suggested to observe and provide health facilities required to carry out health services so that participants Jamkesmas would be more convenient using health care facilities