Scaling Tests of the Cross Section for Deeply Virtual Compton Scattering

We present the first measurements of the e⃗p→epγ cross section in the deeply virtual Compton scattering (DVCS) regime and the valence quark region. The Q2 dependence (from 1.5 to 2.3  GeV2) of the helicity-dependent cross section indicates the twist-2 dominance of DVCS, proving that generalized parton distributions (GPDs) are accessible to experiment at moderate Q2. The helicity-independent cross section is also measured at Q2=2.3  GeV2. We present the first model-independent measurement of linear combinations of GPDs and GPD integrals up to the twist-3 approximation

Double Spin Asymmetries of Inclusive Hadron Electroproductions from a Transversely Polarized 3He^3\rm{He} Target

We report the measurement of beam-target double-spin asymmetries ($A_\text{LT}$) in the inclusive production of identified hadrons, $\vec{e}~$+$~^3\text{He}^{\uparrow}\rightarrow h+X$, using a longitudinally polarized 5.9 GeV electron beam and a transversely polarized $^3\rm{He}$ target. Hadrons ($\pi^{\pm}$, $K^{\pm}$ and proton) were detected at 16$^{\circ}$ with an average momentum $$=2.35 GeV/c and a transverse momentum ($p_{T}$) coverage from 0.60 to 0.68 GeV/c. Asymmetries from the $^3\text{He}$ target were observed to be non-zero for $\pi^{\pm}$ production when the target was polarized transversely in the horizontal plane. The $\pi^{+}$ and $\pi^{-}$ asymmetries have opposite signs, analogous to the behavior of $A_\text{LT}$ in semi-inclusive deep-inelastic scattering.Comment: Published in PRC (92.015207), nuclear experiment, high-energy experimen

A prática da enfermeira em auditoria em saúde

O objetivo da investigação foi conhecer a prática da enfermeira em auditoria em saúde. A concepção de análise adotada foi a da hermenêutica-dialética, e foi desenvolvida em três lócus: a auditoria interna de uma organização hospitalar; a auditoria externa de um comprador privado de serviços de saúde, e o sistema de auditoria do âmbito estadual do Sistema Único de Saúde (SUS), na Bahia. Foram entrevistadas nove enfermeiras auditoras. Na auditoria do SUS, as enfermeiras expressaram satisfação no exercício desta prática e valorização de seu papel profissional. Na auditoria privada - interna e externa às organizações de saúde - as ações das enfermeiras se direcionam para atender aos interesses de seus contratantes, e pouco se relacionam com a assistência prestada pela equipe de enfermagem e com as necessidades dos usuários dos serviços.El objetivo de la investigación es conocer la práctica de la enfermera en la auditoría de salud. La concepción de análisis adoptada fue la de la hermenéutica-dialéctica, y se desarrolló en tres locales: la auditoría interna de una organización hospitalaria, la auditoría externa de un comprador privado de servicios de salud y el sistema de auditoría del ámbito estatal del Sistema Único de Salud (SUS) en Bahía, Brasil. Fueron entrevistadas nueve enfermeras auditoras. En la auditoría del SUS, las enfermeras expresaron satisfacción en el ejercicio de esta práctica y en la valorización de su papel profesional. En la auditoría privada - interna y externa a las organizaciones de salud - las acciones de las enfermeras están dirigidas a atender los intereses de sus contratantes, y poco se relacionan con la asistencia prestada por el equipo de enfermería y con las necesidades de los usuarios de los servicios.The objective of this investigation was to identify nurses' practice in heath audit. The hermeneutic-dialectic method was used for the analysis. The study was performed in three loci: the internal audit service of a hospital; the external audit service of a private health service buyer, and the state audit service of the public health system (SUS, acronym in Portuguese for Sistema Único de Saúde - Unique Health System), in Bahia. Nine audit nurses were interviewed. In the SUS audit, the nurses report being fulfilled with their practice and with the valorization of their professional role. In the private audit - both inside and outside of health organizations - the nurses' activities are focused on meeting the interests of their contractors, and do not get much involved with the care delivered by the nursing team and with the needs of service users

Beam Charge Asymmetries for Deeply Virtual Compton Scattering on the Proton at CLAS12

The parameterization of the nucleon structure through Generalized Parton Distributions (GPDs) shed a new light on the nucleon internal dynamics. For its direct interpretation, Deeply Virtual Compton Scattering (DVCS) is the golden channel for GPDs investigation. The DVCS process interferes with the Bethe-Heitler (BH) mechanism to constitute the leading order amplitude of the $eN \to eN\gamma$ process. The study of the $ep\gamma$ reaction with polarized positron and electron beams gives a complete set of unique observables to unravel the different contributions to the $ep \gamma$ cross section. This separates the different reaction amplitudes, providing a direct access to their real and imaginary parts which procures crucial constraints on the model dependences and associated systematic uncertainties on GPDs extraction. The real part of the BH-DVCS interference amplitude is particularly sensitive to the $D$-term which parameterizes the Gravitational Form Factors of the nucleon. The separation of the imaginary parts of the interference and DVCS amplitudes provides insights on possible higher-twist effects. We propose to measure the unpolarized and polarized Beam Charge Asymmetries (BCAs) of the $\vec{e}^{\pm}p \to e^{\pm}p \gamma$ process on an unpolarized hydrogen target with {\tt CLAS12}, using polarized positron and electron beams at 10.6~GeV. The azimuthal and $t$-dependences of the unpolarized and polarized BCAs will be measured over a large $(x_B,Q^2)$ phase space using a 100 day run with a luminosity of 0.66$\times 10^{35}$cm$^{-2}\cdot$s$^{-1}$.Comment: Proposal to the Jefferson Lab Program Advisory Committee (PAC51

Beam-Target Double Spin Asymmetry A_LT in Charged Pion Production from Deep Inelastic Scattering on a Transversely Polarized He-3 Target at 1.4<Q^2<2.7 GeV^2

We report the first measurement of the double-spin asymmetry $A_{LT}$ for charged pion electroproduction in semi\nobreakdash-inclusive deep\nobreakdash-inelastic electron scattering on a transversely polarized $^{3}$He target. The kinematics focused on the valence quark region, $0.16<x<0.35$ with $1.4<Q^{2}<2.7\,\textrm{GeV}^{2}$. The corresponding neutron $A_{LT}$ asymmetries were extracted from the measured $^{3}$He asymmetries and proton over $^{3}$He cross section ratios using the effective polarization approximation. These new data probe the transverse momentum dependent parton distribution function $g_{1T}^{q}$ and therefore provide access to quark spin-orbit correlations. Our results indicate a positive azimuthal asymmetry for $\pi^{-}$ production on $^{3}$He and the neutron, while our $\pi^{+}$ asymmetries are consistent with zero.Comment: 6 pages, 2 figures, 1 tables, published in PR