Explanipedia

Measuring short-range correlations and quasi-elastic cross sections in A(e,e’) at x > 1 and modest Q2 Open

D. Nguyen, Z. Ahmed, A. Beck, Vincenzo Bellini, C. Chen , et al. · 2025

Measuring short-range correlations and quasi-elastic cross sections in A(e,e') at x>1 and modest Q$^2$ Open

Yu Zhang, Z.H. Ye, D. Nguyen, P. Aguilera, Z. Ahmed , et al. · 2025

We present results from the Jefferson Lab E08-014 experiment, investigating short-range correlations (SRC) through measurements of absolute inclusive quasi-elastic cross sections and their ratios. This study utilized 3.356 GeV electrons sc…

Measurement of the Parity-Violating Asymmetry in the N to $Δ$ Transition at Low $Q^2$ Open

D. Adhikari, Thamraa A. Alshayeb, D. Androić, David Armstrong, A. Asaturyan , et al. · 2025

We report the measurement of the parity-violating asymmetry in the N to $Δ$ transition via the $e^- + p \rightarrow e^- + Δ^+$ reaction at two different kinematic points with low four-momentum transfer Q$^2$. Measurements were made with in…

High‐Efficiency Multilevel Phase Lenses with Nanostructures on Polyimide Membranes Open

Leslie Howe, Tharindu D. Rajapaksha, Kalani H. Ellepola, Vinh X. Ho, Zachary Aycock , et al. · 2024

The emergence of planar meta‐lenses on flexible materials has profoundly impacted the long‐standing perception of diffractive optics. Despite their advantages, these lenses still face challenges in design and fabrication to obtain high foc…

Probing for high-momentum protons in via the reactions Open

S. Iqbal, F. Benmokhtar, M. V. Ivanov, New See, K. Aniol , et al. · 2022

Experimental cross sections for the He-4(e, e'p)X reactions in the missing energy range from 0.017 to 0.022 GeV and up to a missing momentum of 0.632 GeV/c at x(B) = 1.24 and Q(2) = 2 (GeV/c)(2) are reported. The data are compared to relat…

Stratospheric Aerosol and Gas Experiment (SAGE) from SAGE III on the ISS to a Free Flying SAGE IV Cubesat Open

J. Leckey, Robert Damadeo, Charles Hill · 2021

The Stratospheric Aerosol and Gas Experiment III (SAGE III) on the International Space Station (ISS) is widely accepted as a stable source for high-quality stratospheric ozone, aerosol, and water vapor measurements since it was installed o…

Measurement of the beam-normal single-spin asymmetry for elastic electron scattering from and Open

D. Androić, David Armstrong, A. Asaturyan, K. Bartlett, R. Beminiwattha , et al. · 2021

We report measurements of the parity-conserving beam-normal single-spin elastic scattering asymmetries $B_n$ on $^{12}$C and $^{27}$Al, obtained with an electron beam polarized transverse to its momentum direction. These measurements add a…

Novel observation of isospin structure of short-range correlations in calcium isotopes Open

D. Nguyen, Z. Ye, P. Aguilera, Z. Ahmed, H. Al-Bataineh , et al. · 2020

Short Range Correlations (SRCs) have been identiffed as being responsible for the high momentum tail of the nucleon momentum distribution, n(k). Hard, short-range interactions of nucleon pairs generate the high momentum tail and imprint a …

The GlueX beamline and detector Open

S. Adhikari, C. S. Akondi, H. Al Ghoul, A. B. M. Shawkat Ali, M. J. Amaryan , et al. · 2020

Precision Measurement of the Beam-Normal Single-Spin Asymmetry in Forward-Angle Elastic Electron-Proton Scattering Open

D. Androić, David Armstrong, A. Asaturyan, K. Bartlett, J. Beaufait , et al. · 2020

A beam-normal single-spin asymmetry generated in the scattering of transversely polarized electrons from unpolarized nucleons is an observable related to the imaginary part of the two-photon exchange process. We report a 2% precision measu…

Parity-violating inelastic electron-proton scattering at low above the resonance region Open

D. Androić, David Armstrong, A. Asaturyan, K. Bartlett, R. Beminiwattha , et al. · 2020

We report the measurement of the parity-violating asymmetry for the inelastic scattering of electrons from the proton, at Q2=0.082GeV2 and W=2.23 GeV, above the resonance region. The result AInel=−13.5±2.0(stat)±3.9(syst) ppm agrees with t…

Sustainable Ozone and Aerosol Measurements from a 6U CubeSat: The Stratospheric Aerosol and Gas Experiment (SAGE) IV Pathfinder Open

M. D. Obland, Charles Hill, Robert Damadeo, J. Leckey · 2020

Stratospheric ozone represents only a tiny fraction of the atmosphere, yet is vitally important for life on Earth. Measurements from satellites provided data on the initial decline of ozone in the late 1970s and early 1980s that supported …

Probing for high momentum protons in $^4$He via the $^4He(e,e'p)X$ reaction Open

S. Iqbal, F. Benmokhtar, M. V. Ivanov, N. See, K. Aniol , et al. · 2019

Experimental cross sections for the $^4He(e,e'p)X$ reaction up to a missing momentum of 0.632 GeV/$c$ at $x_B=1.24$ and $Q^2$=2(GeV/$c$)$^2$ are reported. The data are compared to Relativistic Distorted Wave Impulse Approximation(RDWIA) ca…

Search for three-nucleon short-range correlations in light nuclei Open

Z. Ye, P. Solvignon, D. Nguyen, P. Aguilera, Z. Ahmed , et al. · 2018

We present new data probing short-range correlations (SRCs) in nuclei through the measurement of electron scattering off high-momentum nucleons in nuclei. The inclusive He-4/He-3 cross section ratio is observed to be both x and Q(2) indepe…

Search for three-nucleon short-range correlations in light nuclei Open

Z. Ye, J. Song, D. Nguyen, P. Aguilera, Z. Ahmed , et al. · 2017

We present new data probing short-range correlations (SRCs) in nuclei through the measurement of electron scattering off high-momentum nucleons in nuclei. The inclusive 4He/3He cross section ratio is observed to be both x and Q2 independen…

<i>Q</i><sub>weak</sub>: First Direct Measurement of the Proton’s Weak Charge Open

D. Androić, David Armstrong, A. Asaturyan, T. Averett, J. Balewski , et al. · 2017

The Q[subscript weak] experiment, which took data at Jefferson Lab in the period 2010 - 2012, will precisely determine the weak charge of the proton by measuring the parity-violating asymmetry in elastic e-p scattering at 1.1 GeV using a l…

The tracking analysis in the Q-weak experiment Open

Jie Pan, D. Androić, David Armstrong, A. Asaturyan, T. Averett , et al. · 2016

ABSOLUTE STANDARDS FOR CLIMATE MEASUREMENTS Open

J. Leckey · 2016

In a world of changing climate, political uncertainty, and ever-changing budgets, the benefit of measurements traceable to SI standards increases by the day. To truly resolve climate change trends on a decadal time scale, on-orbit measurem…

Electroexcitation of the Δ+(1232) at low momentum transfer Open

A. Blomberg, D. Anez, N. Sparveris, A. Sarty, M. Paolone , et al. · 2016

The Hall D Physics Program at JLab Open

J. Leckey · 2016

GlueX is one of the flagship experiments of the 12 GeV era at the Thomas Jefferson National Accelerator Facility (JLab). The energy of the electron accelerator at JLab is presently undergoing an upgrade from 6 GeV to 12 GeV and a 4th exper…

First results from the GlueX experiment Open

The GlueX Collaboration, H. Al Ghoul, E.G. Anassontzis, F. Barbosa, A. V. Barnes , et al. · 2016

© 2016 Author(s). The GlueX experiment at Jefferson Lab ran with its first commissioning beam in late 2014 and the spring of 2015. Data were collected on both plastic and liquid hydrogen targets, and much of the detector has been commissio…

Climate Absolute Radiance and Refractivity Observatory (CLARREO) Open

J. Leckey · 2015

The Climate Absolute Radiance and Refractivity Observatory (CLARREO) is a mission, led and developed by NASA, that will measure a variety of climate variables with an unprecedented accuracy to quantify and attribute climate change. CLARREO…

The Qweak experimental apparatus Open

Trent Allison, Mitchell D. Anderson, D. Androić, David Armstrong, A. Asaturyan , et al. · 2015

J. Leckey YOU? Author Swipe