122 citations · 527 across the 22 of their papers we have counts for
22 papers
The DarkLight Experiment at TRIUMF
R. Alarcon, D. Almonte, M. I. Alstaty +60
This paper reports on the commissioning of the DarkLight experiment at the ARIEL superconducting electron linear accelerator located at TRIUMF in Vancouver, Canada. DarkLight was d…
Fundamental Neutron Physics: a White Paper on Progress and Prospects in the US
R. Alarcon, A. Aleksandrova, S. Baeßler +88
Fundamental neutron physics, combining precision measurements and theory, probes particle physics at short range with reach well beyond the highest energies probed by the LHC. Sign…
The Two-Photon Exchange Experiment at DESY
R. Alarcon, R. Beck, J. C. Bernauer +36
We propose a new measurement of the ratio of positron-proton to electron-proton elastic scattering at DESY. The purpose is to determine the contributions beyond single-photon excha…
Searching for New Physics with DarkLight at the ARIEL Electron-Linac
The DarkLight Collaboration, E. Cline, R. Corliss +43
The search for a dark photon holds considerable interest in the physics community. Such a force carrier would begin to illuminate the dark sector. Many experiments have searched fo…
Measurement of the Parity-Odd Angular Distribution of Gamma Rays From Polarized Neutron Capture on Cl
N. Fomin, R. Alarcon, L. Alonzi +61
We report a measurement of two energy-weighted gamma cascade angular distributions from polarized slow neutron capture on the Cl nucleus, one parity-odd correlation propor…
Electric dipole moments and the search for new physics
Ricardo Alarcon, Jim Alexander, Vassilis Anastassopoulos +140
Static electric dipole moments of nondegenerate systems probe mass scales for physics beyond the Standard Model well beyond those reached directly at high energy colliders. Discrim…
Measurement of the Charge-Averaged Elastic Lepton-Proton Scattering Cross Section by the OLYMPUS Experiment
J. C. Bernauer, A. Schmidt, B. S. Henderson +67
We report the first measurement of the average of the electron-proton and positron-proton elastic scattering cross sections. This lepton charge-averaged cross section is insensitiv…
A novel approach to building micromegas detectors enabled by precision manufacturing
J. Holmes, E. Galyaev, R. Alarcon +5
Micromegas detectors are a relatively modern design concept for micropattern gas detectors, designed to handle high particle flux while providing high gain, high spatial resolution…
A New Cryogenic Apparatus to Search for the Neutron Electric Dipole Moment
M. W. Ahmed, R. Alarcon, A. Aleksandrova +91
A cryogenic apparatus is described that enables a new experiment, nEDM@SNS, with a major improvement in sensitivity compared to the existing limit in the search for a neutron Elect…
The neutron electric dipole moment experiment at the Spallation Neutron Source
K. K. H. Leung, M. Ahmed, R. Alarcon +90
Novel experimental techniques are required to make the next big leap in neutron electric dipole moment experimental sensitivity, both in terms of statistics and systematic error co…
Design and Operation of a Windowless Gas Target Internal to a Solenoidal Magnet for Use with a Megawatt Electron Beam
S. Lee, R. Corliss, I. Friščić +37
A windowless hydrogen gas target of nominal thickness cm is an essential component of the DarkLight experiment, which is designed to utilize the megawatt electron…
The Nab Experiment: A Precision Measurement of Unpolarized Neutron Beta Decay
J. Fry, R. Alarcon, S. Baessler +69
Neutron beta decay is one of the most fundamental processes in nuclear physics and provides sensitive means to uncover the details of the weak interaction. Neutron beta decay can e…
First Observation of -odd Asymmetry in Polarized Neutron Capture on Hydrogen
D. Blyth, J. Fry, N. Fomin +61
We report the first observation of the parity-violating 2.2 MeV gamma-ray asymmetry in neutron-proton capture using polarized cold neutrons incident on a liquid parahydr…
Performance of new silica aerogels in a threshold Cerenkov counter
D. Blyth, R. Alarcon, R. Begag +2
New highly transparent, hydrophobic silica aerogels with refractive indices of 1.01 to 1.07 have been produced by Aspen Aerogels, Inc., and select tiles have been tested using an e…
The DarkLight Experiment: A Precision Search for New Physics at Low Energies
J. Balewski, J. Bernauer, J. Bessuille +37
We describe the current status of the DarkLight experiment at Jefferson Laboratory. DarkLight is motivated by the possibility that a dark photon in the mass range 10 to 100 MeV/c$^…
New measurement of the scattering cross section of slow neutrons on liquid parahydrogen from neutron transmission
K. B. Grammer, R. Alarcon, L. Barrón-Palos +25
Liquid hydrogen is a dense Bose fluid whose equilibrium properties are both calculable from first principles using various theoretical approaches and of interest for the understand…
The OLYMPUS Experiment
R. Milner, D. K. Hasell, M. Kohl +70
The OLYMPUS experiment was designed to measure the ratio between the positron-proton and electron-proton elastic scattering cross sections, with the goal of determining the contrib…
Neutron Beta Decay Studies with Nab
S. Baeßler, R. Alarcon, L. P. Alonzi +31
Precision measurements in neutron beta decay serve to determine the coupling constants of beta decay and allow for several stringent tests of the standard model. This paper discuss…
Nab: Measurement Principles, Apparatus and Uncertainties
D. Pocanic, R. Alarcon, L. P. Alonzi +23
The Nab collaboration will perform a precise measurement of 'a', the electron-neutrino correlation parameter, and 'b', the Fierz interference term in neutron beta decay, in the Fun…
Measurement of the proton electric to magnetic form factor ratio from \vec ^1H(\vec e, e'p)
C. B. Crawford, A. Sindile, T. Akdogan +51
We report the first precision measurement of the proton electric to magnetic form factor ratio from spin-dependent elastic scattering of longitudinally polarized electrons from a p…
Spin-Momentum Correlations in Quasi-Elastic Electron Scattering from Deuterium
I. Passchier, L. D. van Buuren, D. Szczerba +24
We report on a measurement of spin-momentum correlations in quasi-elastic scattering of longitudinally polarized electrons with an energy of 720 MeV from vector-polarized deuterium…
A Measurement of the Interference Structure Function, R_LT, for the 12C(e,e'p) reaction in the Quasielastic Region
M. Holtrop, D. Jordan, T. McIlvain +34
The coincidence cross-section and the interference structure function, R_LT, were measured for the 12C(e,e'p) 11B reaction at quasielastic kinematics and central momentum transfer…