320 citations · 1.2k across the 10 of their papers we have counts for
10 papers
Search for a Dark Photon in Electro-Produced Pairs with the Heavy Photon Search Experiment at JLab
P. H. Adrian, N. A. Baltzell, M. Battaglieri +74
The Heavy Photon Search experiment took its first data in a 2015 engineering run at the Thomas Jefferson National Accelerator Facility, searching for a prompt, electro-produced dar…
The Heavy Photon Search beamline and its performance
N. Baltzell, H. Egiyan, M. Ehrhart +18
The Heavy Photon Search (HPS) is an experiment to search for a hidden sector photon, aka a heavy photon or dark photon, in fixed target electroproduction at the Thomas Jefferson Na…
The Heavy Photon Search Test Detector
Marco Battaglieri, Sergey Boyarinov, Stephen Bueltmann +61
The Heavy Photon Search (HPS), an experiment to search for a hidden sector photon in fixed target electroproduction, is preparing for installation at the Thomas Jefferson National…
Search for a new gauge boson in the Experiment (APEX)
S. Abrahamyan, Z. Ahmed, K. Allada +63
We present a search at Jefferson Laboratory for new forces mediated by sub-GeV vector bosons with weak coupling to electrons. Such a particle can be produced in electron-…
Air fluorescence measurements in the spectral range 300-420 nm using a 28.5 GeV electron beam
R. Abbasi, T. Abu-Zayyad, K. Belov +34
Measurements are reported of the yield and spectrum of fluorescence, excited by a 28.5 GeV electron beam, in air at a range of pressures of interest to ultra-high energy cosmic ray…
Precision Measurement of the Weak Mixing Angle in Moller Scattering
SLAC E158 Collaboration, P. L. Anthony
We report on a precision measurement of the parity-violating asymmetry in fixed target electron-electron (Moller) scattering: A_PV = -131 +/- 14 (stat.) +/- 10 (syst.) parts per bi…
Observation of Parity Nonconservation in Moller Scattering
the SLAC E158 Collaboration, P. L. Anthony
We report a measurement of the parity-violating asymmetry in fixed target electron-electron (Moller) scattering: A_PV = -175 +/- 30 (stat.) +/- 20 (syst.) parts per billion. This f…
A Monitor of the Focusing Strength of Plasma Lenses Using MeV Synchrotron Radiation
Clive Field, Gholam Mazaheri, Johnny S. T. Ng
The focusing strength of plasma lenses used with high energy electron or positron beams can give rise to synchrotron radiation with critical energies in the MeV range. A method is…
Observation of Plasma Focusing of a 28.5 GeV Positron Beam
J. S. T. Ng, P. Chen, H. Baldis +17
The observation of plasma focusing of a 28.5 GeV positron beam is reported. The plasma was formed by ionizing a nitrogen jet only 3 mm thick. Simultaneous focusing in both transver…
Observation of the Askaryan Effect: Coherent Microwave Cherenkov Emission from Charge Asymmetry in High Energy Particle Cascades
David Saltzberg, Peter Gorham, Dieter Walz +6
We present the first direct experimental evidence for the charge excess in high energy particle showers predicted nearly 40 years ago by Askaryan. We directed bremsstrahlung photon…