179 citations · 1k across the 43 of their papers we have counts for
22 papers · 1 filter
High efficiency veto hadron calorimeter in the NA64 experiment at CERN
Yu. M. Andreev, A. Antonov, M. A. Ayala Torres +53
NA64 is a fixed-target experiment at the CERN SPS designed to search for Light particle Dark Matter (LDM) candidates with masses in the sub-GeV range. During the 2016-2022 runs, th…
Proof of principle for a light dark matter search with low-energy positron beams at NA64
Yu. M. Andreev, A. Antonov, M. A. Ayala Torres +54
Thermal light dark matter (LDM) with particle masses in the 1 MeV - 1 GeV range could successfully explain the observed dark matter abundance as a relic from the primordial Univers…
First Measurement of Deeply Virtual Compton Scattering on the Neutron with Detection of the Active Neutron
CLAS Collaboration, A. Hobart, S. Niccolai +146
Measuring Deeply Virtual Compton Scattering on the neutron is one of the necessary steps to understand the structure of the nucleon in terms of Generalized Parton Distributions (GP…
Probing Light Dark Matter with positron beams at NA64
Yu. M. Andreev, A. Antonov, D. Banerjee +63
We present the results of a missing-energy search for Light Dark Matter which has a new interaction with ordinary matter transmitted by a vector boson, called dark photon $A^\prime…
Measurement of the intrinsic hadronic contamination in the NA64 high-purity beam at CERN
Yu. M. Andreev, D. Banerjee, B. Banto Oberhauser +65
In this study, we present the measurement of the intrinsic hadronic contamination at the CERN SPS H4 beamline configured to transport electrons and positrons at 100 GeV/c momentum.…
First CLAS12 measurement of DVCS beam-spin asymmetries in the extended valence region
CLAS Collaboration, G. Christiaens, M. Defurne +168
Deeply virtual Compton scattering (DVCS) allows one to probe Generalized Parton Distributions (GPDs) describing the 3D structure of the nucleon. We report the first measurement of…
Searching for Prompt and Long-Lived Dark Photons in Electro-Produced Pairs with the Heavy Photon Search Experiment at JLab
P. H. Adrian, N. A. Baltzell, M. Battaglieri +81
The Heavy Photon Search experiment (HPS) at the Thomas Jefferson National Accelerator Facility searches for electro-produced dark photons. We report results from the 2016 Engineeri…
A multidimensional study of the structure function ratio from hard exclusive electro-production off protons in the GPD regime
S. Diehl, A. Kim, K. Joo +151
A multidimensional extraction of the structure function ratio from the hard exclusive reaction above the resonance region has been pe…
First observation of correlations between spin and transverse momenta in back-to-back dihadron production at CLAS12
H. Avakian, T. B. Hayward, A. Kotzinian +153
We report the first measurements of deep inelastic scattering spin-dependent azimuthal asymmetries in back-to-back dihadron electroproduction, where two hadrons are produced in opp…
Dark matter search with the BDX-MINI experiment
M. Battaglieri, M. Bondì, A. Celentano +9
BDX-MINI is a beam dump experiment optimized to search for Light Dark Matter produced in the interaction of the intense CEBAF 2.176 GeV electron beam with the Hall A beam dump at J…
Search for a light muon-philic with the NA64- experiment at CERN
Yu. M. Andreev, D. Banerjee, B. Banto Oberhauser +58
The extension of Standard Model made by inclusion of additional gauge symmetry can explain the difference between the measured and the predicted value of the muon…
The Heavy Photon Search Experiment
Nathan Baltzell, Marco Battaglieri, Mariangela Bondi +59
The Heavy Photon Search (HPS) experiment is designed to search for a new vector boson in the mass range of 20 MeV/ to 220 MeV/ that kinetically mixes with the…
First-time measurement of Timelike Compton Scattering
P. Chatagnon, S. Niccolai, S. Stepanyan +146
We present the first measurement of the Timelike Compton Scattering process, , obtained with the CLAS12 detector at Jefferson Lab. The photon b…
Improved Elastic Scattering Cross Sections Between 0.9 and 2.0 GeV/c and Connections to the Neutron Star Equation of State
CLAS Collaboration, J. Rowley, N. Compton +143
Strange matter is believed to exist in the cores of neutron stars based on simple kinematics. If this is true, then hyperon-nucleon interactions will play a significant part in the…
Improved exclusion limit for light dark matter from annihilation in NA64
Yu. Andreev, D. Banerjee, J. Bernhard +55
The current most stringent constraints for the existence of sub-GeV dark matter coupling to Standard Model via a massive vector boson were set by the NA64 experiment for…
Light dark matter searches with positrons
M. Battaglieri, A. Bianconi, P. Bisio +28
We discuss two complementary strategies to search for light dark matter (LDM) exploiting the positron beam possibly available in the future at Jefferson Laboratory. LDM is a new co…
Differential cross sections for Λ(1520) using photoproduction at CLAS
U. Shrestha, T. Chetry, C. Djalali +130
The reaction using photoproduction data from the CLAS experiment at Jefferson Lab is studied. The decay of into two exclusive channel…
Observation of Beam Spin Asymmetries in the Process with CLAS12
T. B. Hayward, C. Dilks, A. Vossen +140
The observation of beam spin asymmetries in two-pion production in semi-inclusive deep inelastic scattering off an unpolarized proton target is reported. The data presented here we…
Multidimensional, high precision measurements of beam single spin asymmetries in semi-inclusive electroproduction off protons in the valence region
S. Diehl, A. Kim, G. Angelini +153
High precision measurements of the polarized electron beam-spin asymmetry in semi-inclusive deep inelastic scattering (SIDIS) from the proton have been performed using a 10.6~GeV i…
A novel way to search for light dark matter in lepton beam-dump experiments
L. Marsicano, M. Battaglieri, M. Bondì +7
A novel mechanism to produce and detect Light Dark Matter in experiments making use of GeV electrons (and positrons) impinging on a thick target (beam-dump) is proposed. The positr…
Dark photon production through positron annihilation in beam-dump experiments
L. Marsicano, M. Battaglieri, M. Bondi' +7
High energy positron annihilation is a viable mechanism to produce dark photons (). This reaction plays a significant role in beam-dump experiments using experiments usin…
Searching for a dark photon: Project of the experiment at VEPP-3
B. Wojtsekhowski, G. N. Baranov, M. F. Blinov +17
We propose an experiment to search for a new gauge boson A' in annihilation by means of a positron beam incident on a gas hydrogen target internal to the bypass at the VEP…