Publications (58)
Measurements of Branching Ratios for Decays into Charged Particles
P. Adlarson, W. Augustyniak, W. Bardan +96
The WASA-at-COSY experiment has collected events with -mesons produced via the reaction at . U…
The Present and Future of QCD
P. Achenbach, D. Adhikari, A. Afanasev +400
This White Paper presents the community inputs and scientific conclusions from the Hot and Cold QCD Town Meeting that took place September 23-25, 2022 at MIT, as part of the Nuclea…
Search for the eta-mesic 4He with WASA-at-COSY detector
P. Adlarson, W. Augustyniak, W. Bardan +111
An exclusive measurement of the excitation function for the dd->3Heppi- reaction was performed at the Cooler Synchrotron COSY-Juelich with the WASA-at-COSY detection system. The da…
Form Factors and Two-Photon Exchange in High-Energy Elastic Electron-Proton Scattering
M. E. Christy, T. Gautam, L. Ou +167
We present new precision measurements of the elastic electron-proton scattering cross section for momentum transfer (Q) up to 15.75~\gevsq. Combined with existing data, these p…
Measurement of the Reaction with Polarized Beam in the Region of the Resonance
P. Adlarson, W. Augustyniak, W. Bardan +91
We report on a high-statistics measurement of the most basic double pionic fusion reaction over the energy region of the resonance by use of a…
Ruling out color transparency in quasi-elastic C(e,e'p) up to of 14.2 (GeV/c)
D. Bhetuwal, J. Matter, H. Szumila-Vance +87
Quasielastic C scattering was measured at space-like 4-momentum transfer squared ~=~8, 9.4, 11.4, and 14.2 (GeV/c), the highest ever achieved to date. Nucl…
Measurement of the Dalitz plot distribution
COSY Collaboration, P. Adlarson, W. Augustyniak +93
Using the production reactions $pd\to {}^3\mbox{He}\,Ï$ and , the Dalitz plot distribution for the decay is studied with the WASA detector at CO…
Charged kaon and proton multiplicities in semi-inclusive deep-inelastic scattering with 11 GeV electrons
P. Bosted, W. Armstrong, H. Bhatt +67
Measurements of SIDIS multiplicities for charged kaons and protons from proton and deuteron targets are reported on a grid of hadron kinematic variables and …
Backward-angle electroproduction of mesons off protons at and
T. Akiyama, P. Bydžovský, T. Gogami +83
The electroproduction of mesons from a target at , and $\cos θ^{\text{CM}}_{γ^{*}η'} \app…
Search for a dark photon in the decay
COSY Collaboration, P. Adlarson, W. Augustyniak +113
The presently world largest data sample of pi0 --> gamma e+e- decays containing nearly 5E5 events was collected using the WASA detector at COSY. A search for a dark photon U produc…
The WiFeS S7 AGN survey: Current status and recent results on NGC 6300
J. Scharwächter, M. A. Dopita, P. Shastri +14
The Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7) is a targeted survey probing the narrow-line regions (NLRs) of a representative sample of ~140 nearby (z<0.02)…
Cross section ratio and angular distributions of the reaction p + d -> 3He + eta at 48.8 MeV and 59.8 MeV excess energy
P. Adlarson, W. Augustyniak, W. Bardan +104
We present new data for angular distributions and on the cross section ratio of the p + d -> 3He + eta reaction at excess energies of Q = 48.8 MeV and Q = 59.8 MeV. The data have b…
Probing few-body nuclear dynamics via 3H and 3He (e,e'p)pn cross-section measurements
R. Cruz-Torres, D. Nguyen, F. Hauenstein +125
We report the first measurement of the \eep three-body breakup reaction cross sections in helium-3 (He) and tritium (H) at large momentum transfer ($\langle Q^2 \rangle \ap…
A Direct Detection Search for Hidden Sector New Particles in the 3-60 MeV Mass Range
A. Ahmidouch, S. Davis, A. Gasparian +57
In our quest to understand the nature of dark matter and discover its non-gravitational interactions with ordinary matter, we propose an experiment using a \pbo ~calorimeter to sea…
Isoscalar Single-Pion Production in the Region of Roper and Resonances
COSY Collaboration, P. Adlarson, W. Augustyniak +90
Exclusive measurements of the quasi-free and reactions have been performed by means of collisions at = 1.2 GeV using the WASA detector se…
Measurement of the Dalitz plot distribution
P. Adlarson, W. Augustyniak, W. Bardan +107
Dalitz plot distribution of the decay is determined using a data sample of mesons from reaction at 1 GeV collected…
The SHMS 11 GeV/c Spectrometer in Hall C at Jefferson Lab
S. Ali, A. Ahmidouch, G. R. Ambrose +72
The Super High Momentum Spectrometer (SHMS) has been built for Hall C at the Thomas Jefferson National Accelerator Facility (Jefferson Lab). With a momentum capability reaching 11…
Ï^0 Ï^0 Production in Proton-Proton Collisions at Tp=1.4 GeV
P. Adlarson, C. Adolph, W. Augustyniak +111
The reaction pp->pppi0pi0 has been investigated at a beam energy of 1.4 GeV using the WASA-at-COSY facility. The total cross section is found to be (324 +- 21_systematic +- 58_norm…
Comparing proton momentum distributions in and 3 nuclei via H H and He measurements
R. Cruz-Torres, S. Li, F. Hauenstein +125
We report the first measurement of the reaction cross-section ratios for Helium-3 (He), Tritium (H), and Deuterium (). The measurement covered a missing moment…
Quasielastic Asymmetry in the Threshold Region
M. Nycz, W. Armstrong, T. Averett +97
A measurement of the double-spin asymmetry from electron-He scattering in the threshold region of two- and three-body breakup of He was performed at Jefferson Lab, for…
Neutron-Proton Scattering in the Context of the (2380) Resonance
P. Adlarson, W. Augustyniak, W. Bardan +105
New data on quasifree polarized neutron-proton scattering, in the region of the recently observed resonance structure, have been obtained by exclusive and kinematically compl…
Probing hard/soft factorization via beam-spin asymmetry in exclusive pion electroproduction from the proton
Alicia C. Postuma, Garth M. Huber, D. J. Gaskell +76
Deep exclusive meson production (DEMP) reactions, such as , provide opportunities to study the three-dimensional structure of the nucleon through differential c…
Search for an Isospin I =3 Dibaryon
P. Adlarson, W. Augustyniak, W. Bardan +91
Various theoretical calculations based on QCD or hadronic interactions predict that in addition to the recently observed dibaryon resonance with there…
A new direct detection electron scattering experiment to search for the X17 particle
D. Dutta, H. Gao, A. Gasparian +57
A new electron scattering experiment (E12-21-003) to verify and understand the nature of hidden sector particles, with particular emphasis on the so-called X17 particle, has been a…
Search for TeV --ray emission from blazar 1ES1218+304 with TACTIC telescope during March-April 2013
K. K. Singh, K. K. Yadav, A. K. Tickoo +22
In this paper, we present results of TeV --ray observations of the high synchrotron peaked BL Lac object 1ES 1218+304 (z=0.182) with the (TeV Atmospheric Cherenkov Tel…
Investigation of the dd -> 3He n Ï0 reaction with the FZ Jülich WASA-at-COSY facility
COSY Collaboration, P. Adlarson, W. Augustyniak +112
An exclusive measurement of the dd -> 3He n Ï0 reaction was carried at a beam momentum of p = 1.2 GeV/c using the WASA-at-COSY facility. For the first time data on the total cross…
The EMC Effect of Tritium and Helium-3 from the JLab MARATHON Experiment
D. Abrams, H. Albataineh, B. S. Aljawrneh +131
Measurements of the EMC effect in the tritium and helium-3 mirror nuclei are reported. The data were obtained by the MARATHON Jefferson Lab experiment, which performed deep inelast…
A Search for the LHCb Charmed 'Pentaquark' using Photo-Production of at Threshold in Hall C at Jefferson Lab
Z. -E. Meziani, S. Joosten, M. Paolone +56
We propose to measure the photo-production cross section of near threshold, in search of the recently observed LHCb hidden-charm resonances (4380) and (4450) consi…
Precision Determination of the Neutral Weak Form Factor of Ca
D. Adhikari, H. Albataineh, D. Androic +99
We report a precise measurement of the parity-violating asymmetry in the elastic scattering of longitudinally polarized electrons from . We measure $A_{…
Differential Cross Sections for Neutron-Proton Scattering in the Region of the Dibaryon Resonance
P. Adlarson, W. Augustyniak, W. Bardan +102
Differential cross sections have been extracted from exclusive and kinematically complete high-statistics measurements of quasifree polarized scattering performed in the…
Evidence for a New Resonance from Polarized Neutron-Proton Scattering
P. Adlarson, W. Augustyniak, W. Bardan +104
Exclusive and kinematically complete high-statistics measurements of quasifree polarized scattering have been performed in the energy region of the narrow resonance stru…
Search for axion-like particles through nuclear Primakoff production using the GlueX detector
J. R. Pybus, T. Kolar, B. Devkota +40
We report on the results of the first search for the production of axion-like particles (ALP) via Primakoff production on nuclear targets using the GlueX detector. This search uses…
First Measurement of the EMC Effect in B and B
A. Karki, D. Biswas, F. A. Gonzalez +94
The nuclear dependence of the inclusive inelastic electron scattering cross section (the EMC effect) has been measured for the first time in B and B. Previous measure…
Studying the Strangeness -Term in Hall C via Exclusive Electroproduction
H. T. Klest, S. Joosten, H. Szumila-Vance +56
We propose a measurement of exclusive electroproduction of mesons near threshold in Hall C. We will measure the |t|-dependence of the exclusive electroproduction cross se…
ABC Effect and Resonance Structure in the Double-Pionic Fusion to He
P. Adlarson, W. Augustyniak, W. Bardan +100
Exclusive and kinematically complete measurements of the double pionic fusion to He have been performed in the energy region of the so-called ABC effect, which denotes a pronou…
ABC Effect in Basic Double-Pionic Fusion --- Observation of a new resonance?
P. Adlarson, C. Adolph, W. Augustyniak +116
We report on a high-statistics measurement of the basic double pionic fusion reaction over the energy region of the so-called ABC effect, a pronounced low-mass e…
The cross-section measurement for the reaction
K. N. Suzuki, T. Gogami, B. Pandey +80
The small binding energy of the hypertrition leads to predictions of non-existence of bound hypernuclei for isotriplet three-body systems such as . However, invariant mass sp…
Inclusive studies of two- and three-nucleon short-range correlations in H and He
S. Li, S. N. Santiesteban, J. Arrington +113
Inclusive electron scattering at carefully chosen kinematics can isolate scattering from the high-momentum nucleons in short-range correlations (SRCs). SRCs are produced by the har…
Flavor, transverse momentum, and azimuthal dependence of charged pion multiplicities in SIDIS with 10.6 GeV electrons
Hall C SIDIS Collaboration, P. Bosted, H. Bhatt +68
Measurements of SIDIS multiplicities for and from proton and deuteron targets are reported on a grid of hadron kinematic variables , , and for lept…
New Measurements of the Beam-Normal Single Spin Asymmetry in Elastic Electron Scattering Over a Range of Spin-0 Nuclei
PREX, CREX Collaborations, : +104
We report precision determinations of the beam normal single spin asymmetries () in the elastic scattering of 0.95 and 2.18~GeV electrons off C, Ca, Ca, a…
Accurate Determination of the Neutron Skin Thickness of Pb through Parity-Violation in Electron Scattering
D. Adhikari, H. Albataineh, D. Androic +98
We report a precision measurement of the parity-violating asymmetry in the elastic scattering of longitudinally polarized electrons from Pb. We measure $A_{PV}=550…
Revealing the short-range structure of the "mirror nuclei" H and He
S. Li, R. Cruz-Torres, N. Santiesteban +113
When protons and neutrons (nucleons) are bound into atomic nuclei, they are close enough together to feel significant attraction, or repulsion, from the strong, short-distance part…
Measurement of the Reaction in Search for the Recently Observed Resonance Structure in and systems
P. Adlarson, W. Augustyniak, W. Bardan +110
Exclusive measurements of the quasi-free reaction have been performed by means of collisions at = 1.2 GeV using the WASA detector setup at COSY. Tota…
Measurement of the Reaction in Search for the Recently Observed Resonance
P. Adlarson, W. Augustyniak, W. Bardan +99
Exclusive measurements of the quasi-free reaction have been performed by means of collisions at = 2.27 GeV using the WASA detector setup at COSY. Tot…
Flavor Dependence of Charged Pion Fragmentation Functions
H. Bhatt, P. Bosted, S. Jia +67
We have measured the flavor dependence of multiplicities for pi^+ and pi^- production in semi-inclusive deep-inelastic scattering (SIDIS) on proton and deuteron targets to explore…
Measurement of the Nucleon Structure Function Ratio by the Jefferson Lab MARATHON Tritium/Helium-3 Deep Inelastic Scattering Experiment
MARATHON Collaboration, D. Abrams, H. Albataineh +129
The ratio of the nucleon structure functions, , is determined by the MARATHON experiment from measurements of deep inelastic scattering of electrons from H a…
Constraints on the onset of color transparency from quasi-elastic C up to (GeV
D. Bhetuwal, J. Matter, H. Szumila-Vance +87
Quasi-elastic scattering on C was measured in Hall C at Jefferson Lab for space-like 4-momentum transfer squared in the range of 8--14.2\,(GeV/) with p…
Search for eta-mesic 4He in the dd->3He n pi0 and dd->3He p pi- reactions with the WASA-at-COSY facility
P. Adlarson, W. Augustyniak, W. Bardan +90
The search for 4He-eta bound states was performed with the WASA-at-COSY facility via the measurement of the excitation function for the dd->3He n pi0 and dd->3He p pi- processes. T…
ePIC Early Science Report
D. Abbott, N. Abdelrahman, S. Abhijit +781
This Early Science Report from the ePIC Collaboration outlines the compelling physics program achievable during the first years of operation of the Electron-Ion Collider (EIC), pri…
ABC Resonance Structure in the Double-Pionic Fusion to 4He
P. Adlarson, W. Augustyniak, W. Bardan +109
Exclusive and kinematically complete high-statistics measurements of the double pionic fusion reaction He have been performed in the energy range 0.8 - 1.4 GeV…
A novel measurement of the neutron magnetic form factor from A=3 mirror nuclei
S. N. Santiesteban, S. Li, D. Abrams +103
The electromagnetic form factors of the proton and neutron encode information on the spatial structure of their charge and magnetization distributions. While measurements of the pr…
Isospin Decomposition of the Basic Double-Pionic Fusion in the Region of the ABC Effect
P. Adlarson, W. Augustyniak, W. Bardan +111
Exclusive and kinematically complete high-statistics measurements of the basic double pionic fusion reactions pn -> dpi0pi0, pn -> d pi+pi- and pp -> dpi+pi0 have been carried out…
Electroproduction of the Lambda/Sigma^0 hyperons at Q^2~0.5 (GeV/c)^2 at forward angles
K. Okuyama, K. Itabashi, S. Nagao +83
In 2018, the E12-17-003 experiment was conducted at the Thomas Jefferson National Accelerator Facility (JLab) to explore the possible existence of an nnLambda state in the reconstr…
Charge Symmetry Breaking in dd->4HeÏ0 with WASA-at-COSY
COSY Collaboration, P. Adlarson, W. Augustyniak +102
Charge symmetry breaking (CSB) observables are a suitable experimental tool to examine effects induced by quark masses on the nuclear level. Previous high precision data from TRIUM…
Exclusive Measurement of the eta --> pi+ pi- gamma Decay
P. Adlarson, C. Adolph, W. Augustyniak +119
An exclusive measurement of the decay eta --> pi+ pi- gamma has been performed at the WASA facility at COSY. The eta mesons were produced in the fusion reaction pd --> 3He X at a p…
Strong Interaction Physics at the Luminosity Frontier with 22 GeV Electrons at Jefferson Lab
A. Accardi, P. Achenbach, D. Adhikari +441
This document presents the initial scientific case for upgrading the Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Lab (JLab) to 22 GeV. It is the result of a…
Near-Threshold J/ Photoproduction and the Gluonic Gravitational Form Factors of the Proton
007 Collaboration, S. Joosten, Z. -E. Meziani +56
We report on the measurement of the two-dimensional differential cross section for near-threshold J/ photoproduction from the J/-007 experiment in Hall C at Jef…
Determining the Proton's Gluonic Gravitational Form Factors
B. Duran, Z. -E. Meziani, S. Joosten +52
The proton is one of the main building blocks of all visible matter in the universe. Among its intrinsic properties are its electric charge, mass, and spin. These emerge from the c…