SelectedWorks - Keith Griffioen

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Selected Works of Keith Griffioen

Professor of Physics

Keith Griffioen's research interests are Experimental nuclear and particle physics.

Works
About

About Keith Griffioen

Keith Griffioen's research interests are Experimental nuclear and particle physics.

Present	Professor of Physics, William & Mary ‐ Physics Department
Institution Organization Position Type Position Title Time Period to Options Current Position Affiliate my profile with this Institution

Physics

Articles (20)

Article

First Measurement of Hard Exclusive π − Δ + + Electroproduction Beam-Spin Asymmetries ...

Physical Review Letters (2023)

S. Diehl, Keith Griffioen and CLAS Collaboration

The polarized cross-section ratio σLT′/σ0 from hard exclusive π−Δ++ electroproduction off an unpolarized hydrogen target has been extracted based on beam-spin asymmetry measurements using ...

Link

Article

Searching for prompt and long-lived dark photons in electroproduced e ...

Physical Review D (2023)

P. H. Adrian, . ..., Keith Griffioen and et al.

The heavy photon search experiment (HPS) at the Thomas Jefferson National Accelerator Facility searches for electroproduced dark photons. We report ...

Link

Article

Observation of large missing-momentum (e,e′p) cross-section scaling and ...

Physical Review C (2023)

I. Korover, Keith Griffioen and CLAS Collaboration

We report the measurement of xB scaling in (e,e′p) cross-section ratios off nuclei relative to deuterium at large missing momentum of 350≤pmiss≤600 MeV/c. The observed scaling extends ...

Link

Article

First CLAS12 Measurement of Deeply Virtual Compton Scattering Beam-Spin Asymmetries ...

Physical Review Letters (2023)

G. Christiaens, Keith Griffioen and CLAS Collaboration

Deeply virtual Compton scattering (DVCS) allows one to probe generalized parton distributions describing the 3D structure of the nucleon. We ...

Link

Article

A multidimensional study of the structure function ratio σLT /σ0 ...

Physical Letters B (2023)

S. Diehl, A. Kim, . ..., Keith Griffioen, et al.

A multidimensional extraction of the structure function ratio σLT /σ0 from the hard exclusive ep → enπ+ reaction above the ...

Link

Article

Alignment of the CLAS12 central hybrid tracker with a Kalman ...

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment (2023)

S. J. Paul, A. Peck, . ..., Keith Griffioen, et al.

Several factors can contribute to the difficulty of aligning the sensors of tracking detectors, including a large number of modules, ...

Link

Article

First Measurement of Λ Electroproduction off Nuclei in the Current ...

Physical Review Letters (2023)

T. Chetry, Keith Griffioen and CLAS Collaboration

We report results of Λ hyperon production in semi-inclusive deep-inelastic scattering off deuterium, carbon, iron, and lead targets obtained with the ...

Link

Article

Exclusive π− electroproduction off the neutron in deuterium in the ...

Physical Review C (2023)

Y. Tian, Keith Griffioen and CLAS Collaboration

New results for the exclusive and quasifree cross sections off neutrons bound in deuterium γvn(p)→pπ−(p) are presented over a wide final state hadron ...

Link

Article

Observation of Correlations between Spin and Transverse Momenta in Back-to-Back ...

Physical Review Letters (2023)

H. Avakian, Keith Griffioen and CLAS Collaboration

We report the first measurements of deep inelastic scattering spin-dependent azimuthal asymmetries in back-to-back dihadron electroproduction in the deep inelastic ...

Link

Article

Observation of Azimuth-Dependent Suppression of Hadron Pairs in Electron Scattering ...

Physical Review Letters (2022)

S. J. Paul, Keith Griffioen and CLAS Collaboration

We present the first measurement of dihadron angular correlations in electron-nucleus scattering. The data were taken with the CLAS detector ...

Link

Article

Beam-recoil transferred polarization in K+Y electroproduction in the nucleon ...

Physical Review C (2022)

D. S. Carman, Keith Griffioen and CLAS Collaboration

Beam-recoil transferred polarizations for the exclusive electroproduction of K+Λ and K+Σ0 final states from an unpolarized proton target have been measured using the CLAS12 ...

Link

Article

Beam-spin asymmetry E for E− hyperon photoproduction off the neutron

Physical Letters B (2022)

Keith Griffioen and CLAS Collaboration

We report a new measurement of the beam-spin asymmetry, , for the γn → K +− reaction usingquasi-free neutrons in ...

Link

Article

Polarized structure function σLT′ from π0p electroproduction data in the ...

Physical Review C (2022)

Keith Griffioen and CLAS Collaboration

The first results on the σLT′ structure function in exclusive π0p electroproduction at invariant masses of the final state of 1.5GeV<W<1.8GeV and in the range of ...

Link

Article

Measurement of charged-pion production in deep-inelastic scattering off nuclei with ...

Physical Review C (2022)

S. Moran, Keith Griffioen and CLAS Collaboration

Background: Energetic quarks in nuclear deep-inelastic scattering propagate through the nuclear medium. Processes that are believed to occur inside nuclei include ...

Link

Article

First Measurement of Timelike Compton Scattering

Physical Review Letters (2021)

P. Chatagnon, Keith Griffioen and CLAS Collaboration

We present the first measurement of the timelike Compton scattering process, γp→p′γ∗(γ∗→e+e−), obtained with the CLAS12 detector at Jefferson Lab. The ...

Link

Article

Improved Λ p Elastic Scattering Cross Sections between 0.9 ...

Physical Review Letters (2021)

Keith Griffioen, J. Rowley and CLAS Collaboration

Strange matter is believed to exist in the cores of neutron stars based on simple kinematics. If this is true, ...

Link

Article

Electron-beam energy reconstruction for neutrino oscillation measurements

Nature (2021)

M. Khachatryan, A. Papadopoulou, . ..., Keith Griffioen, et al.

Neutrinos exist in one of three types or ‘flavours’—electron, muon and tau neutrinos—and oscillate from one flavour to another when ...

Link

Article

Measurement of deeply virtual Compton scattering off 4He with the ...

Physical Review C (2021)

R. Dupre, Keith Griffioen and CLAS Collaboration

We report on the measurement of the beam spin asymmetry in the deeply virtual Compton scattering off 4He using the CEBAF Large ...

Link

Article

Double polarisation observable G for single pion photoproduction from the ...

Physical Letters B (2021)

Keith Griffioen and CLAS Collaboration

We report measurements of π+ and π0 meson photoproduction from longitudinally spin-polarised protons by an energy tagged (0.73-2.3 GeV) and ...

Link

Article

Measurement of the proton spin structure at long distances

Nature Physics (2021)

X. Zheng, A. Deur, . ..., Keith Griffioen, et al.

Measuring the spin structure of protons and neutrons tests our understanding of how they arise from quarks and gluons, the ...

Link

About Keith Griffioen

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Articles (20)