Publications (28)
Pseudoscalar and Scalar Meson Photoproduction Interpreted by Regge Phenomenology
Igor I. Strakovsky, William J. Briscoe, Olga Cortes Becerra +6
We have evaluated pseudoscalar and scalar neutral pion photoproduction in and above the resonance region and within Regge phenomenology. Our f…
Radiative Corrections in Super Rosenbluth Experiments
Quinn Stefan, Axel Schmidt
Super Rosenbluth experiments, elastic electron-proton scattering experiments that eschew traditional electron detection and opt instead for the detection of the recoiling proton, h…
Measuring the lepton sign asymmetry in elastic electron-proton scattering with OLYMPUS
Axel Schmidt
OLYMPUS is a particle physics experiment that collected data in 2012 at DESY, in Hamburg, Germany, on the asymmetry between positron-proton and electron-proton elastic scattering c…
Charged-averaged elastic lepton-proton scattering cross section results from OLYMPUS
Axel Schmidt
Measurements of the proton's form factor ratio made with polarization transfer show a striking discrepancy relative to the ratio extracted from unpolarized elastic electron-proton…
Short-range correlations and the charge density
Ronen Weiss, Axel Schmidt, Gerald A. Miller +1
Sophisticated high-energy and large momentum-transfer scattering experiments combined with ab-initio calculations can reveal the short-distance behavior of nucleon pairs in nuclei.…
JLab and J-PARC for the J/{\ensuremathÏ} Production at the Threshold
Igor I. Strakovsky, Jung Keun Ahn, William J. Briscoe +2
New threshold measurements for by 007 and $γ^\ast~p\to p~J/Ï\to p~(e^+e^-)$ by CLAS12 allow us to extend the previous phenomenological determinat…
Single-pion contribution to the Gerasimov--Drell--Hearn sum rule and related integrals
Igor Strakovsky, Simon Å irca, William J. Briscoe +3
Phenomenological amplitudes obtained in partial-wave analyses (PWA) of single-pion photoproduction are used to evaluate the contribution of this process to the Gerasimov-Drell-Hear…
Predicted Measurements of the Tensor-to-Scalar Transition in the CLAS12 Nuclear Targets Experiment
Erin Marshall Seroka, Axel Schmidt
Short-range correlated (SRC) nucleon pairs, which are strongly interacting nucleons at short inter-particle distances, can reveal properties of the effective nucleon-nucleon (\text…
Long Range Outlook for Short-Range Correlations
Nadia Fomin, Or Hen, Julian Kahlbow +99
Short range correlated (SRC) N N pairs are pairs of nucleons with high relative momentum (prel > kF where kF ~ 250 MeV/c is the Fermi momentum in medium to heavy nuclei) and lower…
Precision measurements of A=3 nuclei in Hall B
Or Hen, Dave Meekins, Dien Nguyen +55
We propose a high-statistics measurement of few body nuclear structure and short range correlations in quasi-elastic scattering at 6.6 GeV from H, He and H targets in H…
Is the LHCb plausible in the GlueX total cross sections ?
Igor Strakovsky, William J. Briscoe, Eugene Chudakov +4
New high-statistics total cross section data for from the GLUonic EXcitation (GlueX) experiment are fitted in a search for the exotic state observed by…
-Meson Nucleon Scattering Length from Threshold Photoproduction on Light Nuclei
Igor I. Strakovsky, William J. Briscoe, Philipp Gubler +3
The quality of recent SRC/CT Collaboration photoproduction data off a He target from Hall~D at Jefferson Laboratory, combined with the feasibility of measuring the react…
Observing short-range correlations in nuclei through photo-production
Phoebe Sharp, Axel Schmidt
Short-range correlations (SRCs) are a universal feature of nuclear structure. A wide range of measurements, primarily using electron scattering, have revealed SRC properties, such…
Determination of two-photon exchange via Scattering with CLAS12
Jan C. Bernauer, Volker D. Burkert, Ethan Cline +2
The proton elastic form factor ratio shows a discrepancy between measurements using the Rosenbluth technique in unpolarized beam and target experiments and measurements using polar…
CFNS Ad-Hoc meeting on Radiative Corrections Whitepaper
Andrei Afanasev, Jaseer Ahmed, Igor Akushevich +25
Current precision scattering experiments and even more so many experiments planed for the Electron Ion Collider will be limited by systematics. From the theory side, a fundamental…
Polarization Observables using Positron Beams
Axel Schmidt
The discrepancy between polarized and unpolarized measurements of the proton's electromagnetic form factors is striking, and suggests that two-photon exchange (TPE) may be playing…
Threshold Upsilon-meson Photoproduction at EIC and EicC
Igor I. Strakovsky, William J. Briscoe, Lubomir Pentchev +1
High-accuracy -meson photoproduction data from EIC and EicC experiments will allow the measurement of the near-threshold total cross section of the reaction , from w…
Studying the Impact of Virtuality-Dependent Nucleon Structure Modification on Spectator-Tagged Deep Inelastic Scattering
Sara Ratliff, Axel Schmidt
Measurements of deep inelastic scattering from nuclei have revealed that the partonic structure of bound nucleons differs from that of free nucleons. One hypothesis is that this st…
Short range correlations and the isospin dependence of nuclear correlation functions
Reynier Cruz-Torres, Axel Schmidt, Gerald A. Miller +5
Pair densities and associated correlation functions provide a critical tool for introducing many-body correlations into a wide-range of effective theories. Ab initio calculations s…
Strange Hadron Spectroscopy with Secondary KL Beam in Hall D
KLF Collaboration, Moskov Amaryan, Mikhail Bashkanov +150
We propose to create a secondary beam of neutral kaons in Hall D at Jefferson Lab to be used with the GlueX experimental setup for strange hadron spectroscopy. The superior CEBAF e…
Radiative Corrections: From Medium to High Energy Experiments
Andrei Afanasev, Jan C. Bernauer, Peter Blunden +16
Radiative corrections are crucial for modern high-precision physics experiments, and are an area of active research in the experimental and theoretical community. Here we provide a…
Measuring two photon exchange in elastic nuclear scattering with charge asymmetries
Tyler Kutz, Axel Schmidt
Measurements of nuclear -decay are commonly used to extract elements of the quark-mixing Cabibbo-Kobayashi-Maskawa (CKM) matrix. The precision of these measurements is currentl…
Amplitude-Based Analysis of QED Radiative Corrections to Electroproduction of -Mesons on Protons
Isabella Illari, Andrei Afanasev, William J. Briscoe +3
A formalism for radiative correction calculations in exclusive electroproduction on the proton is presented, extending the treatment developed for the pion channel. The EXCLUR…
Extended SAID Partial-Wave Analysis of Pion Photoproduction
William J. Briscoe, Axel Schmidt, Igor Strakovsky +2
A unified Chew-Mandelstam description of single-pion photoproduction data, together with pion- and eta-hadroproduction data, has been extended to include measurements carried out o…
rho-Meson Nucleon Scattering Length from CLAS Threshold Photoproduction Measurements
Igor I. Strakovsky, Evgeny L. Isupov, Victor Mokeev +1
Extending our study of the vector meson-nucleon scattering lengths (summary is given in Ref.~\cite{Strakovsky:2021vyk}), we are focusing on the -meson case using recent CLAS th…
How much two-photon exchange is needed to resolve the proton form factor discrepancy?
Axel Schmidt
One possible explanation for the proton form factor discrepancy is a contribution to the elastic electron-proton cross section from hard two-photon exchange (TPE), a typically negl…
Progress in understanding short-range structure in nuclei: an experimental perspective
John Arrington, Nadia Fomin, Axel Schmidt
High-energy electron scattering is a clean and precise probe for measurements of hadronic and nuclear structure, with a key role in understanding the role of high-momentum nucleons…
Direct TPE Measurement via Scattering at low in Hall A
Ethan Cline, Jan C. Bernauer, Axel Schmidt
The proton elastic form factor ratio can be measured either via Rosenbluth separation in an experiment with unpolarized beam and target, or via the use of polarization degrees of f…