A. Gasparian

activity

19982026

most citedThe ratio of proton's electric to magnetic form factors measured by polarization transfer

735 citations · 4.4k across the 79 of their papers we have counts for

collaborators

Showing hep-exShow all

13 papers · 1 filter

hep-ex2026

Sensitivity of a Missing-Mass Search for a Light Dark Photon with a Positron Beam on a Hydrogen Target

Weizhi Xiong, Ashot Gasparian, Bogdan Wojtsekhowski

We present a Geant4-based simulation study of the sensitivity to a light dark photon, $A^{'}$ , using a positron beam incident on a thin liquid-hydrogen target and a high-resolution fo…

hep-ex2021★ 12 cited

Search for photoproduction of axion-like particles at GlueX

GlueX Collaboration, S. Adhikari, C. S. Akondi +142

We present a search for axion-like particles, $a$ , produced in photon-proton collisions at a center-of-mass energy of approximately 4 GeV, focusing on the scenario where the $a$ -gl…

hep-ex2012★ 7 cited

A study of meson and baryon decays to strange final states with GlueX in Hall D (A proposal to the 39th Jefferson Lab Program Advisory Committee)

The GlueX Collaboration, M. Dugger, B. Ritchie +76

The primary motivation of the GlueX experiment is to search for and ultimately study the pattern of gluonic excitations in the meson spectrum produced in gamma p collisions. Recent…

hep-ex2011★ 320 cited

Search for a new gauge boson in the $A^{'}$ 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 $α^{'}$ to electrons. Such a particle $A^{'}$ can be produced in electron-…

hep-ex2009★ 41 cited

Photoproduction of $π^{+} π^{-}$ meson pairs on the proton

M. Battaglieri, R. De Vita, A. P. Szczepaniak

The exclusive reaction $γ p \to p π^{+} π^{-}$ was studied in the photon energy range 3.0 - 3.8 GeV and momentum transfer range $0.4 < - t < 1.0$ GeV $^{2}$ . Data were collected with the CLAS d…

hep-ex2006★ 56 cited

Search for the $Θ^{+}$ pentaquark in the reactions $γ p \to K ˉ^{0} K^{+} n$ and $γ p \to K ˉ^{0} K^{0} p$

R. De Vita, M. Battaglieri, V. Kubarovsky +9

The exclusive reactions $γ p \to K ˉ^{0} K^{+} n$ and $γ p \to K ˉ^{0} K^{0} p$ have been studied in the photon energy range 1.6--3.8 GeV, searching for evidence of the exotic baryon $…

hep-ex2006★ 13 cited

Search for $Θ^{++}$ Pentaquarks in the Exclusive Reaction $γ p \to K^{+} K^{-} p$

V. Kubarovsky, M. Battaglieri, R. De Vita +6

The reaction $γ p \to p K^{+} K^{-}$ was studied at Jefferson Lab with photon energies from 1.8 to 3.8 GeV using a tagged photon beam. The goal was to search for a $Θ^{++}$ pentaquark, a…

hep-ex2006★ 94 cited

Search for the $Θ^{+}$ pentaquark in the reaction $γ d \to p K^{-} K^{+} n$

B. McKinnon, K. Hicks

A search for the \thp in the reaction $γ d \to p K^{-} K^{+} n$ was completed using the CLAS detector at Jefferson Lab. A study of the same reaction, published earlier, reported the observ…

hep-ex2005★ 78 cited

Search for $Θ^{+} (1540)$ pentaquark in high statistics measurement of $γ p \to K ˉ^{0} K^{+} n$ at CLAS

M. Battaglieri, R. De Vita, V. Kubarovsky +5

The exclusive reaction $γ p \to K ˉ^{0} K^{+} n$ was studied in the photon energy range between 1.6-3.8 GeV searching for evidence of the exotic baryon $Θ^{+} (1540) \to n K^{+}$ . The decay…

hep-ex2004

Virtual Compton Scattering in the Resonance Region Up to the Deep Inelastic Region at Backward Angles and Momentum Transfer Squared of Q2=1.0 GeV2

G. Laveissiere

We have made the first measurements of the virtual Compton scattering process via the e p -> e p gamma exclusive reaction at Q**2 = 1 GeV**2 in the nucleon resonance region. The cr…

hep-ex2003★ 82 cited

Q^2 Evolution of the Neutron Spin Structure Moments using a He-3 Target

010 Collaboration, M. Amarian, L. Auerbach +2

We have measured the spin structure functions $g_{1}$ and $g_{2}$ of $^{3}$ He in a double-spin experiment by inclusively scattering polarized electrons at energies ranging from 0.862 to…

hep-ex2001★ 96 cited

Nuclear transparency from quasielastic A(e,e'p) reactions uo to Q^2=8.1 (GeV/c)^2

K. Garrow

The quasielastic (e,e $^{'}$ p) reaction was studied on targets of deuterium, carbon, and iron up to a value of momentum transfer $Q^{2}$ of 8.1 (GeV/c) $^{2}$ . A nuclear transparency…

hep-ex1999★ 1 cited

Electron Beam MØller Polarimeter at Jlab Hall a

A. V. Glamazdin, V. G. Gorbenko, L. G. Levchuk +13

As part of the spin physics program at Jefferson Laboratory (JLab), a Møller polarimeter was developed to measure the polarization of electron beam of energies 0.8 to 5.0 GeV. A un…

Sensitivity of a Missing-Mass Search for a Light Dark Photon with a Positron Beam on a Hydrogen Target

Search for photoproduction of axion-like particles at GlueX

A study of meson and baryon decays to strange final states with GlueX in Hall D (A proposal to the 39th Jefferson Lab Program Advisory Committee)

Search for a new gauge boson in the A′ Experiment (APEX)

Photoproduction of π+π− meson pairs on the proton

Search for the Θ+ pentaquark in the reactions γp→Kˉ0K+n and γp→Kˉ0K0p

Search for Θ++ Pentaquarks in the Exclusive Reaction γp→K+K−p

Search for the Θ+ pentaquark in the reaction γd→pK−K+n

Search for Θ+(1540) pentaquark in high statistics measurement of γp→Kˉ0K+n at CLAS

Virtual Compton Scattering in the Resonance Region Up to the Deep Inelastic Region at Backward Angles and Momentum Transfer Squared of Q**2=1.0 GeV**2