C. Salgado

Measurement of single- and double-polarization observables in the photoproduction of $I ¨ ^{+} I ¨ ^{-}$ ~meson pairs off the proton using CLAS at Jefferson Laboratory

P. Roy, S. Cao, V. Crede +141

The photoproduction of $I ¨ ^{+} I ¨ ^{-}$ meson pairs off the proton has been studied in the reaction $I^^{3} p \to p I ¨ ^{+} I ¨ ^{-}$ using the CEBAF Large Acceptance Spectrometer (CLAS) and the froz…

nucl-ex2024

Measurement of Spin-Density Matrix Elements in $I ¨ (770)$ Production with a Linearly Polarized Photon Beam at $E_{I^}^{3} = 8.2 - 8.8 GeV$

GlueX Collaboration, S. Adhikari, F. Afzal +150

The GlueX experiment at Jefferson Lab studies photoproduction of mesons using linearly polarized $8.5 GeV$ photons impinging on a hydrogen target which is contained within…

Extraction of beam-spin asymmetries from the hard exclusive $I ¨ ^{+}$ channel off protons in a wide range of kinematics

S. Diehl, K. Joo, A. Kim +135

We have measured beam-spin asymmetries to extract the $sin I ¨ $ moment $A_{LU}^{s i n I ¨ }$ from the hard exclusive $e p \to e^{'} n I ¨ ^{+}$ reaction above the resonance region,…

First Exclusive Measurement of Deeply Virtual Compton Scattering off $^{4}$ He: Toward the 3D Tomography of Nuclei

M. Hattawy, N. A. Baltzell, R. DuprÃ© +157

We report on the first measurement of the beam-spin asymmetry in the exclusive process of coherent deeply virtual Compton scattering off a nucleus. The experiment used the 6 GeV el…

nucl-ex2015

First Measurement of the Polarization Observable E in the $p (I^^{3}, I ¨ ^{+}) n$ Reaction up to 2.25 GeV

S. Strauch, W. J. Briscoe, M. DÃ¶ring +165

First results from the longitudinally polarized frozen-spin target (FROST) program are reported. The double-polarization observable E, for the reaction $I^^{3} p \to I ¨ ^{+} n$ , h…

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…

hep-ex2012

Measurement of Exclusive $I ¨ ^{0}$ Electroproduction Structure Functions and their Relationship to Transversity GPDs

CLAS Collaboration, I. Bedlinskiy, V. Kubarovsky +151

Exclusive $I ¨ ^{0}$ electroproduction at a beam energy of 5.75 GeV has been measured with the Jefferson Lab CLAS spectrometer. Differential cross sections were measured at more than 1…

astro-ph.SR2016

Scl-1013644: a CEMP-s star in the Sculptor Dwarf Spheroidal Galaxy

C. Salgado, G. S Da Costa, D. Yong +1

Recent studies of the Milky Way and its satellites have paid special attention to the importance of carbon-enhanced metal-poor (CEMP) stars due to their involvement in Galactic for…

Measurement of the Total Compton Scattering Cross Section between 6.5 and 11 GeV

GlueX Collaboration, F. Afzal, C. S. Akondi +148

The total cross section for Compton scattering off atomic electrons, $Î³+e\rightarrowÎ³'+e'$, was measured using photons with energies between 6.5 and 11.1 GeV incident on a $^{9}$ Be…

Deep exclusive $I ¨ ^{+}$ electroproduction off the proton at CLAS

K. Park, M. Guidal, R. W. Gothe +153

The exclusive electroproduction of $I ¨ ^{+}$ above the resonance region was studied using the $CEBAF$ Large Acceptance Spectrometer ( $CLAS$ ) at Jefferson Laboratory by scatt…

nucl-ex2014

Exclusive $I ¨ ^{0}$ electroproduction at $W > 2$ GeV with CLAS

I. Bedlinskiy, V. Kubarovsky, S. Niccolai +143

Exclusive neutral-pion electroproduction ( $e p \to e^{'} p^{'} I ¨ ^{0}$ ) was measured at Jefferson Lab with a 5.75-GeV electron beam and the CLAS detector. Differential cross sect…

nucl-ex2015

Determination of the Beam-Spin Asymmetry of Deuteron Photodisintegration in the Energy Region $E_{I^}^{3} = 1.1 - 2.3$ GeV

Nicholas Zachariou, Yordanka Ilieva, Nikolay Ya. Ivanov +140

The beam-spin asymmetry, $I^£$ , for the reaction $I^^{3} d \to p n$ has been measured using the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelera…

physics.plasm-ph2018

Generation of high energy laser-driven electron and proton sources with the 200 TW system VEGA 2 at the Centro de Laseres Pulsados

L. Volpe, R. Fedosejevs, G. Gatti +23

The Centro de Laseres Pulsados in Salamanca Spain has recently started operation phase and the first User access period on the 6 J 30 fs 200 TW system (VEGA 2) already started at t…

Near Threshold Neutral Pion Electroproduction at High Momentum Transfers and Generalized Form Factors

P. Khetarpal, P. Stoler, I. G. Aznauryan +157

We report the measurement of near threshold neutral pion electroproduction cross sections and the extraction of the associated structure functions on the proton in the kinematic ra…

Observation of azimuth-dependent suppression of hadron pairs in electron scattering off nuclei

S. J. Paul, S. Moran, M. Arratia +142

We present the first measurement of di-hadron angular correlations in electron-nucleus scattering. The data were taken with the CLAS detector and a 5.0 GeV electron beam incident o…

hep-ex2021

Differential cross sections for Î(1520) using photoproduction at CLAS

U. Shrestha, T. Chetry, C. Djalali +130

The reaction $I^^{3} p \to K^{+} I^ (1520)$ using photoproduction data from the CLAS $g 12$ experiment at Jefferson Lab is studied. The decay of $I^ (1520)$ into two exclusive chan…

astro-ph.SR2019

An investigation of C, N and Na abundances in red giant stars of the Sculptor dwarf spheroidal galaxy

C. Salgado, G. S. Da Costa, J. E. Norris +1

The origin of the star-to-star abundance variations found for the light elements in Galactic globular clusters (GGCs) is not well understood, which is a significant problem for ste…

Transverse Polarization of $I^£^{+} (1189)$ in Photoproduction on a Hydrogen Target in CLAS

C. S. Nepali, M. Amaryan, K. P. Adhikari +143

Experimental results on the $I^£^{+} (1189)$ hyperon transverse polarization in photoproduction on a hydrogen target using the CLAS detector at Jefferson laboratory are presented. The…

nucl-ex2023

Beam Spin Asymmetry Measurements of Deeply Virtual $I ¨ ^{0}$ Production with CLAS12

A. Kim, S. Diehl, K. Joo +154

The new experimental measurements of beam spin asymmetry were performed for the deeply virtual exclusive $I ¨ ^{0}$ production in a wide kinematic region with the photon virtualities $…

nucl-ex2021

Polarized Structure Function $I ¨ _{L T^{'}}$ from $I ¨ ^{0} p$ Electroproduction Data in the Resonance Region at $0.4$ GeV $^{2} < Q^{2} < 1.0$ GeV $^{2}$

E. L. Isupov, V. D. Burkert, A. A. Golubenko +138

The first results on the $I ¨ _{L T^{'}}$ structure function in exclusive $I ¨ ^{0} p$ electroproduction at invariant masses of the final state of 1.5 GeV $<$ $W$ $<$ 1.8 GeV and in the range…

Measurement of Spin Density Matrix Elements in $I^ (1520)$ Photoproduction at 8.2-8.8 GeV

GlueX Collaboration, S. Adhikari, C. S. Akondi +143

We report on the measurement of spin density matrix elements of the $I^ (1520)$ in the photoproduction reaction $I^^{3} p \to I^ (1520) K^{+}$ , via its subsequent decay to $K^{-} p$ . T…

Beam-Recoil Transferred Polarization in $K^{+} Y$ Electroproduction in the Nucleon Resonance Region with CLAS12

D. S. Carman, A. D'Angelo, L. Lanza +138

Beam-recoil transferred polarizations for the exclusive electroproduction of $K^{+} I^$ and $K^{+} I^£^{0}$ final states from an unpolarized proton target have been measured using the CLAS1…

Measurement of Target and Double-spin Asymmetries for the $e p \to e I ¨ ^{+} (n)$ Reaction in the Nucleon Resonance Region at Low $Q^{2}$

X. Zheng, K. P. Adhikari, P. Bosted +147

We report measurements of target- and double-spin asymmetries for the exclusive channel $e p \to e I ¨ ^{+} (n)$ in the nucleon resonance region at Jefferson Lab using the CEBAF…

nucl-ex2010

Tensor Correlations Measured in 3He(e,e'pp)n

H. Baghdasaryan, L. B. Weinstein, J. M. Laget +124

We have measured the 3He(e,e'pp)n reaction at an incident energy of 4.7 GeV over a wide kinematic range. We identified spectator correlated pp and pn nucleon pairs using kinematic…

Multidimensional, high precision measurements of beam single spin asymmetries in semi-inclusive $I ¨ ^{+}$ 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…

hep-ex2020

Beam spin asymmetry in semi-inclusive electroproduction of a hadron pair

M. Mirazita, H. Avakian, A. Courtoy +140

A first measurement of the longitudinal beam spin asymmetry ALU in the semi-inclusive electroproduction of pairs of charged pions is reported. ALU is a higher-twist observable and…

First measurement of the helicity asymmetry $E$ in $I^\cdot$ photoproduction on the proton

I. Senderovich, B. T. Morrison, M. Dugger +148

Results are presented for the first measurement of the double-polarization helicity asymmetry E for the $I^\cdot$ photoproduction reaction $I^^{3} p \to I^\cdot p$ . Data were obtained usin…

Beam Asymmetry $I^£$ for the Photoproduction of $I^\cdot$ and $I^\cdot^{'}$ Mesons at $E_{I^}^{3} = 8.8$ GeV

The GlueX Collaboration, S. Adhikari, A. Ali +131

We report on the measurement of the beam asymmetry $I^£$ for the reactions $I^^{3} p \to p I^\cdot$ and $I^^{3} p \to p I^\cdot^{'}$ from the GlueX experiment, using an 8.2--8…

physics.ins-det2014

A study of decays to strange final states with GlueX in Hall D using components of the BaBar DIRC

The GlueX Collaboration, M. Dugger, B. Ritchie +103

We propose to enhance the kaon identification capabilities of the GlueX detector by constructing an FDIRC (Focusing Detection of Internally Reflected Cherenkov) detector utilizing…

Demonstration of a novel technique to measure two-photon exchange effects in elastic $e^{\pm} p$ scattering

M. Moteabbed, M. Niroula, B. A. Raue +147

The discrepancy between proton electromagnetic form factors extracted using unpolarized and polarized scattering data is believed to be a consequence of two-photon exchange (TPE) e…

Beam-Target Helicity Asymmetry $E$ in $K^{0} I^$ and $K^{0} I^£^{0}$ Photoproduction on the Neutron

CLAS Collaboration, D. H. Ho, R. A. Schumacher +146

We report the first measurements of the $E$ beam-target helicity asymmetry for the $I^^{3} n \to K^{0} I^$ , and $K^{0} I^£^{0}$ channels in the energy range 1.70 $\leq W \leq$ 2.34…

Target and Double Spin Asymmetries of Deeply Virtual $I ¨ ^{0}$ Production with a Longitudinally Polarized Proton Target and CLAS

A. Kim, H. Avakian, V. Burkert +126

The target and double spin asymmetries of the exclusive pseudoscalar channel $e p \to e p I ¨ ^{0}$ were measured for the first time in the deep-inelastic regime using a longitud…

nucl-ex2015

Precise Determination of the Deuteron Spin Structure at Low to Moderate $Q^{2}$ with CLAS and Extraction of the Neutron Contribution

N. Guler, R. G. Fersch, S. E. Kuhn +126

We present the final results for the deuteron spin structure functions obtained from the full data set collected with Jefferson Lab's CLAS in 2000-2001. Polarized electrons with en…

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…

nucl-ex2024

Measurement of Spin-Density Matrix Elements in $I^^{++} (1232)$ photoproduction

F. Afzal, C. S. Akondi, M. Albrecht +146

We measure the spin-density matrix elements (SDMEs) of the $I^^{++} (1232)$ in the photoproduction reaction $I^^{3} p \to I ¨ ^{-} I^^{++} (1232)$ with the GlueX experiment in Hall D at Jeffer…

Photoproduction of $I^\cdot$ mesons off the proton for $1.2 < E_{I^}^{3} < 4.7$ GeV using CLAS at Jefferson Laboratory

T. Hu, Z. Akbar, V. Crede +148

Photoproduction cross sections are reported for the reaction $I^^{3} p \to p I^\cdot$ using energy-tagged photons and the CLAS spectrometer at Jefferson Laboratory. The $I^\cdot$ mesons are detecte…

nucl-ex2026

Measurement of the nucleon spin structure functions for 0.01< $Q^{2}$ <1 GeV $^{2}$ using CLAS

A. Deur, S. E. Kuhn, M. Ripani +147

The spin structure functions of the proton and the deuteron were measured during the EG4 experiment at Jefferson Lab in 2006. Data were collected for longitudinally polarized elect…

nucl-ex2014

Precision measurements of $g_{1}$ of the proton and the deuteron with 6 GeV electrons

Y. Prok, P. Bosted, N. Kvaltine +160

The inclusive polarized structure functions of the proton and deuteron, g1p and g1d, were measured with high statistical precision using polarized 6 GeV electrons incident on a pol…

Photon beam asymmetry $I^£$ for $I^\cdot$ and $I^\cdot^{'}$ photoproduction from the proton

P. Collins, B. G. Ritchie, M. Dugger +140

Measurements of the linearly-polarized photon beam asymmetry $I^£$ for photoproduction from the proton of $I^\cdot$ and $I^\cdot^{'}$ mesons are reported. A linearly-polarized tagged photo…

astro-ph.GA2022

Evidence of globular cluster abundance anomalies in the SMC intermediate-age cluster Kron 3

C. Salgado, G. S. Da Costa, D. Yong +5

Using spectra obtained with the VLT/FORS2 and Gemini-S/GMOS instruments we have investigated carbon, nitrogen and sodium abundances in a sample of red giants in the Small Magellani…

nucl-ex2008

Nuclear Targets for a Precision Measurement of the Neutral Pion Radiative Width

P. Martel, E. Clinton, R. McWilliams +60

A technique is presented for precision measurements of the area densities, density * T, of approximately 5% radiation length carbon and 208Pb targets used in an experiment at Jeffe…

Target and Beam-Target Spin Asymmetries in Exclusive $I ¨ ^{+}$ and $I ¨ ^{-}$ Electroproduction with 1.6 to 5.7 GeV Electrons

P. E. Bosted, A. S. Biselli, S. Careccia +159

Beam-target double spin asymmetries and target single-spin asymmetries in exclusive $I ¨ ^{+}$ and $I ¨ ^{-}$ electroproduction were obtained from scattering of 1.6 to 5.7 GeV longitudinal…

Studying Short-Range Correlations with Real Photon Beams at GlueX

O. Hen, M. Patsyuk, E. Piasetzky +59

The past few years has seen tremendous progress in our understanding of short-range correlated (SRC) pairing of nucleons within nuclei, much of it coming from electron scattering e…

nucl-ex2021

Measurement of beam asymmetry for $I ¨ ^{-} I^^{++}$ photoproduction on the proton at $E_{I^}^{3}$ =8.5 GeV

GlueX Collaboration, S. Adhikari, C. S. Akondi +134

We report a measurement of the $I ¨ ^{-}$ photoproduction beam asymmetry for the reaction $I^^{3} p \to I ¨ ^{-} I^^{++}$ using data from the GlueX experiment in the photon beam en…

Measurement of the neutron F2 structure function via spectator tagging with CLAS

N. Baillie, S. Tkachenko, J. Zhang +147

We report on the first measurement of the F2 structure function of the neutron from semi-inclusive scattering of electrons from deuterium, with low-momentum protons detected in the…

astro-ph.SR2013

Spectroscopy of blue horizontal branch stars in NGC 6656 (M22)

C. Salgado, C. Moni Bidin, S. Villanova +2

Recent investigations revealed very peculiar properties of blue horizontal branch (HB) stars in ÏCentauri, which show anomalously low surface gravity and mass compared to other cl…

Measurement of the Photon Beam Asymmetry in $I^^{3} p \to K^{+} I^£^{0}$ at $E_{I^}^{3} = 8.5$ GeV

The GlueX Collaboration, S. Adhikari, A. Ali +124

We report measurements of the photon beam asymmetry $I^£$ for the reaction $I^^{3} p \to K^{+} I^£^{0}$ (1193) using the GlueX spectrometer in Hall D at Jefferson Lab. Data were collected u…

Semi-Inclusive $I ¨ _{0}$ target and beam-target asymmetries from 6 GeV electron scattering with CLAS

S. Jawalkar, S. Koirala, H. Avakian +160

We present precision measurements of the target and beam-target spin asymmetries from neutral pion electroproduction in deep-inelastic scattering (DIS) using the CEBAF Large Accept…

nucl-ex2014

Induced polarization of Î(1116) in kaon electroproduction

M. Gabrielyan, B. A. Raue, D. S. Carman +132

We have measured the induced polarization of the $I^ (1116)$ in the reaction $e p \to e^{'} K^{+} I^$ , detecting the scattered $e^{'}$ and $K^{+}$ in the final state along with the proton…

Measurement of Beam-Recoil Observables $C_{x}$ and $C_{z}$ for $K^{+} I^$ Photoproduction

CLAS Collaboration, S. Adhikari, B. A. Raue +154

Exclusive photoproduction of $K^{+} I^$ final states off a proton target has been an important component in the search for missing nucleon resonances and our understanding of the pro…

nucl-ex2010

Near-threshold Photoproduction of Phi Mesons from Deuterium

X. Qian, W. Chen, H. Gao +144

We report the first measurement of the differential cross section on $I ¨ $ -meson photoproduction from deuterium near the production threshold for a proton using the CLAS detector an…

hep-ex2024

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…

First measurement of near-threshold J/ $I ¨ $ exclusive photoproduction off the proton

The GlueX Collaboration, A. Ali, M. Amaryan +132

We report on the measurement of the $I^^{3} p \to J / I ¨ p$ cross section from $E_{I^}^{3} = 11.8$ GeV down to the threshold at $8.2$ GeV using a tagged photon beam with the GlueX experim…

Evidence for the Onset of Color Transparency in $I ¨ ^{0}$ Electroproduction off Nuclei

L. El Fassi, L. Zana, K. Hafidi +154

We have measured the nuclear transparency of the incoherent diffractive $A (e, e^{'} I ¨ ^{0})$ process in $^{12}$ C and $^{56}$ Fe targets relative to $^{2}$ H using a 5 GeV electron beam. The n…

First Measurement of $a_{2}^{0} (1320)$ Polarized Photoproduction Cross Section

GlueX Collaboration, F. Afzal, C. S. Akondi +149

We measure for the first time the differential photoproduction cross section $d I ¨ / d t$ of the $a_{2} (1320)$ meson at an average photon beam energy of 8.5~GeV, using data with an integ…

physics.ins-det2020

The GlueX Beamline and Detector

S. Adhikari, C. S. Akondi, H. Al Ghoul +187

The GlueX experiment at Jefferson Lab has been designed to study photoproduction reactions with a 9-GeV linearly polarized photon beam. The energy and arrival time of beam photons…

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…

First Results from The GlueX Experiment

The GlueX Collaboration, H. Al Ghoul, E. G. Anassontzis +108

The GlueX experiment at Jefferson Lab ran with its first commissioning beam in late 2014 and the spring of 2015. Data were collected on both plastic and liquid hydrogen targets, an…

physics.plasm-ph2019

Towards an in situ, full-power gauge of the focal-volume intensity of petawatt-class lasers

C. Z. He, A. Longman, J. A. PÃ©rez-HernÃ¡ndez +7

About 50 years ago, Sarachick and Schappert [Phys. Rev. D. 1, 2738 (1970)] showed that relativistic Thomson scattering leads to wavelength shifts that are proportional to the laser…

hep-ex2008

Search for the photo-excitation of exotic mesons in the pi+pi+pi- system

M. Nozar, C. Salgado, D. P. Weygand +2

A search for exotic mesons in the $I ¨ ^{+} I ¨ ^{+} I ¨ ^{-}$ system photoproduced by the charge exchange reaction $I^^{3} p \to I ¨ ^{+} I ¨ ^{+} I ¨ ^{-} (n)$ was carried out by the CLAS collaboration…

Recoil Polarization in $K^{+} Y$ Electroproduction in the Nucleon Resonance Region with CLAS12

D. S. Carman, A. D'Angelo, L. Lanza +127

Hyperon recoil polarization measurements for the exclusive electroproduction of $K^{+} I^$ and $K^{+} I^£^{0}$ final states from an unpolarized proton target have been carried out using the…

physics.plasm-ph2015

Determination of the species generated in atmospheric-pressure laser-induced plasmas by mass spectrometry techniques

F. Valle, C. Salgado, J. I. ApiÃ±aniz +6

We present temporal information obtained by mass spectrometry techniques about the evolution of plasmas generated by laser filamentation in air. The experimental setup used in this…

nucl-ex2010

A New Measurement of the $I ¨ ^{0}$ Radiative Decay Width

I. Larin, D. McNulty, E. Clinton +70

High precision measurements of the differential cross sections for $I ¨ ^{0}$ photoproduction at forward angles for two nuclei, $^{12}$ C and $^{208}$ Pb, have been performed for inciden…

hep-ex2025

Inclusive Electron Scattering in the Resonance Region off a Hydrogen Target with CLAS12

V. Klimenko, D. S. Carman, R. W. Gothe +135

Inclusive electron scattering cross sections off a hydrogen target at a beam energy of 10.6 GeV have been measured with data collected from the CLAS12 spectrometer at Jefferson Lab…

Exploring the Structure of the Bound Proton with Deeply Virtual Compton Scattering

M. Hattawy, N. A. Baltzell, R. DuprÃ© +125

In the past two decades, deeply virtual Compton scattering of electrons has been successfully used to advance our knowledge of the partonic structure of the free proton and investi…

Differential Cross Section Measurements for $I^^{3} n \to I ¨ ^{-} p$ Above the First Nucleon Resonance Region

P. T. Mattione, D. S. Carman, I. I. Strakovsky +145

The quasi-free $I^^{3} d \to I ¨ ^{-} p (p)$ differential cross section has been measured with CLAS at photon beam energies $E_{I^}^{3}$ from 0.445 GeV to 2.510 GeV (corresponding to $W$ from 1.311…

Measurement of the proton spin structure at long distances

X. Zheng, A. Deur, H. Kang +148

Measuring the spin structure of protons and neutrons tests our understanding of how they arise from quarks and gluons, the fundamental building blocks of nuclear matter. At long di…

Double $K_{S}^{0}$ Photoproduction off the Proton at CLAS

S. Chandavar, J. T. Goetz, K. Hicks +124

The $f_{0}$ (1500) meson resonance is one of several contenders to have significant mixing with the lightest glueball. This resonance is well established from several previous experim…

nucl-ex2023

First Measurement of $I^$ Electroproduction off Nuclei in the Current and Target Fragmentation Regions

T. Chetry, L. El Fassi, W. K. Brooks +151

We report results of $I^$ hyperon production in semi-inclusive deep-inelastic scattering off deuterium, carbon, iron, and lead targets obtained with the CLAS detector and the Conti…

An initial study of mesons and baryons containing strange quarks with GlueX

The GlueX Collaboration, A. AlekSejevs, S. Barkanova +97

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 $I^^{3} p$ collisions. Recent l…

hep-ex2011

Precise Measurements of Beam Spin Asymmetries in Semi-Inclusive $I ¨ ^{0}$ production

M. Aghasyan, H. Avakian, P. Rossi +151

We present studies of single-spin asymmetries for neutral pion electroproduction in semi-inclusive deep-inelastic scattering of 5.776 GeV polarized electrons from an unpolarized hy…

Measurement of the beam asymmetry $I^£$ and the target asymmetry $T$ in the photoproduction of $I ¨ $ mesons off the proton using CLAS at Jefferson Laboratory

P. Roy, Z. Akbar, S. Park +143

The photoproduction of $I ¨ $ mesons off the proton has been studied in the reaction $I^^{3} p \to p I ¨ $ using the CEBAF Large Acceptance Spectrometer (CLAS) and the frozen-spin target (F…

hep-ph2015

Analysis Tools for Next-Generation Hadron Spectroscopy Experiments

M. Battaglieri, B. J. Briscoe, A. Celentano +44

The series of workshops on New Partial-Wave Analysis Tools for Next-Generation Hadron Spectroscopy Experiments was initiated with the ATHOS 2012 meeting, which took place in Camogl…

nucl-ex2021

Measurement of deeply virtual Compton scattering off Helium-4 with CLAS at Jefferson Lab

We report on the measurement of the beam spin asymmetry in the deeply virtual Compton scattering off $^{4}$ He using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab us…

Measurement of the Q^2 Dependence of the Deuteron Spin Structure Function g_1 and its Moments at Low Q^2 with CLAS

K. P. Adhikari, A. Deur, L. El Fassi +145

We measured the $g_{1}$ spin structure function of the deuteron at low $Q^{2}$ , where QCD can be approximated with chiral perturbation theory ( $I ¨ $ PT). The data cover the resonance r…

Measurement of the helicity asymmetry $E$ in $I ¨ \to I ¨ ^{+} I ¨ ^{-} I ¨ ^{0}$ photoproduction

Z. Akbar, P. Roy, S. Park +131

The double-polarization observable $E$ was studied for the reaction $I^^{3} p \to p I ¨ $ using the CEBAF Large Acceptance Spectrometer (CLAS) in Hall B at the Thomas Jefferson National Acc…

hep-ex2023

First measurement of hard exclusive $I ¨ ^{-} I^^{++}$ electroproduction beam-spin asymmetries off the proton

S. Diehl, N. Trotta, K. Joo +142

The polarized cross section ratio $I ¨ _{L T^{'}} / I ¨ _{0}$ from hard exclusive $I ¨ ^{-} I^^{++}$ electroproduction off an unpolarized hydrogen target has been extracted based on beam-spin…

hep-ex2021

Improved $I^ p$ 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…

Probing the core of the strong nuclear interaction

A. Schmidt, J. R. Pybus, R. Weiss +162

The strong nuclear interaction between nucleons (protons and neutrons) is the effective force that holds the atomic nucleus together. This force stems from fundamental interactions…

First results on nucleon resonance photocouplings from the $I^^{3} p \to I ¨ ^{+} I ¨ ^{-} p$ reaction

CLAS Collaboration, E. Golovatch, V. D. Burkert +127

We report the first experimental measurements of the nine 1-fold differential cross sections for the $I^^{3} p \to I ¨ ^{+} I ¨ ^{-} p$ reaction, obtained with the CLAS detector at Jefferson Labo…

Exclusive $I^\cdot$ electroproduction at $W > 2$ GeV with CLAS and transversity generalized parton distributions

CLAS Collaboration, I. Bedlinskiy, V. Kubarovsky +144

The cross section of the exclusive $I^\cdot$ electroproduction reaction $e p \to e^{'} p^{'} I^\cdot$ was measured at Jefferson Lab with a 5.75-GeV electron beam and the CLAS detector. D…

hep-ex2010

Measurement of Single and Double Spin Asymmetries in Deep Inelastic Pion Electroproduction with a Longitudinally Polarized Target

The CLAS Collaboration, H. Avakian, P. Bosted +145

We report the first measurement of the transverse momentum dependence of double spin asymmetries in semi-inclusive production of pions in deep inelastic scattering off the longitud…

Upper Limit on the Photoproduction Cross Section of the Spin-Exotic $I ¨ _{1} (1600)$

GlueX Collaboration, F. Afzal, C. S. Akondi +147

The spin-exotic hybrid meson $I ¨ _{1} (1600)$ is predicted to have a large decay rate to the $I ¨ I ¨ I ¨ $ final state. Using 76.6~pb $^{- 1}$ of data collected with the GlueX detector, we…

hep-ex2015

A search for baryon- and lepton-number violating decays of $I^$ hyperons using the CLAS detector at Jefferson Laboratory

M. E. McCracken, M. Bellis, K. P. Adhikari +128

We present a search for ten baryon-number violating decay modes of $I^$ hyperons using the CLAS detector at Jefferson Laboratory. Nine of these decay modes result in a single meson…

Measurement of two-photon exchange effect by comparing elastic $e^{\pm} p$ cross sections

D. Rimal, D. Adikaram, B. A. Raue +142

[Background] The electromagnetic form factors of the proton measured by unpolarized and polarized electron scattering experiments show a significant disagreement that grows with th…

nucl-ex2026

Measurements of $I^_{v}^{3} p \to I ¨ ^{+} I ¨ ^{-} p^{'}$ Cross Sections with the CLAS Detector for $Q^{2}$ from 2.0--5.0~GeV $^{2}$ and $W$ from 1.400--2.125~GeV

A. Trivedi, R. W. Gothe, E. Phelps +122

Observables in the electroproduction of the $I ¨ ^{+} I ¨ ^{-} p$ reaction channel off the proton that are sensitive to the polarization of the virtual photon are presented for the first tim…

cond-mat.mes-hall2016

Electronic Transport in Gadolinium Atomic-Size Contacts

B. Olivera, C. Salgado, J. L. Lado +6

We report on the fabrication, transport measurements, and density functional theory (DFT) calculations of atomic size contacts made out of gadolinium (Gd). Gd is known to have loca…

Photon beam asymmetry $I^£$ in the reaction $I^^{3} p \to p I ¨ $ for $E_{I^}^{3}$ = 1.152 to 1.876 GeV

CLAS Collaboration, P. Collins, B. G. Ritchie +147

Photon beam asymmetry $I^£$ measurements for $I ¨ $ photoproduction in the reaction $I^^{3} p \to I ¨ p$ are reported for photon energies from 1.152 to 1.876 GeV. Data were taken using…

nucl-ex2023

Exclusive $I ¨ ^{-}$ Electroproduction off the Neutron in Deuterium in the Resonance Region

Y. Tian, R. W. Gothe, V. I. Mokeev +140

New results for the exclusive and quasi-free cross sections off neutrons bound in deuterium $I^_{v}^{3} n (p) \to p I ¨ ^{-} (p)$ are presented over a wide final state hadron angle ra…

Measurement of charged-pion production in deep-inelastic scattering off nuclei with the CLAS detector

S. Moran, R. Dupre, H. Hakobyan +141

Background: Energetic quarks in nuclear DIS propagate through the nuclear medium. Processes that are believed to occur inside nuclei include quark energy loss through medium-stimul…

nucl-ex2024

Measurement of the J/ $I ¨ $ photoproduction cross section over the full near-threshold kinematic region

GlueX Collaboration, S. Adhikari, F. Afzal +150

We report the total and differential cross sections for $J / I ¨ $ photoproduction with the large acceptance GlueX spectrometer for photon beam energies from the threshold at 8.2~GeV u…

Measurement of the beam asymmetry $I^£$ for $I ¨ ^{0}$ and $I^\cdot$ photoproduction on the proton at $E_{I^}^{3} = 9$ GeV

GlueX Collaboration, H. Al Ghoul, E. G. Anassontzis +123

We report measurements of the photon beam asymmetry $I^£$ for the reactions $I^^{3} p \to p I ¨ ^{0}$ and $I^^{3} p \to p I^\cdot$ from the GlueX experiment using a 9 GeV linearly-polarized, tagge…

cond-mat.mes-hall2020

Atomic-scale control of graphene magnetism using hydrogen atoms

H. GonzÃ¡lez-Herrero, J. M. GÃ³mez-RodrÃguez, P. Mallet +7

Isolated hydrogen atoms absorbed on graphene are predicted to induce magnetic moments. Here we demonstrate that the adsorption of a single hydrogen atom on graphene induces a magne…

hep-ex2026

Measurement of the near-threshold J $/ I ¨ $ photoproduction cross section with the CLAS12 experiment

P. Chatagnon, V. Kubarovsky, R. Paremuzyan +147

We present measurements of the total and differential cross sections for near-threshold J/ $I ¨ $ photoproduction obtained with the CLAS12 detector at the Thomas Jefferson National Ac…

The Beam-Target Helicity Asymmetry for $I^^{3} n \to I ¨ ^{-} p$ in the {\bf{ $N^{*}$ } Resonance Region

D. Ho, P. Peng, C. Bass +140

We report the first beam-target double-polarization asymmetries in the $I^^{3} + n (p) \to I ¨ ^{-} + p (p)$ reaction spanning the nucleon resonance region from invariant mass $W$ = $1…

First Measurements of the Double-Polarization Observables $F$ , $P$ , and $H$ in $I ¨ $ Photoproduction off Transversely Polarized Protons in the $N^{*}$ Resonance Region

P. Roy, S. Park, V. Crede +145

First measurements of double-polarization observables in $I ¨ $ photoproduction off the proton are presented using transverse target polarization and data from the CEBAF Large Accept…

hep-ex2023

A multidimensional study of the structure function ratio $I ¨ _{L T^{'}} / I ¨ _{0}$ from hard exclusive $I ¨ ^{+}$ electro-production off protons in the GPD regime

S. Diehl, A. Kim, K. Joo +151

A multidimensional extraction of the structure function ratio $I ¨ _{L T^{'}} / I ¨ _{0}$ from the hard exclusive $e p \to e^{'} n I ¨ ^{+}$ reaction above the resonance region has been…