L. Colaneri
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Author Swipe
View article: Searching for prompt and long-lived dark photons in electroproduced <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math> pairs with the heavy photon search experiment at JLab
Searching for prompt and long-lived dark photons in electroproduced pairs with the heavy photon search experiment at JLab Open
The Heavy Photon Search experiment (HPS) at the Thomas Jefferson National\nAccelerator Facility searches for electro-produced dark photons. We report\nresults from the 2016 Engineering Run consisting of 10608/nb of data for both\nthe promp…
View article: Search for a dark photon in electroproduced <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>e</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math> pairs with the Heavy Photon Search experiment at JLab
Search for a dark photon in electroproduced pairs with the Heavy Photon Search experiment at JLab Open
Here, the Heavy Photon Search experiment took its first data in a 2015 engineering run at the Thomas Jefferson National Accelerator Facility, searching for a prompt, electro-produced dark photon with a mass between 19 and 81 MeV/$c^2$. A s…
View article: PARTONS: PARtonic Tomography Of Nucleon Software
PARTONS: PARtonic Tomography Of Nucleon Software Open
View article: First Exclusive Measurement of Deeply Virtual Compton Scattering off <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>He</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>: Toward the 3D Tomography of Nuclei
First Exclusive Measurement of Deeply Virtual Compton Scattering off : Toward the 3D Tomography of Nuclei Open
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 uses the 6 GeV electron beam from the Continuous Electron Beam Accelerator F…
Measurements of cross sections with CLAS at GeV and Open
View article: Beam-Target Helicity Asymmetry for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mover accent="true"><mml:mrow><mml:mi>γ</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">→</mml:mo></mml:mrow></mml:mover><mml:mover accent="true"><mml:mrow><mml:mi>n</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">→</mml:mo></mml:mrow></mml:mover><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup><mml:mi>p</mml:mi></mml:mrow></mml:math> in the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>N</mml:mi><mml:mo>*</mml:mo></mml:msup></mml:math> Resonance Region
Beam-Target Helicity Asymmetry for in the Resonance Region Open
We report the first beam-target double-polarization asymmetries in the $γ+ n(p) \rightarrow π^- + p(p)$ reaction spanning the nucleon resonance region from invariant mass $W$= $1500$ to $2300$ MeV. Circularly polarized photons and longitud…
View article: Measurement of two-photon exchange effect by comparing elastic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mi>e</mml:mi><mml:mo>±</mml:mo></mml:msup><mml:mi>p</mml:mi></mml:mrow></mml:math> cross sections
Measurement of two-photon exchange effect by comparing elastic cross sections Open
Background: The electromagnetic form factors of the proton measured by unpolarized and polarized electron scattering experiments show a significant disagreement that grows with the squared four-momentum transfer (Q2). Calculations have sho…
View article: Photon beam asymmetry Σ for η and η′ photoproduction from the proton
Photon beam asymmetry Σ for η and η′ photoproduction from the proton Open
View article: The Beam-Target Helicity Asymmetry for $\vec{\gamma} \vec{n} \rightarrow \pi^- p$ in the {\bf{$N^*$} Resonance Region
The Beam-Target Helicity Asymmetry for $\vec{\gamma} \vec{n} \rightarrow \pi^- p$ in the {\bf{$N^*$} Resonance Region Open
We report the first beam-target double-polarization asymmetries in the $\gamma + n(p) \rightarrow \pi^- + p(p)$ reaction spanning the nucleon resonance region from invariant mass $W$= $1500$ to $2300$ MeV. Circularly polarized photons and …
View article: The HPS experiment
The HPS experiment Open
With the experimental discovery of the Higgs boson, the Standard Model has been considered veri ed in all its previsions. The Standard Model, though, is still considered an incomplete theory, because it fails to address many theoretical an…
View article: Target and beam-target spin asymmetries in exclusive pion electroproduction for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mi>Q</mml:mi><mml:mn>2</mml:mn></mml:msup><mml:mo>></mml:mo><mml:mn>1</mml:mn></mml:mrow><mml:mo> </mml:mo><mml:msup><mml:mrow><mml:mi>GeV</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msup></mml:math>. II. <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>e</mml:mi><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:mi>e</mml:mi><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mi>p</mml:mi></mml:mrow></mml:math>
Target and beam-target spin asymmetries in exclusive pion electroproduction for . II. Open
Beam-target double-spin asymmetries and target single-spin asymmetries were measured for the exclusive pi(0) electroproduction reaction. gamma(*) p -> p pi(0), expanding an analysis of the. gamma(*) p -> n pi(+) reaction from the same expe…
View article: Target and beam-target spin asymmetries in exclusive pion electroproduction for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mi>Q</mml:mi><mml:mn>2</mml:mn></mml:msup><mml:mo>></mml:mo><mml:mn>1</mml:mn><mml:mspace width="0.16em"/><mml:msup><mml:mrow><mml:mi>GeV</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msup></mml:mrow></mml:math>. I. <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>e</mml:mi><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:mi>e</mml:mi><mml:msup><mml:mi>π</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mi>n</mml:mi></mml:mrow></mml:math>
Target and beam-target spin asymmetries in exclusive pion electroproduction for . I. Open
Beam-target double-spin asymmetries and target single-spin asymmetries were\nmeasured for the exclusive $\\pi^+$ electroproduction reaction $\\gamma^* p \\to n\n\\pi^+$. The results were obtained from scattering of 6 GeV longitudinally\npo…
View article: Exclusive <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>η</mml:mi></mml:math> electroproduction at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>W</mml:mi><mml:mo>></mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:math> GeV with CLAS and transversity generalized parton distributions
Exclusive electroproduction at GeV with CLAS and transversity generalized parton distributions Open
© 2017 American Physical Society. The cross section of the exclusive η electroproduction reaction ep→e′p′η was measured at Jefferson Laboratory with a 5.75 GeV electron beam and the CLAS detector. Differential cross sections d4σ/dtdQ2dxBdφ…
View article: Beam-target double-spin asymmetry in quasielastic electron scattering off the deuteron with CLAS
Beam-target double-spin asymmetry in quasielastic electron scattering off the deuteron with CLAS Open
The deuteron plays a pivotal role in nuclear and hadronic physics, as both the simplest bound multinucleon system and as an effective neutron target. Quasielastic electron scattering on the deuteron is a benchmark reaction to test our unde…
View article: Target and double spin asymmetries of deeply virtual π0 production with a longitudinally polarized proton target and CLAS
Target and double spin asymmetries of deeply virtual π0 production with a longitudinally polarized proton target and CLAS Open
View article: Target and beam-target spin asymmetries in exclusive <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mi>π</mml:mi><mml:mo>+</mml:mo></mml:msup></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math> electroproduction with 1.6- to 5.7-GeV electrons
Target and beam-target spin asymmetries in exclusive and electroproduction with 1.6- to 5.7-GeV electrons Open
© 2016 American Physical Society. Beam-target double-spin asymmetries and target single-spin asymmetries in exclusive π+ and quasiexclusive π- electroproduction were obtained from scattering of 1.6- to 5.7-GeV longitudinally polarized elec…
View article: Measurement of target and double-spin asymmetries for the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mover accent="true"><mml:mi>e</mml:mi><mml:mo></mml:mo></mml:mover><mml:mover accent="true"><mml:mi>p</mml:mi><mml:mo></mml:mo></mml:mover><mml:mo>→</mml:mo><mml:mi>e</mml:mi><mml:msup><mml:mi>π</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mrow><mml:mo>(</mml:mo><mml:mi>n</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math> reaction in the nucleon resonance region at low <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mi>Q</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:math>
Measurement of target and double-spin asymmetries for the reaction in the nucleon resonance region at low Open
© 2016 American Physical Society. We report measurements of target- and double-spin asymmetries for the exclusive channel e - p - →eπ+(n) in the nucleon resonance region at Jefferson Lab using the CEBAF Large Acceptance Spectrometer (CLAS)…
View article: Target and Beam-Target Spin Asymmetries in Exclusive $\pi^+$ Electroproduction for $Q^2>1$ GeV$^2$
Target and Beam-Target Spin Asymmetries in Exclusive $\pi^+$ Electroproduction for $Q^2>1$ GeV$^2$ Open
Target and beam-target spin asymmetries in exclusive $\pi^+$ electroproduction ($\gamma^* p \to n \pi^+$) were obtained from scattering of 6~GeV longitudinally polarized electrons off longitudinally polarized protons using the CEBAF Large …
View article: HD gas purification for polarized HDice targets production at Jefferson Lab
HD gas purification for polarized HDice targets production at Jefferson Lab Open
Solid, frozen-spin targets of molecular HD were rst developed for nuclear physics by a collaboration between Syracuse University and Brookhaven National Lab. They have been successfully used in measurements with photon beams, rst at the La…
View article: Photoproduction of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>f</mml:mi><mml:mn>1</mml:mn></mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:mn>1285</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math>meson
Photoproduction of themeson Open
The $f_1(1285)$ meson with mass $1281.0 \\pm 0.8$ MeV/$c^2$ and width $18.4\n\\pm 1.4$ MeV (FWHM) was measured for the first time in photoproduction from a\nproton target using CLAS at Jefferson Lab. Differential cross sections were\nobtai…
View article: Photoproduction of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi mathvariant="normal">Λ</mml:mi></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mi mathvariant="normal">Σ</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math>hyperons using linearly polarized photons
Photoproduction ofandhyperons using linearly polarized photons Open
Measurements of polarization observables for the reactions $\\vec{\\gamma} p \\rightarrow K^+ \\Lambda$ and $\\vec{\\gamma} p \\rightarrow K^+ \\Sigma^0$ have been performed. This is part of a programme of measurements designed to study th…
View article: First measurement of the helicity asymmetry E in photoproduction on the proton
First measurement of the helicity asymmetry E in photoproduction on the proton Open
View article: PARTONS: PARtonic Tomography Of Nucleon Software. A computing framework for the phenomenology of Generalized Parton Distributions
PARTONS: PARtonic Tomography Of Nucleon Software. A computing framework for the phenomenology of Generalized Parton Distributions Open
We describe the architecture and functionalities of a C++ software framework, coined PARTONS, dedicated to the phenomenology of Generalized Parton Distributions. These distributions describe the three-dimensional structure of hadrons in te…
View article: Cross Sections for the Exclusive Photon Electroproduction on the Proton and Generalized Parton Distributions
Cross Sections for the Exclusive Photon Electroproduction on the Proton and Generalized Parton Distributions Open
Unpolarized and beam-polarized fourfold cross sections (d^{4}σ/dQ^{2}dx_{B}dtdϕ) for the ep→e^{'}p^{'}γ reaction were measured using the CLAS detector and the 5.75-GeV polarized electron beam of the Jefferson Lab accelerator, for 110 (Q^{2…
View article: Precise determination of the deuteron spin structure at low to moderate<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mi>Q</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:math>with CLAS and extraction of the neutron contribution
Precise determination of the deuteron spin structure at low to moderatewith CLAS and extraction of the neutron contribution Open
In this study, 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 energies of 1.6, 2.5, 4.2 and 5.8 GeV were sca…
View article: Search for baryon-number and lepton-number violating decays of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="bold">Λ</mml:mi></mml:math>hyperons using the CLAS detector at Jefferson Laboratory
Search for baryon-number and lepton-number violating decays ofhyperons using the CLAS detector at Jefferson Laboratory Open
We present a search for ten baryon number violating decay modes of Î hyperons using the CLAS detector at Jefferson Laboratory. Nine of these decay modes result in a single meson and single lepton in the final state (Îâm) and conserve e…
View article: First measurement of the polarization observable E in the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mover accent="true"><mml:mrow><mml:mi>p</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">→</mml:mo></mml:mrow></mml:mover><mml:mo stretchy="false">(</mml:mo><mml:mover accent="true"><mml:mrow><mml:mi>γ</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">→</mml:mo></mml:mrow></mml:mover><mml:mo>,</mml:mo><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:mo stretchy="false">)</mml:mo><mml:mi>n</mml:mi></mml:math> reaction up to 2.25 GeV
First measurement of the polarization observable E in the reaction up to 2.25 GeV Open
View article: Determination of the beam-spin asymmetry of deuteron photodisintegration in the energy region<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>E</mml:mi><mml:mi>γ</mml:mi></mml:msub><mml:mo>=</mml:mo><mml:mn>1.1</mml:mn></mml:mrow></mml:math>–2.3 GeV
Determination of the beam-spin asymmetry of deuteron photodisintegration in the energy region–2.3 GeV Open
The beam-spin asymmetry, Sigma, for the reaction gamma d -> pn has been measured using the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility (JLab) for six photon-energy bins, between 1.1 and …
View article: Measurements of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>e</mml:mi><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>e</mml:mi><mml:mo>′</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mi>n</mml:mi></mml:mrow></mml:math>at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>1.6</mml:mn><mml:mo><</mml:mo><mml:mi>W</mml:mi><mml:mo><</mml:mo><mml:mn>2.0</mml:mn></mml:mrow></mml:math> GeV and extraction of nucleon resonance electrocouplings at CLAS
Measurements ofat GeV and extraction of nucleon resonance electrocouplings at CLAS Open
Differential cross sections of the exclusive process ep -> e 'pi(+)n were measured with good precision in the range of the photon virtuality Q(2) = 1.8-4.5 GeV2 and the invariant mass range of the pi(+)n final state W = 1.6-2.0 GeV using t…
View article: Assessing the performance under ionising radiation of lead tungstate scintillators for EM calorimetry in the CLAS12 Forward Tagger
Assessing the performance under ionising radiation of lead tungstate scintillators for EM calorimetry in the CLAS12 Forward Tagger Open
The well-established technology of electromagnetic calorimetry using Lead Tungstate crystals has recently seen an upheaval, with the closure of one of the most experienced large-scale suppliers of such crystals, the Bogoroditsk Technical C…