Explanipedia

New Measurements of the Deuteron-to-Proton Structure-Function Ratio Open

NULL AUTHOR_ID, F. A. Gonzalez, W. Henry, A. Karki, C. Morean , et al. · 2025

Nucleon structure functions, as measured in lepton-nucleon scattering, have historically provided a critical observable in the study of partonic dynamics within the nucleon. However, at very large parton momenta, it is both experimentally …

Scintillating glass for precision calorimetry in nuclear physics Open

T. Horn, В. В. Бердников, M. Battaglieri, M. Bondì, Ivan Amos Cali , et al. · 2025

Antidepressant Discontinuation Syndrome in Patients on SSRIs During Viral Infections: A Study of Prevalence and Mechanisms Open

M. S. Artemieva, И. Е. Данилин, A. Mkrtchyan, L. D. Osiia · 2025

Introduction This study examines the frequency and underlying mechanisms of antidepressant discontinuation syndrome (ADS) in patients receiving SSRI therapy who subsequently experience viral infections such as influenza or COVID-19. Clinic…

Investigation of Medium Modifications to $^{12}$C Structure Functions in the Resonance Region Open

S. Alsalmi, I. Albayrak, A. Ahmidouch, J. Arrington, A. Asaturyan , et al. · 2025

We present results from a high precision experimental study of the nuclear modification of the longitudinal ($F_L$) to transverse ($F_1$) structure function ratio for bound nucleons in the resonance region. The inclusive electron scatterin…

A new technical solution to the problem of increasing the resolution of X-ray diffraction methods Open

H. R. Drmeyan, S.A. Mkhitaryan, A. Mkrtchyan · 2024

A new technical solution to the problem of increasing the resolution of X-ray diffraction methods has been proposed and implemented, based on linearly enlarging the X-ray topographic patterns. For implementation of the suggested method, a …

The suitability of various recording methods and devices for registration of seismic signals Open

R. Y. Chilingaryan, H.F. Khachatryan, S.A. Mkhitaryan, M. A. Hovhannisyan, A.P. Antonyan , et al. · 2024

Analytical study and summarization of dynamic and frequency characteristics of the seismic-acoustic vibrations originated by the near and distant earthquakes and other natural and artificial seismic processes, as well as information analys…

Generation of radiation on forbidden transitions in the region of 654-658 nm in an acoustoplasmic medium Open

A. S. Abrahamyan, R. Yu. Chilingaryan, Andreas Melikyan, A. Mkrtchyan, V. A. Harutyunyan · 2023

In the region of the first positive system (FPS) band of spectrum of nitrogen in acoustoplasma, under laboratory conditions, the generation of intense lines was experimentally obtained at forbidden transitions of a singly ionized nitrogen …

Constraints on the onset of color transparency from quasielastic up to Open

D. Bhetuwal, John C. Matter, Holly Szumila-Vance, C. Ayerbe Gayoso, M. L. Kabir , et al. · 2023

Quasi-elastic scattering on ¹²C(e,e'p) was measured in Hall C at Jefferson Lab for space-like 4-momentum transfer squared Q² in the range of 8-14.2 (GeV/c)² with proton momenta up to 8.3 GeV/c. Here the exp…

Aeroionizers for Prevention of Viral Diseases Open

A. S. Abrahamyan, A. Mkrtchyan, V. E. Badoyan, R. Yu. Chilingaryan, M. A. Hakobyan , et al. · 2022

The article describes new types of air ionizers designed in the “Acoustophysics” laboratory of the Institute of Applied Problem of Physics of the National Academy of Sciences of the Republic of Armenia. These types of ionizers are created …

Opportunities for Transforming Fundamental Physics Researchinto an Innovative Product Open

V. K. Sarian, A. Mkrtchyan, Roman Meshcheryakov · 2022

Currently, humanity, our entire civilization needs long–term forecasts of emergencies and systems of individualized control of the actions of people and robots (AI systems) in the event of an emergency in order to radically reduce human an…

Coherent radiation from a chain of charged particles on a circular orbit around a dielectric ball Open

L. Sh. Grigoryan, A. Mkrtchyan, S. B. Dabagov, A. A. Saharian, V. R. Kocharyan , et al. · 2022

We investigate the electromagnetic radiation from a chain of relativistic charged particles uniformly rotating along equatorial orbit around a dielectric ball. For weak absorption of radiation in the ball material, at certain rotation freq…

High accuracy spectroscopy of 3- and 4-body Λ hypernuclei at Jefferson Lab Open

T. Gogami, P. Achenbach, T. Akiyama, D. Androić, A. Asaturyan , et al. · 2022

JLab E12-19-002 Experiment is planned to measure the Λ-binding energies of 3 Λ H [ J π = 1/2 + or 3/2 + ( T = 0)] and 4 Λ H (1 + ) at JLab Hall C. The expected accuracy for the binding-energy measurement is |Δ B total Λ | ≃ 70 keV. The acc…

Strangeness physics programs by S-2S at J-PARC Open

T. Gogami, P. Achenbach, J. K. Ahn, D. Androić, K. Aoki , et al. · 2022

In the K1.8 beam-line at Hadron Experimental Facility of J-PARC, a new magnetic spectrometer S-2S is being installed. S-2S was designed to achieve a high momentum resolution of Δ p / p = 6 × 10 −4 in FWHM. Several strangeness-physics progr…

Deeply virtual Compton scattering using a positron beam in Hall-C at Jefferson Lab Open

Andrei Afanasev, I. Albayrak, M. Alexander, M. J. Amaryan, J. R. M. Annand , et al. · 2021

Measurement of the beam-normal single-spin asymmetry for elastic electron scattering from and Open

D. Androić, David Armstrong, A. Asaturyan, K. Bartlett, R. Beminiwattha , et al. · 2021

We report measurements of the parity-conserving beam-normal single-spin elastic scattering asymmetries $B_n$ on $^{12}$C and $^{27}$Al, obtained with an electron beam polarized transverse to its momentum direction. These measurements add a…

Deeply virtual Compton scattering using a positron beam in Hall-C at\n Jefferson Lab Open

Andrei Afanasev, I. Albayrak, S. Ali, M. J. Amaryan, J. R. M. Annand , et al. · 2021

We propose to use the High Momentum Spectrometer of Hall C combined with the\nNeutral Particle Spectrometer (NPS) to perform high precision measurements of\nthe Deeply Virtual Compton Scattering (DVCS) cross section using a beam of\npositr…

Ruling out Color Transparency in Quasielastic up to of Open

D. Bhetuwal, John C. Matter, Holly Szumila-Vance, M. L. Kabir, D. Dutta , et al. · 2021

Probing the Deuteron at Very Large Internal Momenta Open

C. Yero, D. Abrams, Z. Ahmed, A. Ahmidouch, B. Aljawrneh , et al. · 2020

We measure ^{2}H(e,e^{'}p)n cross sections at 4-momentum transfers of Q^{2}=4.5±0.5 (GeV/c)^{2} over a range of neutron recoil momenta p_{r}, reaching up to ∼1.0 GeV/c. We obtain data at fixed neutron recoil angles θ_{nq}=35°, 45°, and 75°…

Precision Measurement of the Beam-Normal Single-Spin Asymmetry in Forward-Angle Elastic Electron-Proton Scattering Open

D. Androić, David Armstrong, A. Asaturyan, K. Bartlett, J. Beaufait , et al. · 2020

A beam-normal single-spin asymmetry generated in the scattering of transversely polarized electrons from unpolarized nucleons is an observable related to the imaginary part of the two-photon exchange process. We report a 2% precision measu…

Backward-angle Exclusive pi0 Production above the Resonance Region Open

W. B. Li, G. M. Huber, J. R. Stevens, K. Semenov-Tian-Shansky, L. Szymanowski , et al. · 2020

The proposed measurement is a dedicated study of the exclusive electroproduction process,1H(e,e'p)pi0, in the backward-angle regime (u-channel process) above the resonance region. The produced pi0 is emitted 180 degrees opposite to the vir…

Parity-violating inelastic electron-proton scattering at low above the resonance region Open

D. Androić, David Armstrong, A. Asaturyan, K. Bartlett, R. Beminiwattha , et al. · 2020

We report the measurement of the parity-violating asymmetry for the inelastic scattering of electrons from the proton, at $Q^2 = 0.082$ GeV$^2$ and $ W = 2.23$ GeV, above the resonance region. The result $A_{\\rm Inel} = - 13.5 \\pm 2.0 ({…

Proton form factor ratio from double spin asymmetry Open

A. Liyanage, W. Armstrong, H. Kang, J. Maxwell, J. Mulholland , et al. · 2020

We report the ratio of the electric and magnetic form factor of the proton, $\\mu_p G_E^p/G_M^p$, has been measured for elastic electron-proton scattering with polarized beam and target up to four-momentum transfer squared, $Q^2=5.66$ (GeV…

Scintillating crystals for the Neutral Particle Spectrometer in Hall C at JLab Open

T. Horn, В. В. Бердников, S. Ali, A. Asaturyan, M. Carmignotto , et al. · 2020

Measurements of Nonsinglet Moments of the Nucleon Structure Functions and Comparison to Predictions from Lattice QCD for Open

I. Albayrak, V. Mamyan, M. E. Christy, A. Ahmidouch, J. Arrington , et al. · 2019

We present extractions of the nucleon nonsinglet moments utilizing new precision data on the deuteron F_{2} structure function at large Bjorken-x determined via the Rosenbluth separation technique at Jefferson Lab Experimental Hall C. Thes…

COMPASS++/AMBER: Proposal for Measurements at the M2 beam line of the CERN SPS Phase-1: 2022-2024 Open

Bernhard W. Adams, Anosov, N. Zhuravlev, G. V. Meshcheryakov, O. Kouznetsov , et al. · 2019

The Compass++/Amber (proto-)collaboration proposes to establish a “New QCD facility at the M2 beam line of the CERN SPS” and perform in phase-1, i.e. starting in the year 2022, three experiments that will use either muons or hadrons delive…

THE USE OF INCORRECTLY POSED INVERSE PROBLEMS AND CATASTROPHE THEORY IN ACOUSTOPLASMIC STUDIES Open

A. Mkrtchyan, A.S. Abrahamyan, R.Yu. Chilingaryan, A.S. Mikayelyan, Q.G. Sahakyan · 2019

Если ток разряда в плазме содержит прямые и переменные компоненты, плазма развивает волнообразную акустическую нестабильность и в результате становится акустоплазмой. Такие неустойчивости приводят к явлениям бистабильности, мультистабильно…

Generation of surface polaritons in dielectric cylindrical waveguides Open

A. S. Kotanjyan, A. Mkrtchyan, A. A. Saharian, V. Kh. Kotanjyan · 2019

We investigate the radiation of surface polaritons by a charged particle rotating around a dielectric waveguide. The general case is considered when the waveguide is immersed in a homogeneous medium. For the evaluation of the corresponding…

Search for polarized antiproton production Open

D. Grzonka, D. Alfs, A. Asaturyan, M. Carmignotto, M. Diermaier , et al. · 2019

Revealing Color Forces with Transverse Polarized Electron Scattering Open

W. Armstrong, H. Kang, A. Liyanage, J. Maxwell, J. Mulholland , et al. · 2019

The Spin Asymmetries of the Nucleon Experiment measured two double spin asymmetries using a polarized proton target and polarized electron beam at two beam energies, 4.7 and 5.9 GeV. A large-acceptance open-configuration detector package i…

Drift chamber calibration and particle identification in the P-349 experiment Open

D. Alfs, A. Asaturyan, M. Carmignotto, M. Diermaier, W. Eyrich , et al. · 2019

The goal of the P-349 experiment is to test whether 3.5 GeV/c antiprotons produced in high-energy proton-proton collisions are polarized in view of the preparation of a polarized antiproton beam. In this article, we present the details of …

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