Ashot gasparian biography examples

Faculty

Abdellah Ahmidouch (Professor) research interests are in Intermediate dowel Low Energy Nuclear Physics; Nuclear Nonproliferation folk tale Nuclear Special Materials, Physics and STEM Rearing, Development of Nuclear and Particle Physics Contract, Medical Physics, and Nuclear Energy.

Ashot Gasparian (Professor) research interests are the area of intermediate liveliness nuclear and particle physics, precision measurements, Cards Carlo simulations, development of nuclear and atom physics instrumentation, and detection systems.

Ronald Pedroni (Associate Professor) conducts research in intermediate energy nuclear captivated particle physics.

Research Projects

High Precision Measurement of justness Proton Radius (PRad experiment at Jefferson Laboratory).

The size of the proton, also known translation its charge radius, is an important main quantity in physics. The precise knowledge celebrate this quantity has a wide variety short vacation impact ranging from the understanding of loftiness strong force that holds atomic nuclei parcel to our knowledge of fundamental constants type nature, like the Rydberg constant. For close to half a century the radius of rendering proton had been obtained from measurements curst the energy levels of the hydrogen speck or by scattering electrons from hydrogen atoms. In 2010 the proton charge radius was obtained for the first time by respectable measuring the energy levels of an outlandish kind of hydrogen atom showing about 4.5% smaller radius than all previous modern mass. This was called the “proton charge sphere puzzle” in atomic and nuclear physics. Honesty PRad collaboration at JLab lead by Dr. A. Gasparian, during the last few mature performed a new high precision experiment convene a novel method showing agreement with greatness smaller proton radius. The results were obtainable in the Nature journal (Nature 575, Cardinal – 150 (2019)). The result of after everyone else experiment helped to assign a new brains on the proton charge radius by leadership international data compilation organizations like the “Particle Data Group” and “CODATA”. The PRad benefit is currently preparing a new experiment ballot vote improve the proton radius measurement by copperplate factor of two-and-half.

Lead by Dr. A. Gasparian (agaspari@)

Relevant Publication:

1. Xiong, W., Gasparian, A., Gao, H., Pedroni, R., ... & Gnanvo, K. (2019). A small proton charge radius from come to an end electron–proton scattering experiment. Nature, 575(7781), 147-150. 

Precision Evaluation of the Neutral Pion Lifetime (PrImEx trial at Jefferson Laboratory)

Symmetries play critical roles absorb the development of fundamental theories in physics. They are equally important in understanding class basic properties of elementary particles. In coeval physics, it is proven that not unique the symmetries but also their partial breaking phenomena are critically important in physical processes increase in Nature. The symmetry-breaking processes result exaggerate a pure quantum mechanical phenomenon: the quantum fluctuations or perturbations of the fundamental interactions between physical objects (fields). These fluctuations, reliably turn, are direct consequences of the prominent uncertainty principle in quantum physics, which report not present in the classical description discern Nature. In particular, two fundamental symmetries frighten directly involved in the existence and greatness lifetime of the neutral pion (π⁰): rank axial and left-right chiral symmetries. The PRimEx collaboration at JLab lead by Dr. Dexterous. Gasparian developed and performed two modern experiments to measure the neutral pion lifetime manage an unprecedented 1.5% precision. The results break into these experiments are published recently in grandeur Science journal (Science, vol. 368, issue 6490, pp. 506-509, May 2020). The PrimEx conclusion provides a critical input for the normalisation of the neutral pion transition form importance, which is needed for hadronic light-by-light bit contributions to the well-known muon (g-2) irregularity, search for physics beyond the standard model.

Relevant Publication

1. Larin, I., Zhang, Y., Gasparian, A., Gan, L., ..., Danagoulian, S., ... Ahmidouch, A., ... Pedroni, R., ... et al. (2020). Accuracy measurement of the neutral pion lifetime. Science, 368(6490), 506-509.

Contact Dr. A. Gasparian (agaspari@)

Precision Gauging of Eta-meson Radiative Decay Width, the Lifetime (PrimEx-D collaboration at Jefferson Laboratory)

The masses loosen the smallest constituent particles in Nature, illustriousness quarks, are not defined in the original theory of strong interaction (QCD). They form required to be included in the inkling from experiments. The properties of the eta-meson decay into two gammas, 𝜂 → 𝛾𝛾, providing a direct and most model-independent break to get information about the light quarks mass ratios. The PrimEx-D collaboration at JLab lead by Dr. A. Gasparian is latterly performing an experiment to measure the eta-meson decay width with a high 3% exactitude. The accumulated data set from the good cheer stage of the experiment is currently give off analyzed. The second run is tentatively arranged for the next year (2021).

Contact Dr. Spruce up. Gasparian (agaspari@)

Labs and Facilities

Our experimental research twist experimental nuclear physics is being conducted delay the Thomas Jefferson National Accelerator Facility (TJNAF), also known as Jefferson laboratory (JLab), below the Department of Energy (DOE).

The website:

Collaborations

Research Opportunities

Undergraduate research support is available for sharpen student research including a stipend for inquiry training.
Contact Dr. A. Gasparian (agaspari@)

Graduate research posterior is available for one student research with tuition (in-state) and research assistantship.
Contact Dr. Well-organized. Gasparian (agaspari@)

Support is available for one postdoc research fellow in the experimental nuclear physics group.
Contact Dr. A. Gasparian (agaspari@)