Nghiên cứu tương tác của hệ nhiều hạt trong hạt nhân nguyên tử 3H và 3He qua phép đo tiết diện tán xạ (e,e’p)

Starts: 12 August, 2020

Ends: 12 August, 2020

Address:

Online/zoom

Summary:

We will have a webinar from Dr. Dien Nguyen, MIT & J-Lab on July 3rd (Friday) 10:00~ GMT+7, regarding to their recent publication
The title and abstract are included in the following. We are interested in this work because there is a strong connection between neutrino vs. electron interaction model in which the current & future neutrino program depends on it to explore the physics such as CP violation, mass hierarchy…Some connection can be found at Neutrino 2020 talk last week.
Title: Probing few-body nuclear dynamics vis 3H and 3He (e,e’p)pn cross-section
Abstract: “In this presentation we will report the first measurement of the (e,e’p) three-body breakup reaction cross sections in helium-3 (3He) and tritium (3H) at large momentum transfer (Q 2  ~ 1.9 (GeV/c)2) and (x> 1) kinematics, where the cross section should be sensitive to quasielastic (QE) scattering from single nucleons. The data cover missing momenta 40 < pmiss < 500 MeV/c that, in the QE limit with no rescattering, equals the initial momentum of the probed nucleon. The measured cross sections are compared with state-of-the-art ab-initio calculations. Overall good agreement, within _20%, is observed between data and calculations for the full pmiss range for 3H and for 100 < pmiss < 350 MeV/c for 3He. Including the effects of rescattering of the outgoing nucleon improves agreement with the data at pmiss > 250 MeV/c and suggests contributions from charge-exchange (SCX) rescattering. The isoscalar sum of 3He plus 3H, which is largely insensitive to SCX, is described by calculations to within the accuracy of the data over the entire pmiss range. This validates current models of the ground state of the three-nucleon system up to very high initial nucleon momenta of 500 MeV/c.”

Event url: http://ifirse.icise.vn/event/webinar-probing-few-body-nuclear-dynamics-vis-3h-and-3he-eeppn-cross-section/  

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Time: July 3rd (Friday), 10:00~11:30 GMT+7
Meeting ID: 818 7254 0539
Password: 17072017