BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Longitudinal beta-decay vector coupling of nucleons and nuclear is
 ospin doublets
DTSTART;VALUE=DATE-TIME:20261030T144500Z
DTEND;VALUE=DATE-TIME:20261030T150000Z
DTSTAMP;VALUE=DATE-TIME:20261101T195902Z
UID:indico-contribution-6172@cern.ch
DESCRIPTION:Speakers: Nikita Levashko (National Research Center "Kurchatov
  Institute")\nWe study the longitudinal vector component of the weak vecto
 r current in nucleon and nuclear isospin doublets in order to determine th
 e remaining last unknown longitudinal vector coupling $g_s$ of the $\\beta
 $-decay vertex. Using the Ward identity\, we establish relationships betwe
 en the longitudinal form factors and the experimentally known Dirac form f
 actors. These relations involve the scalar form factor of the particle\, w
 hich encodes its scalar charge and scalar mean-square radius. For nucleons
 \, these quantities are evaluated within the MIT bag model and the nonrela
 tivistic oscillator quark model. The approach is then extended to nuclear 
 isospin doublets\, where scalar densities are calculated using the Deforme
 d Relativistic Hartree–Bogoliubov model in the continuum (DRHBc). The re
 sulting scalar charges and radii allow to evaluate the coupling $g_s$ for 
 nucleons and nuclei.\n\nhttps://indico.particle.mephi.ru/event/626/contrib
 utions/6172/
LOCATION: Conference Hall 3
URL:https://indico.particle.mephi.ru/event/626/contributions/6172/
END:VEVENT
END:VCALENDAR