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SUMMARY:Distribution on electron energy in  two-neutrino  double beta deca
 y of 100Mo
DTSTART;VALUE=DATE-TIME:20220714T143000Z
DTEND;VALUE=DATE-TIME:20220714T145000Z
DTSTAMP;VALUE=DATE-TIME:20261017T220101Z
UID:indico-contribution-483@events.sinp.msu.ru
DESCRIPTION:Speakers: Sergei Semenov (National Research Centre "Kurchatov 
 Institute")\nNowadays a considerable attention is paid to experiments on t
 wo-neutrino double beta decay of stable isotopes. In large-scale projects 
 a great amount of data on 22-transitions is accumulated\, which give
 s the possibility to build the  intensity distribution on total emitted el
 ectrons energy.. These information can be used in searching for new physic
 s\, for example\, aimed at investigation of neutrino statistics [1]\, Lore
 ntz violation effects [2]\, two-neutrino double beta-decay with sterile ne
 utrinos [3].\n  In measurements\, produced with the help of  NEMO-3 detect
 or\, which is capable to reconstruct the full topology of  processes
 \,  characteristics of more than 600 000 22-decays of 100Mo have bee
 n recorded [4]. \n	In order to provide a way for new physics searches it i
 s necessary to determine the nuclear mechanism of 22-transition. In 
 the same way as for the ordinary -decay\, it is reasonale to consruct K
 urie plot for double beta-process [3].  Kurie plot has different form for 
 two kinds of 22-amplitude :  when contribution of  lowest 1+ -energy
  level of intermediate nucleus dominates - single state dominance\, SSD\, 
 and for the case of higher-states dominance\, HSD. Kurie plots for 100Mo t
 wo-neutrino double beta-decay were built for SSD mechanism with a certain 
 addition to amplitude of low-lying excited 1+ - states of intermediate nuc
 leus 100Tc [5]\, for HSD mechanism\, and for double beta--decay with emiss
 ion of sterile neutrino\, corersponding to both SSD and HSD nuclear mechan
 isms.\n\n\n\n1.	A.S. Barabash\, A.D. Dolgov\, R. Dvornicky\, F. Šimkovic\
 , A.Yu. Smirnov\, Nucl. Phys. 783\, 90 (2007) \n2.	O. Nitescu et al\, J. P
 hys. G 47\,  55112 (2021)\n3.	P.B. Bolton\, F.F. Deppisch\, L.Graf\, F Ši
 mkovic Phys. Rev. D  103\, 055019 (2021)\n4.	R. Arnold et al\,  (NEMO-3 Co
 llaboration) Eur. J. Phys. C 79\, 440 (2019)\n5.	S.V. Semenov\, Phys. Part
 .  Nucl.  48\, 1018 (2017) \;\n      S.V. Semenov. Phys. Part.  Nucl.\, 49
 \, 698 (2018)\n\nhttps://events.sinp.msu.ru/event/8/contributions/483/
LOCATION: Физический ф-т\, ауд. 5-42
URL:https://events.sinp.msu.ru/event/8/contributions/483/
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