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SUMMARY:Double-gamma decays of double-beta decay emitters: can they be mea
 sured?
DTSTART;VALUE=DATE-TIME:20240531T105000Z
DTEND;VALUE=DATE-TIME:20240531T111000Z
DTSTAMP;VALUE=DATE-TIME:20260417T094453Z
UID:indico-contribution-23819@indico.ific.uv.es
DESCRIPTION:Speakers: Javier Menéndez ()\nRecently\, some theoretical nuc
 lear structure works have pointed out the relation between the nuclear mat
 rix elements of neutrinoless double-beta decay\, a much sought-after nucle
 ar decay that emits two matter particles without antimatter [1\,2]\, and t
 he corresponding matrix elements of double-gamma decay from the double iso
 baric analog states (DIAS) of the initial double-beta decay nuclei [3\,4].
  However\, the DIAS appear at high excitation energies\, and their double-
 gamma decay competes with faster decay channels such as particle emission 
 or single-gamma decay\, making their measurement very challenging.\n\nIn t
 his talk I will present recent results [5] comparing the width of the doub
 le-gamma decay of DIAS of double-beta emitters and these competing channel
 s\, focusing on the lightest Ti48 but also covering heavier nuclei. Our pr
 eliminary results support the feasibility of measurements of double-gamma 
 decay of DIAS\, which can provide very previous insights on the nuclear ma
 trix elements of neutrinoless double-beta decay.\n\n[1] M. Agostini\, G. B
 enato\, J. Detwiler\, J. Menéndez\, and F. Vissani\, Rev. Mod. Phys. 95 0
 25002 (2023)\n[2] J. J. Gómez-Cadenas\, J. Martı́n-Albo\, J. Menéndez\
 , M. Mezzetto\, F. Monrabal\, and\nM. Sorel\, Riv. Nuovo Cim. 46 619 (2023
 )\n[3] B. Romeo\, J. Menéndez\, and C. Peña-Garay\, Phys. Lett. B 827 13
 6965 (2022)\n[4] L. Jokiniemi and J. Menéndez\, Phys. Rev. C 107 044316 (
 2023)\n[5] B. Romeo\, D. Stramaccioni\, J. Menéndez and J.J. Valiente-Dob
 ón\, in preparation\n\nhttps://indico.ific.uv.es/event/7332/contributions
 /23819/
LOCATION:ADEIT - Valencia
URL:https://indico.ific.uv.es/event/7332/contributions/23819/
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