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SUMMARY:A. Leoncini - Crystal scintillators for high precision beta spectr
 oscopy: the GAIAS experiment
DTSTART:20260709T120000Z
DTEND:20260709T140000Z
DTSTAMP:20260815T064100Z
UID:indico-event-53006@agenda.infn.it
CONTACT:info-seminars@lngs.infn.it
DESCRIPTION:Speakers: Izabela Anna Kochanek (Istituto Nazionale di Fisica 
 Nucleare)\, Nicola Rossi (Istituto Nazionale di Fisica Nucleare)\, Dounia 
 Helis (Istituto Nazionale di Fisica Nucleare)\, Valerio D'Andrea (Istituto
  Nazionale di Fisica Nucleare)\n\nAbstract\nThe determination of the effec
 tive axial-vector coupling constant 𝑔A in nuclear media is a major open
  problem in contemporary neutrino and nuclear physics. Its deviation from 
 the free-nucleon value directly affects the interpretation of neutrinoless
  double beta decay (0𝜈𝛽𝛽) searches through the associated nuclear
  matrix elements\, and therefore impacts the extraction of constraints on 
 the Majorana neutrino mass scale and other parameters in models that allow
  for lepton number violation. The GAIAS (GAxIal Analysis with Scintillator
 s) experiment addresses this problem through high-precision beta spectrosc
 opy of forbidden non-unique beta decays using high optical quality and low
 -background crystal scintillators. These decays exhibit a strong sensitivi
 ty of the beta spectral shape to 𝑔A\, especially at low energies\, maki
 ng them a powerful probe of nuclear models that describes weak interaction
 s in nuclei.The experiment is being installed at the underground Gran Sass
 o National Laboratory (LNGS) of INFN\, where the ultra-low-background envi
 ronment enables high-statistics measurementsunder highly stable conditions
 . Particular attention will be devoted to crystal growth and isotope incor
 poration techniques. GAIAS aims to provide very precise beta spectrum meas
 urement\, improving constraints on the effective axial coupling constant a
 nd to strengthen the role of functional crystalline materials in frontier 
 research at the interface of nuclear\, particle\, and astroparticle physic
 s.--------------AuthorsLeoncini\, AliceAgnihotri\, AagrahAtzori Corona\, M
 attiaBelli\, PierluigiBussolotti\, AndreaCappella\, FabioCaracciolo\, Vinc
 enzoCerulli\, RiccardoDanevich\, FedorGiarnetti\, AlessioIncicchitti\, Ant
 onellaKasperovych\, DmytroKlavdiienko\, VolodymyrKobychev\, VladislavKotil
 a\, JenniMattei\, AngeloMerlo\, VittorioRamalho\, MarlomSuhonen\, JouniTre
 tyak\, Volodymyr\n------------SpeakerAlice LeonciniDipartimento di Fisica\
 , Università di Roma "Tor Vergata”INFN Roma 2\n----------IMPORTANT: reg
 istration is mandatory for people without a valid LNGS badge. Deadline for
  registration is July 8\, 2026 at 3:00 pm CEST.\n \n \n\nhttps://agenda.
 infn.it/event/53006/
LOCATION:Room B. Rossi (LNGS)
URL:https://agenda.infn.it/event/53006/
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