# Neutrino 2018 - XXVIII International Conference on Neutrino Physics and Astrophysics

4-9 June 2018
Heidelberg
Europe/Berlin timezone
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# Contribution Poster 0vbb

Poster (not participating in poster prize competition)

# Measurement of Quenched Axial Vector Coupling Constant in In-115 Beta Decay and its Impact on Future 0$\nu\beta\beta$ Searches

## Speakers

• Mr. Alexander LEDER

## Session and Location

Monday Session, Poster Wall #82 (Auditorium Gallery Left)

## Abstract content

0$\nu\beta\beta$ is a nuclear process under investigation by numerous experiments, which if detected would demonstrate that neutrinos are Majorana particles. 0$\nu\beta\beta$ samples a wide range of intermediate forbidden nuclear transitions, which are governed by the quenched axial vector coupling constant ($g_A^{eff}$), the uncertainty of which plays a pivotal role in the uncertainty of the nuclear matrix elements. The recently reexamined role of $g_A^{eff}$ in these transitions has prompted measurements of $g_A^{eff}$ in highly forbidden decays via beta shape investigation with high resolution and low threshold bolometers. In this poster, we present measurements performed on an $LiInSe_{2}$ bolometer, with a 4th order forbidden decay spectrum in In-115. This decay is sensitive to similar nuclear effects as 0$\nu\beta\beta$. We will discuss the obtained results along with possible impacts this study has for future 0$\nu\beta\beta$ measurements.

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