SAIP2015

Monte Carlo simulations to obtain the weak magnetism term for ²²Na beta decay

1 Jul 2015, 09:40

20m

Oral Presentation Track B - Nuclear, Particle and Radiation Physics NPRP

Speaker

Mr Lutendo Phuthu (University of the Western Cape)

Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)

Yes

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

The study of ²²Na beta decay offers an opportunity to test the Standard Model via measurements of the β-γ angular correlation. A previous measurement of this correlation yielded a non-zero value, indicating the need for a higher-order correlation to the decay, beyond the allowed V-A approximation. On assuming the Conserved Vector Current (CVC) hypothesis for weak interactions and using the magnetic dipole M1 width of the analog 2₁⁺ state in ²²Na, one obtains an unexpectedly large "second-class" form factor that is in disagreement with the Standard Model prediction

This talk describes an analysis of data obtained from a prior ²¹Ne(p,γ) experiment to obtain the M1 width of the 2₁⁺ state of interest in ²²Na. We aim to use the M1 width and an independent measurement of the β-γ angular correlation to obtain a higher order Standard-Model-allowed weak magnetism term, in an attempt to explain the observed discrepancy mentioned above. I will also describe some Monte Carlo simulations performed to extract E2/M1 mixing ratio from these data.

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

Yes

Main supervisor (name and email)<br>and his / her institution

Prof Smarajit Triambak
smarajit@gmail.com
University of the Western Cape

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

MSc

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

No