IISER Pune
INDIAN INSTITUTE OF SCIENCE EDUCATION AND RESEARCH (IISER) PUNE
where tomorrow’s science begins today
An Autonomous Institution, Ministry of Human Resource Development, Govt. of India
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Seminars and Colloquia

Physics

Do the Fundamental Constants change with Time ? 
 
Mon, Jan 22, 2018,   04:20 PM at Physics Seminar Room 31, 2nd Floor, Main Building

Prof. Nissim Kanekar
NCRA-TIFR, Pune

Abstract:
 
Temporal evolution in low-energy fundamental constants such as the 
fine structure constant and the proton-electron mass ratio is a generic 
prediction of field theories that attempt to unify the Standard Model 
of particle physics and general relativity. The exciting possibility of 
low-energy tests of such unification theories has inspired a number of 
methods to probe fundamental constant evolution on a range of timescales, 
from years to billions of years. Astrophysical studies of redshifted spectral 
lines provide a powerful probe of such putative changes in the low-energy 
fundamental constants across a large fraction of the age of the Universe. 
After reviewing the current state of the field, I will focus on two techniques, 
based on radio spectral lines from the hydroxyl and methanol molecules detected in high-redshift galaxies, and will describe new high-sensitivity results from these methods. Finally, if time permits, I will discuss present 
limitations of such studies and the improvements that are likely to be 
possible with the advent of new experimental and observational facilities 
over the next decade.
 

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