GUWAHATI, Nov 24 - The Physics Academy of North East (PANE), a platform for research scholars and Physics-enthusiasts of the North-east, organised a lecture titled ‘The Enigma of Mass’ on Tuesday, said a press release today.
The lecture organised in association with the Department of Physics, Handique Girls’ College, was delivered by Prof Amitava Raychaudhuri, the recipient of the Shanti Swarup Bhatnagar Award in 1997 and the Professor Emeritus in Calcutta University.
In his lecture, Prof Raychaudhuri discussed the enigma of the origin of masses of fundamental particles like quark and leptons, which are the basic building blocks of all matters in the universe.
In a lucid manner, he explained the standard model of Particle Physics and elaborated how symmetries play a vital role in solving the mystery of generation of masses of fundamental subatomic particles.
He explained how masses of W and Z bosons and all the fundamental particles can be generated by the spontaneous breaking of electroweak symmetry, augmented by Higgs mechanism.
Prof Raychaudhuri said how such a breakdown of spontaneous symmetry in Glashow-Weinberg-Salam Theory requires the existence of a new particle, called the Higgs boson, which was first predicted by British theoretical physicist Peter Higgs in 1964 and subsequently discovered by ATLAS and CMS experiments at the Large Hadron Collider (LHC) in July 2012.
He explained how about 80 per cent of the mass of the universe is made up of dark matter, the all-pervading mystery substance which is invisible to the human eyes.
He elucidated how a mysterious property of space known as dark energy causes the universe to expand faster and faster.
Earlier, Dr Utpal Dutta, Principal of the College, addressed the audience. Dr Anuradha Das Purakayastha, the HoD of Physics of Handique Girls’ College, welcomed the audience.
This was followed by the address of Dr Bipul Bhuyan, general secretary, PANE. Mukesh Sahay, Assam Police DGP, also attended the occasion as invited guest.