Speaker: Dr. Roberts Craig
Date and Time
April 26, 2017, 12:30 hours.
Boulevard Belisario Domínguez, Kilómetro 1081, Sin Número,
Terán Tuxtla Gutiérrez, Chiapas, México, C.P. 29050.
Sala de Usos multiples de la Biblioteca Central de la UNACH
MCTP, UNACH, CONACYT, ICTP y UMSNH
MCTP y UNACH
The 2013 Nobel Prize in Physics was awarded to Peter Higgs and Francois
Englert following discovery of the Higgs boson at the Large Hadron Collider.
With this discovery the Standard Model of Particle Physics became
complete. Its formulation and verification are a remarkable story. However,
the most important chapter is the least understood.
Quantum Chromodynamics (QCD) is that part of the Standard Model which
is supposed to describe all of nuclear physics and yet, fifty years after the
discovery of quarks, we are only just beginning to understand how QCD
builds the basic bricks for nuclei: pions, neutrons, protons. Critically, the
Higgs boson is often said to give mass to everything. However, that is
wrong. It only gives mass to some very simple particles, accounting for only
one or two percent of the mass of more complex things like atoms,
molecules and everyday objects. The vast majority of mass is an emergent
feature of QCD, contained fundamentally in Nambu's share of the 2008
Nobel Prize. Its appearance appears simultaneously to forever imprison
quarks within the proton, preventing them from escaping to directly trigger
detection. Contemporary and future terrestrial experiments are capable of
verifying these notions and thereby completing the book on the Standard Model.