Contents
xv
21 Mirror Symmetric Weak Force and Neutrino Mass
155
21.1 Neutrino Mass-Mirror Symmetry Breaking
Connection
156
21.2 Majorana Neutrinos
158
21.3 Seesaw and Majorana Neutrino Mass
160
21.4 Testing Majorana Nature of Neutrinos
in Experiments
162
22 Hints of Other New Physics from Neutrino Mass
165
22.1 Mirror Universe Versus Left–Right Symmetry: Two
Paths to Parity
165
22.2 Grand Unification of Forces and Matter
167
22.3 What if Neutrinos Are not Majorana Fermions?
169
23 The Origin of Matter and Neutrinos
171
23.1 Enter Sakharov
172
23.2 The Search for Baryon Number Violation
174
23.3 Neutrino Seesaw and Baryon Asymmetry
177
24 Dark Universe
179
24.1 Dark Matter and Galaxies
181
24.2 What is the Dark Matter?
182
24.3 Is There a Parallel Universe?
184
24.4 Are There Sterile Neutrinos?
185
24.5 Can We Communicate with the Mirror World?
187
25 Neutrinos from Heavenly Sources
189
25.1 Why Look for Neutrinos from Extra-Solar Sources
and Extra-Galactic Sources
190
25.2 Supernova Neutrinos
191
25.3 Neutrinos Observed in the IceCube Experiment in
the South Pole
192
Part IV
195
26 Anthropic Principle
197
26.1 Why Go Anthropic?
197