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There is a mathematical theory, known as the standard model,
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Classroom Contents
The Universe: Big and Small by Ashoke Sen
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- 1 Kaapi With Kuriosity
- 2 ICTS Campus
- 3 ICTS and its Mandate
- 4 ICTS Research
- 5 ICTS Programs
- 6 ICTS Outreach
- 7 ICTS Outreach - Kaapi with Kuriosity
- 8 Introduction to Speaker
- 9 [The Universe: Big and Small by Ashoke Sen]
- 10 Elementary particle physics
- 11 The small
- 12 Modern understanding of the ultimate constituents of matter
- 13 These elementary particles interact via various kinds
- 14 These forces give rise to complicated interaction between elementary particles
- 15 For examples
- 16 Result
- 17 For developing a theory of elementary particles and their forces, we must remember two important points:
- 18 There is a mathematical theory, known as the standard model,
- 19 List of elementary particles according to the 'standard model'
- 20 Despite these successes, the standard model cannot be the final story.
- 21 However these can be explained by minor modifications of the standard model without giving up of any of the basic principles
- 22 However, even with these modifications standard model will not be complete
- 23 Can we modify the standard model so as to include gravity?
- 24 The first step - making gravity consistent with special theory of relativity
- 25 The big
- 26 Cosmology
- 27 Since an expanding radiation cools, the obvious conclusion is that the universe was hotter in the past.
- 28 When the universe was very hot, it was filled with very energetic elementary particles colliding with each other
- 29 However since we know that the standard model is not the complete story about elementary particles
- 30 There is another big puzzle in cosmology
- 31 For example
- 32 The radiation originated
- 33 A possible answer: Inflation
- 34 What is responsible for such a rapid expansion of the universe?
- 35 Moving forward....
- 36 Summary of main points so far:
- 37 Since gravity is so difficult to incorporate
- 38 Basic ingredients of the standard model and its modifications
- 39 Basic postulate of String Theory
- 40 Typical size os a string ~ 10-33 cm
- 41 It turns out that one of the vibrational states of the string acts as the mediator of gravitational force
- 42 Furthermore the requirement of mathematical consistency completely fixes the underlying laws of string theory
- 43 The uniqueness of string theory
- 44 Summary
- 45 Q/A
