What Was the Temperature of the Universe When a Typical

question 67

Essay

What was the temperature of the universe when a typical CBR photon was no longer able to spontaneously create a proton and antiproton pair? Note that a photon has an energy equal to ,the CBR at any point in time has a blackbody spectrum that peaks at ,and the mass of a single proton is .

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Definitions:

Two-Tail Test

A statistical test that considers extreme values in both tails of the distribution to test for a significant difference.

Multinomial Experiment

An experiment that leads to outcomes classified into more than two categories, which are mutually exclusive and exhaustive.

Binomial Experiment

A statistical experiment that fits the criteria of having a fixed number of trials, two possible outcomes per trial, identical probability of success, and each trial being independent.

Multinomial Experiment

An experiment that leads to outcomes categorized into two or more non-overlapping categories.