Date/Time: Thu Feb 26 2026 at 14:00<br/><br/>Location: Auditorium/Remote<br/><br/>Speaker: Ulf-G. Meissner (University of Bonn, FZ Juelich)<br/><br/>Title: Fine-tunings in nuclear physics<br/><br/>Abstract: Element generation in the Big Bang and in stars is a fine laboratory to test possible variations
of the fundamental constants of the Standard Model. In this talk, I review the constraints
from primordial nucleosynthsesis on the electromagnetic fine-structure constant alpha_EM, the light quark masses mu, md, ms and the CP-violating Theta-parameter, with an emphasis on a thorough analysis of the systematic errors for the physical values of these parameters. Second, I discuss fine-tunings in the basic reactions generating the life-enabling elements carbon and oxygen via the triple-alpha process and the radiative alpha-capture on carbon, the so-called holy grail of nuclear astrophysics. Finally, I also make contact to the anthropic principle.
---
Remote Connection:
https://ubc.zoom.us/j/68099892709?pwd=RXafbpqP79cfh4atRzauRlUIVDQYhH.1
Meeting ID: 680 9989 2709
Passcode: 146064<br/><br/>Bring your own mug!<br/><br/>______________________________<br/><br/>Detailed information available can be found at <a href='https://www.triumf.ca/research-program/lectures-conferences/upcoming-seminars-lectures'>https://www.triumf.ca/research-program/lectures-conferences/upcoming-seminars-lectures</a> <br/><br/>