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The baryon density of the Universe from an improved measurement of D(p,γ)3He cross section at LUNA


Video only at CERN
The talk will report about the publication “The baryon density of the Universe from an improved rate of deuterium burning”, Nature 587, 210–213(2020).
Light elements were produced in the first few minutes of the Universe through a sequence of nuclear reactions known as Big Bang nucleosynthesis (BBN). Among the light elements produced during BBN, deuterium is an excellent indicator of cosmological parameters because its abundance is highly sensitive to the primordial baryon density and also depends on the number of neutrino species permeating the early Universe. Although astronomical observations of primordial deuterium abundance have reached percent accuracy, theoretical predictions based on BBN are hampered by large uncertainties on the cross-section of the deuterium burning D(p,γ)3He reaction. An experiment to improve the knowledge of this cross-section have been performed at the Laboratory for Underground Nuclear Ast ....

Gran Sasso , Laboratory For Underground Nuclear Astrophysics , Big Bang , Underground Nuclear Astrophysics , Laboratori Nazionali Del Gran Sasso , Large Hadron Collider , High Energy Physics , கிரான் சஸ்ஸொ , ஆய்வகம் க்கு நிலத்தடி அணு வானியற்பியல் , பெரியது இடி , நிலத்தடி அணு வானியற்பியல் , பெரியது ஹாட்ரான் மோதல் , உயர் ஆற்றல் இயற்பியல் ,